OLED touch display chip and OLED touch display device comprising same

文档序号：1888563 发布日期：2021-11-26 浏览：5次中文

阅读说明：本技术 Oled触控显示芯片及包含其的oled触控显示装置 (OLED touch display chip and OLED touch display device comprising same ) 是由陈昶宏林坤政林玮杰廖柏圣陈育煌于 2021-05-21 设计创作，主要内容包括：提供了一种OLED触控显示芯片,包括:至少一组显示驱动管脚,用于提供显示驱动信号给所述OLED触控显示面板；至少一组触控管脚,用于提供触控驱动信号给所述OLED触控显示面板上的触控电极,并且与至少一组显示驱动管脚分组交错布置；以及至少一组隔离管脚,其中,每一组隔离管脚包括至少一个隔离管脚并被布置在相邻的一组显示驱动管脚和一组触控管脚之间,并且至少一组隔离管脚中的一隔离管脚被配置为施加特定信号以用于对相邻的一组显示驱动管脚和一组触控管脚之间的信号干扰进行隔离,或者至少一组隔离管脚中的一隔离管脚被配置为施加特定信号或处于管脚浮置状态,以用于降低OLED触控显示面板上的数据线或触控电极的负载。(The OLED touch display chip comprises at least one group of display driving pins, a plurality of groups of display driving pins and a plurality of groups of display driving pins, wherein the display driving pins are used for providing display driving signals to the OLED touch display panel; the OLED touch display panel comprises at least one group of touch pins, at least one group of display driving pins and at least one group of display driving pins, wherein the touch pins are used for providing touch driving signals to touch electrodes on the OLED touch display panel and are arranged in a grouping and staggered mode with the at least one group of display driving pins; and at least one group of isolation pins, wherein each group of isolation pins comprises at least one isolation pin and is arranged between the adjacent group of display driving pins and the group of touch control pins, and one isolation pin in the at least one group of isolation pins is configured to apply a specific signal for isolating signal interference between the adjacent group of display driving pins and the group of touch control pins, or one isolation pin in the at least one group of isolation pins is configured to apply a specific signal or be in a pin floating state for reducing the load of a data line or a touch control electrode on the OLED touch control display panel.)

1. An OLED touch display chip for driving an OLED touch display panel, the OLED touch display chip comprising:

the display driving device comprises at least one group of display driving pins, a plurality of groups of display driving pins and a plurality of groups of display driving pins, wherein the display driving pins are used for providing display driving signals to the OLED touch display panel;

the OLED touch display panel comprises at least one group of touch pins, at least one group of display driving pins and at least one group of display driving pins, wherein the touch pins are used for providing touch driving signals to touch electrodes on the OLED touch display panel and are arranged in a grouping and staggered mode with the at least one group of display driving pins; and

at least one group of isolation pins, wherein each group of isolation pins comprises at least one isolation pin and is arranged between a group of adjacent display driving pins and a group of adjacent touch control pins, and an isolation pin in the at least one group of isolation pins is configured to apply a specific signal for isolating signal interference between the group of adjacent display driving pins and the group of adjacent touch control pins.

2. The OLED touch display chip of claim 1, wherein the isolation pin is configured to connect to one end of a pinout,

the other end of the leading-out wire extends towards the OLED touch display panel and does not extend into the display active area of the OLED touch display panel, or

The other end of the outgoing line extends to the edge of the fan-out area of the OLED touch display panel and does not extend into the fan-out area.

3. The OLED touch display chip of claim 1, wherein the particular signal is one of: a ground signal, a signal of a fixed potential, and a signal having a preset voltage waveform.

4. The OLED touch display chip of claim 3, wherein the signal having the predetermined voltage waveform is a signal having at least one same signal characteristic as the display driving signal and having at least one different signal characteristic,

wherein the signal characteristics include at least a portion of frequency, phase, amplitude, slew rate, DC offset.

5. The OLED touch display chip of claim 4, wherein the signal having the predetermined voltage waveform is of the same frequency and opposite phase as the display driving signal.

6. The OLED touch display chip of claim 4, wherein the signal having the preset voltage waveform is of the same frequency and opposite phase as the display drive signal, and the signal having the preset voltage waveform and the display drive signal are also identical in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate, DC offset.

7. The OLED touch display chip of claim 4, wherein the signal having the preset voltage waveform is of the same frequency as the display drive signal, and the signal having the preset voltage waveform and the display drive signal are further different in at least one signal characteristic, the at least one signal characteristic being at least one of phase, amplitude, slew rate, DC offset.

8. The OLED touch display chip of claim 3, wherein the signal having the predetermined voltage waveform is a signal having at least one same signal characteristic as the touch driving signal and having at least one different signal characteristic,

wherein the signal characteristics include at least a portion of frequency, phase, amplitude, slew rate, DC offset.

9. The OLED touch display chip of claim 8, wherein the signal having the predetermined voltage waveform is co-frequency and anti-phase with the touch driving signal.

10. The OLED touch display chip according to claim 8, wherein the signal having the preset voltage waveform is of the same frequency and opposite phase as the touch driving signal, and the signal having the preset voltage waveform and the touch driving signal are also identical in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate, and dc offset.

11. The OLED touch display chip according to claim 8, wherein the signal having the preset voltage waveform is of the same frequency as the touch driving signal, and the signal having the preset voltage waveform and the touch driving signal are further different in at least one signal characteristic, the at least one signal characteristic being at least one of phase, amplitude, slew rate, and dc offset.

12. The OLED touch display chip of claim 3,

providing the display drive signal during a display operation in each of a plurality of display frame periods, and providing the touch drive signal during a touch operation in each of a plurality of touch frame periods, wherein the display operation period and the touch operation period at least partially overlap, and,

at least one of the at least one set of spacer pins is configured to apply a signal having a preset voltage waveform during an overlap operation that at least partially overlaps with the touch operation during the display operation.

13. The OLED touch display chip of claim 12,

each display frame period further includes a frame scan blanking period and a line scan blanking period during which the display driving signal is not supplied, and each touch frame period further includes a touch interval period during which the touch driving signal is not supplied, wherein,

the at least one isolation pin is further configured to apply the ground signal or be in a floating state during at least one of the frame scan blanking period, the line scan blanking period, and the touch interval.

14. The OLED touch display chip of claim 12, wherein the at least one set of spacer pins includes a first set of spacer pins disposed between a first set of display driver pins and a first set of touch pins that are adjacent, and,

the first set of isolator pins includes:

a first isolation pin configured to apply a signal having a preset voltage waveform during the overlay operation, wherein the signal having the preset voltage waveform is a signal having the same frequency and opposite phase as the touch driving signal or a signal having the same frequency and opposite phase as the display driving signals of the first group of display driving pins; and

a second isolation pin disposed between the first set of touch pins and the first isolation pin and configured to be floated or to apply a signal of same frequency and phase as the touch driving signal during the touch operation.

15. The OLED touch display chip of claim 12, wherein the at least one set of spacer pins comprises a first set of spacer pins disposed between a first set of display driver pins and a first set of touch pins that are adjacent, and,

the first set of isolator pins includes:

a second isolation pin disposed between the first set of display drive pins and the first isolation pin and configured to be floated or apply signals of same frequency and phase as display drive signals of the first set of display drive pins during the display operation.

16. The OLED touch display chip of claim 14 or 15, wherein,

in a case where the signal having the preset voltage waveform is a signal having the same frequency and opposite phase as the touch driving signal, the signal having the preset voltage waveform and the touch driving signal are also identical in at least one signal characteristic, and,

in the case that the signal having the preset voltage waveform is a signal having the same frequency and opposite phase as the display driving signals of the first group of display driving pins, the signal having the preset voltage waveform and the display driving signals of the first group of display driving pins are also identical in at least one signal characteristic,

wherein the at least one signal characteristic is at least one of amplitude, slew rate, DC offset.

17. The OLED touch display chip of claim 14 or 15, wherein,

the first isolation pin is further configured to apply the ground signal or be in a floating state during at least one of the frame scan blanking period, the line scan blanking period, and the touch interval.

18. The OLED touch display chip of claim 14, wherein the first set of isolation pins further comprises:

a third isolation pin disposed between the first isolation pin and the second isolation pin and providing a load down driving signal to an isolation electrode between a cathode of the OLED touch display panel and the touch electrode during the touch operation,

and the load reduction driving signal provided by the third isolation pin and the touch control driving signal have the same frequency and phase.

19. The OLED touch display chip of claim 18, wherein the de-loading drive signal and the touch drive signal have different slew rates.

20. An OLED touch display device, comprising:

the OLED touch display chip of any one of claims 1-15, 18-19; and

and the OLED touch display panel is coupled with the OLED touch display chip.

21. The OLED touch display device of claim 20, wherein at least one outgoing line is disposed on the substrate of the OLED touch display panel, and the at least one set of isolation pins on the OLED touch display chip are connected to one end of the at least one outgoing line.

22. The OLED touch display device of claim 21, wherein the OLED touch display chip is bonded to the OLED touch display panel using a COG or COP package structure, and wherein the at least one set of isolation pins on the OLED touch display chip are directly connected to the at least one outlet.

23. The OLED touch display device of claim 21, wherein the OLED touch display chip is bonded to the OLED touch display panel using a COF package structure, and wherein the at least one set of isolation pins on the OLED touch display chip are connected to the at least one outlet via at least one additional outlet on a flexible circuit board in which the OLED touch display chip is packaged.

24. The OLED touch display device of claim 22 or 23, wherein the at least one lead-out line extends to an edge of a display active area of the OLED touch display panel and does not extend into the display active area.

25. The OLED touch display device of claim 20, wherein the OLED touch display chip is bonded to the OLED touch display panel using a COF package structure, and the at least one set of isolation pins on the OLED touch display chip are directly connected to at least one lead-out line on a flexible circuit board in which the OLED touch display chip is packaged, the at least one lead-out line extending to an edge of a fan-out area of the OLED touch display panel and not extending into the fan-out area.

26. An OLED touch display chip for driving an OLED touch display panel, the OLED touch display chip comprising:

at least one group of isolation pins, wherein each group of isolation pins comprises at least one isolation pin and is arranged between the adjacent group of display driving pins and the group of touch control pins, and one isolation pin in the at least one group of isolation pins is configured to apply a specific signal or be in a floating state so as to reduce the load of a data line of the OLED touch control display panel coupled with the group of display driving pins or the load of a touch control electrode on the OLED touch control display panel coupled with the group of touch control pins.

27. The OLED touch display chip of claim 26, wherein the isolation pin is configured to connect to one end of a pinout,

the other end of the leading-out wire extends towards the OLED touch display panel and does not extend into the display active area of the OLED touch display panel, or

The other end of the outgoing line extends to the edge of the fan-out area of the OLED touch display panel and does not extend into the fan-out area.

28. The OLED touch display chip of claim 26, wherein the particular signal is one of: a ground signal, a signal of a fixed potential, and a signal having a preset voltage waveform.

29. The OLED touch display chip of claim 28, wherein the signal having the predetermined voltage waveform is a signal having at least one same signal characteristic as the display driving signal,

wherein the signal characteristics include at least a portion of frequency, phase, amplitude, slew rate, DC offset.

30. The OLED touch display chip of claim 29, wherein the signal having the predetermined voltage waveform is co-frequency and in phase with the display driving signal.

31. The OLED touch display chip of claim 29, wherein the signal having the preset voltage waveform is of the same frequency and phase as the display drive signal, and the signal having the preset voltage waveform and the display drive signal are also identical in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate, dc offset.

32. The OLED touch display chip of claim 29, wherein the signal having the preset voltage waveform is of the same frequency as the display drive signal, and the signal having the preset voltage waveform and the display drive signal are further different in at least one signal characteristic, wherein the at least one signal characteristic is at least one of phase, amplitude, slew rate, dc offset.

33. The OLED touch display chip of claim 28, wherein the signal having the predetermined voltage waveform is a signal having at least one same signal characteristic as the touch driving signal,

wherein the signal characteristics include at least a portion of frequency, phase, amplitude, slew rate, DC offset.

34. The OLED touch display chip of claim 33, wherein the signal having the predetermined voltage waveform is co-frequency and in-phase with the touch driving signal.

35. The OLED touch display chip of claim 33, wherein the signal having the preset voltage waveform is of the same frequency and phase as the touch drive signal, and the signal having the preset voltage waveform and the touch drive signal are also identical in at least one signal characteristic, the at least one signal characteristic being at least one of amplitude, slew rate, dc offset.

36. The OLED touch display chip of claim 33, wherein the signal having the preset voltage waveform is of the same frequency as the touch drive signal, and the signal having the preset voltage waveform and the touch drive signal are further different in at least one signal characteristic, the at least one signal characteristic being at least one of phase, amplitude, slew rate, dc offset.

37. The OLED touch display chip of claim 28,

at least one of the at least one set of isolated pins is configured to apply a signal having a preset voltage waveform during the display operation or the touch operation.

38. The OLED touch display chip of claim 37, wherein the at least one set of spacer pins includes a first set of spacer pins disposed between a first set of display driver pins and a first set of touch pins that are adjacent, and,

the first set of isolator pins includes:

a first isolation pin configured to be floated or applied with a signal having a preset voltage waveform during the touch operation, wherein the signal having the preset voltage waveform is a signal having the same frequency and phase as the touch driving signal; and

a second isolation pin disposed between the first group of display driving pins and the first isolation pin and configured to apply a signal having a same frequency and an opposite phase as the touch driving signal or a signal having a same frequency and an opposite phase as the display driving signal of the first group of display driving pins during an overlap operation that at least partially overlaps the touch operation during the display operation.

39. The OLED touch display chip of claim 37, wherein the at least one set of spacer pins includes a first set of spacer pins disposed between a first set of display driver pins and a first set of touch pins that are adjacent, and,

the first set of isolator pins includes:

a first isolation pin configured to be floated or applied with a signal having a preset voltage waveform during the display operation, wherein the signal having the preset voltage waveform is a signal having the same frequency and phase as the display driving signals of the first group of display driving pins; and

a second isolation pin disposed between the first set of touch pins and the first isolation pin and configured to apply a signal having a same frequency and an opposite phase as the touch driving signal or a signal having a same frequency and an opposite phase as the display driving signal of the first set of display driving pins during an overlap operation that at least partially overlaps the touch operation during the display operation.

40. The OLED touch display chip of claim 38 or 39,

in case that the signal with the preset voltage waveform is a signal with same frequency and phase as the touch driving signal, the signal with the preset voltage waveform and the touch driving signal are also identical in at least one signal characteristic, and,

in the case that the signal with the preset voltage waveform is a signal with the same frequency and phase as the display driving signals of the first group of display driving pins, the signal with the preset voltage waveform and the display driving signals of the first group of display driving pins are also identical in at least one signal characteristic,

wherein the at least one signal characteristic is at least one of amplitude, slew rate, DC offset.

41. The OLED touch display chip of claim 38 or 39 wherein the first set of isolation pins further comprises:

a third isolation pin disposed between the first isolation pin and the second isolation pin and configured to provide a load down driving signal to an isolation electrode between a cathode of the OLED touch display panel and the touch electrode during the touch operation,

and the load reduction driving signal provided by the third isolation pin and the touch control driving signal have the same frequency and phase.

42. The OLED touch display chip of claim 41, wherein the de-loading drive signal and the touch drive signal have different slew rates.

43. An OLED touch display device, comprising:

the OLED touch display chip of any one of claims 26-39; and

and the OLED touch display panel is coupled with the OLED touch display chip.

44. The OLED touch display device of claim 43, wherein at least one lead-out line is disposed on the substrate of the OLED touch display panel, the at least one set of isolation pins on the OLED touch display chip being connected to the at least one lead-out line.

45. The OLED touch display device of claim 44, wherein the OLED touch display device is bonded to the OLED touch display chip using a COG or COP encapsulation structure, and wherein the at least one set of isolation pins on the OLED touch display chip are directly connected to the at least one outlet.

46. The OLED touch display device of claim 44, wherein the OLED touch display device is bonded to the OLED touch display chip using a COF package structure, and wherein the at least one set of isolation pins on the OLED touch display chip are connected to the at least one outlet via at least one additional outlet on a flexible circuit board in which the OLED touch display chip is packaged.

47. The OLED touch display device of claim 45 or 46, wherein the at least one lead-out line extends to an edge of a display active area of the OLED touch display panel and does not extend into the display active area.

48. The OLED touch display device of claim 43, wherein the OLED touch display device is bonded to the OLED touch display chip using a COF package structure, and wherein the at least one set of isolation pins on the OLED touch display chip are directly connected to at least one lead-out line on a flexible circuit board in which the OLED touch display chip is packaged, the at least one lead-out line extending to an edge of a fan-out area of the OLED touch display panel and not extending into the fan-out area.

Technical Field

The application relates to the technical field of touch display, in particular to an OLED touch display chip and an OLED touch display device comprising the same.

Background

It is known that a Touch and Display Driver Integration (TDDI) technology is adopted to integrate a Touch chip and a Display chip into a single Touch and Display Driver integrated chip (i.e., TDDI chip) so as to improve the Integration of the Touch Display device.

The traditional LCD TDDI chip only has a small number of display driving pins and touch control pins which are arranged in a grouping and staggered mode, and because the traditional chip adopts a display and touch control time-sharing driving mode, interference between a group of adjacent display driving pins and touch control pins can not occur. Future OLED TDDI chips still adopt an architecture in which display driving pins and touch control pins are arranged in groups in an interlaced manner. However, in order to avoid the problem of displaying the bright and dark bands, the OLED TDDI chip does not adopt a time-sharing driving method, and the display operation period (display operation period) and the touch operation period (touch operation period) are at least partially overlapped. In this case, a group of adjacent display driving pins and touch control pins will interfere with each other (including interference on a chip and interference on a fan-out area (fanout area) where a pin lead-out is located), which eventually causes a decrease in signal-to-noise ratio (SNR) of the touch control signal in terms of touch control, and causes a deviation of the pixel voltage from an expected target voltage due to the coupling of the touch control signal to the display driving pins in terms of display, resulting in a multi-band (multi-band) phenomenon.

In addition, coupling capacitance exists between adjacent touch pin outgoing lines and display driving pin outgoing lines in the fan-out area, and accordingly loads on corresponding touch electrodes and data lines are large.

Therefore, a new OLED touch display chip is needed to reduce the interference between a set of adjacent display driving pins and touch pins and to reduce the large load caused by the coupling capacitance between the outgoing lines.

Disclosure of Invention

Therefore, the present disclosure provides an OLED touch display chip and an OLED touch display device including the same.

According to one aspect of the disclosure, an OLED touch display chip is provided for driving an OLED touch display panel, and the OLED touch display chip comprises at least one group of display driving pins for providing display driving signals to the OLED touch display panel; the OLED touch display panel comprises at least one group of touch pins, at least one group of display driving pins and at least one group of display driving pins, wherein the touch pins are used for providing touch driving signals to touch electrodes on the OLED touch display panel and are arranged in a grouping and staggered mode with the at least one group of display driving pins; and at least one group of isolation pins, wherein each group of isolation pins comprises at least one isolation pin and is arranged between the adjacent group of display driving pins and the group of touch control pins, and one isolation pin in the at least one group of isolation pins is configured to apply a specific signal for isolating signal interference between the adjacent group of display driving pins and the group of touch control pins.

According to another aspect of the present disclosure, another OLED touch display chip is provided for driving an OLED touch display panel, the OLED touch display chip including: the display driving device comprises at least one group of display driving pins, a plurality of groups of display driving pins and a plurality of groups of display driving pins, wherein the display driving pins are used for providing display driving signals to the OLED touch display panel; the OLED touch display panel comprises at least one group of touch pins, at least one group of display driving pins and at least one group of display driving pins, wherein the touch pins are used for providing touch driving signals to touch electrodes on the OLED touch display panel and are arranged in a grouping and staggered mode with the at least one group of display driving pins; and at least one group of isolation pins, wherein each group of isolation pins comprises at least one isolation pin and is arranged between the adjacent group of display driving pins and the group of touch control pins, and one isolation pin in the at least one group of isolation pins is configured to apply a specific signal or be in a pin floating state so as to reduce the load of a data line of the OLED touch control display panel to which the group of display driving pins are coupled or the load of a touch control electrode on the OLED touch control display panel to which the group of touch control pins are coupled.

According to another aspect of the present disclosure, an OLED touch display device is provided, which includes the above-mentioned OLED touch display chip or another OLED touch display chip, and an OLED touch display panel coupled to the OLED touch display chip.

In order to make the aforementioned and other features and advantages of the disclosure more comprehensible, embodiments accompanied with figures are listed below.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure and not to limit the disclosure. In the drawings, like reference numbers generally represent like parts or steps.

Fig. 1 shows a schematic diagram of a pin arrangement on a prior art OLED TDDI chip.

Fig. 2 shows a schematic diagram of a pin arrangement on an OLED TDDI chip according to an embodiment of the present disclosure.

Figure 3 shows a schematic diagram of a pinout arrangement of isolated pins according to an embodiment of the present disclosure.

FIG. 4 shows a timing diagram of display and touch according to an embodiment of the invention.

Fig. 5 shows a first example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to an embodiment of the present invention.

Fig. 6 shows a second example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

Fig. 7 shows a third example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

Fig. 8 is a schematic diagram illustrating an OLED TDDI chip bonded to an OLED touch display panel by using a COG packaging structure according to an embodiment of the present invention.

Fig. 9 is a schematic diagram illustrating an OLED TDDI chip bonded to an OLED touch display panel by using a COP encapsulation structure according to an embodiment of the invention.

Fig. 10 is a schematic diagram illustrating an OLED TDDI chip bonded to an OLED touch display panel by using a COF package structure according to an embodiment of the invention.

Fig. 11 shows a fourth example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

Fig. 12 shows a fifth example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

Fig. 13 shows a sixth example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

Detailed Description

The terms "first," "second," and the like, as used throughout this disclosure, including the claims, are used to designate elements (elements) or to distinguish between different embodiments or ranges, and are not used to limit the number of elements, upper or lower, nor the order of the elements. Further, wherever possible, elements/components/steps with the same reference numbers in the drawings and the description represent the same or similar parts. Elements/components/steps that use the same reference numerals or use the same terminology in different embodiments may be referred to one another in relation to the description.

A pin arrangement of an OLED touch display (TDDI) chip for reducing interference according to an embodiment of the present disclosure is first introduced.

According to the embodiment of the disclosure, under the architecture that the display driving pins and the touch control pins on the current OLED TDDI chip are arranged in groups in a staggered manner, by newly adding an isolation pin (isolation pad) between an adjacent group of display driving pins and a group of touch control pins and applying a specific signal to a leading-out wire connected with the isolation pin, the interference between the adjacent group of display driving pins and the group of touch control pins is reduced.

Each display driving pin in fig. 1 can be coupled to a data line on the OLED touch display panel, and provides a display driving signal to the capacitor of the corresponding display pixel through the data line to charge the capacitor, so as to drive the OLED to emit light. Each touch pin in fig. 1 can provide a touch driving signal to a touch electrode on the OLED touch display panel. As shown in fig. 1, since the display driving pins and the touch control pins are arranged in a staggered manner in groups, when the OLED TDDI chip does not adopt a time-sharing driving manner, the display driving signals provided by a group of adjacent display driving pins and the touch control driving signals provided by a group of touch control pins interfere with each other, thereby affecting the display effect and the sensitivity of touch control detection.

Fig. 2 shows a schematic diagram of a pin arrangement on an OLED TDDI chip according to an embodiment of the present disclosure. As shown in fig. 2, in order to reduce signal interference between an adjacent set of display driving pins and a set of touch control pins, at least one set of isolation pins 1-M is added on the OLED TDDI chip 101, and each set of isolation pins is disposed between the adjacent set of display driving pins and the set of touch control pins. It should be noted that although only one spacer pin per set is shown in fig. 1, as will be described in detail below, each set may also include more than one spacer pin.

After the isolation pins are added, a specific signal can be further applied to the outgoing line thereof by using part or all of the isolation pins so as to isolate signal interference between an adjacent group of display driving pins and a group of touch control pins. The type of specific signals and the placement of the isolation pins will be further described below.

Pinout arrangements for isolated pins according to embodiments of the present disclosure are described below in conjunction with figure 3. Figure 3 shows a schematic diagram of a pinout arrangement of isolated pins according to an embodiment of the present disclosure. It should be noted that fig. 3 is only an illustration, and the line width, pitch or routing direction of the pinouts is not limited, and in reality, the arrangement of the pinouts in the fan-out area 303 is a sector.

Specifically, each of the isolation pins may be configured to be connected to one end of a lead-out line, and the other end of the lead-out line may extend toward the OLED touch display panel and not extend into an Active Area (AA) of the OLED touch display panel. For example, as shown in fig. 3, the other end of pinout 301 connecting the respective isolation pins may extend through fan-out region 303 to the edge of display active region 302, but not extend into display active region 302. Thus, by having each spacer pin apply a specific signal to its pinout 301, not only can interference occurring on the OLED TDDI chip 101 be reduced, but interference occurring on the fan-out region 303 (i.e., interference occurring between adjacent touch and display drive pinouts) can also be reduced. Fig. 3 may illustrate a package structure in which the OLED TDDI chip 101 is bonded to a substrate of the OLED touch display panel, such as cog (chip on glass) or cop (chip on plastic), in which the lead-out line 301 is a part of the fan-out line in the fan-out region 303. In another example of the package structure, particularly a package structure in which the OLED TDDI chip 101 is bonded to a substrate of the OLED touch display panel through another substrate, such as a COF (chip On film), a portion of the lead line 301 is in the fan-out region 303, and another portion of the lead line 301 is a wire (not shown) connected to a pad and an outer lead (outer lead) of the OLED TDDI chip 101 On the substrate of the COF package. In another example of a COF package structure, the other end of pinout 301 may extend only to the edge of fan-out region 303 and not into fan-out region 303 (not shown) to meet specific routing design requirements, and is not limited herein.

The type of specific signal applied by the isolation pin to isolate signal interference will be described next. It should be noted that the same or different specific signals may be applied using different isolation pins, or only a portion of the isolation pins may be used to apply specific signals while another portion of the isolation pins are left floating. However, in order to achieve a better interference reduction effect, it is preferable that a specific signal for isolating signal interference is applied using all the isolation pins.

Specifically, the specific signal applied by an isolated pin may be one of the following: a ground signal, a signal of a fixed potential, and a signal having a preset voltage waveform.

In one example, to reduce interference caused by a display driving signal on the display driving pin, the signal having the predetermined voltage waveform may be a signal having at least one same signal characteristic as the display driving signal and at least one different signal characteristic, wherein the signal characteristic includes at least one of frequency, phase, amplitude, slew rate, and direct current offset (DC offset).

Preferably, the signal having the preset voltage waveform may be a signal having the same frequency and opposite phase to the display driving signal, so as to better cancel interference caused by the display driving signal. In the case where the signal having the preset voltage waveform is of the same frequency and opposite phase as the display driving signal, the two signals may further be identical in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate, and dc offset. Therefore, when the signal with the preset voltage waveform and the display driving signal which are the same in frequency and opposite in phase with the display driving signal are closer to each other in other signal characteristics, the signal with the preset voltage waveform can play a better interference suppression effect, and the interference on the touch control pins beside the isolation pins is reduced.

In this example, the signal having the preset voltage waveform may be at the same frequency as the display driving signal, and the signal having the preset voltage waveform and the display driving signal further differ in at least one signal characteristic, wherein the at least one signal characteristic is at least one of phase, amplitude, slew rate, dc offset. For example, the signal having the preset voltage waveform may be a signal having the same frequency as the display driving signal but not completely inverted (i.e., the phase difference is not 180 degrees), and the phase difference between the signal having the preset voltage waveform and the display driving signal may be close to 180 degrees, thereby also providing a corresponding interference suppression effect.

In another example, in order to reduce interference caused by a touch driving signal on a touch pin, the signal having the predetermined voltage waveform may be a signal having at least one same signal characteristic as the touch driving signal and at least one different signal characteristic, wherein the signal characteristic includes at least one of frequency, phase, amplitude, slew rate (slew rate), and direct current offset (DC offset).

Preferably, the signal having the preset voltage waveform may be a signal having the same frequency and opposite phase to the touch driving signal, so as to better cancel interference caused by the touch driving signal. Under the condition that the signal with the preset voltage waveform and the touch driving signal have the same frequency and are opposite in phase, the two signals can be further identical in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate and direct current bias. Therefore, when the signal with the preset voltage waveform and the touch drive signal which are the same in frequency and opposite in phase with the touch drive signal are closer to each other in other signal characteristics, the signal with the preset voltage waveform can play a better interference suppression effect, and the interference on the display drive pin beside the isolation pin is reduced.

In this example, the signal having the preset voltage waveform may have the same frequency as the touch driving signal, and the signal having the preset voltage waveform and the touch driving signal further differ in at least one signal characteristic, wherein the at least one signal characteristic is at least one of phase, amplitude, slew rate, and dc offset. For example, the signal having the preset voltage waveform may be a signal having the same frequency as the touch driving signal but not an opposite phase (i.e., the phase difference is not 180 degrees), and the phase difference between the signal having the preset voltage waveform and the touch driving signal may be close to 180 degrees, thereby providing a corresponding interference suppression effect.

A period during which a signal having a preset voltage waveform is applied according to an embodiment of the present invention will be described below with reference to fig. 4. FIG. 4 shows a timing diagram of display and touch according to an embodiment of the invention.

Specifically, fig. 4 schematically shows a display frame period (display frame period)401 having a length of 16.6ms and a touch frame period (touch frame period)402 having a length of 8.3ms based on a display scan rate of 60Hz and a touch scan rate of 120Hz, where one display frame period 401 corresponds to two touch frame periods 402. The display driving signal is supplied during a display operation period 403 in each display frame period 401, and the touch driving signal is supplied during a touch operation period 404 in each touch frame period 402. In addition, each display frame period 401 further includes a plurality of frame scanning blank periods (V scanning period)405 and line scanning blank periods (H scanning period)406 in which the display driving signal is not provided, and each touch frame period 402 further includes a touch interval period (touch interval period)407 in which the touch driving signal is not provided.

As shown in fig. 4, the display operation period 403 and the touch operation period 404 at least partially overlap, and the isolation pin may be configured to apply a signal having a preset voltage waveform during an overlap operation period in which the display operation period 403 and the touch operation period 404 at least partially overlap. That is, the spacer pin may be configured to apply a signal having a preset voltage waveform for reducing interference only during a period in which interference actually occurs in display and touch (i.e., during the overlapping operation described above).

During the non-interference period in which the display driving signal is not provided or the touch driving signal is not provided, that is, the frame scan blanking period 405, the line scan blanking period 406, and the touch interval period 407 described above, the isolation pin may not apply a signal having a predetermined voltage waveform for reducing interference. Alternatively, during non-interference, the isolation pins may be used to reduce the large load on the data lines or touch electrodes due to coupling capacitance between the pinouts. In particular, the isolation pin may be configured to apply a ground signal or be in a floating state during at least one of a frame scan blanking period, a line scan blanking period, and a touch interval period in order to reduce a large load due to coupling capacitance, as described in further detail below.

An example of the positional arrangement of the isolation pins and the types of signals having preset voltage waveforms according to an embodiment of the present invention is described next with reference to fig. 5. Fig. 5 shows a first example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to an embodiment of the present invention.

As shown in fig. 5, a first set of isolation pins 501 is disposed between a first set of display driving pins 502 and a first set of touch pins 503, which include a first isolation pin 504 and a second isolation pin 505. The first isolation pin 504 may be configured to apply a signal having a preset voltage waveform during the overlay operation, where the signal having the preset voltage waveform may be a signal having the same frequency and opposite phase as the touch driving signal or a signal having the same frequency and opposite phase as the display driving signals of the first group of display driving pins 502. That is, the first isolation pin 504 may be configured to apply a signal having the same frequency and opposite phase as the touch driving signal or the display driving signal for reducing interference caused by the touch driving signal or the display driving signal. For example, fig. 5 shows that the first spacer pin 504 is configured to apply a signal that is in the same frequency and opposite phase as the display driving signal for reducing interference caused by the display driving signal. Where the first spacer pins 504 are configured to apply signals of the same frequency and phase opposition as the display drive signals of the first set of display drive pins 502, if different ones of the first set of display drive pins 502 have different display drive signals, the same frequency and phase opposition signals may be applied according to the display drive signal on the display drive pin that is located closest to the first spacer pins 504.

In this example, since the second isolation pin 505 is disposed between the first set of touch pins 503 and the first isolation pin 504, the second isolation pin 505 may be configured to be floated or apply a signal of the same frequency and phase as the touch drive signal during touch operation to isolate the coupling capacitance between the outlet of the first isolation pin 504 and the adjacent outlet of the touch pins (i.e., the outlet of the first set of touch pins 503 that is positionally closest to the outlet of the first isolation pin 504). That is, the second isolation pin 505 may be used to reduce a large load on the touch electrode due to a coupling capacitance between the outgoing line of the first isolation pin 504 and the outgoing line of the adjacent touch pin, so as to protect the touch driving signal from the signal on the outgoing line of the first isolation pin 504, thereby improving the touch sensitivity.

Fig. 6 shows a second example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

As shown in fig. 6, a first set of isolation pins 601 is disposed between adjacent first set of display driving pins 602 and first set of touch pins 603, and includes a first isolation pin 604 and a second isolation pin 605. The first isolation pin 604 may be configured to apply a signal having a preset voltage waveform during the overlay operation, wherein the signal having the preset voltage waveform may be a signal having the same frequency and opposite phase as the touch driving signal or a signal having the same frequency and opposite phase as the display driving signals of the first group of display driving pins 602. That is, the first isolation pin 604 may be configured to apply a signal having the same frequency and opposite phase as the touch driving signal or the display driving signal for reducing interference caused by the touch driving signal or the display driving signal. For example, fig. 6 shows that the first isolation pin 604 is configured to apply a signal with the same frequency and opposite phase as the touch driving signal for reducing interference caused by the touch driving signal. Similarly, where the first spacer pin 604 is configured to apply a signal that is of the same frequency and phase opposition as the display drive signals of the first set of display drive pins 602, if different ones of the first set of display drive pins 602 have different display drive signals, then the same frequency and phase opposition signal may be applied according to the display drive signal on the display drive pin that is located closest to the first spacer pin 604.

In this example, since the second isolation pin 605 is disposed between the first group of display drive pins 602 and the first isolation pin 604, the second isolation pin 605 may be configured to float or apply a signal of the same frequency and phase as the display drive signals of the first group of display drive pins 602 during display operation to isolate the coupling capacitance between the pinout of the first isolation pin 604 and the adjacent display drive pin pinout (i.e., the pinout of the first group of display drive pins 602 that is positionally closest to the pinout of the first isolation pin 604). That is, the second isolation pin 605 may be used to reduce a large load on the data line due to a coupling capacitance between the outlet of the first isolation pin 604 and the outlet of the adjacent display driving pin, to protect the display driving signal from the signal on the outlet of the first isolation pin 604, thereby improving the display effect. Similarly, if different ones of the first set of display driver pins 602 have different display driver signals, the same frequency and same phase signals may be applied according to the display driver signal on the display driver pin that is located closest to the first spacer pin 604.

As described above, in the case that the signal with the preset voltage waveform is a signal with the same frequency and opposite phase as the touch driving signal, the signal with the preset voltage waveform may be the same as the touch driving signal in at least one signal characteristic; also, in the case that the signal with the preset voltage waveform is a signal with the same frequency and opposite phase as the display driving signals of the first group of display driving pins 502 and 602, the signal with the preset voltage waveform may be the same as the display driving signals of the first group of display driving pins 502 and 602 in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate and dc offset. That is, when a co-frequency inverted signal for reducing interference is applied, the co-frequency inverted signal and a corresponding touch driving signal or display driving signal can be made to be the same as possible in other signal characteristics, so as to obtain a better interference suppression effect.

In addition, as described above, each display frame period further includes a frame scan blanking period and a line scan blanking period in which the display driving signal is not supplied, and each touch frame period further includes a touch interval period in which the touch driving signal is not supplied. Accordingly, the first isolation pins 504, 604 may be configured to apply a signal having a preset voltage waveform only during the overlap operation in which interference actually occurs so as to reduce the interference, and configured to reduce the load during the above-described frame scan blank period, line scan blank period, and touch interval in which interference does not occur. In particular, the first isolation pins 504, 604 may be configured to apply a ground signal or be in a floating state during at least one of a frame scan blanking period, a line scan blanking period, and a touch interval period in order to reduce a large load on the data lines or touch electrodes due to coupling capacitance.

Fig. 7 shows a third example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

Compared to the first set of spacer pins 501 shown in fig. 5, which includes the first spacer pin 504 and the second spacer pin 505, the first set of spacer pins 501 shown in fig. 7 further includes a third spacer pin 701 arranged between the first spacer pin 504 and the second spacer pin 505, and the third spacer pin 701 can be configured to drive an entire layer of spacer electrodes between a layer (e.g., a cathode of an OLED) closest to a touch electrode and the touch electrode in an OLED display panel structure of the OLED touch display panel so as to reduce a load on the touch electrode. Specifically, the third isolation pin 701 may be configured to provide a load drop (loading free) driving signal with same frequency and phase as the touch driving signal to an isolation electrode between a cathode and a touch electrode of an OLED in the OLED touch display panel during a touch operation. For a common on-cell OLED touch display panel, the touch electrode is disposed above the OLED display panel, and the cathode of the OLED display panel is closest to the touch electrode. In another on-cell OLED touch display panel, it may be that the anode of the OLED is closest to the touch electrode. Thus, in summary, the isolated electrode may be an entire layer of electrodes between the OLED display panel and the on-cell touch electrode.

It should be noted that, due to the large load of the whole layer of isolation electrodes, the slew rate of the load reduction driving signal may be changed, so that the load reduction driving signal and the touch driving signal have different slew rates (as shown by arrows in fig. 7), that is, the load reduction driving signal and the touch driving signal are not actually completely in phase. Thus, in this example, the third isolation pin 701 is not directly adjacent to the first set of touch pins 503, but is directly adjacent to the second isolation pin 505, and the second isolation pin 505 may be configured to apply a signal that is in-phase and frequency with the touch drive signal during touch operation to isolate the coupling capacitance between the outlet of the third isolation pin 701 and the adjacent touch pin outlet. In another example, a signal with the same frequency and phase (or close to phase) as the touch driving signal may be applied to the first isolation pin 504 close to the display driving pin in fig. 7 instead to reduce the interference caused by the touch driving signal.

An example of a bonding manner of the OLED TDDI chip and the OLED touch display panel according to an embodiment of the present invention is described next with reference to fig. 8 to 10. Wherein descriptions of elements not related to the present disclosure are omitted below and in the drawings to avoid confusion.

Specifically, the OLED touch display device according to the embodiment of the invention may include the OLED touch display chip and an OLED touch display panel coupled to the OLED touch display chip. At least one outgoing line is arranged on the substrate of the OLED touch display panel, and at least one group of isolation pins on the OLED touch display chip are connected to one end of the at least one outgoing line. As described above, the other end of the outgoing line may extend toward the OLED touch display panel and not extend into the AA area of the OLED touch display panel. The OLED touch display Chip may be bonded to the OLED touch display panel using any one of a cog (Chip On glass), cop (Chip On plastic), and COF (Chip On Flex or Chip On Film) package structure, and the arrangement of the lead lines will be described below with reference to a specific package structure.

Fig. 8 is a schematic diagram illustrating an OLED TDDI chip bonded to an OLED touch display panel by using a COG packaging structure according to an embodiment of the present invention. As shown in fig. 8, the OLED TDDI chip 801 is disposed on a substrate 802 of the OLED touch display panel, and at least one set of isolated pins on the OLED touch display chip 801 may be directly connected to one end of at least one lead-out line 803 provided on the substrate 802. In one example, as shown in fig. 8, the other end of the at least one outgoing line 803 extends to an edge of a display active area (AA area) of the OLED touch display panel through the fan-out area and does not extend into the AA area. In another example, the at least one outlet 803 may also extend to the AA region, and in this case, the at least one outlet 803 may be located on the same metal layer as the touch sensing line.

Fig. 9 is a schematic diagram illustrating an OLED TDDI chip bonded to an OLED touch display panel by using a COP encapsulation structure according to an embodiment of the invention. As shown in fig. 9, the OLED TDDI chip 901 is disposed on the substrate 902 of the OLED touch display panel, and at least one set of isolated pins on the OLED touch display chip 901 may be directly connected to one end of at least one outgoing line 903 provided on the substrate 902. In one example, as shown in fig. 9, the other end of the at least one outgoing line 903 extends to the edge of the AA area of the OLED touch display panel through the fan-out area and does not extend into the AA area. In another example, the other end of the at least one pinout 903 may also extend to the AA region, and in this case, the at least one pinout 903 may be located on the same metal layer as the touch sensing line.

Fig. 10 is a schematic diagram illustrating an OLED TDDI chip bonded to an OLED touch display panel by using a COF package structure according to an embodiment of the invention. Unlike the COG and COP package structure in which the TDDI chip is directly disposed on the substrate of the OLED touch display panel, as shown in fig. 10, in the COF package structure, the OLED TDDI chip 1001 is packaged on a flexible circuit board (FPC)1004, and thus, at least one set of isolated pins of the OLED TDDI chip 1001 is directly connected to at least one additional outlet (not shown) on the FPC 1004. In this case, at least one set of isolated pins of the OLED TDDI chip 1001 may be connected to at least one lead-out 1003 on the substrate 1002 via the at least one additional lead-out, thereby being bonded to the substrate 1002. In another example, to meet specific routing design requirements, the at least one pinout 1003 may not be provided on the substrate 1002, but only the at least one pinout on the FPC 1004 may be utilized as a pinout for at least one set of isolated pins, and in this case, the at least one pinout of the isolated pins extends only to the edge of the fan-out area and not into the fan-out area.

Therefore, according to the OLED touch display chip and the OLED touch display device including the same of the embodiments of the present invention, interference between a set of display driving pins and a set of touch pins that are adjacent to each other can be reduced, and in addition, a load of a data line of the OLED touch display panel to which the set of display driving pins is coupled or a load of a touch electrode on the OLED touch display panel to which the set of touch pins is coupled can be further reduced, so that a better display effect and a better touch sensitivity can be achieved.

The pin arrangement of the OLED TDDI chip for load reduction according to an embodiment of the present disclosure is described next. It is to be noted that, since the pin arrangement for reducing the load is substantially the same in position as the above-described pin arrangement for reducing the interference, the pin arrangement for reducing the load will be specifically described in conjunction with the same drawings described above.

According to the embodiment of the disclosure, under the architecture that the display driving pins and the touch control pins on the current OLED TDDI chip are arranged in a group staggered manner, an isolation pin is newly added between the adjacent group of display driving pins and the group of touch control pins, and a specific signal is applied to the outgoing line connected to the isolation pin by using the isolation pin, or the isolation pin is in a floating state, so as to reduce the load of the data lines of the OLED touch control display panel to which the group of display driving pins is coupled or the load of the touch control electrodes on the OLED touch control display panel to which the group of touch control pins is coupled.

Fig. 1 shows a schematic diagram of a pin arrangement on a prior art OLED TDDI chip. As shown in FIG. 1, the OLED TDDI chip 101 includes at least one set of display driving pins 1-N and at least one set of touch pins 1-N arranged in a group-staggered manner. Each display driving pin can be coupled to a data line on the OLED touch display panel, and provides a display driving signal to the capacitor of the corresponding display pixel through the data line to charge the capacitor, so as to drive the OLED to emit light. Each touch pin can provide a touch driving signal to a touch electrode on the OLED touch display panel. As shown in fig. 1, since the display driving pins and the touch control pins are arranged in a staggered manner in groups, a large coupling capacitance exists between the adjacent touch control pin outgoing lines and the display driving pin outgoing lines in the fan-out area, and thus, loads on the corresponding touch control electrodes and the corresponding data lines are large, thereby affecting the display effect and the sensitivity of touch control detection.

Fig. 2 shows a schematic diagram of a pin arrangement on an OLED TDDI chip according to an embodiment of the present disclosure. As shown in fig. 2, in order to reduce the load of the data lines of the OLED touch display panel to which a set of display driving pins is coupled or the load of the touch electrodes on the OLED touch display panel to which a set of touch pins is coupled, at least one set of isolation pins 1-M is added on the OLED TDDI chip 101, and each set of isolation pins is disposed between an adjacent set of display driving pins and a set of touch pins. It should be noted that although only one spacer pin per set is shown in fig. 1, as will be described in detail below, each set may also include more than one spacer pin.

After the isolation pins are added, a specific signal can be further applied to the outgoing line of the isolation pin by using part or all of the isolation pins, or the part or all of the isolation pins are in a floating state, so as to isolate the coupling capacitance between the adjacent touch pin outgoing line and the display driving pin outgoing line, thereby reducing the load on the corresponding touch electrode or data line. The type of specific signals and the placement of the isolation pins will be further described below.

Specifically, each of the isolation pins may be configured to be connected to one end of an outgoing line, and the other end of the outgoing line may extend toward the OLED touch display panel and not extend into a display active (AA) region of the OLED touch display panel. For example, as shown in fig. 3, the other end of pinout 301 connecting the respective isolation pins may extend through fan-out region 303 to the edge of display active region 302, but not extend into display active region 302. Therefore, by causing each isolation pin to apply a specific signal to its pinout 301 or to be in a floating state, the coupling capacitance between the adjacent touch pin pinout and display drive pin pinout in the fan-out area 303 can be isolated. Fig. 3 may illustrate a package structure in which the OLED TDDI chip 101 is bonded to a substrate of the OLED touch display panel, such as cog (chip on glass) or cop (chip on plastic), in which the lead-out line 301 is a part of the fan-out line in the fan-out region 303. In another example of the package structure, particularly a package structure in which the OLED TDDI chip 101 is bonded to a substrate of the OLED touch display panel through another substrate, such as a COF (chip On film), a portion of the lead line 301 is in the fan-out region 303, and another portion of the lead line 301 is a wire (not shown) connected to a pad and an outer lead (outer lead) of the OLED TDDI chip 101 On the substrate of the COF package. In another example of a COF package structure, the other end of pinout 301 may extend only to the edge of fan-out region 303 and not into fan-out region 303 (not shown) to meet specific routing design requirements, and is not limited herein.

The type of specific signal applied by the isolation pin to reduce the load will be described next. It should be noted that the same or different specific signals may be applied using different isolation pins, or only a portion of the isolation pins may be used to apply specific signals while another portion of the isolation pins are left floating. However, preferably, in order to achieve a better load reduction effect, the spacer pin may be made to apply a signal having the same frequency and phase as the display driving signal or the touch driving signal, or may be made to be in a floating state.

Specifically, the specific signal applied by an isolated pin may be one of the following: a ground signal, a signal of a fixed potential, and a signal having a preset voltage waveform.

In one example, to reduce the load on the data lines to which a set of display driving pins are coupled, the signal having the predetermined voltage waveform may be a signal having at least one same signal characteristic as the display driving signal, wherein the signal characteristic includes at least one of frequency, phase, amplitude, slew rate, and dc offset.

Preferably, the signal having the preset voltage waveform may be a signal having the same frequency and phase as the display driving signal, so as to better achieve the load reduction effect. In the case where the signal having the preset voltage waveform is of the same frequency and phase as the display driving signal, the two signals may further be identical in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate, and dc offset. Therefore, when the signal with the preset voltage waveform and the display driving signal which are in the same frequency and phase with the display driving signal are closer to each other in other signal characteristics, the better load reduction effect can be achieved by the signal with the preset voltage waveform.

In this example, the signal having the preset voltage waveform may be at the same frequency as the display driving signal, and the signal having the preset voltage waveform and the display driving signal further differ in at least one signal characteristic, wherein the at least one signal characteristic is at least one of phase, amplitude, slew rate, dc offset. For example, the signal having the preset voltage waveform may be a signal having the same frequency as the display driving signal but not completely the same phase, and the phase difference between the signal having the preset voltage waveform and the display driving signal may be close to 0 degree, thereby also providing a corresponding load reduction effect.

In another example, to reduce the load of the touch electrode coupled to a set of touch pins, the signal having the predetermined voltage waveform may be a signal having at least one same signal characteristic as the touch driving signal, wherein the signal characteristic includes at least one of frequency, phase, amplitude, slew rate, and dc offset.

Preferably, the signal with the preset voltage waveform may be a signal with the same frequency and phase as the touch driving signal, so that the effect of load reduction can be better achieved. Under the condition that the signal with the preset voltage waveform and the touch driving signal have the same frequency and phase, the two signals can be further identical in at least one signal characteristic, wherein the at least one signal characteristic is at least one of amplitude, slew rate and direct current offset. Therefore, when the signal with the preset voltage waveform and the touch driving signal which are the same in frequency and phase as the touch driving signal are closer to each other in other signal characteristics, the signal with the preset voltage waveform can play a better load reduction effect.

In this example, the signal having the preset voltage waveform may have the same frequency as the touch driving signal, and the signal having the preset voltage waveform and the touch driving signal further differ in at least one signal characteristic, wherein the at least one signal characteristic is at least one of phase, amplitude, slew rate, and dc offset. For example, the signal having the preset voltage waveform may be a signal having the same frequency as the touch driving signal but not completely the same phase, and a phase difference between the signal having the preset voltage waveform and the touch driving signal may be close to 0 degree, thereby providing a corresponding load reduction effect.

Specifically, fig. 4 schematically shows a display frame period (display frame period)401 having a length of 16.6ms and a touch frame period (touch frame period)402 having a length of 8.3ms based on a display scan rate of 60Hz and a touch scan rate of 120Hz, where one display frame period 401 corresponds to two touch frame periods 402. A display driving signal is provided during a display operation period 403 within each display frame period 401, and a touch driving signal is provided during a touch operation period 404 within each touch frame period 402, wherein the display operation period 403 and the touch operation period 404 at least partially overlap. In addition, each display frame period 401 further includes a plurality of frame scanning blank periods (V scanning period)405 and line scanning blank periods (H scanning period)406 in which the display driving signal is not provided, and each touch frame period 402 further includes a touch interval period 407 in which the touch driving signal is not provided.

Wherein the isolated pin may be configured to apply a signal having a preset voltage waveform during the display operation period 403 or the touch operation period 404. For example, the isolation pin may be configured to apply a signal that is in frequency and phase with the display drive signal during the display operation 403, or the isolation pin may be configured to apply a signal that is in frequency and phase with the touch drive signal during the touch operation 404. That is, the isolation pin may be configured to apply a signal having a preset voltage waveform for reducing a load of the data line or the touch electrode only during the presence of the display driving signal or the touch driving signal.

An example of the positional arrangement of the spacer pins and the types of signals having preset voltage waveforms according to an embodiment of the present invention is described next with reference to fig. 11. Fig. 11 shows a fourth example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

As shown in fig. 11, a first set of isolation pins 1101 is disposed between adjacent first set of display driver pins 1102 and first set of touch pins 1103, which includes first isolation pins 1104 and second isolation pins 1105. In this example, the first isolation pin 1104 may be configured to be floated or to apply a signal having a preset voltage waveform during a touch operation, wherein the signal having the preset voltage waveform may be a signal having the same frequency and phase as the touch driving signal. That is, the first isolation pin 1104 can be configured to be in a floating state or to apply a signal with the same frequency and phase as the touch driving signal for reducing the load of the touch electrode coupled to the first set of touch pins 1103, thereby improving the touch sensitivity.

In this example, the second spacer pin 1105 is disposed between the first set of display drive pins 1102 and the first spacer pin 1104 and may be configured to apply a signal that is of the same frequency and opposite phase as the touch drive signal or the display drive signal of the first set of display drive pins 1102 during the overlay operation. That is, the second isolation pin 1105 may be configured to apply a signal with the same frequency and opposite phase as the touch driving signal or the display driving signal for reducing interference caused by the touch driving signal or the display driving signal. For example, fig. 11 shows that the second isolation pin 1105 is configured to apply a signal with same frequency and opposite phase to the touch driving signal for reducing interference caused by the touch driving signal. In the case where the second spacer pins 1105 are configured to apply a signal of the same frequency and phase opposition as the display drive signals of the first group of display drive pins 1102, if different ones of the first group of display drive pins 1102 have different display drive signals, the same frequency and phase opposition signal may be applied according to the display drive signal on the display drive pin of the first group of display drive pins 1102 that is located closest to the second spacer pins 1105.

Fig. 12 shows a fifth example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

As shown in fig. 12, a first set of isolation pins 1201 is disposed between adjacent first set of display driver pins 1202 and first set of touch pins 1203, which includes first isolation pins 1204 and second isolation pins 1205. In this example, the first isolation pin 1204 may be configured to be floated or apply a signal having a preset voltage waveform during display operation, where the signal having the preset voltage waveform may be a signal that is in-phase and co-frequency with the display drive signals of the first set of display drive pins 1202. That is, the first isolation pin 1204 may be configured to be in a floating state or to apply a signal having the same frequency and phase as the display driving signal for reducing the load of the data line to which the first set of display driving pins 1202 is coupled, thereby improving the display effect. Wherein if different ones of the first set of display driver pins 1202 have different display driver signals, the same frequency and same phase signals may be applied according to the display driver signals on the display driver pins of the first set of display driver pins 1202 that are located closest to the first isolation pin 1204.

In this example, the second spacer pins 1205 are arranged between the first set of touch pins 1203 and the first spacer pins 1204 and may be configured to apply a signal that is of the same frequency and opposite phase as the touch drive signal or the display drive signal of the first set of display drive pins 1202 during the overlay operation. That is, the second isolation pin 1205 may be configured to apply a signal with the same frequency and opposite phase as the touch driving signal or the display driving signal for reducing interference caused by the touch driving signal or the display driving signal. For example, FIG. 12 shows that the second isolation pin 1205 is configured to apply a signal that is of the same frequency and opposite phase as the display drive signals of the first set of display drive pins 1202 for reducing interference caused by the display drive signals. Similarly, where the second spacer pins 1205 are configured to apply signals of the same frequency and phase opposition as the display drive signals of the first set of display drive pins 1202, if different ones of the first set of display drive pins 1202 have different display drive signals, the same frequency and phase opposition signals may be applied according to the display drive signals on the display drive pins of the first set of display drive pins 1202 that are closest in position to the second spacer pins 1205.

As described above, in the case that the signal with the preset voltage waveform is a signal with the same frequency and phase as the touch driving signal, the signal with the preset voltage waveform may be the same as the touch driving signal in at least one signal characteristic; and, in a case that the signal having the preset voltage waveform is a signal having the same frequency and phase as the display driving signal of the first group of display driving pins, the signal having the preset voltage waveform may be the same as the display driving signal of the first group of display driving pins in at least one signal characteristic, where the at least one signal characteristic is at least one of amplitude, slew rate and dc offset. That is, when the same-frequency and same-phase signals for reducing the load are applied, the same-frequency and same-phase signals and the corresponding touch driving signals or display driving signals can be made to be the same as possible in other signal characteristics, so as to obtain a better load reduction effect.

Fig. 13 shows a sixth example of the positional arrangement of the isolation pins and the signals having the preset voltage waveforms according to the embodiment of the present invention.

Compared to the first set of isolation pins 1101 shown in fig. 11, which includes the first isolation pin 1104 and the second isolation pin 1105, the first set of isolation pins 1101 shown in fig. 13 further includes a third isolation pin 1301 arranged between the first isolation pin 1104 and the second isolation pin 1105, and the third isolation pin 1301 can be configured to drive an entire layer of isolation electrodes between a layer (e.g., a cathode of an OLED) closest to the touch electrode and the touch electrode in the OLED display panel structure of the OLED touch display panel so as to reduce the load on the touch electrode. Specifically, the third isolation pin 1301 can be configured to provide a load-dropping driving signal with same frequency and phase as the touch driving signal to an isolation electrode between a cathode and a touch electrode of an OLED in the OLED touch display panel during a touch operation. For a common on-cell OLED touch display panel, the touch electrode is disposed above the OLED display panel, and the cathode of the OLED display panel is closest to the touch electrode. In another on-cell OLED touch display panel, it may be that the anode of the OLED is closest to the touch electrode. Thus, in summary, the isolated electrode may be an entire layer of electrodes between the OLED display panel and the on-cell touch electrode.

It should be noted that, due to the large load of the whole layer of isolation electrodes, the slew rate of the load reduction driving signal may be changed, so that the load reduction driving signal and the touch driving signal have different slew rates (as shown by arrows in fig. 13), that is, the load reduction driving signal and the touch driving signal are not actually completely in phase. Thus, in this example, the third isolation pin 1301 is not directly adjacent to the first set of touch pins 1103, but is directly adjacent to the first isolation pin 1104, and the first isolation pin 1104 can be configured to apply a signal that is in-phase and frequency with the touch drive signal during touch operation to isolate the coupling capacitance between the outlet of the third isolation pin 1301 and the adjacent touch pin outlet. In another example, a signal having the same frequency of inversion (or close to inversion) as the display driving signal may be applied instead to the second isolation pin 1105 in fig. 13 close to the display driving pin to reduce the interference caused by the display driving signal.

The OLED touch display device according to an embodiment of the present invention may include the OLED touch display chip and an OLED touch display panel coupled to the OLED touch display chip. At least one outgoing line is arranged on the substrate of the OLED touch display panel, and at least one group of isolation pins on the OLED touch display chip are connected to one end of the at least one outgoing line. As described above, the other end of the outgoing line may extend toward the OLED touch display panel and not extend into the AA area of the OLED touch display panel. In addition, the OLED touch display chip may be bonded to the OLED touch display panel by using any one of the COG, COP, and COF package structures, and since the example in which the OLED touch display chip is bonded to the OLED touch display panel by using one of the COG, COP, and COF package structures has been described above with reference to fig. 8 to 10, no further description is provided herein.

Therefore, according to the OLED touch display chip and the OLED touch display device including the same of the embodiments of the present invention, the load of the data line of the OLED touch display panel to which the group of display driving pins is coupled or the load of the touch electrode on the OLED touch display panel to which the group of touch pins is coupled can be reduced, and in addition, the interference between the adjacent group of display driving pins and the touch pins can be further reduced, so as to achieve better display effect and touch sensitivity.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

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