GOA driving method of touch display device and touch display device
By chunking the gate lines of the touch display device and performing bidirectional driving scan, the problem of displaying horizontal lines in the Long H drive mode is solved, and the continuous transmission of high-level signals is achieved, avoiding leakage and improving the display effect.
Patent Information
- Application Number
- CN202510895042.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2025-08-08
AI Technical Summary
In the Long H drive mode, a horizontal pattern appears at the beginning and end positions of the touch stage, causing the P point potential of the circuit module unit in the GOA circuit to leak.
By chunking the gate lines of the display device, display driving scans in two directions, and after the display stage ends, the GOA circuit driving output level signal is transmitted by pseudo-drive scanning to avoid pausing the high-level signal.
It solves the leakage problem of level signal holding points, avoids the appearance of horizontal lines, and improves the display quality and consumer experience.
Smart Images
Figure CN120452344A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of display stripes of a touch display screen, and in particular to a GOA driving method of a touch display device and a touch display device. Background Art
[0002] Embedded touch display devices have been widely used. However, in the Long H drive mode, because the touch phase and display phase are driven separately and alternately within a cycle, horizontal stripes often appear on the display at the transition between the display phase and the touch phase. For example, in a cycle, assume that the gate drive reaches Gn-1, then the touch phase scan is performed. After the touch phase ends, the gate drive for the Gn row is performed. During the touch phase, the gate drive is in a paused state until the touch scan phase ends, when the drive output for the next gate scan row continues, that is, the gate scan is continuous. However, due to the paused state, the potential of the P point of the holding circuit module unit in the GOA circuit will leak, causing horizontal stripes on the display screen at the beginning and end of the touch phase. Summary of the Invention
[0003] In the prior art, in the Long H driving mode of a display screen, a horizontal stripe phenomenon appears at the start and end of the touch phase.
[0004] To address the above problems, a GOA driving method for a touch display device and a touch display device are proposed. The method divides the gate lines of the display device into blocks, performs display drive scanning in two directions, and performs a pseudo-drive scan transmission on the GOA circuit drive output level signal after the display phase ends and the touch phase begins. During the touch phase, the high-level signal of the GOA circuit is not paused, which solves the leakage problem of the level signal holding point and helps avoid the appearance of horizontal stripes on the display.
[0005] In a first aspect, a GOA driving method for a touch display device includes: Step 100: In a first display phase, a first drive scan is performed on a first predetermined number of gate lines in a first direction, and after entering a first touch phase, the GOA circuit is driven to output a level signal to perform a dummy drive scan in the first direction. Step 200: When the first touch phase ends and the second display phase begins, starting from the last gate line of the first drive scan, a second drive scan is performed on the first predetermined number of gate lines in a second direction, and after entering the second touch phase, the GOA circuit is driven to output a level signal to perform a dummy drive scan in the second direction. Step 300, repeat steps 100-200; The scanning direction of the first direction is opposite to the scanning direction of the second direction.
[0006] In conjunction with the GOA driving method for a touch display device according to the first aspect of the present invention, in a first possible implementation, step 100 includes: Step 110: Acquire all gate lines of the touch display device; Step 120 : Divide all gate lines into a plurality of gate line scanning blocks including the first specified number of gate lines according to the display phase scanning time.
[0007] In conjunction with the first possible implementation of the first aspect of the present invention, in a second possible implementation, step 100 further includes: Step 130 : In the first display stage, the first gate line scanning module is subjected to line-by-line scanning in a first direction; Step 140 : When the first display phase ends and the first touch phase begins, the GOA circuit of the last row of the first gate line scan module of the first drive scan is driven to output a level signal to perform a dummy drive scan in the first direction.
[0008] In conjunction with the first possible implementation of the first aspect of the present invention, in a third possible implementation, step 140 includes: Step 141: After the first touch control phase begins, the GOA circuit driving output level signal of the last row of the first gate line scanning module of the first drive scan is transmitted to the GOA circuit of the next row; Step 142: In the first touch stage, after receiving the GOA circuit drive output level signal, the GOA circuit in the next row turns off the gate drive output and continues to transmit the GOA circuit drive output level signal to the GOA circuit in the next row; Step 143: Repeat steps 141-142 until the first touch control phase ends.
[0009] In conjunction with the GOA driving method for a touch display device according to the first aspect of the present invention, in a fourth possible implementation, step 200 includes: Step 210: After the second display phase begins, perform line-by-line scanning in a second direction on a second gate line scanning module corresponding to the second display phase; Step 220 : When the second display phase ends and the second touch phase begins, the GOA circuit of the last row of the second gate line scan module of the second drive scan is driven to output a level signal to perform a dummy drive scan in the second direction.
[0010] In conjunction with the fourth possible implementation manner of the first aspect of the present invention, in a fifth possible implementation manner, step 220 includes: Step 221: After the second touch control phase begins, the GOA circuit driving output level signal of the last row of the second gate line scanning module of the second drive scan is transmitted to the GOA circuit of the next row; Step 222: In the second touch stage, after receiving the GOA circuit drive output level signal, the GOA circuit in the next row turns off the gate drive output and continues to transmit the GOA circuit drive output level signal to the GOA circuit in the next row; Step 223: Repeat steps 221-222 until the second touch control phase ends.
[0011] In a second aspect, a touch display device adopts the GOA driving method of the touch display device according to the first aspect, comprising: Control module; Array circuit; The array circuit includes a plurality of GOA circuits and a plurality of gate line scanning modules; The multiple GOA circuits are divided into multiple GOA circuit groups; The plurality of GOA circuit groups are electrically connected to the left side and the right side of the plurality of gate line scanning modules in alternating order; The control module is electrically connected to the array circuit through the multiple GOA circuits, In the first display stage, a first drive scan is performed on a first specified number of gate lines in a first direction, and after entering the first touch stage, the GOA circuit is continued to drive the output level signal to perform a pseudo drive scan in the first direction. When the first touch stage ends and the second display stage begins, starting from the last gate line of the first drive scan, the first specified number of gate lines are subjected to a second drive scan in a second direction, and after entering the second touch stage, the GOA circuit is continued to drive the output level signal to perform a pseudo drive scan in the second direction, wherein the scanning direction of the first direction is opposite to the scanning direction of the second direction.
[0012] In combination with the touch display device described in the second aspect of the present invention, in a first possible implementation manner, the control module is further used to: in a first display stage, scan the first gate line scan module line by line in a first direction, and when the first display stage ends and the first touch stage begins, drive the GOA circuit output level signal of the last row of the first gate line scan module of the first drive scan to perform a pseudo drive scan in the first direction.
[0013] In combination with the first possible implementation manner of the second aspect of the present invention, in a second possible implementation manner, the control module is further used to: after the first touch stage starts, the GOA circuit drive output level signal of the last row of the first gate line scan module of the first drive scan is passed to the GOA circuit of the next row. In the first touch stage, after the GOA circuit of the next row receives the GOA circuit drive output level signal, it turns off the gate drive output and continues to pass the GOA circuit drive output level signal to the GOA circuit of the next row until the first touch stage ends.
[0014] In conjunction with the touch display device according to the second aspect of the present invention, in a fourth possible implementation manner, the control module is further configured to: After the second display stage begins, the second gate line scan module corresponding to the second display stage is scanned row by row in the second direction. When the second display stage ends and the second touch stage begins, the GOA circuit of the last row of the second gate line scan module of the second drive scan is driven to output a level signal to perform a pseudo drive scan in the second direction.
[0015] The GOA driving method and touch display device of the present invention divide the gate lines of the display device into blocks, perform display drive scanning in two directions, and perform pseudo drive scanning and transmission on the GOA circuit drive output level signal after the display phase ends and the touch phase begins. The high level signal of the GOA circuit is not paused during the touch phase, thereby solving the leakage problem of the level signal holding point and facilitating the avoidance of horizontal stripes on the display. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] 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.
[0017] Figure 1 This is a schematic diagram of the driving timing in this application; Figure 2 1 is a flow chart of a specific embodiment of the GOA driving method for the touch display device in the present application; Figure 3 yes Figure 2 A schematic flow chart of a specific embodiment of step 100; Figure 4 yes Figure 3 A schematic flow chart of a specific embodiment after step 120; Figure 5 yes Figure 4A schematic flow chart of a specific embodiment of step 140; Figure 6 yes Figure 1 A schematic flow chart of a specific embodiment of step 200; Figure 7 yes Figure 6 A schematic flow chart of a specific embodiment of step 220; Figure 8 It is a schematic diagram of the module structure of the touch display device; Figure 9 It is a schematic diagram of a specific embodiment of the touch display device in this application. DETAILED DESCRIPTION
[0018] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of 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.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0020] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0022] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0023] In the prior art, in the Long H driving mode of a display screen, a horizontal stripe phenomenon appears at the start and end of the touch phase.
[0024] To address the above problems, a GOA driving method for a touch display device and a touch display device are proposed.
[0025] In a first aspect, a GOA driving method for a touch display device is provided. Figure 2 , Figure 2 This is a flow chart of a specific embodiment of the GOA driving method of the touch display device in this application; it includes: Step 100 : In a first display phase, a first drive scan is performed on a first predetermined number of gate lines in a first direction, and after entering a first touch phase, the GOA circuit is driven to output a level signal to perform a dummy drive scan in the first direction.
[0026] In one possible implementation, Figure 3 , Figure 3 yes Figure 2 A flow chart of a specific embodiment of step 100; step 100 includes: step 110, obtaining all gate lines of the touch display device; step 120, dividing all gate lines into multiple gate line scanning blocks including a first specified number of gate lines according to the display stage scanning time.
[0027] In this embodiment, the gate lines of a touch display device are divided into blocks, using a display screen with 1600 rows as an example. Specifically, G1-G200, G401-G600, G801-G1000, and G1201-G1400 are driven by GOA_L, while G201-G400, G601-G800, G1001-G1200, and G1401-G1600 are driven by GOA_R.
[0028] In one possible implementation, Figure 4 , Figure 4 yes Figure 3A flow chart of a specific embodiment after step 120 in the figure; step 100 also includes: step 130, in the first display stage, scanning the first gate line scanning module line by line in the first direction; step 140, when the first display stage ends and the first touch stage begins, the GOA circuit driving output level signal of the last row of the first gate line scanning module of the first drive scan is used to perform a pseudo drive scan in the first direction.
[0029] In one possible implementation, Figure 5 , Figure 5 yes Figure 4 A flow chart of a specific embodiment of step 140 in FIG. 1 is provided; step 140 includes: step 141, after the first touch phase begins, transmitting the GOA circuit drive output level signal of the last row of the first gate line scan module of the first drive scan to the GOA circuit of the next row; step 142, during the first touch phase, after the GOA circuit of the next row receives the GOA circuit drive output level signal, turning off the gate drive output and continuing to transmit the GOA circuit drive output level signal to the GOA circuit of the next row; step 143, repeating steps 141-142 until the first touch phase ends.
[0030] In this embodiment, the gate drive of a touch display device is divided into left and right drive modes. A touch display device with 1600 rows is used as an example for explanation. Specifically, G1-G200, G401-G600, G801-G1000, and G1201-G1400 are driven by GOA_L, while G201-G400, G601-G800, G1001-G1200, and G1401-G1600 are driven by GOA_R.
[0031] like Figure 1 , Figure 1 This is a driving timing diagram in this application; the GOA_L on the left first performs the gate drive of the first display stage G1-G200. After the G200 drive is completed, the touch display device enters the first touch stage scanning state from the display state. At the same time, the GOA on the left does not pause, but continues to pass to the back, that is, pseudo drive scanning, but the Gate output does not enter the effective display area AA, that is, Figure 1 Medium G_TP1-G_TPN.
[0032] like Figure 9 , Figure 9This is a schematic diagram of a specific embodiment of the touch display device in the present application. After the first touch stage scan is completed, the GOA_R on the right starts driving the gate G201-G400 rows in the second display stage. After completing the gate output drive of the G400 row, the touch display device enters the second touch stage scan state from the display. At the same time, the GOA output on the right continues to be transmitted without pausing, but performs a pseudo drive scan. However, the Gate output does not enter the AA effective display area, that is, Figure 1 G_TPN+1-G_TPN+X in.
[0033] After the second touch stage scan is completed, the GOA circuit on the left just completes the scan of G_TPN, and then the P point potential of this row is transmitted to the start signal of G401, and then begins to be transmitted backward and output to the G600 row, and so on, completing the display and touch scan of the entire panel.
[0034] Step 200: When the first touch phase ends and the second display phase begins, starting from the last gate line of the first drive scan, a second drive scan is performed on a first specified number of gate lines in a second direction, and after entering the second touch phase, the GOA circuit is continued to drive the output level signal to perform a pseudo drive scan in the second direction.
[0035] In one possible implementation, Figure 6 , Figure 6 yes Figure 1 FIG. 2 is a flow chart of a specific embodiment of step 200; step 200 includes: Step 210: After the second display stage begins, the second gate line scan module corresponding to the second display stage is scanned row by row in the second direction; Step 220: When the second display stage ends and the second touch stage begins, the GOA circuit of the last row of the second gate line scan module of the second drive scan is driven to output a level signal for a pseudo drive scan in the second direction.
[0036] In one possible implementation, Figure 7 , Figure 7 yes Figure 6A flow chart of a specific embodiment of step 220 in the embodiment; step 220 includes: step 221, after the second touch phase begins, the GOA circuit drive output level signal of the last row of the second gate line scan module of the second drive scan is transmitted to the GOA circuit of the next row; step 222, in the second touch phase, after the GOA circuit of the next row receives the GOA circuit drive output level signal, the gate drive output is turned off, and the GOA circuit drive output level signal is continued to be transmitted to the GOA circuit of the next row; step 223, steps 221-222 are repeated until the second touch phase ends. Step 300, steps 100-200 are repeated; The scanning direction of the first direction is opposite to the scanning direction of the second direction.
[0037] In an embodiment of the present application, by dividing the gate lines of the display device into blocks, performing display drive scanning in two directions, and after the display phase ends and the touch phase begins, the GOA circuit drive output level signal is pseudo-driven and scanned and transmitted. In the touch phase, the high-level signal of the GOA circuit is not paused, which solves the leakage problem of the level signal holding point and helps to avoid the appearance of horizontal stripes on the display.
[0038] Figure 1 The two dotted arrows in the middle indicate that the application method does not pause the GOA circuit, point P does not leak electricity, the GOA is in a state of continuous transmission, and the left and right GOAs are distinguished, avoiding the appearance of horizontal stripes in the touch display device at the display and touch conversion position, thereby improving display quality and consumer experience, and enhancing product competitiveness.
[0039] In a second aspect, a touch display device, such as Figure 8 , Figure 8 : It is a schematic diagram of the module structure of a touch display device; the GOA driving method of the touch display device of the first aspect includes a control module and an array circuit; the array circuit includes multiple GOA circuits and multiple gate line scanning modules; the multiple GOA circuits are divided into multiple GOA circuit groups; the multiple GOA circuit groups are electrically connected to the left and right sides of the multiple gate line scanning modules alternately in sequence; the control module is electrically connected to the array circuit through the multiple GOA circuits, and is used to, in a first display stage, perform a first drive scan in a first direction on a first specified number of gate lines, and continue to drive the GOA circuit output level signal to perform a pseudo drive scan in the first direction after entering the first touch stage, and when the first touch stage ends and the second display stage begins, start from the last gate line of the first drive scan, perform a second drive scan in a second direction on the first specified number of gate lines, and continue to drive the GOA circuit output level signal to perform a pseudo drive scan in the second direction after entering the second touch stage, wherein the scanning direction of the first direction is opposite to the scanning direction of the second direction.
[0040] Furthermore, the control module is further used to: in the first display stage, scan the first gate line scan module line by line in the first direction, and when the first display stage ends and the first touch stage begins, drive the GOA circuit output level signal of the last row of the first gate line scan module of the first drive scan to perform a pseudo drive scan in the first direction.
[0041] Furthermore, the control module is further used to: after the first touch stage begins, pass the GOA circuit drive output level signal of the last row of the first gate line scan module of the first drive scan to the GOA circuit of the next row; in the first touch stage, after the GOA circuit of the next row receives the GOA circuit drive output level signal, it turns off the gate drive output and continues to pass the GOA circuit drive output level signal to the GOA circuit of the next row until the first touch stage ends.
[0042] Furthermore, the control module is further used to: after the second display stage begins, perform row-by-row scanning on the second gate line scanning module corresponding to the second display stage in the second direction; when the second display stage ends and the second touch stage begins, drive the GOA circuit of the last row of the second gate line scanning module of the second drive scan to output a level signal for pseudo drive scanning in the second direction.
[0043] The GOA driving method and touch display device of the present invention divide the gate lines of the display device into blocks, perform display drive scanning in two directions, and perform pseudo drive scanning and transmission on the GOA circuit drive output level signal after the display phase ends and the touch phase begins. The high level signal of the GOA circuit is not paused during the touch phase, thereby solving the leakage problem of the level signal holding point and facilitating the avoidance of horizontal stripes on the display.
[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A GOA driving method for a touch display device, characterized in that: include: Step 100: In a first display phase, a first drive scan is performed on a first predetermined number of gate lines in a first direction, and after entering a first touch phase, the GOA circuit is driven to output a level signal to perform a dummy drive scan in the first direction. Step 200: When the first touch phase ends and the second display phase begins, starting from the last gate line of the first drive scan, a second drive scan is performed on the first predetermined number of gate lines in a second direction, and after entering the second touch phase, the GOA circuit is driven to output a level signal to perform a dummy drive scan in the second direction. Step 300, repeat steps 100-200; The scanning direction of the first direction is opposite to the scanning direction of the second direction.
2. The GOA driving method of the touch display device according to claim 1, wherein: The step 100 includes: Step 110: Acquire all gate lines of the touch display device; Step 120 : Divide all gate lines into a plurality of gate line scanning blocks including the first specified number of gate lines according to the display phase scanning time.
3. The GOA driving method of the touch display device according to claim 2, wherein: The step 100 further includes: Step 130 : In the first display stage, the first gate line scanning module is subjected to line-by-line scanning in a first direction; Step 140 : When the first display phase ends and the first touch phase begins, the GOA circuit of the last row of the first gate line scan module of the first drive scan is driven to output a level signal to perform a dummy drive scan in the first direction.
4. The GOA driving method of the touch display device according to claim 3, wherein: The step 140 includes: Step 141: After the first touch control phase begins, the GOA circuit driving output level signal of the last row of the first gate line scanning module of the first drive scan is transmitted to the GOA circuit of the next row; Step 142: In the first touch stage, after receiving the GOA circuit drive output level signal, the GOA circuit in the next row turns off the gate drive output and continues to transmit the GOA circuit drive output level signal to the GOA circuit in the next row; Step 143: Repeat steps 141-142 until the first touch control phase ends.
5. The GOA driving method of the touch display device according to claim 1, wherein: The step 200 includes: Step 210: After the second display phase begins, perform line-by-line scanning in a second direction on a second gate line scanning module corresponding to the second display phase; Step 220 : When the second display phase ends and the second touch phase begins, the GOA circuit of the last row of the second gate line scan module of the second drive scan is driven to output a level signal to perform a dummy drive scan in the second direction.
6. The GOA driving method of the touch display device according to claim 5, wherein: The step 220 includes: Step 221: After the second touch control phase begins, the GOA circuit driving output level signal of the last row of the second gate line scanning module of the second drive scan is transmitted to the GOA circuit of the next row; Step 222: In the second touch stage, after receiving the GOA circuit drive output level signal, the GOA circuit in the next row turns off the gate drive output and continues to transmit the GOA circuit drive output level signal to the GOA circuit in the next row; Step 223: Repeat steps 221-222 until the second touch control phase ends.
7. A touch display device, using the GOA driving method for a touch display device according to any one of claims 1 to 6, characterized in that: include: Control module; Array circuit; The array circuit includes a plurality of GOA circuits and a plurality of gate line scanning modules; The multiple GOA circuits are divided into multiple GOA circuit groups; The plurality of GOA circuit groups are electrically connected to the left side and the right side of the plurality of gate line scanning modules in alternating order; The control module is electrically connected to the array circuit through the multiple GOA circuits, In the first display stage, a first drive scan is performed on a first specified number of gate lines in a first direction, and after entering the first touch stage, the GOA circuit is continued to drive the output level signal to perform a pseudo drive scan in the first direction. When the first touch stage ends and the second display stage begins, starting from the last gate line of the first drive scan, the first specified number of gate lines are subjected to a second drive scan in a second direction, and after entering the second touch stage, the GOA circuit is continued to drive the output level signal to perform a pseudo drive scan in the second direction, wherein the scanning direction of the first direction is opposite to the scanning direction of the second direction.
8. The touch display device according to claim 7, wherein: The control module is further used to: in the first display stage, scan the first gate line scan module line by line in the first direction, and when the first display stage ends and the first touch stage begins, drive the GOA circuit of the last row of the first gate line scan module of the first drive scan to output a level signal to perform a pseudo drive scan in the first direction.
9. The touch display device according to claim 8, wherein: The control module is further used to: after the first touch stage starts, pass the GOA circuit drive output level signal of the last row of the first gate line scan module of the first drive scan to the GOA circuit of the next row; in the first touch stage, after the GOA circuit of the next row receives the GOA circuit drive output level signal, turn off the gate drive output and continue to pass the GOA circuit drive output level signal to the GOA circuit of the next row until the first touch stage ends.
10. The touch display device according to claim 7, wherein: The control module is further configured to: After the second display stage begins, the second gate line scan module corresponding to the second display stage is scanned row by row in the second direction. When the second display stage ends and the second touch stage begins, the GOA circuit of the last row of the second gate line scan module of the second drive scan is driven to output a level signal to perform a pseudo drive scan in the second direction.