A driving method and a touch display panel

Abstract

The present application discloses a driving method and a touch display panel, the method comprising: obtaining all gate lines covering a common electrode block and obtaining a scanning timing of the touch display panel; when the scanning timing scans and covers the first gate line and the last gate line of the current common electrode block, voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block. By detecting the gate line driving timing on the common electrode block in the actual stage and performing low-level voltage compensation on the current common electrode block, the influence of the coupling between the gate line and the common electrode block on the potential is eliminated, thereby solving the problem of horizontal stripes on the display of the touch display panel caused by gate line coupling.

Description

Technical Field

[0001] The present invention relates to the technical field of horizontal stripe processing of touch display screens, and in particular to a driving method and a touch display panel. Background Art

[0002] TDDI (Touch and Display Driver Integration) technology integrates the touch chip and display chip into a single chip. In a touch display panel using TDDI, the common electrode layer is divided into multiple touch units, each of which corresponds to multiple pixel units. Each touch unit is connected to a touch signal transmission line through a touch electrode connection hole, and the touch signal transmission line is connected to the IC.

[0003] Through time-division multiplexing, that is, it is used as a common electrode in the display period to provide a common voltage signal, and is used as a touch electrode in the touch period to provide a touch signal, so as to achieve the effect of touch and display integration.

[0004] Since the common electrode is arranged in blocks, the gate scan line will be coupled to the common electrode in the process of driving the pixel, especially when entering and exiting the common electrode area, there is a non-negligible coupling capacitance between the gate scan line and the common electrode block, and the voltage jump in the gate scan line will affect the potential of the nearby common electrode, causing horizontal stripes to appear on the display screen. Summary of the invention

[0005] In current touch display panels, since the common electrodes are arranged in blocks, when the gate scanning lines scan and drive the pixels, the potential of the common electrode blocks will be affected, resulting in horizontal stripes on the touch display screen.

[0006] In view of the above problems, a driving method and a touch display panel are proposed. By detecting the gate line driving timing on the common electrode block in the actual stage and performing low-level voltage compensation on the current common electrode block, the influence of the coupling between the gate line and the common electrode block on the potential is eliminated, thereby solving the problem of horizontal stripes on the touch display panel caused by gate line coupling.

[0007] In a first aspect, a driving method includes: Acquire all gate lines covering the common electrode block and acquire the scanning timing of the touch display panel; When the scanning sequence scans and covers the first gate line and the last gate line of the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block.

[0008] In combination with the driving method described in the first aspect of the present invention, in a first possible implementation manner, the step of obtaining all gate lines covering the common electrode block and obtaining a scanning timing of the touch display panel includes: Route all gate lines in sequence; Covering each common electrode block with a specified number of gate lines; Acquiring a driving pulse of the scanning timing; The driving pulse is used to sequentially apply high level pulses to the gate lines to turn on the pixels of the gate lines.

[0009] In combination with the first possible implementation of the first aspect of the present invention, in a second possible implementation, when the scanning sequence scans the first gate line and the last gate line of the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block, including: When a high level pulse of the first gate line of the current common electrode block is detected, a pulse width of the high level pulse is acquired; Performing voltage compensation on the current common electrode block: applying a low level pulse with the pulse width to the common electrode block; When a high level pulse of the last gate line of the current common electrode block is detected, a pulse width of the high level pulse is acquired; Performing voltage compensation on the current common electrode block: applying a low level pulse with the pulse width to the common electrode block.

[0010] In a second aspect, a driving method includes: Acquire all gate lines covering the common electrode block and acquire the scanning timing of the touch display panel; When the scanning sequence scans and covers the first gate line of the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block.

[0011] In combination with the driving method described in the second aspect of the present invention, in a first possible implementation manner, the step of obtaining all gate lines covering the common electrode block and obtaining a scanning timing of the touch display panel includes: Route all gate lines in sequence; Covering each common electrode block with a specified number of gate lines; Acquiring a driving pulse of the scanning timing; The driving pulse is used to sequentially apply high level pulses to the gate lines to turn on the pixels of the gate lines.

[0012] In combination with the first possible implementation of the second aspect of the present invention, in a second possible implementation, when the scanning sequence scans the first gate line covering the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block, including: Detect and obtain the high level pulse of the first gate line of the current common electrode block; Performing voltage compensation on the current common electrode block: applying a low level pulse to the common electrode block until the gate line covering the current common electrode block is completely scanned.

[0013] In a third aspect, a touch display panel adopts the driving method described in the first aspect and the second aspect, comprising: An acquisition module, used to cover all gate lines of the common electrode block and acquire the scanning timing of the touch display panel; The compensation module is used to perform low-level pulse voltage compensation on the current common electrode block according to the scanning timing to eliminate the influence of coupling on the potential of the current common electrode block.

[0014] In conjunction with the touch display panel described in the third aspect, in a first possible implementation manner, the compensation module includes: The first compensation unit is used to apply a low level pulse to the common electrode block with a pulse width of the high level pulse when a high level pulse of a first gate line of the current common electrode block is detected.

[0015] In combination with the first possible implementation manner of the third aspect, in a second possible implementation manner, the compensation module further includes: The second compensation unit is used to apply a low level pulse with a pulse width of the high level pulse to the common electrode block when a high level pulse of the last gate line of the current common electrode block is detected.

[0016] In combination with the touch display panel of the third aspect, in a third possible implementation manner, the compensation module further includes: The third compensation unit is used to perform voltage compensation on the current common electrode block when a high level pulse of the first gate line of the current common electrode block is detected: a low level pulse is applied to the common electrode block until the gate lines covering the current common electrode block are scanned.

[0017] Compared with the prior art, the embodiments of the present application mainly have the following technical effects: by detecting the gate line driving timing on the common electrode block in the actual stage and performing low-level voltage compensation on the current common electrode block, the influence of the coupling between the gate line and the common electrode block on the potential is eliminated, thereby solving the problem of horizontal stripes on the touch display panel caused by gate line coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the electrode block layout of an existing touch display screen; Figure 2 It is a schematic diagram of the wiring of the gate lines in the touch display screen of the present application; Figure 3 is a schematic diagram of the scanning timing in Example 1 of the present application; Figure 4 is a schematic diagram of the scanning timing in Example 2 of the present application; Figure 5 A flowchart of an embodiment of a driving method of the present application; Figure 6 yes Figure 5 A flowchart of a specific implementation of S100; Figure 7 yes Figure 5 A flowchart of a specific implementation of S200; Figure 8 A flowchart of another embodiment of a driving method of the present application; Fig. 9 Figure 8 A flowchart of a specific implementation of S400; Fig.10 It is a structural schematic diagram of an embodiment of a touch display panel of the present application. DETAILED DESCRIPTION

[0020] 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.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] Today's touch display panels, such as Figure 1 , Figure 1 This is a schematic diagram of the electrode block layout of an existing touch display screen; since the common electrode is arranged in blocks, when the gate scan line scans and drives the pixels, it will affect the potential of the common electrode block, resulting in horizontal stripes on the touch display screen.

[0025] In view of the above problems, a driving method and a touch display panel are proposed.

[0026] In the first aspect, a driving method, such as Figure 5 , Figure 5 A flowchart of an embodiment of a driving method of the present application; comprising: S100, acquiring all gate lines covering a common electrode block and acquiring a scanning timing of a touch display panel.

[0027] In a preferred embodiment, Figure 6 , Figure 6 yes Figure 5 A flowchart of a specific implementation of S100; S100 includes: S110, wiring all gate lines in sequence; S120, covering each common electrode block with a specified number of gate lines; S130, obtaining a driving pulse of a scanning sequence; S140, using the driving pulse to sequentially apply a high-level pulse to the gate line to turn on the pixels of the gate line.

[0028] In this embodiment, if Figure 2 , Figure 2It is a wiring diagram of the gate lines in the touch display screen of the present application; when wiring, the gate lines (G1, ..., Gn) are evenly wired so that the number of gate lines covering each common electrode block (RX1, ..., RXn) is equal, which can be 50 (G1, ..., G50). When scanning the gate lines, they can be scanned line by line and forward sequentially, that is, high-level pulses are applied to the gate lines in turn to drive the pixels.

[0029] S200 , when the scanning sequence scans and covers the first gate line and the last gate line of the current common electrode block, voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block.

[0030] In a preferred embodiment, Figure 7 , Figure 7 yes Figure 5 A flowchart of a specific implementation method of S200; S200 includes: S210, when a high-level pulse of the first gate line of the current common electrode block is detected, the pulse width of the high-level pulse is obtained; S220, voltage compensation is performed on the current common electrode block: a low-level pulse is applied to the common electrode block with the pulse width; S230, when a high-level pulse of the last gate line of the current common electrode block is detected, the pulse width of the high-level pulse is obtained; S240, voltage compensation is performed on the current common electrode block: a low-level pulse is applied to the common electrode block with the pulse width.

[0031] In this embodiment, if Figure 3 , Figure 3 It is a schematic diagram of the scanning timing in Example 1 of the present application; the high-level pulse of the scanning timing is detected, and when the first high-level pulse of the gate line of the common electrode block is detected, the common electrode block is compensated with a low-level voltage pulse, and the pulse width of the low-level voltage pulse can be equal to the width of the first high-level pulse. Similarly, when the 50th high-level pulse of the gate line of the common electrode block is detected, the common electrode block is compensated with a low-level voltage pulse, and the pulse width of the low-level voltage pulse can be equal to the width of the 50th high-level pulse. By detecting the gate line drive timing on the common electrode block in the actual stage and performing low-level voltage compensation on the current common electrode block, the influence of the coupling between the gate line and the common electrode block on the potential is eliminated, thereby solving the problem of horizontal stripes on the touch display panel caused by gate line coupling.

[0032] In the second aspect, a driving method, such as Figure 8 , Figure 8 A flowchart of another embodiment of a driving method of the present application; comprising: S300, acquiring all gate lines covering the common electrode block and acquiring a scanning timing of the touch display panel.

[0033] In a preferred embodiment, S300 includes S310, wiring all gate lines in sequence; S320, covering each common electrode block with a specified number of gate lines; S330, obtaining a driving pulse of a scanning sequence; S340, using the driving pulse to apply a high-level pulse to the gate lines in sequence to turn on the pixels of the gate lines.

[0034] In this embodiment, if Figure 2 , Figure 2 It is a wiring diagram of the gate lines in the touch display screen of the present application; when wiring, the gate lines (G1, ..., Gn) are evenly wired so that the number of gate lines covering each common electrode block (RX1, ..., RXn) is equal, which can be 50 (G1, ..., G50). When scanning the gate lines, they can be scanned line by line and forward sequentially, that is, high-level pulses are applied to the gate lines in turn to drive the pixels.

[0035] S400 , when the scanning sequence scans and covers the first gate line of the current common electrode block, voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block.

[0036] In a preferred embodiment, Fig. 9 , Fig. 9 Figure 8 A flowchart of a specific implementation of S400; S400 includes: S410, detecting and acquiring a high level pulse of the first gate line of the current common electrode block; S420, performing voltage compensation on the current common electrode block: applying a low level pulse to the common electrode block until the gate lines covering the current common electrode block are scanned.

[0037] In this embodiment, if Figure 4 , Figure 4 This is a schematic diagram of the scanning timing in Example 2 of the present application; the high-level pulse of the scanning timing is detected, and when the first high-level pulse of the gate line of the common electrode block is detected, the common electrode block is compensated with a low-level voltage pulse, and the pulse width of the low-level voltage pulse is equal to the sum of the pulse widths of all the gate lines of the common electrode block, that is, until the gate line of the current common electrode block is scanned. By detecting the gate line drive timing on the common electrode block in the actual stage and performing low-level voltage compensation on the current common electrode block, the influence of the coupling between the gate line and the common electrode block on the potential is eliminated, and the display stripe problem of the touch display panel caused by the gate line coupling is solved.

[0038] In a third aspect, a touch display panel 500 is provided. Fig.10 , Fig.101 is a schematic diagram of a structure of an embodiment of a touch display panel 500 of the present application. The driving method of the first aspect and the second aspect is adopted, including an acquisition module 501, which is used to cover all gate lines of the common electrode block and obtain the scanning timing of the touch display panel; and a compensation module 502, which is used to perform low-level pulse voltage compensation on the current common electrode block according to the scanning timing to eliminate the influence of coupling on the potential of the current common electrode block.

[0039] Preferably, the compensation module comprises: a first compensation unit for applying a low level pulse with a pulse width of the high level pulse to the common electrode block when a high level pulse of a first gate line of the current common electrode block is detected.

[0040] Preferably, the compensation module further comprises: a second compensation unit for applying a low level pulse with a pulse width of the high level pulse to the common electrode block when a high level pulse of the last gate line of the current common electrode block is detected.

[0041] Preferably, the compensation module also includes: a third compensation unit, which is used to perform voltage compensation on the current common electrode block when a high-level pulse of the first gate line of the current common electrode block is detected: a low-level pulse is applied to the common electrode block until the gate line covering the current common electrode block is scanned.

[0042] Compared with the prior art, the embodiments of the present application mainly have the following technical effects: by detecting the gate line driving timing on the common electrode block in the actual stage and performing low-level voltage compensation on the current common electrode block, the influence of the coupling between the gate line and the common electrode block on the potential is eliminated, thereby solving the problem of horizontal stripes on the touch display panel caused by gate line coupling.

[0043] 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 driving method, characterized in that it includes: Acquire all gate lines covering the common electrode block and acquire the scanning timing of the touch display panel; When the scanning sequence scans and covers the first gate line and the last gate line of the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block.

2. The driving method according to claim 1, characterized in that: The method of obtaining all gate lines covering the common electrode block and obtaining the scanning timing of the touch display panel includes: Route all gate lines in sequence; Covering each common electrode block with a specified number of gate lines; Acquiring a driving pulse of the scanning timing; The driving pulse is used to sequentially apply high level pulses to the gate lines to turn on the pixels of the gate lines.

3. The driving method according to claim 2, characterized in that: When the scanning sequence scan covers the first gate line and the last gate line of the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block, including: When a high level pulse of the first gate line of the current common electrode block is detected, a pulse width of the high level pulse is acquired; Performing voltage compensation on the current common electrode block: applying a low level pulse with the pulse width to the common electrode block; When a high level pulse of the last gate line of the current common electrode block is detected, a pulse width of the high level pulse is acquired; Performing voltage compensation on the current common electrode block: applying a low level pulse with the pulse width to the common electrode block.

4. A driving method, characterized in that: include: Acquire all gate lines covering the common electrode block and acquire the scanning timing of the touch display panel; When the scanning sequence scans and covers the first gate line of the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block.

5. The driving method according to claim 4, characterized in that: The method of obtaining all gate lines covering the common electrode block and obtaining the scanning timing of the touch display panel includes: Route all gate lines in sequence; Covering each common electrode block with a specified number of gate lines; Acquiring a driving pulse of the scanning timing; The driving pulse is used to sequentially apply high level pulses to the gate lines to turn on the pixels of the gate lines.

6. The driving method according to claim 5, characterized in that: When the scanning sequence scans the first gate line covering the current common electrode block, low-level voltage compensation is performed on the current common electrode block to eliminate the influence of coupling on the potential of the current common electrode block, including: Detect and obtain the high level pulse of the first gate line of the current common electrode block; Performing voltage compensation on the current common electrode block: applying a low level pulse to the common electrode block until the gate line covering the current common electrode block is completely scanned.

7. A touch display panel, using the driving method according to any one of claims 1 to 6, characterized in that: include: An acquisition module, used to cover all gate lines of the common electrode block and acquire the scanning timing of the touch display panel; The compensation module is used to perform low-level pulse voltage compensation on the current common electrode block according to the scanning timing to eliminate the influence of coupling on the potential of the current common electrode block.

8. The touch display panel according to claim 7, characterized in that: The compensation module comprises: The first compensation unit is used to apply a low level pulse to the common electrode block with a pulse width of the high level pulse when a high level pulse of a first gate line of the current common electrode block is detected.

9. The touch display panel according to claim 8, characterized in that: The compensation module also includes: The second compensation unit is used to apply a low level pulse with a pulse width of the high level pulse to the common electrode block when a high level pulse of the last gate line of the current common electrode block is detected.

10. The touch display panel according to claim 9, characterized in that: The compensation module also includes: The third compensation unit is used to perform voltage compensation on the current common electrode block when a high level pulse of the first gate line of the current common electrode block is detected: a low level pulse is applied to the common electrode block until the gate lines covering the current common electrode block are scanned.

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