Driving method of touch display screen, cascade circuit and display device
By partitioning the gate driving line of the touch display screen, the horizontal lines problem when switching between display scanning and touch scanning is solved, and the display effect without horizontal lines is achieved.
Patent Information
- Application Number
- CN202510591172.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-08
- Publication Date
- 2025-07-29
AI Technical Summary
When the existing display device switches the display scan and touch scan, the P point potential leakage occurs in the state of the pause of the GOA circuit, resulting in horizontal lines on the display screen.
By partitioning the gate driving lines of all rows of the touch display screen, inputting the left and right start signals to each group of two adjacent gate driving lines respectively, performing display and touch stage scanning, ensuring that touch scanning is performed after each display scan is completed, avoiding P point potential leakage.
It solves the problem of horizontal lines when switching between display scanning and touch scanning, ensures that there is no P point potential leakage in the GOA circuit in the pause state, and achieves the display effect without horizontal lines.
Smart Images
Figure CN120388525A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of horizontal stripe processing of display panels, and particularly relates to a driving method, a cascaded circuit and a display device for a touch display screen. Background Art
[0002] In existing display devices, the VCOM common electrode is simultaneously used as a touch pattern. Within one frame, display and touch are alternately performed. That is, in an existing in-cell display screen, within one frame time, display scanning is first performed, then touch scanning is performed, and then display scanning is performed again, and so on, performing a display scanning-touch scanning cycle until one-frame data scanning is completed. During the touch scanning period, since the GOA (gate on array) circuit is in a holding state during the display stage, the potential at the input terminal (point P) of the output unit in the GOA circuit gradually decreases at this time. After the touch stage ends and returns to the display stage, when point P is transmitted backward, there is a difference in potential from the point P in the normal area display. At this time, a horizontal stripe phenomenon will occur.
[0003] Reference Figure 1 , Figure 2 and Figure 3 , in the existing driving technology during the GOA scanning process, for example, taking a resolution of 720RGB*1600 as an example, the GOA circuit scans and drives in sequence from the first row G1, G2, G3,..., G1599, G1600. During the driving process of G1 to G1600, 5 to 10 groups of touch scanning drives will be performed. Taking 5 touch scans as an example, that is, first perform display scanning of G1, G2, G3,..., G320, the GOA pauses from passing downward and scanning, and at this time touch scanning is performed. After the touch scanning ends, display scanning of G321, G322,..., G640 will be performed again, the GOA pauses, and it is touch scanning again. After the touch scanning ends, G641,... will be performed again, and so on in a cycle to complete the refresh of the entire screen.
[0004] However, in the above GOA pause state, there is leakage of the potential at point P in the GOA circuit, and when the touch is switched to the display state, a horizontal stripe phenomenon appears on the display screen. Summary of the Invention
[0005] In the prior art, when switching between display scanning and touch scanning and the GOA circuit pauses, there is a leakage phenomenon of the potential at point P, resulting in horizontal stripes on the display screen.
[0006] In view of the above problems, a driving method, a cascaded circuit and a display device for a touch display screen are provided. By continuously partitioning the gate driving lines of all rows of the touch display screen at a specified threshold, multiple groups of two adjacent gate driving lines with an interval of the specified threshold are obtained. A left start signal and a right start signal are respectively input to the previous row and the next row of each group of the two adjacent gate driving lines to perform a current display stage scan. After the display stage scan is completed, a current touch stage scan is performed. Each time the display scan completes one-fifth of the entire screen, and then the touch scan is performed. Since there is no leakage of the P-point potential in the entire screen GOA at this time, because all the gates related to this have completed the scan and all GOA outputs are low levels, there is no horizontal stripe phenomenon between two adjacent display stages, solving the problem that when switching between the display scan and the touch scan and the GOA circuit pauses, there is a leakage of the P-point potential, resulting in horizontal stripes on the display screen.
[0007] In a first aspect, a driving method for a touch display screen includes:
[0008] Step 100: Partition the gate driving lines of all rows of the touch display screen at a specified threshold to obtain multiple groups of two adjacent gate driving lines with an interval of the specified threshold. A left start signal and a right start signal are respectively input to the previous row and the next row of each group of the two adjacent gate driving lines to perform a first display stage scan. After the first display stage scan is completed, a first touch stage scan is performed;
[0009] Step 200: After the first touch stage scan is completed, partition the gate driving lines of the remaining rows of the touch display screen at a specified threshold in sequence to obtain multiple groups of two adjacent gate driving lines with an interval of the specified threshold. A left start signal and a right start signal are respectively input to the previous row and the next row of each group of the two adjacent gate driving lines to perform a second display stage scan. After the second display stage scan is completed, a second touch stage scan is performed;
[0010] Step 300: Repeat steps 100-200 to alternately perform display stage scans and touch stage scans.
[0011] In a first possible implementation manner in combination with the driving method for the touch display screen described in the first aspect of the present invention, the step 100 includes:
[0012] Step 110: In the first display stage, input left start signals to the (1 + m)-th row respectively to activate the GOA driving circuits of the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row, and input right start signals to the GOA driving circuits of the 2nd row and the (2 + m)-th row to activate the GOA driving circuits of the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row, and perform display scanning on the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row and the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row respectively;
[0013] Wherein, k is a positive integer, m is a specified threshold value, which is a positive integer greater than the constant 10.
[0014] Combined with the first possible implementation manner of the first aspect of the present invention, in the second possible implementation manner, step 110 includes:
[0015] Step 111: Input first timing pulses to the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row to perform first timing driving on the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row, and perform gate driving scanning on the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row;
[0016] Step 112: Input second timing pulses to the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row to perform second timing driving on the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row, and perform gate driving scanning on the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row;
[0017] Wherein, the high-level pulses of the first timing driving and the high-level pulses of the second timing driving are input at intervals.
[0018] Combined with the second possible implementation manner of the first aspect of the present invention, in the third possible implementation manner, step 111 includes:
[0019] Step 1111: Use the gate driving output of the GOA driving circuit of the (1 + (k - 1)m)-th row as the start signal of the (1 + km)-th row to activate the scanning of the GOA driving circuit of the (1 + km)-th row.
[0020] Combined with the third possible implementation manner of the first aspect of the present invention, in the fourth possible implementation manner, step 111 further includes:
[0021] Step 1112: Output the gate driving of the GOA driving circuit of the (1 + km)-th row to the pull-down unit of the GOA driving circuit of the (1 + (k - 1)m)-th row to activate the pull-down unit of the (1 + (k - 1)m)-th row;
[0022] Step 1113: The pull-down unit of the (1 + (k - 1)m)-th row pulls down the potential at the input terminal of the output unit of the (1 + (k - 1)m)-th row.
[0023] Combined with the first possible implementation manner of the first aspect of the present invention, in the fifth possible implementation manner, the step 112 includes:
[0024] Step 1121: Use the gate drive output of the GOA drive circuit of the (2 + (k - 1)m)-th row as the start signal of the (2 + km)-th row to start the scanning of the GOA drive circuit of the (2 + km)-th row.
[0025] Combined with the fifth possible implementation manner of the first aspect of the present invention, in the sixth possible implementation manner, the step 112 further includes:
[0026] Step 1122: Output the gate drive of the GOA drive circuit of the (2 + km)-th row to the pull-down unit of the GOA drive circuit of the (2 + (k - 1)m)-th row to start the pull-down unit of the (2 + (k - 1)m)-th row;
[0027] Step 1123: The pull-down unit of the (2 + (k - 1)m)-th row pulls down the potential at the input terminal of the output unit of the (2 + (k - 1)m)-th row.
[0028] In the second aspect, a cascading circuit of a touch display screen, adopting the driving method of the touch display screen described in the first aspect, includes:
[0029] Multiple GOA drive circuit units and GOA signal units;
[0030] The GOA signal unit is electrically connected to the multiple GOA drive circuit units in sequence;
[0031] The GOA signal unit includes a forward scan signal line, a reverse scan signal line, a clock signal line, and a low-level signal line. The forward scan signal line, the reverse scan signal line, the clock signal line, and the low-level signal line are respectively electrically connected to the forward scan signal input terminal, the reverse scan signal input terminal, the clock signal input terminal, and the low-level signal input terminal of the GOA drive circuit unit;
[0032] Wherein, the GOA signal unit further includes a left start signal line and a right start signal line. The left start signal line is respectively electrically connected to the start signal input terminals of the previous row in each group of two adjacent gate drive lines in the current display stage, and the right start signal line is respectively electrically connected to the start signal input terminals of the next row in each group of two adjacent gate drive lines in the current display stage;
[0033] The left start signal line and the right start signal line are used to input a left start signal to the previous row and a right start signal to the next row in each group of the two adjacent gate driver lines in the current display stage, respectively, for scanning in the current display stage.
[0034] Combined with the cascade circuit of the touch display screen described in the second aspect of the present invention, in a first possible implementation manner, the clock signal line includes a left clock signal line and a right clock signal line. The left clock signal line is used to input a first timing pulse to the previous row in each group of the two adjacent gate driver lines in the current display stage, and the right clock signal line is used to input a second timing pulse to the next row in each group of the two adjacent gate driver lines in the current display stage. Among them, the high-level pulses of the first timing drive and the high-level pulses of the second timing drive are input at intervals.
[0035] In a third aspect, a display device includes the cascade circuit of the touch display screen described in the second aspect.
[0036] Implementing the driving method, cascade circuit and display device of the touch display screen of the present invention, by continuously partitioning the gate driver lines of all rows of the touch display screen at a specified threshold, obtaining multiple groups of two adjacent gate driver lines at intervals of the specified threshold, and respectively inputting a left start signal and a right start signal to the previous row and the next row in each group of the two adjacent gate driver lines for scanning in the current display stage. After the display stage scanning is completed, the current touch stage scanning is performed. Each time the display scanning completes one-fifth of the entire screen, and then the touch scanning is performed. Since there is no leakage of the P-point potential in the entire screen GOA at this time, because all the relevant gates have completed scanning at this time and all GOA outputs are low levels, there is no horizontal stripe phenomenon between adjacent two display stages, solving the problem that when switching between display scanning and touch scanning and the GOA circuit pauses, there is a leakage phenomenon of the P-point potential, resulting in horizontal stripes on the display screen. Description of the Drawings
[0037] 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. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0038] Figure 1 is a schematic diagram of a GOA driving circuit in the prior art;
[0039] Figure 2 is a schematic diagram of the alternation between the touch stage and the reality stage in the prior art;
[0040] Figure 3 is a schematic diagram of a driving timing in the prior art;
[0041] Figure 4 is a schematic diagram of a driving timing in the present application;
[0042] Figure 5 is a schematic flow diagram of a specific embodiment of the driving method of the touch display screen in the present application;
[0043] Figure 6 is a schematic flow diagram of a specific embodiment of step 110 in the driving method of the touch display screen in the present application;
[0044] Figure 7 is a schematic flow diagram of a specific embodiment of step 111 in ;
[0045] Figure 8 is a schematic flow diagram of a specific embodiment of step 112 in ;
[0046] Figure 9 is a schematic diagram of the cascade circuit of the touch display screen in the present application. Detailed Embodiments
[0047] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the accompanying drawings in the invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.
[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0049] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.
[0050] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0051] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.
[0052] In the prior art, when switching between display scanning and touch scanning and the GOA circuit pauses, there is a leakage phenomenon in the potential of point P, resulting in horizontal stripes on the display screen.
[0053] In view of the above problems, a driving method, a cascaded circuit and a display device for a touch display screen are proposed.
[0054] In a first aspect, a driving method for a touch display screen is as Figure 5 , Figure 5 is a schematic flow chart of a specific embodiment of the driving method for the touch display screen in the present application; it includes:
[0055] Step 100: Partition the gate driving lines of all rows of the touch display screen with a specified threshold to obtain multiple sets of two adjacent gate driving lines with a specified threshold interval. Input a left start signal and a right start signal to the previous row and the next row in each set of two adjacent gate driving lines respectively to perform the first display stage scanning. After the first display stage scanning is completed, perform the first touch stage scanning.
[0056] In a preferred embodiment, step 100 includes:
[0057] Step 110: In the first display stage, input a left start signal to the (1 + m)-th row respectively to start the GOA driving circuits of the 1st row, (1 + m)-th row, (1 + 2m)-th row,..., (1 + km)-th row, and input a right start signal to the GOA driving circuit of the (2 + m)-th row to start the GOA driving circuits of the 2nd row, (2 + m)-th row, (2 + 2m)-th row,..., (2 + km)-th row, and perform display scanning on the (1 + m)-th row, (1 + 2m)-th row,..., (1 + km)-th row and the (2 + m)-th row, (2 + 2m)-th row,..., (2 + km)-th row respectively;
[0058] Among them, k is a positive integer, m is a specified threshold value, which is a positive integer greater than the constant 10.
[0059] In this embodiment, in the first display stage, the first row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row, the second row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row can be divided into rows G1, G2, G11, G12, ……, G1591, G1592.
[0060] In a preferred embodiment, as Figure 6 , Figure 6 is a schematic flow diagram of a specific embodiment of step 110 in the driving method of the touch display screen in this application; step 110 includes:
[0061] Step 111: Input a first timing pulse to the first row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row to perform first timing driving on the first row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row, and perform gate driving scanning on the first row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row.
[0062] In a preferred embodiment, step 111 includes: step 1111: Use the gate driving output of the GOA driving circuit of the (1 + (k - 1)m)-th row as the start signal of the (1 + km)-th row to start the scanning of the GOA driving circuit of the (1 + km)-th row.
[0063] In this embodiment, the gate driving output of the previous row is used as the start signal of the next row. For example, the gate driving output of row G1 is used as the start signal of row G11, and the gate driving output of row G11 is used as the start signal of row G21, and so on.
[0064] In a preferred embodiment, as Figure 7 , Figure 7 is a schematic flow diagram of a specific embodiment of step 111 in 6;
[0065] Step 111 further includes: step 1112: Output the gate driving of the GOA driving circuit of the (1 + km)-th row to the pull-down unit of the GOA driving circuit of the (1 + (k - 1)m)-th row to start the pull-down unit of the (1 + (k - 1)m)-th row; step 1113: The pull-down unit of the (1 + (k - 1)m)-th row pulls down the potential of the input end of the output unit of the (1 + (k - 1)m)-th row.
[0066] In this embodiment, the gate driving output of the next row is used to start the pull-down unit of the previous row. For example, the gate driving output of row G11 is used as the start signal of the pull-down unit of row G1, and the gate driving output of row G21 is used as the start signal of the pull-down unit of row G11, and so on.
[0067] Step 112: Input a second timing pulse to the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row to perform second timing driving on the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row, and perform gate driving scanning on the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row;
[0068] Among them, the high-level pulses of the first timing driving and the high-level pulses of the second timing driving are input at intervals.
[0069] In a preferred embodiment, step 112 includes: Step 1121: Use the gate driving output of the GOA driving circuit of the (2 + (k - 1)m)-th row as the start signal of the (2 + km)-th row to start the scanning of the GOA driving circuit of the (2 + km)-th row.
[0070] In a preferred embodiment, as Figure 8 , Figure 8 is a schematic flow diagram of a specific embodiment of step 112 in 6; step 112 further includes: Step 1122: Output the gate driving of the GOA driving circuit of the (2 + km)-th row to the pull-down unit of the GOA driving circuit of the (2 + (k - 1)m)-th row to start the pull-down unit of the (2 + (k - 1)m)-th row; Step 1123: The pull-down unit of the (2 + (k - 1)m)-th row pulls down the potential of the input terminal of the output unit of the (2 + (k - 1)m)-th row.
[0071] Step 200: After the scanning of the first touch stage is completed, partition the gate driving lines of all rows of the remaining touch display screen in sequence according to a specified threshold, obtain multiple groups of two adjacent gate driving lines with an interval of the specified threshold, input a left start signal and a right start signal to the previous row and the next row of each group of two adjacent gate driving lines respectively, perform second display stage scanning, and after the second display stage scanning is completed, perform second touch stage scanning.
[0072] In this embodiment, partitioned driving scanning can be performed according to the driving scanning method of the first display stage.
[0073] Step 300: Repeat steps 100 - 200 to alternately perform display stage scanning and touch stage scanning.
[0074] In the embodiment of this application, as Figure 4 , Figure 4It is a driving timing schematic diagram in this application. Within one frame time, the display term and the touch term alternate. First, one-fifth of the data of the entire screen is refreshed. First, the first group of data is refreshed. In the first display stage, that is, the gate line scanning of rows G1, G2, G11, G12, ……, G1591, G1592 is started first. Specifically, when performing driving scanning, the GOA circuit of row G1 is started by the start signal STV1L. Then, it is sequentially transmitted backward in the order of G1, G11, …, G1591. Similarly, the GOA circuit of row G2 is started by the start signal STV1R, and then it is sequentially transmitted backward in the order of G2, G12, …, G1592.
[0075] Among them, STV1L, STV2L, STV3L, STV4L, STV5L can be completed through the start signal lines on the left side, and STV1R, STV2R, STV3R, STV4R, STV5R can be completed through the start signal lines on the right side. CK1L, CK2L, CK3L, CK4L, CK5L are the first timing pulses output by the clock signal lines, and CK1R, CK2R, CK3R, CK4R, CK5R are the second timing pulses output by the clock signal lines. In each group of data, the high-level pulses of the first timing pulses and the high-level pulses of the second timing pulses are input at intervals.
[0076] According to the above principle, the driving scanning of the second display stage is performed, and the refreshing of the second group of data is started in sequence: scanning and driving rows G3, G4, G13, G14, ……, G1593, G1594;
[0077] The driving scanning of the third display stage is performed, and the refreshing of the third group of data is performed in sequence: scanning and driving rows G5, G6, G15, G16, ……, G1595, G1596;
[0078] The driving scanning of the fourth display stage is performed, and the refreshing of the fourth group of data is performed in sequence: scanning and driving rows G7, G8, G18, G18, ……, G1597, G1598;
[0079] Perform the driving scan in the fifth display stage and refresh the fifth group of data in sequence: scan and drive rows G9, G10, G19, G20, ……, G1599, G1600. By continuously partitioning the gate driving lines of all rows of the touch display screen with a specified threshold, multiple groups of two adjacent gate driving lines with a specified threshold interval are obtained. The left start signal and the right start signal are respectively input to the previous row and the next row in each group of the two adjacent gate driving lines, and the current display stage scan is performed. After the display stage scan is completed, the current touch stage scan is performed. Each time the display scan completes one-fifth of the entire screen, and then the touch scan is performed. Since there is no leakage of the P-point potential in the entire screen GOA at this time, because all the gates related to this have completed the scan and all GOA outputs are low levels, there is no horizontal stripe phenomenon between two adjacent display stages, solving the problem that when switching between the display scan and the touch scan and the GOA circuit pauses, there is a leakage of the P-point potential, resulting in horizontal stripes on the display screen.
[0080] In a second aspect, a cascaded circuit of a touch display screen adopts the driving method of the touch display screen in the first aspect, as Figure 9 , Figure 9 is a schematic diagram of the cascaded circuit of the touch display screen in this application, including: multiple GOA driving circuit units and a GOA signal unit; the GOA signal unit is electrically connected to the multiple GOA driving circuit units in sequence; the GOA signal unit includes a forward scan signal line, a reverse scan signal line, a clock signal line, and a low-level signal line. The forward scan signal line, the reverse scan signal line, the clock signal line, and the low-level signal line are respectively electrically connected to the forward scan signal input terminal, the reverse scan signal input terminal, the clock signal input terminal, and the low-level signal input terminal of the GOA driving circuit unit; wherein, the GOA signal unit further includes a left start signal line and a right start signal line. The left start signal line is respectively electrically connected to the start signal input terminal of the previous row in each group of two adjacent gate driving lines in the current display stage, and the right start signal line is respectively electrically connected to the start signal input terminal of the next row in each group of two adjacent gate driving lines in the current display stage; the left start signal line and the right start signal line are used to respectively input the left start signal to the previous row and the right start signal to the next row in each group of two adjacent gate driving lines in the current display stage to perform the current display stage scan.
[0081] Further, the clock signal line includes a left clock signal line and a right clock signal line. The left clock signal line is used to input a first timing pulse to the previous row in each group of two adjacent gate driving lines in the current display stage, and the right clock signal line is used to input a second timing pulse to the next row in each group of two adjacent gate driving lines in the current display stage. Among them, the high-level pulses of the first timing drive and the high-level pulses of the second timing drive are input at intervals.
[0082] In a third aspect, a display device includes a cascade circuit of the touch display screen of the second aspect.
[0083] By implementing the driving method, cascade circuit and display device of the touch display screen of the present invention, all gate driving lines of the touch display screen are partitioned continuously at a specified threshold to obtain multiple groups of two adjacent gate driving lines spaced at the specified threshold. A left start signal and a right start signal are respectively input to the previous row and the next row in each group of two adjacent gate driving lines for the current display stage scanning. After the display stage scanning is completed, the current touch stage scanning is performed. Each time the display scanning completes one-fifth of the entire screen, and then the touch scanning is performed. Since there is no leakage of the P-point potential in the entire screen GOA at this time, because all the gates related thereto have completed scanning and all GOA outputs are low levels, there is no horizontal stripe phenomenon between two adjacent display stages, solving the problem that when switching between the display scanning and the touch scanning and the GOA circuit pauses, there is a leakage of the P-point potential, resulting in horizontal stripes on the display screen.
[0084] The above are only the 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 principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A driving method for a touch display screen, characterized in that, Including: Step 100: Partition the gate drive lines of all rows of the touch display screen at a specified threshold, obtain multiple groups of two adjacent gate drive lines spaced at the specified threshold, respectively input a left start signal and a right start signal to the previous row and the next row of each group of the two adjacent gate drive lines, perform a first display stage scan, and after the first display stage scan ends, perform a first touch stage scan; Step 200: After the first touch stage scan ends, sequentially partition the gate drive lines of all remaining rows of the touch display screen at the specified threshold, obtain multiple groups of two adjacent gate drive lines spaced at the specified threshold, respectively input a left start signal and a right start signal to the previous row and the next row of each group of the two adjacent gate drive lines, perform a second display stage scan, and after the second display stage scan ends, perform a second touch stage scan; Step 300: Repeat steps 100 - 200, alternately performing display stage scans and touch stage scans.
2. The driving method of the touch display screen according to claim 1, wherein The said step 100 includes: Step 110: In the first display stage, respectively input a left start signal to the (1 + m)-th row to start the GOA drive circuits of the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row, and input a right start signal to the GOA drive circuits of the 2nd row and the (2 + m)-th row to start the GOA drive circuits of the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row, and respectively perform display scans on the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row and the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row; Wherein, k is a positive integer, m is the specified threshold, which is a positive integer greater than the constant 10.
3. The driving method of the touch display screen according to claim 2, wherein The said step 110 includes: Step 111: Input a first timing pulse to the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row to perform a first timing drive on the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row, and perform a gate drive scan on the 1st row, the (1 + m)-th row, the (1 + 2m)-th row, …, the (1 + km)-th row; Step 112: Input a second timing pulse to the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row to perform a second timing drive on the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row, and perform a gate drive scan on the 2nd row, the (2 + m)-th row, the (2 + 2m)-th row, …, the (2 + km)-th row; Wherein, the high-level pulses of the first timing drive and the high-level pulses of the second timing drive are input at intervals.
4. The driving method of the touch display screen according to claim 3, wherein The said step 111 includes: Step 1111: Use the gate drive output of the GOA drive circuit of the (1 + (k - 1)m)-th row as the start signal of the (1 + km)-th row to start the GOA drive circuit scan of the (1 + km)-th row.
5. The driving method of the touch display screen according to claim 4, characterized in that, The said step 111 further includes: Step 1112: Output the gate drive of the GOA drive circuit of the (1 + km)-th row to the pull-down unit of the GOA drive circuit of the (1 + (k - 1)m)-th row to start the pull-down unit of the (1 + (k - 1)m)-th row. Step 1113: The pull-down unit of the (1+(k-1)m)-th row pulls down the potential at the input terminal of the output unit of the (1+(k-1)m)-th row.
6. The driving method of the touch display screen according to claim 3, wherein The said Step 112 includes: Step 1121: Use the gate drive output of the GOA drive circuit of the (2+(k-1)m)-th row as the start signal for the (2+km)-th row to start the scanning of the GOA drive circuit of the (2+km)-th row.
7. The driving method of the touch display screen according to claim 6, characterized in that, The said Step 112 further includes: Step 1122: Output the gate drive of the GOA drive circuit of the (2+km)-th row to the pull-down unit of the GOA drive circuit of the (2+(k-1)m)-th row to activate the pull-down unit of the (2+(k-1)m)-th row; Step 1123: The pull-down unit of the (2+(k-1)m)-th row pulls down the potential at the input terminal of the output unit of the (2+(k-1)m)-th row.
8. A cascading circuit of a touch display screen, adopting the driving method of the touch display screen according to any one of claims 1-7, characterized in that, It includes: Multiple GOA drive circuit units and GOA signal units; The said GOA signal units are electrically connected to the multiple GOA drive circuit units in sequence; The said GOA signal unit includes a forward scan signal line, a reverse scan signal line, a clock signal line, and a low-level signal line. The forward scan signal line, reverse scan signal line, clock signal line, and low-level signal line are electrically connected to the forward scan signal input terminal, reverse scan signal input terminal, clock signal input terminal, and low-level signal input terminal of the GOA drive circuit unit respectively; Wherein, the said GOA signal unit further includes a left start signal line and a right start signal line. The left start signal line is electrically connected to the start signal input terminal of the previous row in each group of the two adjacent gate drive lines in the current display stage respectively. The right start signal line is electrically connected to the start signal input terminal of the next row in each group of the two adjacent gate drive lines in the current display stage respectively; The left start signal line and the right start signal line are used to input a left start signal to the previous row and a right start signal to the next row in each group of the two adjacent gate drive lines in the current display stage respectively for scanning in the current display stage.
9. The cascade circuit of the touch display screen according to claim 8, characterized in that, The said clock signal line includes a left clock signal line and a right clock signal line. The left clock signal line is used to input a first timing pulse to the previous row in each group of the two adjacent gate drive lines in the current display stage. The right clock signal line is used to input a second timing pulse to the next row in each group of the two adjacent gate drive lines in the current display stage. Among them, the high-level pulses of the first timing drive and the high-level pulses of the second timing drive are input at intervals.
10. A display device, characterized in that, It includes the cascade circuit of the touch display screen described in any one of Claims 8-9.