阅读说明：本技术 触摸显示面板以及电子设备 (Touch display panel and electronic device ) 是由 王勐 于 2021-08-31 设计创作，主要内容包括：一种触摸显示面板包括衬底以及电磁触摸单元。衬底包括显示区以及非显示区。电磁触摸单元设置在所述衬底上方,所述电磁触摸单元包括多个沿第一方向延伸设置的第一线圈以及多个沿第二方向延伸设置的第二线圈。所述显示区设置有多条扫描线以及多条数据线,所述扫描线与所述数据线绝缘交叉且区分有多个像素单元区域,每个所述像素单元区域均设置有像素电极以及设置在每一所述像素电极的共享金属走线。所述第一线圈与所述共享金属走线共用,达到触控与显示面板轻薄化,同时也可以增加触摸显示面板的产品附加价值。本发明还提供一种电子设备。(A touch display panel includes a substrate and an electromagnetic touch unit. The substrate includes a display region and a non-display region. The electromagnetic touch unit is arranged above the substrate and comprises a plurality of first coils extending along a first direction and a plurality of second coils extending along a second direction. The display area is provided with a plurality of scanning lines and a plurality of data lines, the scanning lines and the data lines are crossed in an insulating mode, a plurality of pixel unit areas are distinguished, and each pixel unit area is provided with a pixel electrode and a shared metal wire arranged on each pixel electrode. The first coil and the shared metal wire are shared, so that the touch control and display panel is light and thin, and the added value of the touch display panel can be increased. The invention also provides electronic equipment.)

1. A touch display panel, comprising:

a substrate including a display area and a non-display area surrounding the display area; and

the electromagnetic touch unit is arranged above the substrate and comprises a plurality of first coils extending along a first direction and a plurality of second coils extending along a second direction;

the display area is provided with a plurality of scanning lines which are parallel to each other and a plurality of data lines which are perpendicular to the scanning lines, the scanning lines and the data lines are crossed in an insulating mode and are divided into a plurality of pixel unit areas, each pixel unit area is provided with a pixel electrode and a shared metal wire arranged on each pixel electrode, and the first coil and the shared metal wires are shared.

2. The touch display panel of claim 1, further comprising at least one display signal driver circuit, at least one control circuit, and an integrated driver circuit electrically connected to the display signal driver circuit and the control circuit, wherein the integrated driver circuit performs display data transmission and processing with the at least one display signal driver circuit, and performs touch data transmission and processing between the integrated driver circuit and the at least one control circuit, wherein the display signal driver circuit and the control circuit are connected to the display area.

3. The touch display panel according to claim 2, wherein the number of the at least one control circuit includes a plurality of control circuits, one end of each of the first coils is electrically connected to each of the corresponding control circuits, and the other ends of the first coils are coupled together.

4. The touch display panel of claim 2, wherein the at least one control circuit further comprises a timing switch circuit for outputting a timing signal, the timing signal being a display signal when the display period is high and the electromagnetic touch period is low; when the display period is a low potential and the electromagnetic touch period is a high potential, the timing signal is an electromagnetic touch signal.

5. The touch display panel according to claim 4, wherein the timing switch circuit includes a first switch unit and a second switch unit, a source of the first switch unit is connected to the common metal trace, and a drain of the first switch unit is used for outputting the display signal; the source electrode of the second switch is connected with the shared metal wire, and the drain electrode of the second switch is used for outputting the electromagnetic touch signal.

6. The touch display panel according to claim 1, wherein in each frame of a display period, an electromagnetic touch period is performed during a blanking period of the frame so that the display period and the electromagnetic touch period do not interfere with each other.

7. The touch display panel of claim 1, wherein the common metal trace crosses over the scan lines and is disposed on the vertical trunk of each of the pixel electrodes, and each of the common metal traces is parallel to the data lines and is disposed between two adjacent data lines.

8. The touch display panel of claim 1 or 7, wherein the first coil, the second coil, the shared metal trace, and the pixel electrode are made of a metal, a metal alloy, or a transparent conductive material.

9. The touch display panel of claim 1, further comprising a common electrode disposed on a substrate, a gate insulating layer disposed on the common electrode, the shared metal trace and the data line disposed on the gate insulating layer, a passivation layer disposed on the shared metal trace and the data line, and the pixel electrode disposed on the passivation layer.

10. An electronic device, the touch display panel of any one of claims 1-9.

Technical Field

The present invention relates to the field of touch display technologies, and in particular, to a touch display panel and an electronic device that integrate an electromagnetic touch circuit and an LCD driving circuit.

Background

A Liquid Crystal Display (LCD) can implement a handwriting touch function. At present, the realization modes of capacitance type, electromagnetic type and the like are mainly available. Compared with capacitive signal transmission loss, electromagnetic handwriting touch control is smaller, and large size is easier to realize. As shown in fig. 1, in the conventional electromagnetic handwriting touch, a mesh electromagnetic coil 2 is fabricated on a plastic substrate, receives electromagnetic signals according to X-direction and Y-direction antenna arrays, and an electromagnetic pen 1 (driver) transmits the electromagnetic signals to interact with an electromagnetic induction board (receiver) on one side of a display screen. When the electromagnetic pen 1 is close to the display screen, the electromagnetic induction board of the display screen can induce the electromagnetic signal of the electromagnetic pen 1, so that the electromagnetic induction board changes, and the X, Y coordinate position where the electromagnetic pen 1 is located is obtained through the change calculation of the magnetic flux.

The electromagnetic touch circuit and the display driving circuit are separately arranged in the current LCD, so that the purpose of lightening and thinning the touch and display product cannot be achieved, and the added value of the product cannot be increased. The inventor thinks that the defects can be improved, and the inventor takes special attention to research and uses the scientific principle, and finally provides the invention which is reasonable in design and effectively improves the defects.

Disclosure of Invention

The present invention is directed to a touch display panel and an electronic device, which can achieve integration and thinning of an electromagnetic touch circuit and a display panel circuit, and can also increase the added value of the touch display panel.

To achieve the above object, the present invention provides a touch display panel, which includes a substrate and an electromagnetic touch unit. The substrate includes a display area and a non-display area surrounding the display area. The electromagnetic touch unit is arranged above the substrate and comprises a plurality of first coils extending along a first direction and a plurality of second coils extending along a second direction. The display area is provided with a plurality of scanning lines which are parallel to each other and a plurality of data lines which are perpendicular to the scanning lines, the scanning lines and the data lines are crossed in an insulating mode and are divided into a plurality of pixel unit areas, each pixel unit area is provided with a pixel electrode and a shared metal wire arranged on each pixel electrode, and the first coil and the shared metal wires are shared.

Preferably, the display device further comprises at least one display signal driving circuit, at least one control circuit, and an integrated driving circuit electrically connected to the display signal driving circuit and the control circuit, wherein the integrated driving circuit and the at least one display signal driving circuit transmit and process display data, the integrated driving circuit and the at least one control circuit transmit and process touch data, and the display signal driving circuit and the control circuit are connected to the display area.

Preferably, the number of the at least one control circuit includes a plurality of control circuits, one end of each of the first coils is electrically connected to each of the corresponding control circuits, and the other ends of the first coils are coupled together.

Preferably, the at least one control circuit further comprises a timing switch circuit for outputting a timing signal, wherein the timing signal is a display signal when the display period is at a high potential and the electromagnetic touch period is at a low potential; when the display period is a low potential and the electromagnetic touch period is a high potential, the timing signal is an electromagnetic touch signal.

Preferably, the timing switch circuit includes a first switch unit and a second switch unit, a source of the first switch unit is connected to the shared metal trace, and a drain of the first switch unit is used for outputting the display signal; the source electrode of the second switch is connected with the shared metal wire, and the drain electrode of the second switch is used for outputting the electromagnetic touch signal.

Preferably, in each frame of the display period, the electromagnetic touch period is performed in a blanking period of the frame, so that the display period and the electromagnetic touch period are not interfered with each other.

Preferably, the shared metal trace is disposed across the scan lines and on the vertical trunks of the pixel electrodes, and each of the shared metal traces is parallel to the data lines and disposed between two adjacent data lines.

Preferably, the first coil, the second coil, the shared metal trace, and the pixel electrode are made of a metal, a metal alloy, or a transparent conductive material.

Preferably, the liquid crystal display further comprises a common electrode stacked on the substrate, a gate insulating layer disposed on the common electrode, the shared metal trace and the data line disposed on the gate insulating layer, a passivation layer disposed on the shared metal trace and the data line, and the pixel electrode disposed on the passivation layer.

The invention further provides an electronic device, such as the touch display panel described in the foregoing embodiments.

The invention also has the following effects that the structure that the first coil and the shared metal routing (namely the X antenna and the Share _ bar) are shared/multiplexed can further reduce a manufacturing process, reduce the cost and improve the comprehensive yield on the basis of the circuit integration of the first coil of the electromagnetic touch unit and the pixel electrode of the touch display panel, thereby achieving the purposes of thinning the electromagnetic touch and display panel (reducing the thickness) and increasing the product added value of the touch display panel.

Drawings

In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a diagram of a conventional electromagnetic handwriting touch solenoid;

FIG. 2 is a schematic diagram of a first coil (X antenna) of the present invention;

FIG. 3 is a plan view of a touch display panel of the present invention;

FIG. 4 is a schematic diagram of a pixel cell area of a touch display panel of the present invention;

FIG. 5 is a schematic cross-sectional view of FIG. 4 at C-C;

FIG. 6 is a waveform diagram of display signals and electromagnetic touch signals of a display cycle in a touch display panel according to the present invention;

FIG. 7 is a schematic diagram of a touch display panel according to the present invention for distinguishing between display and electromagnetic touch signals by a time switch circuit; and

FIG. 8 is another schematic diagram of a touch display panel of the present invention distinguishing between display and electromagnetic touch signals.

Detailed Description

Reference in the detailed description to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the same phrases in various places in the specification are not necessarily limited to the same embodiment, but are to be construed as independent or alternative embodiments to other embodiments. In light of the disclosure of the embodiments provided by the present invention, it should be understood by those skilled in the art that the embodiments described in the present invention can have other combinations or variations consistent with the concept of the present invention.

As shown in fig. 2 to 5, the present invention provides a touch display panel 100, which includes a substrate 110 and an electromagnetic touch unit 200 (fig. 3). The substrate 110 includes a display area 112 and a non-display area 114 surrounding the display area 112. The electromagnetic touch unit 200 is disposed above the substrate 110, and the electromagnetic touch unit 200 includes a plurality of first coils 210(X antennas) extending along a first direction a and a plurality of second coils 220(Y antennas) extending along a second direction B, where the first coils 210 and the second coils 220 are crossed with each other and insulated from each other, and the first direction a and the second direction B are perpendicular to each other. When a touch point (not labeled) is at the position shown in fig. 2, the at least one control circuit 150 sequentially selects end point information of X3 and X6, X4 and X7, and X5 and X8 (i.e., sub-coils of the first coil 210) to detect and process position information of an electromagnetic touch signal received by the touch point, and the coordinate information of the a axis and the coordinate information of the B axis of the touch point where the electromagnetic touch occurs can be determined through the coordinate information of the a axis and the coordinate information of the B axis, so as to determine a final coordinate position of the touch point. Since the second coil 220 is a conventional coil, it is not described in detail in this embodiment.

The display area 112 is provided with a plurality of scan lines 116 parallel to each other and a plurality of data lines 118 perpendicular to the scan lines 116, the scan lines 116 and the data lines 118 are crossed in an insulating manner and are divided into a plurality of pixel unit areas 120, and each pixel unit area 120 is provided with a pixel electrode 122 and a shared metal trace 130(Share _ bar) arranged on each pixel electrode 122. In the embodiments shown in fig. 4 and fig. 5, the structure of the first coil 210 and the shared metal trace 130 (i.e., the X antenna and the Share _ bar) are shared/multiplexed, and by this embodiment, on the basis of the circuit integration of the first coil 210 of the electromagnetic touch unit 200 and the pixel electrode 122 of the touch display panel 100, a manufacturing process can be further reduced, the cost can be reduced, and the overall yield can be improved, so as to achieve the light and thin (thickness reduction) of the electromagnetic touch and display panel, and increase the product added value of the touch display panel 100.

As shown in fig. 3, the display device further includes at least one display signal driving circuit 140(Gate On Array, GOA), at least one control circuit 150(Chip On Film, COF), and an integrated driving circuit 160 electrically connected to the display signal driving circuit 140(GOA) and the control circuit 150. In this embodiment, the integrated driving circuit 160 and the at least one display signal driving circuit 140 may perform transmission and processing of display data, and the integrated driving circuit 160 and the at least one control circuit 150 perform receiving, transmission and processing of electromagnetic touch data, wherein the display signal driving circuit 140 and the control circuit 150 are connected to the display area 112. As shown in fig. 3 and 5, the number of the at least one control circuit 150 includes a plurality of control circuits, one end of the first coil 210 is electrically connected to each corresponding control circuit 150, and the other ends are coupled together. Specifically, each first coil 210 of the electromagnetic touch unit 200 is integrated on the common metal trace 130 of the touch display panel 100, and then led to each corresponding control circuit 150, so as to be connected to the integrated driving circuit 160 and/or other circuits.

In the embodiment shown in fig. 4 and 5, the common metal trace 130 preferably spans the scan lines 116 and is disposed on the vertical trunk of each pixel electrode 122, and each common metal trace 130 is parallel to the data lines 118 and is disposed between two adjacent data lines 118. The shared metal trace 130(Share _ bar) is disposed on a vertical trunk (trunk) trace connected to the pixel electrode 122 of the pixel unit area 120, and can extend to a vertical trunk (trunk) trace of the pixel electrode 122 of the pixel unit area 120 on the other side. The materials of the first coil 210, the second coil 220, the common metal trace 130, and the pixel electrode 122 include, but are not limited to, metals, metal alloys, transparent conductive materials, or other suitable materials.

It should be noted that, the pixel electrode 122 of the touch display panel 100 of the embodiment preferably adopts a Vertical Alignment (VA) pixel unit structure of 8 domains (domains), and the shared metal trace 130(share _ bar) disposed on the vertical trunk of the pixel electrode 122 leaks the potential of the pixel electrode 122, so that the potential of the pixel electrode 122 is lower than the potential of the pixel electrode 122 on the other side to form a voltage difference, thereby reducing the risk of the vertical crosstalk (V-cross talk), and therefore, the shared metal trace 130 of the embodiment also has the advantages of reducing the space occupation ratio and reducing the parasitic capacitance (parasitic capacitance).

In addition, the touch display panel 100 of the present embodiment further includes a common electrode 126(Acom) stacked on the substrate 110, a gate insulating layer 124 disposed on the common electrode 126(Acom), the shared metal trace 130 and the data line 118 disposed on the gate insulating layer 124, a passivation layer 128 disposed on the shared metal trace 130 and the data line 118, and the pixel electrode 122 disposed on the passivation layer 128. The common electrode 126(Acom) may be formed by a storage capacitor (Cst _ main) of the pixel unit region 120 and an opposite storage electrode (not shown).

Referring to fig. 6 and 7, since the first coil 210 (i.e., the X antenna) and the common metal trace 130 are shared to form a signal multiplexing trace (not shown), a display signal (i.e., a Share _ com signal) and an electromagnetic touch signal need to be resolved in the following manner. In each frame of the display period, an electromagnetic touch period (touch sample point) is performed during a blanking period (blanking period) of the frame (frame) so that the display period and the electromagnetic touch period are not interfered with each other. Specifically, the at least one control circuit 150 further includes a timing switch circuit 152 for receiving a signal Tm of the signal multiplexing trace, and the timing switch circuit 152 determines and outputs a corresponding timing signal, where the timing signal is a display signal when the display period is a high potential and the electromagnetic touch period is a low potential; when the display period is a low potential and the electromagnetic touch period is a high potential, the timing signal is an electromagnetic touch signal. In other words, the control circuit 150 outputs corresponding display data and timing signals to the data lines 118 and outputs timing signals to the scan lines 116, the data lines 118 convert the received display data into gray scale voltages, and output corresponding gray scale voltages to the corresponding data lines 118 according to the timing signals to perform image display refresh.

Similarly, as shown in fig. 8, the timing switch circuit 152 includes, for example, a first switch MOS1 and a second switch MOS2, when the source of the first switch MOS1 is connected to the signal multiplexing trace (i.e. the common metal trace 130) and receives the signal Tm, the drain is used to output the display signal S1; the source of the second switch MOS2 is connected to the signal multiplexing trace and receives the signal Tm, and the drain is used for outputting the electromagnetic touch signal S2. Therefore, the display signal S1 and the electromagnetic touch signal S2 can be controlled by the first switching unit MOS1 and the second switching MOS2, respectively, without affecting/interfering with each other.

In this embodiment, the first coil 210 and the shared metal trace 130 (i.e., the X antenna and the Share _ bar) are shared/multiplexed, that is, on the basis of the circuit integration of the first coil 210 of the electromagnetic touch unit 200 and the pixel electrode 122 of the touch display panel 100, a manufacturing process can be further reduced, the cost is reduced, and the overall yield is improved, so that the electromagnetic touch and display panel is thinned (the thickness is reduced), and the product added value of the touch display panel 100 is increased.

The present invention also provides an electronic device including the touch display panel 100 according to the above embodiment. The electronic device is, for example, a mobile phone, a tablet computer, a notebook computer, a desktop computer, a wearable device, and a smart home, and the invention is not limited thereto. The touch display panel 100 is used for implementing image display and electromagnetic touch sensing, and the display device in the touch display panel 100 is, for example, a liquid crystal display, specifically, the touch display panel 100 is a touch liquid crystal display device, or other suitable type of display device, such as an Electronic Paper Display (EPD) and the like. For the details of the structure, the features, the connection relationship, etc. of the touch display panel 100, please refer to the above embodiments, which are not described herein again.

In view of the foregoing, while the present invention has been described in conjunction with specific embodiments thereof, it is to be understood that many alternatives, modifications, and variations will be apparent to those skilled in the art. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.