阅读说明：本技术 一种适用于Long H触控模式下的GIP电路及其驱动方法 (GIP circuit suitable for Long H touch mode and driving method thereof ) 是由 刘振东 刘汉龙 郑聪秀 于 2021-10-14 设计创作，主要内容包括：本发明公开一种适用于Long H触控模式下的GIP电路及其驱动方法,电路包括晶体管T1、T2、T3、T4、T5、T6、T7、T8、T9和电容C1；当进入Long H触控阶段时,保持VGH和VGL处于高电位,并使得下一级GIP的Q点为高电位,其它GIP信号均为低电位。将该驱动方法与9T1C GIP电路进行搭配,有效的防止了GIP电路在Long H触控模式下GIP电路的Q点漏点问题,提高了面板的显示质量。(The invention discloses a GIP circuit suitable for a Long H touch mode and a driving method thereof, wherein the circuit comprises transistors T1, T2, T3, T4, T5, T6, T7, T8, T9 and a capacitor C1; when entering the Long H touch stage, VGH and VGL are kept at high potential, and the Q point of the next GIP is made to be high potential, and other GIP signals are low potential. The driving method is matched with the 9T1C GIP circuit, so that the problem of Q point leakage of the GIP circuit in the Long H touch mode of the GIP circuit is effectively solved, and the display quality of the panel is improved.)

1. The utility model provides a GIP circuit suitable for under Long H touch-control mode which characterized in that: the circuit comprises transistors T1, T2, T3, T4, T5, T6, T7, T8, T9 and a capacitor C1;

the gate of T1 is connected with Gn-4/STV, the drain of T1 is connected with a point Q, and the source of T1 is connected with VGH;

the gate of T2 is connected with the point Q, the drain of T2 is connected with the point P, and the source of T2 is connected with VGL;

the gate of T3 is connected with the point P, the drain of T3 is connected with the point Q, and the source of T3 is connected with VGL;

the gate of T4 is connected with the Q point, the drain of T4 is connected with Gn, and the source of T4 is connected with CK 1;

the gate of T5 is connected with CK5, the drain of T5 is connected with Gn, and the source of T5 is connected with VGL;

the gate of T6 is connected with the point P, the drain of T6 is connected with Gn, and the source of T6 is connected with VGL;

the gate of T7 is connected Gn +4(RST), the drain of T7 is connected with the point Q, and the source of T7 is connected with VGL;

the grid and the source of T8 are respectively connected with CK1, and the drain of T8 is connected with point P;

the gate of T9 is connected with CK5, the drain of T9 is connected with point P, and the source of T9 is connected with VGL;

one plate of C1 is connected to point Q, and the other plate of C1 is connected to Gn.

2. The GIP circuit in Long H touch mode as claimed in claim 1, wherein: the GIP driving circuit array is arranged on the display panel and is positioned on one side of the display panel.

3. The GIP circuit in Long H touch mode as claimed in claim 1, wherein: the display panel is an OLED display panel or an LCD display panel.

4. The GIP circuit in Long H touch mode as claimed in claim 1, wherein: the driver IC is further included, and Gn-4, Gn and Gn +4 are connected with the driver IC.

5. The GIP circuit in Long H touch mode as claimed in claim 1, wherein: the transistors T1, T2, T3, T4, T5, T6, T7, T8, and T9 are all thin film transistors.

6. A driving method of a GIP circuit adapted to be used in a Long H touch mode, the GIP circuit adapted to be used in a Long H touch mode according to any one of claims 1 to 5, comprising: the method comprises the following steps: when entering the Long H touch stage, VGH and VGL are kept at high potential, and the Q point of the next GIP is made to be high potential, and other GIP signals are low potential.

Technical Field

The invention relates to the technical field of panels, in particular to a GIP circuit suitable for a Long H touch mode and a driving method thereof.

Background

With the development of the times and the progress of the technology, people are increasingly demanding on the appearance of products such as mobile phones, which promotes the continuous development of electronic products towards light weight, thinness and power saving, and the thickness of the products such as mobile phones is effectively reduced by using the In-Cell technology and is more and more widely applied.

Currently, touch technologies are mainly divided into an On-Cell technology and an In-Cell technology: the On Cell is a method for embedding a touch screen between a display screen and a polarizer, namely, a touch sensor is arranged On a display panel; In-Cell means that the touch panel function is embedded into the Array substrate, so that the thickness of the In-Cell panel is reduced to a great extent due to the fact that the thickness of the touch screen is reduced by one layer.

The screen adopting the In-Cell technology has the advantages of lighter product, lower thickness, better light transmission, reduced screen laminating time and improved production efficiency. However, the screen adopting the In-Cell technology has some problems when the screen adopts different modes for touch control. The In-Cell panel is divided into two modes during touch display: the first mode is to divide a frame into a display time period and a touch time period when displaying the frame, i.e. the touch time period is set after the display time period, and the sum of the two time periods is the time of the frame (which we can refer to as Long V); the other is to insert the touch time periods into the display time limit periods in batches when displaying a frame of picture, that is, the touch time periods are divided into display, touch, display, and touch, display in a cyclic manner from top to bottom in the frame of picture (which may be referred to as Long H). When the Long H-mode touch method is performed, since the touch stage is inserted into the display stage, in the panel adopting the GIP design, since a period of touch time is added in the middle of display, Holding time of the Q point of the next GIP is lengthened, so that the Q point has a problem of leakage, and thus the panel may display horizontal stripes.

Disclosure of Invention

The invention aims to provide a GIP circuit suitable for a Long H touch mode and a driving method thereof.

The technical scheme adopted by the invention is as follows:

a GIP circuit suitable for being used in a Long H touch mode comprises transistors T1, T2, T3, T4, T5, T6, T7, T8, T9 and a capacitor C1;

the gate of T1 is connected with Gn-4/STV, the drain of T1 is connected with a point Q, and the source of T1 is connected with VGH;

the gate of T2 is connected with the point Q, the drain of T2 is connected with the point P, and the source of T2 is connected with VGL;

the gate of T3 is connected with the point P, the drain of T3 is connected with the point Q, and the source of T3 is connected with VGL;

the gate of T4 is connected with the Q point, the drain of T4 is connected with Gn, and the source of T4 is connected with CK 1;

the gate of T5 is connected with CK5, the drain of T5 is connected with Gn, and the source of T5 is connected with VGL;

the gate of T6 is connected with the point P, the drain of T6 is connected with Gn, and the source of T6 is connected with VGL;

the gate of T7 is connected Gn +4(RST), the drain of T7 is connected with the point Q, and the source of T7 is connected with VGL;

the grid and the source of T8 are respectively connected with CK1, and the drain of T8 is connected with point P;

the gate of T9 is connected with CK5, the drain of T9 is connected with point P, and the source of T9 is connected with VGL;

one plate of C1 is connected to point Q, and the other plate of C1 is connected to Gn.

Further, the GIP driving circuit array is disposed on the display panel and located at one side of the display panel.

Further, the display panel is an OLED display panel or an LCD display panel.

Furthermore, a driving IC is also included, and Gn-4, Gn and Gn +4 are connected with the driving IC.

Further, the transistors T1, T2, T3, T4, T5, T6, T7, T8, and T9 are all thin film transistors.

When entering a Long H touch stage, VGH and VGL are kept at high potentials, a Q point of the next-stage GIP is made to be at a high potential, and other GIP signals are all at low potentials. The driving method is matched with the 9T1C GIP circuit, so that the problem of Q point leakage of the GIP circuit in the Long H touch mode of the GIP circuit is effectively solved, and the display quality of the panel is improved.

By adopting the technical scheme, the invention provides a novel 9T1C GIP circuit and matches with the corresponding GIP dimming, thereby effectively preventing the problem of Q point leakage of the GIP circuit in the Long H touch mode of the GIP circuit and improving the display quality of the panel.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and the detailed description;

FIG. 1 is a schematic diagram of the working principle of the Long H touch mode;

FIG. 2 is a schematic diagram of a GIP circuit in a Long H touch mode according to the present invention;

FIG. 3 is a schematic diagram of a leakage path of a Q point at the Long H touch stage in the Long H touch mode;

FIG. 4 is a schematic diagram of a generic GIP TIMming of the prior art;

FIG. 5 is a schematic diagram of GIP timing for driving prevention of the GIP circuit in the Long H touch mode according to the present invention;

FIG. 6 is a comparison graph of the prior art timing sequence in the Long H touch mode and the Q-point simulation of the GIP timing of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

The In-Cell panel is divided into two modes during touch display: the first mode is to divide a frame into a display time period and a touch time period when displaying the frame, i.e. the touch time period is set after the display time period, and the sum of the two time periods is the time of the frame (which we can refer to as Long V); the other is to insert the touch time periods into the display time limit periods in batches when displaying a frame of picture, that is, the touch time periods are divided into display, touch, display, and touch, display in a cyclic manner from top to bottom in the frame of picture (which may be referred to as Long H). When the Long H-mode touch method is performed, since the touch stage is inserted into the display stage, in the panel adopting the GIP design, since a period of touch time is added in the middle of display, Holding time of the Q point of the next GIP is lengthened, so that the Q point has a problem of leakage, and thus the panel may display horizontal stripes.

In order to solve the problem, as shown in one of fig. 1 to 6, the present invention discloses a GIP circuit suitable for Long H touch mode, which includes transistors T1, T2, T3, T4, T5, T6, T7, T8, T9 and a capacitor C1;

the gate of T1 is connected with Gn-4/STV, the drain of T1 is connected with a point Q, and the source of T1 is connected with VGH;

the gate of T2 is connected with the point Q, the drain of T2 is connected with the point P, and the source of T2 is connected with VGL;

the gate of T3 is connected with the point P, the drain of T3 is connected with the point Q, and the source of T3 is connected with VGL;

the gate of T4 is connected with the Q point, the drain of T4 is connected with Gn, and the source of T4 is connected with CK 1;

the gate of T5 is connected with CK5, the drain of T5 is connected with Gn, and the source of T5 is connected with VGL;

the gate of T6 is connected with the point P, the drain of T6 is connected with Gn, and the source of T6 is connected with VGL;

the gate of T7 is connected Gn +4(RST), the drain of T7 is connected with the point Q, and the source of T7 is connected with VGL;

the grid and the source of T8 are respectively connected with CK1, and the drain of T8 is connected with point P;

the gate of T9 is connected with CK5, the drain of T9 is connected with point P, and the source of T9 is connected with VGL;

one plate of C1 is connected to point Q, and the other plate of C1 is connected to Gn.

Further, the GIP driving circuit array is disposed on the display panel and located at one side of the display panel.

Further, the display panel is an OLED display panel or an LCD display panel.

Furthermore, a driving IC is also included, and Gn-4, Gn and Gn +4 are connected with the driving IC.

Further, the transistors T1, T2, T3, T4, T5, T6, T7, T8, and T9 are all thin film transistors.

When entering a Long H touch stage, VGH and VGL are kept at high potentials, a Q point of the next-stage GIP is made to be at a high potential, and other GIP signals are all at low potentials. The driving method is matched with the 9T1C GIP circuit, so that the problem of Q point leakage of the GIP circuit in the Long H touch mode of the GIP circuit is effectively solved, and the display quality of the panel is improved.

The following is a detailed description of the specific working principle of the present invention:

FIG. 1 shows Long H touch mode: a Long H touch mode is introduced, namely when a frame of picture is displayed, the panel is divided into a cycle mode from display to touch to display from top to bottom. In GIP timing, CK and other signals in the Long H touch mode are all pulled low during the touch phase, and at this time, the panel does not write display signals any more, and performs a touch operation.

Fig. 2 is a 9T1C GIP circuit proposed by the present invention: in the GIP circuit, the pre-charging module mainly comprises 9 TFTs and 1 capacitor, namely a pre-charging module consisting of T1, an output module consisting of T4 and C1, and a pull-down module consisting of T2/T7. The voltage stabilizing module consists of T3/T5/T6/T8/T9.

Fig. 3 is a Q-point leakage path in Long H touch stage: regardless of the potential of other signals, the possible leakage paths at the point Q are T1/T3/T7 three TFTs (dotted arrows A/B/C in FIG. 3), which will be described in detail below according to the timing diagram.

Figure 4 general GIP timing: in the timing diagram, when the Long H touch stage is entered, except that the Q point of VGH and the next GIP is high, the other GIP signals are low, and the leakage paths existing at the Q point are two paths B and C in fig. 3, that is, the Q point leaks electricity in the VGL direction through T3 and T7, so that the voltage of the Q point is reduced by one time.

FIG. 5 GIP timing proposed by the present invention: in the timing diagram provided by the invention, when entering the Long H touch stage, not only the Q point of VGH and the next stage GIP is high, but also VGL is high in the stage, and other GIP signals are low, because the Q point leakage paths are three paths of T1, T3 and T7 (a/B/C), but the other ends of the three leakage paths are VGH or VGL (both high potentials at this time), the leakage of Q through the three paths is prevented, and the leakage problem of the Q point in the touch stage is solved.

FIG. 6 simulation of Q points of different GIP Timing of Long H touch: under a 9T1C circuit, two GIP dimming Q point simulation results are adopted, and a triangular line part is a voltage doubling holding condition of the Q point at a Long H touch control stage when general GIP dimming is adopted (the voltage drop value of the Q point at the Long H touch control stage is 2.59V); the star-shaped line part is the voltage doubling holding condition of the Q point in the Long H touch control stage when the GIP timing is adopted (the voltage of the Q point is kept unchanged in the Long H touch control stage).

By adopting the technical scheme, the invention provides a novel 9T1C GIP circuit and matches with the corresponding GIP dimming, thereby effectively preventing the problem of Q point leakage of the GIP circuit in the Long H touch mode of the GIP circuit and improving the display quality of the panel.

It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The embodiments and features of the embodiments in the present application may be combined with each other without conflict. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.