Display method and display device for eliminating transverse grains of embedded touch panel and storage medium

Abstract

The embodiment of the invention discloses a display method for eliminating transverse stripes of an embedded touch panel, a display device and a storage medium. The method for eliminating the horizontal grain display of the embedded touch panel comprises the following steps: determining the voltage drop of each column of source electrode data lines in a touch control stage, and performing gray scale voltage compensation on pixel units of a display row according to the voltage drop of each column of source electrode data lines. According to the scheme, the situations of display line electric leakage before the touch control stage, insufficient charging of display line sub-pixels after the touch control stage, attenuation of signals in the transmission process due to insufficient TDDI driving capacity and the like can be improved, so that the problem of display cross grains of the embedded touch control panel is solved, and the display image quality of the embedded touch control panel is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of display panels, and in particular, to a method for eliminating horizontal stripes in an in-cell touch panel, a display device, and a storage medium. Background Art

[0002] Currently, in-cell touch panels generally adopt the Long Horizontal Blank (LHB) technology of Touch and Display Driver Integration (TDDI) for in-frame touch detection. In TDDI control, the LHB scanning method alternates between touch and display time-sharing, that is, after scanning a certain number of rows for display, partial touch scanning is inserted, and this alternating scanning method is used. Obviously, TDDI needs to process touch and display signals simultaneously. Once the driving ability of TDDI is insufficient, the signals will attenuate or distort during transmission, making it difficult to provide stable and accurate driving signals to each pixel, resulting in an unstable display state of the pixels and thus possibly generating abnormal horizontal stripes on the screen. In addition, abnormal horizontal stripes on the screen may also be caused by leakage of the display rows before the touch stage and / or insufficient charging of the sub-pixels in the display rows after the touch stage. Summary of the Invention

[0003] The embodiments of the present invention provide a method for eliminating horizontal stripes in an in-cell touch panel, a display device, and a storage medium to solve the problem of horizontal stripe display in the in-cell touch panel.

[0004] In a first aspect, the embodiments of the present invention provide a method for eliminating horizontal stripes in an in-cell touch panel, and the method for eliminating horizontal stripes in the in-cell touch panel includes:

[0005] Determine the voltage drop of each column of source data lines during the touch stage, and perform grayscale voltage compensation on the pixel units of the display rows according to the voltage drop of each column of the source data lines.

[0006] Optionally, determining the voltage drop of each column of the source data lines includes:

[0007] Obtain the first voltage of each column of the source data lines at the start of the touch stage;

[0008] Obtain the second voltage of each column of the source data lines at a preset fixed time after the start of the touch stage;

[0009] Determine the voltage drop according to the first voltage and the second voltage.

[0010] Optionally, performing grayscale voltage compensation on the pixel units of the display rows according to the voltage drop of each column of the source data lines includes:

[0011] Determine the source compensation data corresponding to each pixel unit of the display row according to the voltage drop of the source data line described in each column, and output the source compensation data through the source data line connected to each pixel unit, so as to perform grayscale voltage compensation on each pixel unit of the display row.

[0012] Optionally, after outputting the source compensation data through the source data line connected to each pixel unit, it further includes:

[0013] Obtain the third voltage of the source data line in each column;

[0014] If there is a situation where the third voltage of the source data line is not equal to its corresponding first voltage, determine an adjustment voltage according to the first voltage and the third voltage corresponding to the source data line, and adjust the source compensation data output by the source data line according to the adjustment voltage corresponding to the source data line.

[0015] In a second aspect, an embodiment of the present invention further provides a display device, and the display device includes a touch display driver integrator:

[0016] The touch display driver integrator is used to determine the voltage drop of the source data line in each column during the touch stage, and perform grayscale voltage compensation on the pixel units of the display row according to the voltage drop of the source data line in each column.

[0017] Optionally, the touch display driver integrator includes:

[0018] A first acquisition module, configured to acquire the first voltage of the source data line in each column at the start of the touch stage;

[0019] A second acquisition module, configured to acquire the second voltage of the source data line in each column at a preset fixed time at the start of the touch stage;

[0020] A voltage drop determination module, configured to determine the voltage drop according to the first voltage and the second voltage.

[0021] Optionally, the touch display driver integrator further includes:

[0022] A grayscale voltage compensation module, configured to determine the source compensation data corresponding to each pixel unit of the display row according to the voltage drop of the source data line in each column, and output the source compensation data through the source data line connected to each pixel unit, so as to perform grayscale voltage compensation on each pixel unit of the display row.

[0023] Optionally, the touch display driver integrator further includes:

[0024] A source compensation data adjustment module is configured to obtain a third voltage of each column of the source data lines, and when the third voltage of a certain source data line is not equal to its corresponding first voltage, determine an adjustment voltage based on the first voltage and the third voltage corresponding to the source data line, and adjust the source compensation data output by the source data line according to the adjustment voltage corresponding to the source data line.

[0025] Optionally, the display device further includes a timing controller; the timing controller is connected to the touch display driver integrator;

[0026] The timing controller is configured to perform grayscale voltage compensation on the pixel units of the display rows according to the voltage drop of each column of the source data lines after the touch display driver integrator determines the voltage drop of each column of the source data lines.

[0027] In a third aspect, an embodiment of the present invention further provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, it implements the method for eliminating the horizontal stripe display of the in-cell touch panel provided in any embodiment of the present invention.

[0028] Embodiments of the present invention can monitor the voltage change of each column of the source data lines during the touch stage, determine the voltage drop amplitude of each column of the source data lines within a fixed time period during the touch stage, that is, the voltage drop. Thus, based on the voltage drop of each column of the source data lines, grayscale voltage compensation can be performed on the pixel units of the display rows connected to each column of the source data lines, so that the voltage on each column of the source data lines remains stable during the touch stage, and further improve the situations such as display line leakage before the touch stage, insufficient charging of sub-pixels of the display line after the touch stage, and attenuation of signals during transmission due to insufficient driving ability of TDDI, thereby solving the problem of horizontal stripe display of the in-cell touch panel and improving the display quality of the in-cell touch panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0030] Figure 1 It is a schematic flowchart of a method for eliminating the horizontal stripe display of an in-cell touch panel provided by an embodiment of the present invention;

[0031] Figure 2 It is a schematic flowchart of a step for determining the voltage drop of each column of the source data lines provided by an embodiment of the present invention;

[0032] Figure 3 A voltage change waveform diagram of a source data line in the first touch stage provided by an embodiment of the present invention;

[0033] Figure 4 A voltage schematic diagram of a source data line in the display stage and the touch stage provided by an embodiment of the present invention;

[0034] Figure 5 A flowchart of another method for eliminating the horizontal stripe display of an in-cell touch panel provided by an embodiment of the present invention;

[0035] Figure 6 A structural schematic diagram of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0038] Figure 1 A flowchart of a method for eliminating the horizontal stripe display of an in-cell touch panel provided by an embodiment of the present invention. This method for eliminating the horizontal stripe display of the in-cell touch panel is applied to a touch display driver integrator, and the touch display driver integrator is connected to the in-cell touch panel. As Figure 1 shown, the method for eliminating the horizontal stripe display of the in-cell touch panel specifically includes:

[0039] S110. Determine the voltage drop of each column of source data lines in the touch stage, and perform grayscale voltage compensation on the pixel units of the display rows according to the voltage drop of each column of source data lines.

[0040] Specifically, for an in-cell touch panel where the display phase and the touch phase are alternately performed in a time-sharing manner, during the display, problems such as leakage of the display lines before the touch phase, insufficient charging of the display lines after the touch phase, and attenuation or distortion of signals during transmission due to insufficient driving ability of TDDI may cause horizontal stripes to appear in the display of the in-cell touch panel. In this application, by monitoring the voltage change of each column of source data lines during the touch phase, the voltage drop amplitude of each column of source data lines within a fixed time period during the touch phase, that is, the voltage drop, can be determined. Based on this voltage drop of each column of source data lines, gray-scale voltage compensation can be performed on the pixel units of the display lines connected to each column of source data lines, so that the voltage on each column of source data lines remains stable during the touch phase, thereby improving the problems such as leakage of the display lines before the touch phase, insufficient charging of the sub-pixels of the display lines after the touch phase, and attenuation of signals during transmission due to insufficient driving ability of TDDI, and thus solving the problem of horizontal stripes in the display of the in-cell touch panel and improving the display image quality of the in-cell touch panel.

[0041] Based on the above embodiments, optionally, Figure 2 It is a schematic flowchart of the steps for determining the voltage drop of each column of source data lines provided by an embodiment of the present invention. As Figure 2 shown, the steps for determining the voltage drop of each column of source data lines are described as follows:

[0042] S210. Obtain the first voltage of each column of source data lines at the start of the touch phase.

[0043] Among them, the first voltage is the voltage of each column of source data lines at the start of each touch phase or the voltage of each column of source data lines at the end of each display phase.

[0044] S220. Obtain the second voltage of each column of source data lines at a preset fixed time after the start of the touch phase.

[0045] Among them, the second voltage is the voltage of each column of source data at a preset fixed time after the start of the touch phase.

[0046] S230. Determine the voltage drop according to the first voltage and the second voltage.

[0047] Among them, the voltage drop is the difference between the first voltage and the second voltage.

[0048] Exemplarily, Figure 3 It is a voltage change waveform diagram of a source data line during a touch phase provided by an embodiment of the present invention. As Figure 3 shown, the voltage at point ① is the first voltage V1 of the source data line, the voltage at point ② is the second voltage V2 of the source data line, and the voltage drop of the source data line is V1 - V2.

[0049] Based on the above embodiments, optionally, performing grayscale voltage compensation on the pixel units of the display row according to the voltage drop of each column of source data lines includes:

[0050] According to the voltage drop of each column of source data lines, determining the source compensation data corresponding to each pixel unit of the display row, and outputting the source compensation data through the source data lines connected to each pixel unit, so as to perform grayscale voltage compensation on each pixel unit of the display row.

[0051] Among them, the source compensation data is essentially the grayscale voltage applied by the TDDI to the pixel unit through the source data line. The voltage drop of each column of source data lines is the source compensation data output by the TDDI through the source data line connected to each pixel unit.

[0052] Exemplarily, Figure 4 FIG. is a voltage schematic diagram of a source data line in the display stage and the touch stage provided by an embodiment of the present invention. As Figure 4 shown, the first voltage waveform is the waveform of the output voltage of a source data line in the prior art, the second voltage waveform is the compensation voltage waveform output by a source data line in the touch stage of this solution, and the third voltage waveform is the voltage waveform output by a source data line in this solution.

[0053] Based on the above embodiments, optionally, Figure 5 FIG. is a flowchart of another method for eliminating the horizontal stripe display of an in-cell touch panel provided by an embodiment of the present invention. As Figure 5 shown, the method for eliminating the horizontal stripe display of the in-cell touch panel includes:

[0054] S310. Determine the voltage drop of each column of source data lines in the touch stage, and perform grayscale voltage compensation on the pixel units of the display row according to the voltage drop of each column of source data lines.

[0055] S320. Obtain the third voltage of each column of source data lines.

[0056] Among them, continuing to refer to Figure 3 , the voltage at point ③ is the third voltage of each column of source data lines. The third voltage is the voltage after each column of source data lines output the source compensation data.

[0057] S330. If the third voltage of a source data line is not equal to its corresponding first voltage, determine the adjustment voltage according to the first voltage and the third voltage corresponding to the source data line, and adjust the source compensation data output by the source data line according to the adjustment voltage corresponding to the source data line.

[0058] Among them, continuing to refer to Figure 3, adjust the voltage to the voltage difference between the voltage at point ① and the voltage at point ③. And adjust the amplitude of the voltage of the source compensation data output by the source data line according to the adjusted voltage corresponding to the source data line, and increase the amplitude of the adjusted voltage.

[0059] Figure 6 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. As Figure 6 shown, the display device includes a touch display driver integrator 610:

[0060] The touch display driver integrator 610 is used to determine the voltage drop of each column of source data lines during the touch stage, and perform gray-scale voltage compensation on the pixel units of the display rows according to the voltage drop of each column of source data lines.

[0061] Among them, in this solution, the touch display driver integrator 610 determines the voltage drop of each column of source data lines in an internal compensation manner during the touch stage, generates a voltage waveform according to the voltage drop of each column of source data lines, or controls the power supply to generate a voltage into the touch display driver integrator 610 to generate a voltage waveform according to the voltage drop of each column of source data lines, so as to perform gray-scale voltage compensation on the pixel units of the display rows.

[0062] An embodiment of the present invention monitors the voltage change of each column of source data lines during the touch stage through the touch display driver integrator 610, and determines the voltage drop amplitude of each column of source data lines within a fixed time period during the touch stage, that is, the voltage drop. Thus, based on the voltage drop of each column of source data lines, gray-scale voltage compensation can be performed on the pixel units of the display rows connected to each column of source data lines, so that the voltage on each column of source data lines remains stable during the touch stage, and further improve the problems such as display row leakage before the touch stage, insufficient charging of sub-pixels in the display row after the touch stage, and attenuation of signals during transmission due to insufficient driving ability of TDDI, thereby solving the problem of display of horizontal stripes on the in-cell touch panel.

[0063] On the basis of the above embodiment, optionally, the touch display driver integrator includes:

[0064] The first acquisition module is used to acquire the first voltage of each column of source data lines at the start of the touch stage;

[0065] The second acquisition module is used to acquire the second voltage of each column of source data lines at a preset fixed time after the start of the touch stage;

[0066] The voltage drop determination module is used to determine the voltage drop according to the first voltage and the second voltage.

[0067] On the basis of the above embodiment, optionally, the touch display driver integrator further includes:

[0068] A grayscale voltage compensation module is used to determine source compensation data corresponding to each pixel unit of a display row according to the voltage drop of each column of source data lines, and output the source compensation data through the source data lines connected to each pixel unit, so as to perform grayscale voltage compensation on each pixel unit of the display row.

[0069] Based on the above embodiments, optionally, the touch display driver integrator further includes:

[0070] A source compensation data adjustment module is used to obtain the third voltage of each column of source data lines, and when the third voltage of a source data line is not equal to its corresponding first voltage, determine an adjustment voltage according to the first voltage and the third voltage corresponding to the source data line, and adjust the source compensation data output by the source data line according to the adjustment voltage corresponding to the source data line.

[0071] Based on the above embodiments, optionally, the display device further includes a timing controller; the timing controller is connected to the touch display driver integrator;

[0072] The timing controller is used to perform grayscale voltage compensation on the pixel units of the display row according to the voltage drop of each column of source data lines after the touch display driver integrator determines the voltage drop of each column of source data lines.

[0073] Among them, in this solution, grayscale voltage compensation is performed on the pixel units of the display row through an external compensation method, and a timing controller needs to be set. After the touch display driver integrator determines the voltage drop of each column of source data lines, the timing controller generates a compensation voltage waveform according to the voltage drop of each column of source data lines to perform grayscale voltage compensation on the pixel units of the display row.

[0074] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements the method for eliminating the horizontal stripe display of an in-cell touch panel provided in any embodiment of the present invention.

[0075] The computer storage medium of the embodiments of the present invention may adopt any combination of one or more computer-readable media. The computer-readable media may be computer-readable signal media or computer-readable storage media. The computer-readable storage media may be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination of the above. The computer-readable storage media includes (a non-exhaustive list): electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), electrically erasable, programmable read-only memory (EPROM), flash memory, optical fibers, portable compact disc read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In the present invention, the computer-readable storage media may be any tangible medium that contains or stores a program, and the program may be used by or in combination with an instruction execution system, device, or component.

[0076] The computer-readable signal media may include data signals propagated in a baseband or as part of a carrier wave, and the data signals carry computer-readable program codes. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal media may also be any computer-readable media other than the computer-readable storage media, and the computer-readable media may send, propagate, or transmit a program for use by or in combination with an instruction execution system, device, or component.

[0077] The program codes contained on the computer-readable media may be transmitted by any appropriate medium, including but not limited to wireless, wire, optical cable, radio frequency (RF), etc., or any suitable combination of the above.

[0078] Computer program code for performing the operations of this disclosure can be written in one or more programming languages or combinations of programming languages, including object-oriented programming languages such as Java, Smalltalk, C++, Ruby, Go, and also including conventional procedural programming languages such as the "C" language or similar programming languages. The program code can execute entirely on the user's computer, partially on the user's computer, execute as a stand-alone software package, execute partially on the user's computer and partially on a remote computer, or execute entirely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network (including a Local Area Network (LAN) or a Wide Area Network (WAN)), or, can be connected to an external computer (e.g., via an Internet service provider through the Internet).

[0079] Those skilled in the art will understand that the term user terminal encompasses any suitable type of wireless user equipment, such as a mobile phone, a portable data processing device, a portable web browser, or a vehicle-mounted mobile station.

[0080] In general, various embodiments of the present invention can be implemented in hardware or a dedicated circuit, software, logic, or any combination thereof. For example, some aspects can be implemented in hardware, while other aspects can be implemented in firmware or software that can be executed by a controller, a microprocessor, or other computing devices, although the present invention is not limited thereto.

[0081] Embodiments of the present invention can be implemented by a data processor of a mobile device executing computer program instructions, for example, in a processor entity, or by hardware, or by a combination of software and hardware. The computer program instructions can be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state-setting data, or source code or object code written in any combination of one or more programming languages.

[0082] Any block diagram of a logic flow in the drawings of the present invention may represent program steps, or may represent interconnected logic circuits, modules, and functions, or may represent a combination of program steps and logic circuits, modules, and functions. A computer program may be stored in a memory. The memory may be of any type suitable for the local technical environment and may be implemented using any suitable data storage technology, such as, but not limited to, read-only memory (ROM), random access memory (RAM), optical memory devices and systems (Digital Versatile Disc (DVD) or Compact Disc (CD)), etc. A computer-readable medium may include a non-transitory storage medium. A data processor may be of any type suitable for the local technical environment, such as, but not limited to, a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), and a processor based on a multi-core processor architecture.

[0083] It should be understood that the various forms of the flow shown above may be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention may be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0084] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for eliminating horizontal stripes on an embedded touch panel, characterized in that: include: In the touch control stage, the voltage drop of each column of source data lines is determined, and grayscale voltage compensation is performed on the pixel units of the display row according to the voltage drop of each column of the source data lines.

2. The method for eliminating horizontal stripes on an embedded touch panel according to claim 1, wherein: The step of determining the voltage drop of each column of the source data lines comprises: Acquire a first voltage of each column of the source data lines at the beginning of the touch control phase; Acquire the second voltage of each column of the source data lines at a preset fixed time starting from the touch control stage; The voltage drop is determined according to the first voltage and the second voltage.

3. The method for eliminating horizontal stripes on an embedded touch panel according to claim 2, wherein: The grayscale voltage compensation is performed on the pixel units of the display row according to the voltage drop of each column of the source data line, comprising: According to the voltage drop of each column of the source data line, the source compensation data corresponding to each pixel unit of the display row is determined, and the source compensation data is output through the source data line connected to each pixel unit to perform grayscale voltage compensation for each pixel unit of the display row.

4. The method for eliminating horizontal stripes on an embedded touch panel according to claim 3, characterized in that: After the source compensation data is output through the source data line connected to each pixel unit, the method further includes: Acquire a third voltage of each column of the source data lines; If the third voltage of the source data line is not equal to the first voltage corresponding to it, an adjustment voltage is determined according to the first voltage and the third voltage corresponding to the source data line, and the source compensation data output by the source data line is adjusted according to the adjustment voltage corresponding to the source data line.

5. A display device, characterized in that: Including touch display driver integrator: The touch display driver integrator is used to determine the voltage drop of each column of source data lines during the touch stage, and perform grayscale voltage compensation on the pixel units of the display row according to the voltage drop of each column of the source data lines.

6. The display device according to claim 5, characterized in that: The touch display driver integrator comprises: The first acquisition module is used to acquire the first voltage of each column of the source data lines at the beginning of the touch control stage; A second acquisition module, used for acquiring a second voltage of each column of the source data lines when a preset fixed time starts at the touch control stage; A voltage drop determination module is used to determine the voltage drop according to the first voltage and the second voltage.

7. The display device according to claim 6, characterized in that: The touch display driver integrator also includes: A grayscale voltage compensation module is used to determine the source compensation data corresponding to each pixel unit in the display row according to the voltage drop of the source data line in each column, and output the source compensation data through the source data line connected to each pixel unit to perform grayscale voltage compensation on each pixel unit in the display row.

8. The display device according to claim 7, characterized in that: The touch display driver integrator also includes: A source compensation data adjustment module is used to obtain the third voltage of each column of the source data line, and when the third voltage of the source data line is not equal to the first voltage corresponding to it, determine the adjustment voltage according to the first voltage and the third voltage corresponding to the source data line, and adjust the source compensation data output by the source data line according to the adjustment voltage corresponding to the source data line.

9. The display device according to claim 5, characterized in that: It also includes a timing controller; the timing controller is connected to the touch display driver integrator; The timing controller is used to perform grayscale voltage compensation on the pixel units of the display row according to the voltage drop of each column of the source data line after the touch display driver integrator determines the voltage drop of each column of the source data line.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for eliminating horizontal stripes on a built-in touch panel as described in any one of claims 1 to 4 is implemented.

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