A touch display scanning method and touch display screen

Abstract

The present invention discloses a touch display scanning method and a touch display screen, comprising: performing gate drive scanning row by row in the first stage of a first timing cycle; corresponding to the first stage of the first timing cycle, setting the effective display output drive of the gate drive in the first stage of the second timing cycle to a high level; performing gate drive scanning row by row and touch scanning row by row in the second stage of the first timing cycle; corresponding to the second stage of the first timing cycle, setting the effective display output drive of the gate drive in the second stage of the second timing cycle to a low level. The effective display area of ​​the touch display screen includes a display scanning partition, a touch scanning partition, a plurality of gate drive scanning lines, a pixel gate drive unit, and a drive output unit. The implementation of the present invention avoids leakage caused by the pixel gate drive unit being in a paused state during the original touch scanning stage, and the appearance of horizontal stripes on the display.

Description

Technical Field

[0001] The present invention relates to the technical field of touch display screen scanning, and in particular to a touch display scanning method and a touch display screen. Background Art

[0002] In the initial stage of the development of touch display, the touch display panel is made by laminating a touch panel and a display panel to realize touch display. The touch panel and the display panel need to be prepared separately, which is costly, thick, and has low production efficiency.

[0003] With the development of touch display integration technology, the common electrode of the touch display panel can be used as the touch sensing electrode for touch detection. By time-sharing driving and time-sequential touch control and display control, touch and display functions can be realized at the same time. In this way, the touch sensing electrode is directly integrated into the display panel, which greatly reduces the production cost, improves production efficiency, and reduces the thickness of the panel.

[0004] When the common electrodes are reused as touch sensing electrodes, the common electrode layer needs to be divided into multiple electrode blocks. At the same time, in order to realize the time-sharing control of touch and display, each electrode block needs to provide a voltage signal through a separate wiring, through which a touch sensing signal is provided to the corresponding electrode block in the touch timing, and a common voltage signal is provided to the corresponding electrode block in the display timing.

[0005] Although the existing touch display panel can realize the touch function and the display function, the screen display thereof may have horizontal stripes.

[0006] Chinese patent CN 104699319 B discloses a driving method for a touch display panel to solve the problem of horizontal stripes. The method includes: in a display driving timing section, providing a first voltage signal to an electrode block to provide a common electrode layer to realize display control; in a touch driving timing section, providing a second voltage signal to the electrode block to realize touch detection through the common electrode layer; the display driving timing section and the touch driving timing section are performed alternately.

[0007] However, in this alternating driving mode, in one cycle, assuming that the gate is driven to G100, then touch scanning is performed, and after the touch is completed, the gate drive of the G101 row is performed. During the touch stage, the gate drive is in a paused state until the touch scanning stage ends and then the drive output of the next row of gate scanning is performed. Due to the paused state, the holding circuit module unit in the GOA unit will leak electricity, and horizontal stripes will still appear at the beginning and end of the touch scan. Summary of the invention

[0008] The existing touch display alternately performs scanning mode, which causes leakage of the holding circuit of the GOA unit, resulting in the occurrence of horizontal stripes at the beginning and end of the touch scanning.

[0009] In view of the above problems, a touch display scanning method and a touch display screen are proposed. During the touch scanning stage, the gate drive scanning line continues to scan, and the display output is controlled by controlling the switch of the display control transistor, thereby avoiding leakage caused by the pixel gate drive unit being in a pause state during the original touch scanning stage, and the occurrence of horizontal stripes on the display.

[0010] In a first aspect, a touch display scanning method includes:

[0011] Step 100, performing a first gate drive scan row by row in a first phase of a first timing cycle;

[0012] Step 200, corresponding to the first stage of the first timing cycle, setting the effective display output drive of the gate drive in the first stage of the second timing cycle to a high level;

[0013] Step 300, performing gate drive scanning and touch scanning row by row in the second phase of the first timing cycle;

[0014] Step 400, corresponding to the second stage of the first timing cycle, setting the effective display output drive of the gate drive in the second stage of the second timing cycle to a low level;

[0015] Step 500, repeating steps 100-400 to perform periodic touch display scanning;

[0016] The gate drive scan and the touch scan in step 300 are performed simultaneously.

[0017] In conjunction with the touch display scanning method of the present invention, in a first possible implementation manner, step 100 includes:

[0018] Step 110, connecting the pixel gate driving unit to the drain of the display control transistor;

[0019] Step 120, connecting the gate of the display control transistor to a level enabling unit;

[0020] Step 130: Connect the source of the display control transistor to the row scan line.

[0021] In combination with the first possible implementation manner of the present invention, in a second possible implementation manner, step 200 includes:

[0022] Step 210, making a one-to-one correspondence between the first phase of the first timing cycle and the first phase of the second timing cycle;

[0023] Step 220 : In the first phase of the second timing cycle, the level enabling unit outputs a high level to the gate of the display control transistor, so that the display control transistor is turned on.

[0024] In combination with the second possible implementation manner of the present invention, in a third possible implementation manner, step 100 further includes:

[0025] Step 140, transmitting a scan instruction to a pixel gate driving unit via a scan line;

[0026] Step 150: The pixel gate driving unit drives the display through the display control transistor output.

[0027] In combination with the touch display scanning method of the present invention, in a fourth possible implementation manner, step 300 includes:

[0028] Step 310, connecting the pixel gate driving unit to the drain of the display control transistor;

[0029] Step 320, connecting the gate of the display control transistor to a level enabling unit;

[0030] Step 330: Connect the source of the display control transistor to the row scan line.

[0031] In combination with the fourth possible implementation manner of the present invention, in a fifth possible implementation manner, step 400 includes:

[0032] Step 410, making a one-to-one correspondence between the second phase of the first timing cycle and the second phase of the second timing cycle;

[0033] Step 420 : In the second phase of the second timing cycle, the level enabling unit outputs a high level to the gate of the display control transistor, so that the display control transistor is turned off.

[0034] In combination with the fifth possible implementation manner of the present invention, in a sixth possible implementation manner, step 300 further includes:

[0035] Step 340, transmitting a scan instruction to a pixel gate driving unit via a scan line;

[0036] Step 350: the pixel gate driving unit performs a second gate driving scan row by row;

[0037] The first scanning line of the second gate driving scan is continuous with the last scanning line of the first gate driving scan.

[0038] In a second aspect, a touch display screen is provided with an effective display area, and the scanning method described in the first aspect is used to perform gate drive scanning and touch scanning on the effective display area, and the effective display area includes:

[0039] Display scan partitions;

[0040] Touch scan partition;

[0041] A plurality of gate drive scan lines;

[0042] Pixel gate driving unit;

[0043] Drive output unit;

[0044] The display scanning subareas and the touch scanning subareas are alternately arranged on the effective display area;

[0045] The gate drive scanning lines are arranged sequentially on the effective display area;

[0046] The pixel gate driving unit is connected to the gate driving scanning line through the driving output unit;

[0047] The driving output unit is used to control the driving output display of the pixel gate driving unit.

[0048] In conjunction with the touch display screen described in the second aspect of the present invention, in a first possible implementation manner, the drive output unit includes:

[0049] Display control transistor;

[0050] Level enable unit;

[0051] The pixel gate driving unit is connected to the drain of the display control transistor;

[0052] The gate of the display control transistor is connected to the level enabling unit;

[0053] The source of the display control transistor is connected to the gate drive scanning line.

[0054] In combination with the first possible implementation manner of the second aspect of the present invention, in a second possible implementation manner, the drive output unit further includes:

[0055] Control unit;

[0056] The control unit is used to send a level output instruction to the level enabling unit according to the stage of the first timing cycle, and output a high level / low level to control the on / off of the display control transistor.

[0057] A touch display scanning method and a touch display screen described in the present invention are implemented. During the touch scanning stage, the gate drive scanning line continues to scan, and the display output is controlled by controlling the switch of the display control transistor, thereby avoiding leakage caused by the pixel gate driving unit being in a paused state during the original touch scanning stage, and the appearance of horizontal stripes on the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0059] Figure 1 is a schematic diagram of a first embodiment of a touch display scanning method in the present invention;

[0060] Figure 2 is a schematic diagram of a second embodiment of the touch display scanning method of the present invention;

[0061] Figure 3 is a schematic diagram of a third embodiment of the touch display scanning method of the present invention;

[0062] Figure 4 is a schematic diagram of a fourth embodiment of a touch display scanning method in the present invention;

[0063] Figure 5 is a schematic diagram of a fifth embodiment of a touch display scanning method in the present invention;

[0064] Figure 6 is a schematic diagram of a sixth embodiment of a touch display scanning method in the present invention;

[0065] Figure 7 is a schematic diagram of a seventh embodiment of the touch display scanning method of the present invention;

[0066] Figure 8 This is a schematic diagram of effective partitions of the touch display screen in the present invention;

[0067] Fig. 9 It is a schematic diagram of the connection principle of the gate drive unit circuit of the touch display screen in the present invention;

[0068] Fig.10 It is a schematic diagram of the driving timing in the present invention. DETAILED DESCRIPTION

[0069] The following will be combined with the accompanying drawings in the invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0071] The existing touch display alternately performs scanning mode, which causes leakage of the holding circuit of the GOA unit, resulting in the occurrence of horizontal stripes at the beginning and end of the touch scanning.

[0072] The existing driving method is that in one cycle, assuming that the gate is driven to G100, then touch scanning is performed, and after the touch is completed, the gate drive of the G101 row is performed. The gate drive is in a paused state during the touch stage, and the drive output of the next row of gate scanning is continued after the touch scanning stage is completed. However, due to the paused state, the holding circuit module unit in the GOA unit will leak electricity, resulting in horizontal stripes on the display when the touch starts and ends.

[0073] In view of the above problems, a touch display scanning method and a touch display screen are proposed.

[0074] Example 1

[0075] like Figure 1 , Figure 1 1 is a schematic diagram of a first embodiment of a touch display scanning method in the present invention, a touch display scanning method, comprising: step 100, performing a first gate drive scan row by row in a first phase of a first timing cycle; step 200, corresponding to the first phase of the first timing cycle, setting the effective display output drive of the gate drive in the first phase of the second timing cycle to a high level; step 300, performing gate drive scan row by row and touch scan row by row in a second phase of the first timing cycle; step 400, corresponding to the second phase of the first timing cycle, setting the effective display output drive of the gate drive in the second phase of the second timing cycle to a low level; step 500, repeating steps 100-400 to perform periodic touch display scanning; wherein the gate drive scan in step 300 is performed simultaneously with the touch scan.

[0076] like Fig.10 , Fig.10It is a schematic diagram of the driving timing in the present invention; the first timing period is the timing period of the gate driving scan and the touch scanning, indicating the working timing of the driving scan and the touch scanning.

[0077] The second timing cycle is the working timing of the level enabling unit EN that controls the gate drive output display.

[0078] The first timing cycle and the second timing cycle are timing cycles that are performed simultaneously.

[0079] The first stage of the first timing cycle is the gate drive scanning stage. At this time, the driver (level enable unit EN) that controls the effective display output is set to a high level, that is, effective display output is performed in this stage.

[0080] In the second stage of the first timing cycle, the gate drive scan is also performed at the same time, but the drive (level enable unit EN) that controls the effective display output is at a low level at this time, that is, no display output is performed. By making the gate drive scan line continue to scan during the touch scan stage, and controlling the display output by controlling the switch of the display control transistor, it is avoided that the pixel gate drive unit is in a paused state during the original touch scan stage to generate leakage and the appearance of horizontal stripes on the display is avoided.

[0081] Example 2

[0082] like Figure 2 and Fig. 9 , Figure 2 It is a schematic diagram of the second embodiment of the touch display scanning method in the present invention, and step 100 includes: step 110, connecting the pixel gate driving unit to the drain of the display control transistor; step 120, connecting the gate of the display control transistor to the level enabling unit EN; step 130, connecting the source of the display control transistor to the row scanning line.

[0083] Preferably, if Figure 3 , Figure 3 It is a schematic diagram of the third embodiment of the touch display scanning method in the present invention, step 200 includes: step 210, one-to-one correspondence between the first stage of the first timing cycle and the first stage of the second timing cycle; step 220, in the first stage of the second timing cycle, outputting a high level to the gate of the display control transistor through the level enable unit EN, so that the display control transistor is turned on.

[0084] Preferably, if Figure 4 , Figure 4 It is a schematic diagram of the fourth embodiment of the touch display scanning method in the present invention, and step 100 also includes: step 140, transmitting a scanning instruction to a pixel gate driving unit via a scanning line; step 150, the pixel gate driving unit drives the display via a display control transistor output.

[0085] Preferably, if Figure 5 , Figure 5 It is a schematic diagram of the fifth embodiment of the touch display scanning method in the present invention; step 300 includes step 310, connecting the pixel gate driving unit to the drain of the display control transistor; step 320, connecting the gate of the display control transistor to the level enable unit EN; step 330, connecting the source of the display control transistor to the row scan line.

[0086] Preferably, if Figure 6 , Figure 6 It is a schematic diagram of the sixth embodiment of the touch display scanning method in the present invention; step 400 includes: step 410, one-to-one correspondence between the second stage of the first timing cycle and the second stage of the second timing cycle; step 420, in the second stage of the second timing cycle, outputting a high level to the gate of the display control transistor through the level enable unit EN, so that the display control transistor is turned off.

[0087] Preferably, if Figure 7 , Figure 7 It is a schematic diagram of the seventh embodiment of the touch display scanning method in the present invention; step 300 also includes: step 340, transmitting a scanning instruction to the pixel gate driving unit through the scanning line; step 350, the pixel gate driving unit performs a second gate driving scan line by line; wherein, the first scanning line of the second gate driving scan is continuous with the last scanning line of the first gate driving scan.

[0088] Scanning principles in this application:

[0089] Please refer to Figure 8-10 In one cycle, the ① display stage is performed first, followed by the ② touch stage. At this time, the gate drive is not in a paused state, but continues to scan downward. That is, assuming that after the ① stage, the gate drive reaches the G100th row, and the ② stage gate is G101 row, G102 row, and keeps scanning. At this time, the touch is also scanned, but the gate scan line, that is, the line connecting the AA effective display area, is in the VGL low level state. In the touch stage, EN is set to a low level, so the gate can only continue to pass downward, but cannot be output to the Gate X scan line. Wait until the touch stage is over before switching to the display stage. Assuming that the touch has ended, the gate scan has reached the ③ stage. At this time, the gate outputs the G200 row, and EN switches from a low level to a high level. Gate X, that is, the gate output to the scan line, can output a high level, which avoids the original touch stage. The gate is in a paused state and generates leakage, resulting in the display horizontal stripe phenomenon.

[0090] Similarly, the cycle can be repeated, that is, the display stages are ①③⑤. Referring to a cycle timing, the next cycle will scan and drive the previous gate ②④ that was not scanned.

[0091] Example 3

[0092] like Figure 8 and 9 , Figure 8 is a schematic diagram of effective partitions of the touch display screen in the present invention, Fig. 9 The present invention is a schematic diagram of the circuit connection principle of the gate drive unit of the touch display screen in the present invention; a touch display screen, the touch display screen is provided with an effective display area, the scanning method of the first aspect is used to perform gate drive scanning and touch scanning on the effective display area, the effective display area includes a display scanning partition, a touch scanning partition, a plurality of gate drive scanning lines, a pixel gate drive unit, and a drive output unit; the display scanning partition and the touch scanning partition are alternately arranged on the effective display area; the gate drive scanning lines are arranged in sequence on the effective display area; the pixel gate drive unit is connected to the gate drive scanning line through the drive output unit; the drive output unit is used to control the drive output display of the pixel gate drive unit.

[0093] Preferably, the drive output unit includes a display control transistor and a level enabling unit; the pixel gate driving unit is connected to the drain of the display control transistor; the gate of the display control transistor is connected to the level enabling unit; and the source of the display control transistor is connected to the gate driving scanning line.

[0094] Preferably, the drive output unit further includes a control unit; the control unit is used to send a level output instruction to the level enabling unit according to the stage of the first timing cycle, and output a high level / low level to perform on / off control on the display control transistor.

[0095] A touch display scanning method and a touch display screen described in the present invention are implemented. During the touch scanning stage, the gate drive scanning line continues to scan, and the display output is controlled by controlling the switch of the display control transistor, thereby avoiding leakage caused by the pixel gate driving unit being in a paused state during the original touch scanning stage, and the appearance of horizontal stripes on the display.

[0096] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A touch display scanning method, characterized in that: include: Step 100, performing a first gate drive scan row by row in a first phase of a first timing cycle; Step 200, corresponding to the first stage of the first timing cycle, setting the effective display output drive of the gate drive in the first stage of the second timing cycle to a high level; Step 300, performing gate drive scanning and touch scanning row by row in the second phase of the first timing cycle; Step 400, corresponding to the second stage of the first timing cycle, setting the effective display output drive of the gate drive in the second stage of the second timing cycle to a low level; Step 500, repeating steps 100-400 to perform periodic touch display scanning; Wherein, the gate drive scanning and the touch scanning in step 300 are performed simultaneously; The first timing cycle is a timing cycle of gate drive scanning and touch scanning, indicating the working timing of drive scanning and touch scanning; The second timing cycle is the working timing of the level enabling unit EN that controls the gate drive output display; The first timing cycle and the second timing cycle are timing cycles that are performed simultaneously; The first stage of the first timing cycle is a gate drive scanning stage, at which the drive for controlling the effective display output is set to a high level, that is, effective display output is performed in this stage; In the touch scanning stage of the second stage of the first timing cycle, the gate drive scan is also carried out simultaneously. At this time, the drive of the effective display output is controlled to be a low level, that is, no display output is performed; during the touch scanning stage, the gate drive scan line continues to scan, and its display output is controlled by controlling the switch of the display control transistor.

2. The touch display scanning method according to claim 1, characterized in that: The step 100 comprises: Step 110, connecting the pixel gate driving unit to the drain of the display control transistor; Step 120, connecting the gate of the display control transistor to a level enabling unit; Step 130: Connect the source of the display control transistor to the row scan line.

3. The touch display scanning method according to claim 2, characterized in that: The step 200 comprises: Step 210, making a one-to-one correspondence between the first phase of the first timing cycle and the first phase of the second timing cycle; Step 220 : In the first phase of the second timing cycle, the level enabling unit outputs a high level to the gate of the display control transistor, so that the display control transistor is turned on.

4. The touch display scanning method according to claim 3, characterized in that: The step 100 further includes: Step 140, transmitting a scan instruction to a pixel gate driving unit via a scan line; Step 150: The pixel gate driving unit drives the display through the display control transistor output.

5. The touch display scanning method according to claim 1, characterized in that: The step 300 includes: Step 310, connecting the pixel gate driving unit to the drain of the display control transistor; Step 320, connecting the gate of the display control transistor to a level enabling unit; Step 330: Connect the source of the display control transistor to the row scan line.

6. The touch display scanning method according to claim 5, characterized in that: The step 400 includes: Step 410, making a one-to-one correspondence between the second phase of the first timing cycle and the second phase of the second timing cycle; Step 420 : In the second phase of the second timing cycle, the level enabling unit outputs a high level to the gate of the display control transistor, so that the display control transistor is turned off.

7. The touch display scanning method according to claim 6, characterized in that: The step 300 further includes: Step 340, transmitting a scan instruction to a pixel gate driving unit via a scan line; Step 350: the pixel gate driving unit performs a second gate driving scan row by row; The first scanning line of the second gate driving scan is continuous with the last scanning line of the first gate driving scan.

8. A touch display screen, the touch display screen being provided with an effective display area, the scanning method according to any one of claims 1 to 7 being used to perform gate drive scanning and touch scanning on the effective display area, the effective display area comprising: Display scan partitions; Touch scan partition; A plurality of gate drive scan lines; Pixel gate driving unit; Drive output unit; The display scanning subareas and the touch scanning subareas are alternately arranged on the effective display area; The gate drive scanning lines are arranged sequentially on the effective display area; The pixel gate driving unit is connected to the gate driving scanning line through the driving output unit; The driving output unit is used to control the driving output display of the pixel gate driving unit.

9. The touch display screen according to claim 8, characterized in that: The drive output unit comprises: Display control transistor; Level enable unit; The pixel gate driving unit is connected to the drain of the display control transistor; The gate of the display control transistor is connected to the level enabling unit; The source of the display control transistor is connected to the gate drive scanning line.

10. The touch display screen according to claim 9, characterized in that: The drive output unit also includes: Control unit; The control unit is used to send a level output instruction to the level enabling unit according to the stage of the first timing cycle, and output a high level / low level to control the on / off of the display control transistor.

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