Display panel driving method and system

Abstract

This invention discloses a display panel driving method and system. The method includes the following steps: In the display stage, the gate lines of the display panel are scanned, and the corresponding data line voltages are sequentially written to pixels to obtain the first pixel voltage of the last row of gate lines in the display stage; after the touch stage, the second pixel voltage of the last row of gate lines is obtained using the first pixel voltage, voltage retention rate, and touch time; after the touch ends, the second pixel voltage is written to the last row of gate lines to start the gate line scanning of the next display stage; thereby, the display stage and the touch stage are time-division driven scanning until the scanning of the entire image is completed. Implementing this invention eliminates the display stripe phenomenon that occurs during the switching between the display stage and the touch scanning stage, solving the technical problem.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display technology, and in particular to a display panel driving method and system. Background Technology

[0002] Liquid crystal displays (LCDs) have advantages such as low radiation, small size, and low power consumption, and have gradually replaced traditional cathode ray tube displays (CRTs). Therefore, they are widely used in information products such as laptops, personal digital assistants (PDAs), flat-screen TVs, and mobile phones. Compared to the original method of placing the touch panel on the LCD panel, research on integrating touch panel functionality with the LCD panel is becoming increasingly popular. The integration of touch panels and LCD panels includes the "In-cell" method and the "On-cell" method. In-cell refers to the method of embedding the touch panel functionality into the liquid crystal pixels.

[0003] LCDs using the "In-cell" method are typically driven by Long H, meaning that display and touch input are driven in segments within a single frame, rather than after the display ends. This driving method can cause horizontal lines to appear at the transition between display and touch input, affecting the display quality. Summary of the Invention

[0004] In existing display technologies, horizontal lines are prone to appear at the switching points between display and touch when performing time-division driving scanning.

[0005] To address the aforementioned issues, a display panel driving method and system are proposed. After the touch phase, the second pixel voltage of the last row gate line is obtained using the first pixel voltage, voltage retention rate, and touch time; and the second pixel voltage is written into the last row gate line to initiate gate line scanning in the next display phase. This eliminates the horizontal display lines that occur during the switching between the display phase and the touch scanning phase, thus solving the technical problem.

[0006] Firstly, a display panel driving method includes:

[0007] Step 100: During the display stage, the gate lines of the display panel are scanned, and the corresponding data line voltages are sequentially written to the pixels to obtain the first pixel voltage of the last row of gate lines in the display stage.

[0008] Step 200: After the touch phase, the second pixel voltage of the last row gate line is obtained using the first pixel voltage, voltage retention rate and touch time.

[0009] Step 300: At the start of the next display stage, the second pixel voltage is written into the last row gate line, and the gate line scan of the next display stage is performed.

[0010] Step 400: Accordingly, perform time-division driving scanning of the display stage and the touch stage until the scanning of the entire image is completed;

[0011] The difference between the voltage of the second pixel and the voltage of the first pixel is the leakage power during touch time.

[0012] In conjunction with the display panel driving method described in the first aspect of the present invention, in a first possible embodiment, step 100 includes:

[0013] Step 110: Scan the gate lines line by line sequentially during the display phase;

[0014] Step 120: After scanning is completed, obtain the first pixel voltage of the last row gate line of the display stage;

[0015] Step 130: Turn off the last row gate line and perform touch scanning.

[0016] In conjunction with the display panel driving method described in the first aspect of the present invention, in a second possible embodiment, step 200 includes:

[0017] Step 210: During the touch phase, maintain the pixel voltage of the last row gate line.

[0018] In conjunction with the display panel driving method described in the first aspect of the present invention, in a third possible embodiment, step 200 further includes:

[0019] Step 220: Calculate the touch scanning time using the start and end times of the touch scanning phase;

[0020] Step 230: Obtain the voltage retention rate of the pixels of the display panel;

[0021] Step 240: Calculate the voltage of the second pixel using formula (1):

[0022] Second pixel voltage = voltage retention rate × touch scan time, (1).

[0023] In conjunction with the third possible implementation of the first aspect of the present invention, in the fourth possible implementation, step 300 includes:

[0024] Step 310: At the start of the next display stage, the last row gate line of the previous display stage is scanned as the first row gate line of the current display stage.

[0025] Step 320: Write the second pixel voltage as the pixel voltage of the first row of gate lines in the current display stage;

[0026] Step 330: Scan the remaining gate lines of the current display stage sequentially.

[0027] In a second aspect, a display panel driving system, employing the method described in the first aspect for driving scanning, includes:

[0028] Display scanning module;

[0029] Voltage acquisition module;

[0030] Write to the module;

[0031] Control module;

[0032] The display scanning module, voltage acquisition module, and writing module are each electrically connected to the control module.

[0033] The display scanning module is used to scan the gate lines of the display panel sequentially during the display stage, and write the corresponding data line voltages into the pixels sequentially to obtain the first pixel voltage of the last row of gate lines.

[0034] The voltage acquisition module is used to acquire the second pixel voltage of the last row gate line after the touch stage, using the first pixel voltage, voltage retention rate and touch time.

[0035] The writing module is used to write the second pixel voltage into the last row gate line at the start of the next display stage, thereby enabling gate line scanning in the next display stage.

[0036] The difference between the voltage of the second pixel and the voltage of the first pixel is the leakage power during touch time.

[0037] In conjunction with the display panel driving system described in the second aspect of the present invention, in a first possible embodiment, the display scanning module is further configured to:

[0038] During the display phase, the gate lines are scanned line by line, and after the scan is completed, the first pixel voltage of the last row of gate lines in the display phase is obtained.

[0039] In conjunction with the display panel driving system described in the second aspect of the present invention, in a second possible embodiment, the voltage acquisition module is further configured to:

[0040] During the touch phase, the pixel voltage of the last row of gate lines is maintained.

[0041] In conjunction with the second possible embodiment of the second aspect of the present invention, in a third possible embodiment, the voltage acquisition module is further configured to:

[0042] The touch scanning time is calculated using the start and end times of the touch scanning phase, the voltage retention rate of the pixels of the display panel is obtained, and the voltage of the second pixel is calculated using formula (1):

[0043] Second pixel voltage = voltage retention rate × touch scan time, (1).

[0044] In conjunction with the third possible implementation of the second aspect of the present invention, and in the fourth possible implementation, the writing module is further configured to:

[0045] At the start of the next display phase, the last row gate line of the previous display phase is scanned as the first row gate line of the current display phase, the second pixel voltage is written as the pixel voltage of the first row gate line of the current display phase, and the remaining gate lines of the current display phase are scanned sequentially.

[0046] The display panel driving method and system described in this invention eliminates the horizontal display lines phenomenon that occurs during the switching between the display stage and the touch scanning stage, thereby solving the technical problem. This is achieved by obtaining the second pixel voltage of the last row gate line using the first pixel voltage, voltage retention rate, and touch time after the touch stage; and writing the second pixel voltage into the last row gate line to start the gate line scanning of the next display stage. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the driving timing of a display panel driving method according to the present invention;

[0049] Figure 2 This is a schematic diagram of the voltage holding rate curve in a display panel driving method of the present invention;

[0050] Figure 3 This is a schematic diagram of the grayscale and pixel voltage correspondence curve in a display panel driving method of the present invention;

[0051] Figure 4 This is a first schematic diagram of a display panel driving method according to the present invention;

[0052] Figure 5 This is a second schematic diagram of a display panel driving method according to the present invention;

[0053] Figure 6This is a third schematic diagram of a display panel driving method according to the present invention;

[0054] Figure 7 This is a fourth schematic diagram of a display panel driving method according to the present invention;

[0055] Figure 8 This is a schematic diagram of a display panel driving system according to the present invention. Detailed Implementation

[0056] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are all within the scope of protection of this invention.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0058] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0059] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0060] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0061] In existing display technologies, horizontal lines are prone to appear at the switching points between display and touch when performing time-division driving scanning.

[0062] To address the above problems, a display panel driving method and system are proposed.

[0063] Example 1

[0064] First, as Figure 4 , Figure 4 This is a first schematic diagram of a display panel driving method according to the present invention;

[0065] A display panel driving method, comprising:

[0066] Step 100: During the display stage, the gate lines of the display panel are scanned, and the corresponding data line voltages are written to the pixels in sequence to obtain the first pixel voltage of the last row of gate lines.

[0067] Preferably, such as Figure 5 , Figure 5 This is a second schematic diagram of a display panel driving method according to the present invention; step 100 includes:

[0068] Step 110: Scan the gate lines line by line in the display phase; Step 120: After scanning is completed, obtain the first pixel voltage of the last row gate line in the display phase; Step 130: Turn off the last row gate line and perform touch scanning.

[0069] like Figure 1 , Figure 1 This is a schematic diagram of the driving timing of a display panel driving method according to the present invention; the display stage and the touch stage are time-division scanning driven. In the display stage, the corresponding gate lines are scanned, and the data line voltages are sequentially pixel by pixel. The pixel voltage of the last row of gate lines in the current display stage is retained and obtained so as to obtain the pixel voltage of the last row of gate lines after voltage holding.

[0070] Step 200: After the touch phase, the second pixel voltage of the last row gate line is obtained using the first pixel voltage, voltage holding rate, and touch time.

[0071] Preferably, step 200 includes:

[0072] Step 210: During the touch phase, the pixel voltage of the last row gate line is held. After the last row gate line is turned off, the touch scanning phase begins. After the touch scanning phase time T, the pixel voltage on the last row gate line experiences leakage. If gate line scanning is performed directly at this time, horizontal lines will appear on the display. In this embodiment, the pixel voltage of the last row gate line after the touch scanning phase time T is calculated by obtaining the voltage holding rate, and then input into the last row data line.

[0073] Preferably, such as Figure 6 , Figure 6This is a third schematic diagram of a display panel driving method according to the present invention; step 200 further includes: step 220, calculating the touch scanning time using the scan start and end times of the touch scanning phase; step 230, obtaining the voltage retention rate of the pixels of the display panel; as shown Figure 2 , Figure 2 This is a schematic diagram of the voltage retention rate curve in a display panel driving method of the present invention; Step 240: Calculate the voltage of the second pixel using formula (1):

[0074] Second pixel voltage = voltage retention rate × touch scan time, (1).

[0075] After the voltage is maintained for the time T of the touch phase,

[0076] Step 300: After the touch operation ends, the second pixel voltage is written to the last row gate line to start the gate line scanning of the next display stage.

[0077] Preferably, such as Figure 7 , Figure 7 This is a fourth schematic diagram of a display panel driving method according to the present invention. Step 300 includes:

[0078] Step 310: At the start of the next display stage, scan the last row gate line of the previous display stage as the first row gate line of the current display stage; Step 320: Write the second pixel voltage as the pixel voltage of the first row gate line of the current display stage; Step 330: Scan the remaining gate lines of the current display stage in sequence.

[0079] like Figure 1 and Figure 2 The scanning driving principle of this embodiment is as follows:

[0080] In the first display stage, gate lines GI to G5 are sequentially turned on, and the corresponding data line voltages are written to the pixels sequentially. Afterwards, gate line G5 is turned off, the pixel voltage is maintained, and the first TP stage begins. Assuming that after a touch scan time T, the touch scan stage TP ends, and G6 is usually turned on next, which would result in horizontal lines appearing on the display. Therefore, after a touch scan time T, the previous row's gate line G5 is turned on again. Since gate line G5 has already had data written before the touch scan time T, let's assume this data is Vp1. In the second display stage, after G5 is turned on, data Vp2 is written first. The difference between Vp1 and Vp2 is the pixel voltage leakage current over time T1. This value has already been processed by... Figure 2 The voltage holding rate curve shown is read. This eliminates the horizontal stripe phenomenon on the display, and then the gate lines G6, G7, and other subsequent gates are turned on again, and the corresponding data is written.

[0081] Similarly, refer to the following: Figure 1After the Gn-1 display stage, the touch scanning stage begins. After the touch stage is completed, the next display stage is entered to scan the Gn-1 row to write the data from the previous row. Then, the operations of multiple touch stages and multiple display stages are completed in sequence, thus completing the display refresh of one frame of image.

[0082] Step 400: Accordingly, time-division driving scan is performed on the display stage and the touch stage until the scan of the entire image is completed; wherein, the difference between the voltage of the second pixel and the voltage of the first pixel is the leakage power of the touch time.

[0083] like Figure 3 , Figure 3 This is a schematic diagram illustrating the relationship between grayscale and pixel voltage in a display panel driving method according to the present invention. As can be seen from the figure, grayscale (grey1, grey2) and pixel voltage (Vd1, Vd2) are positively correlated. By obtaining the second pixel voltage of the last row gate line after the touch phase using the first pixel voltage, voltage retention rate, and touch time; and writing the second pixel voltage into the last row gate line to initiate gate line scanning in the next display phase, the horizontal display lines that occur during the switching between the display phase and the touch scanning phase are eliminated, thus solving the technical problem.

[0084] Example 2

[0085] Secondly, such as Figure 8 , Figure 8 This is a schematic diagram of a display panel driving system according to the present invention. The display panel driving system employs a first aspect method for driving scanning and includes a display scanning module 20, a voltage acquisition module 30, a writing module 40, and a control module 10. The display scanning module 20, voltage acquisition module 30, and writing module 40 are electrically connected to the control module 10. During the display phase, the display scanning module 20 sequentially scans the gate lines of the display panel and sequentially writes the corresponding data line voltages to the pixels to acquire the first pixel voltage of the last row of gate lines. The voltage acquisition module 30, after the touch phase, acquires the second pixel voltage of the last row of gate lines using the first pixel voltage, voltage retention rate, and touch time. The writing module 40, after the touch phase ends, writes the second pixel voltage to the last row of gate lines to initiate gate line scanning for the next display phase. The difference between the second pixel voltage and the first pixel voltage is the leakage current during the touch time.

[0086] Furthermore, the display scanning module 20 is also used to: scan the gate lines line by line sequentially during the display phase, and after the scanning is completed, obtain the first pixel voltage of the last row of gate lines in the display phase.

[0087] Furthermore, the voltage acquisition module 30 is also used to: maintain the pixel voltage of the last row gate line during the touch phase.

[0088] Furthermore, the voltage acquisition module 30 is also used for:

[0089] The touch scanning time is calculated using the start and end times of the touch scanning phase, the voltage retention rate of the pixels on the display panel is obtained, and the voltage of the second pixel is calculated using formula (1):

[0090] Second pixel voltage = voltage retention rate × touch scan time, (1).

[0091] Furthermore, the writing module 40 is also configured to: at the start of the next display stage, scan the last row gate line of the previous display stage as the first row gate line of the current display stage, write the second pixel voltage as the pixel voltage of the first row gate line of the current display stage, and sequentially scan the remaining gate lines of the current display stage.

[0092] The present invention provides a display panel driving method and system that, after the touch phase, obtains the second pixel voltage of the last row gate line using the first pixel voltage, voltage retention rate, and touch time; and writes the second pixel voltage into the last row gate line to start the gate line scanning of the next display phase; thereby eliminating the display stripe phenomenon that occurs during the switching between the display phase and the touch scanning phase and solving the technical problem.

[0093] The above are merely 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 within the protection scope of the present invention.

Claims

1. A display panel driving method, characterized in that it includes: Step 100: During the display stage, the gate lines of the display panel are scanned, and the corresponding data line voltages are sequentially written to the pixels to obtain the first pixel voltage of the last row of gate lines in the display stage. Step 200: After the touch phase, the second pixel voltage of the last row gate line is obtained using the first pixel voltage, voltage retention rate and touch time. Step 300: At the start of the next display stage, the second pixel voltage is written into the last row gate line, and the gate line scan of the next display stage is performed. Step 400: Accordingly, perform time-division driving scanning of the display stage and the touch stage until the scanning of the entire image is completed; The difference between the voltage of the second pixel and the voltage of the first pixel is the leakage power during the touch time. Step 200 includes: Step 210: During the touch phase, maintain the pixel voltage of the last row gate line; Step 220: Calculate the touch scanning time using the start and end times of the touch scanning phase; Step 230: Obtain the voltage retention rate of the pixels of the display panel; Step 240: Calculate the voltage of the second pixel using formula (1): Second pixel voltage = voltage retention rate × touch scan time, (1); Step 300 includes: Step 310: At the start of the next display stage, the last row gate line of the previous display stage is scanned as the first row gate line of the current display stage. Step 320: Write the second pixel voltage as the pixel voltage of the first row of gate lines in the current display stage; Step 330: Scan the remaining gate lines of the current display stage sequentially.

2. The display panel driving method according to claim 1, characterized in that, Step 100 includes: Step 110: Scan the gate lines line by line sequentially during the display phase; Step 120: After scanning is completed, obtain the first pixel voltage of the last row gate line of the display stage; Step 130: Turn off the last row gate line and perform touch scanning.

3. A display panel driving system, comprising driving scanning using the method described in any one of claims 1-2, characterized in that, include: Display scanning module; Voltage acquisition module; Write to the module; Control module; The display scanning module, voltage acquisition module, and writing module are each electrically connected to the control module. The display scanning module is used to scan the gate lines of the display panel sequentially during the display stage, and write the corresponding data line voltages into the pixels sequentially to obtain the first pixel voltage of the last row of gate lines. The voltage acquisition module is used to acquire the second pixel voltage of the last row gate line after the touch stage, using the first pixel voltage, voltage retention rate and touch time. The writing module is used to write the second pixel voltage into the last row gate line at the start of the next display stage, thereby enabling gate line scanning in the next display stage. The difference between the voltage of the second pixel and the voltage of the first pixel is the leakage power during touch time.

4. The display panel driving system according to claim 3, characterized in that, The display scanning module is also used for: During the display phase, the gate lines are scanned line by line, and after the scan is completed, the first pixel voltage of the last row of gate lines in the display phase is obtained.

5. The display panel driving system according to claim 4, characterized in that, The voltage acquisition module is also used for: During the touch phase, the pixel voltage of the last row of gate lines is maintained.

6. The display panel driving system according to claim 5, characterized in that, The voltage acquisition module is also used for: The touch scanning time is calculated using the start and end times of the touch scanning phase, the voltage retention rate of the pixels of the display panel is obtained, and the voltage of the second pixel is calculated using formula (1): Second pixel voltage = voltage retention rate × touch scan time, (1).

7. The display panel driving system according to claim 6, characterized in that, The writing module is also used for: At the start of the next display phase, the last row gate line of the previous display phase is scanned as the first row gate line of the current display phase, the second pixel voltage is written as the pixel voltage of the first row gate line of the current display phase, and the remaining gate lines of the current display phase are scanned sequentially.

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