Display touch time-sharing driving method of embedded touch display panel and display

Abstract

The invention relates to a display touch time-sharing driving method of an embedded touch display panel and a display, which change the gate line number in each display block frame by frame in each cycle period, so that each line of gate can become the first line of gate after the completion of touch driving of the block in one cycle period, thereby achieving the balance of the overall display effect and improving the display quality. The GOA circuit design of the liquid crystal display panel does not need to be changed, and only the driving mode of the chip needs to be improved according to the design, so that the problem of cross grains at a fixed position on the liquid crystal display panel is eliminated on the basis of not increasing the cost of the display panel, and the display effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of display touch technology, and relates to a display touch time-division driving method and display with an embedded touch display panel. Background Technology

[0002] FIC (Full In-Cell Touch) technology needs to ensure both normal LCD display and normal touch operation, requiring minimal interference between the two. Therefore, time-division driving is necessary within a single frame. Furthermore, to improve the touch reporting rate, LCD driving and touch driving alternate within a single display frame. This driving method ensures that touch is driven two or more times within a single frame, thereby increasing the touch reporting rate and improving the touch performance. Current LCD panels use GOA (Gate On Array, meaning the gate driving circuit is directly integrated onto the array substrate (the glass layer of the TFT pixel array)) driving method for the gate (row lines), replacing the previous Gate Driver IC (row driver chip). Each row gate's GOA unit in the LCD display has a capacitor that pre-charges the gate output voltage of that row one row ahead of time.

[0003] As described above, in the time-sharing driving technology that alternates between display and touch, the opening and pre-charge time of each row gate are the same during each display block (segment). However, after the touch drive ends, the GOA pre-charge of the first row gate of the corresponding display block occurs during the output of the last row gate of the previous display block. Therefore, there is an interval of one touch drive block time. This causes the stored pre-charge voltage of the GOA unit of that gate to decrease because the capacitor storing this pre-charge voltage will slowly discharge during the previous touch drive, resulting in a lower driving voltage for that row gate compared to its row gate. Ultimately, this leads to horizontal lines appearing in the first row of the display block. For the entire LCD panel, horizontal lines will appear in the first row of each display block. Therefore, how to eliminate horizontal lines in fixed positions on the LCD panel to improve the display effect has become one of the technical problems to be solved. Summary of the Invention

[0004] To address the problems existing in the above-mentioned traditional methods, this invention proposes a time-sharing driving method for display touch on an embedded touch display panel and an embedded touch display, which can eliminate horizontal lines at fixed positions on the liquid crystal display panel and improve the display effect.

[0005] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions: On the one hand, a time-division driving method for display touch control of an embedded touch display panel is provided, including the following steps: After the embedded touch display panel is powered on, it enters the display and touch time-sharing drive of the current cycle; Within the current loop cycle, the first frame display time is driven by M lines of gate drivers for each display block; M is a positive integer. Starting from the second frame display time, the number of gate driver outputs in each display block is changed frame by frame, so that each row of gates in the current cycle will become the first row of gates after the touch driver block ends.

[0006] In one embodiment, the process of changing the number of gate driver outputs within each display block frame by frame, starting from the display time of the second frame, includes: Starting from the second frame display time, adjust the number of gate driver outputs within each display block of each frame display time according to an arithmetic sequence; the arithmetic sequence is M+(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0007] In one embodiment, the process of changing the number of gate driver outputs within each display block frame by frame, starting from the display time of the second frame, includes: Starting from the second frame display time, adjust the number of gate driver outputs within each display block of each frame display time according to an arithmetic sequence; the arithmetic sequence is M-(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0008] On the other hand, an embedded touch display is also provided. After the embedded touch display panel of the embedded touch display is powered on, the gate drive circuit of the embedded touch display enters the display and touch time-sharing drive of the current cycle. Within the current loop cycle, the Gate driver circuit executes the drive for the first frame display time according to M lines of gate drive for each display block; M is a positive integer; Starting from the second frame display time, the Gate driver circuit changes the number of gate driver outputs in each display block frame by frame, so that each row of gates in the current cycle will become the first row of gates after the touch driver block ends.

[0009] In one embodiment, starting from the second frame display time, the Gate drive circuit adjusts the number of gate drive outputs within each display block of each frame display time according to an arithmetic sequence; the arithmetic sequence is M+(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0010] In one embodiment, starting from the second frame display time, the number of gate drive outputs within each display block in each frame display time is adjusted according to an arithmetic sequence; the arithmetic sequence is M-(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0011] One of the above technical solutions has the following advantages and beneficial effects: The aforementioned embedded touch display panel's time-sharing driving method and display achieve a balanced overall display effect by changing the number of gate rows in each display block frame by frame within each cycle. This ensures that each gate row becomes the first gate row after the touch driving block ends within a cycle. No changes are needed to the GOA circuit design of the LCD panel; only the chip's driving method needs to be improved according to the design. This eliminates the problem of horizontal lines in fixed positions on the LCD panel without increasing the cost of the display panel, thereby improving the display effect. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the 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.

[0013] Figure 1 This is a flowchart illustrating a time-sharing method for driving display touch on an embedded touch display panel in one embodiment. Figure 2 This is a schematic diagram illustrating the time-sharing drive of display and touch control in an LCD panel with embedded touch functionality. Figure 3 This is a schematic diagram of the GOA circuit structure of a liquid crystal display panel. Figure 4 This is a schematic diagram of a display touch time-division driving scheme for an embedded touch display panel in one embodiment; Figure 5 This is a timing diagram showing a touch time-sharing driving scheme in one embodiment; Figure 6 This is a schematic diagram of a display touch time-sharing driving scheme for an embedded touch display panel in another embodiment; Figure 7 This is a timing diagram of a time-division driving method for display touch control of an embedded touch display panel in another embodiment; Figure 8This is a schematic diagram of the main module configuration of an embedded touch display in one embodiment. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. 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 in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0015] It should be noted that, in this document, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The presentation of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will understand that the embodiments described herein can be combined with other embodiments. The term "and / or" as used herein refers to any combination of one or more of the associated listed items, and all possible combinations, including such combinations.

[0016] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0017] In one embodiment, such as Figure 1 As shown, a time-sharing driving method for display touch control of an embedded touch display panel is provided, which may include the following driving steps S10 to S14: S10, after the embedded touch display panel is powered on, enters the display and touch time-sharing drive of the current cycle; S12, within the current loop cycle, the first frame display time is driven by M lines of gate drivers for each display block; M is a positive integer; S14, starting from the second frame display time, change the number of gate drive outputs in each display block frame by frame, so that each row of gates in the current cycle will become the first row of gates after the touch drive block ends.

[0018] Understandable. Figure 2This is a schematic diagram of the time-sharing drive for display and touch in an embedded touch LCD panel: the gate drive of the LCD display is evenly divided into M rows for each block, and then touch drive is performed between two adjacent display blocks. In this way, touch drive can be performed 2 or more times within one frame of display time, thereby improving the touch reporting rate and the touch effect of the embedded touch LCD; M is a positive integer, where Touch Period is the touch period corresponding to the touch drive block, and Display Period is the display drive period corresponding to the display block.

[0019] Figure 3 This is a schematic diagram of the GOA circuit structure of a liquid crystal display panel. Each row consists of TFT switches M1 to M4, capacitor C, input terminal INPUT, output terminal OUTPUT, clock CLK, ground VSS, and reset terminal RESET. The traditional time-division multiplexing method for display and touch control fixes each display block as M rows within each frame's display time. The touch drive block is located between rows M and M+1. When row M is turned on, the gate output of row M is sent to row M+1. Figure 3 The PH point in row M+1 is pre-charged, but because the clock CLK is pulled low after row M is displayed and the touch driver block is entered, the capacitor C used to store the voltage of the PH point in row M+1 will leak to the VSS terminal through the TFT (Thin Film Transistor) switch M2 during this period. As a result, when row M+1 is turned on, the gate voltage of the TFT switch M2 used to turn on the gate of row M+1 decreases, which causes the voltage output of row M+1 to not reach the highest voltage of the clock CLK. Consequently, the display of row M+1 is abnormal compared to the output of the previous M rows, that is, horizontal stripes are displayed.

[0020] For the entire LCD panel, there is a problem of horizontal lines appearing in the first row of each display block. Therefore, during a full frame of display, horizontal lines will appear in the first row of each display block. This embodiment designs a new time-division driving scheme for display touch, which changes the number of gate rows in each display block frame by frame within a cycle. This ensures that each gate row becomes the first gate row after the touch driving block ends within a cycle, thereby eliminating the horizontal line problem in the embedded touch LCD panel.

[0021] The aforementioned time-division driving method for embedded touch display panels changes the number of gate rows in each display block frame by frame within each cycle, ensuring that each gate row becomes the first gate row after the touch driving block ends within a cycle. This achieves a balanced overall display effect without altering the GOA circuit design of the LCD panel. Only the chip driving method needs to be improved according to the design, thereby eliminating the problem of horizontal lines in fixed positions on the LCD panel without increasing the cost of the display panel, thus improving the display effect.

[0022] In one embodiment, regarding step S14 above, the process of changing the number of gate driver outputs within each display block frame by frame starting from the second frame display time may specifically include the following driver processing: Starting from the second frame display time, adjust the number of gate driver outputs within each display block of each frame display time according to an arithmetic sequence; the arithmetic sequence is M+(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0023] Understandable. Figure 4 This embodiment provides a time-division driving scheme for the embedded touch display panel. In the first frame, each display block has M rows of gate driving. Starting from the second frame, each display block has N (N=1, 2…) rows of gate driving output. Then, starting from the third frame, each display block has M+N rows of gate driving output, and so on, with an arithmetic sequence M+(k…). 1) The number of gate driver outputs in each display block is increased frame by frame in the ×N method. In this way, the opening position of the first line of each display block is no longer fixed within a display cycle. This allows each line of gate driver output to take turns as the first line in the display block frame by frame, thereby ensuring the consistency of the display within the display cycle and eliminating the horizontal stripe problem caused by the previous fixed opening position.

[0024] Figure 5 This is a timing diagram corresponding to the time-sharing driving scheme for the embedded touch display panel provided in this embodiment. This timing diagram can be used to intuitively demonstrate the time-sharing driving method of the time-sharing driving scheme for the display touch display panel. Figure 5 In this context, Touch refers to the touch timing sequence, and Display refers to the display timing sequence.

[0025] In one embodiment, regarding step S14 above, the process of changing the number of gate driver outputs in each display block frame by frame starting from the second frame display time may specifically include the following driver processing: Starting from the second frame display time, adjust the number of gate driver outputs within each display block of each frame display time according to an arithmetic sequence; the arithmetic sequence is M-(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0026] Understandable. Figure 6 This provides another time-sharing driving scheme for embedded touch display panels. The first frame display time still follows the M-line gate driving for each display block. Then, starting from the second frame display time, the number of gate driving outputs for each display block is reduced by N (N=1, 2…). Then, starting from the third frame display time, the number of gate driving outputs for each display block is further reduced by N (N=1, 2…) lines based on MN, and so on, following an arithmetic sequence M-(k…). 1) The number of gate driver outputs in each display block is reduced frame by frame in the ×N method. In this way, the opening position of the first line of each display block is no longer fixed in a display cycle. This makes each line of gate driver output take turns as the first line in the display block frame by frame, thereby ensuring the consistency of the display in the display cycle and eliminating the horizontal stripe problem caused by the previous fixed opening position.

[0027] Figure 7 This is a timing diagram corresponding to another type of embedded touch display panel display touch time-sharing driving scheme. This timing diagram can be used to intuitively demonstrate the time-sharing driving method of this other display touch time-sharing driving scheme.

[0028] In one embodiment, such as Figure 8 As shown, an embedded touch display 100 is also provided. After the embedded touch display panel of the embedded touch display 100 is powered on, the gate driving circuit of the embedded touch display 100 enters the time-sharing driving of display and touch in the current cycle. In the current cycle, the gate driving circuit executes the driving of the first frame display time according to the M rows of gate driving in each display block; from the second frame display time onwards, the gate driving circuit changes the number of gate driving outputs in each display block frame by frame, so that each row of gates in the current cycle will become the first row of gates after the touch driving block ends. M is a positive integer.

[0029] The aforementioned embedded touch display 100, by applying the new time-sharing driving scheme for display touch, eliminates the problem of horizontal lines in fixed positions on the liquid crystal display panel without increasing the cost of the display panel, thereby improving the display effect.

[0030] In one embodiment, starting from the second frame display time, the Gate driver circuit adjusts the number of gate driver outputs within each display block in each frame display time according to an arithmetic sequence; the arithmetic sequence is M+(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0031] In one embodiment, starting from the second frame display time, the number of gate drive outputs within each display block in each frame display time is adjusted according to an arithmetic sequence; the arithmetic sequence is M-(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

[0032] It is understandable that the specific limitations of the embedded touch display 100 can be found in the corresponding limitations of the display touch time-sharing driving method of the embedded touch display panel mentioned above, and will not be repeated here.

[0033] It should be understood that, although Figure 1 The steps are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order in which these steps are executed; they can be performed in other orders. Figure 1 At least some of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and all such modifications and improvements fall within the scope of protection of the present invention.

Claims

1. A time-division driving method for display touch control of an embedded touch display panel, characterized in that, Including the following steps: After the embedded touch display panel is powered on, it enters the display and touch time-sharing drive of the current cycle; Within the current loop cycle, the first frame display time is driven by M lines of gate drivers for each display block; M is a positive integer; Starting from the second frame display time, the number of gate driver outputs in each display block is changed frame by frame, so that each row of gates in the current cycle will become the first row of gates after the touch driver block ends.

2. The display touch time-sharing driving method for an embedded touch display panel according to claim 1, characterized in that, The process of changing the number of gate driver outputs within each display block frame by frame, starting from the second frame display time, includes: Starting from the second frame display time, adjust the number of gate driver outputs within each display block of each frame display time according to an arithmetic sequence; the arithmetic sequence is M+(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

3. The display touch time-sharing driving method for an embedded touch display panel according to claim 1, characterized in that, The process of changing the number of gate driver outputs within each display block frame by frame, starting from the second frame display time, includes: Starting from the second frame display time, adjust the number of gate driver outputs within each display block of each frame display time according to an arithmetic sequence; the arithmetic sequence is M-(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

4. An embedded touch display, characterized in that, After the embedded touch display panel of the embedded touch display is powered on, the Gate drive circuit of the embedded touch display enters the display and touch time-sharing drive of the current cycle; Within the current cycle, the Gate driver circuit executes the drive for the first frame display time according to M lines of gate drive for each display block; M is a positive integer; Starting from the second frame display time, the Gate driver circuit changes the number of gate driver outputs in each display block frame by frame, so that each row of gates in the current cycle will become the first row of gates after the touch driver block ends.

5. The embedded touch display according to claim 4, characterized in that, Starting from the second frame display time, the Gate driver circuit adjusts the number of gate driver outputs in each display block in each frame display time according to an arithmetic sequence; The arithmetic sequence is M+(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

6. The embedded touch display according to claim 4, characterized in that, Starting from the second frame display time, adjust the number of gate drive outputs in each display block of each frame display time according to an arithmetic sequence; The arithmetic sequence is M-(k 1) × N, where k is a positive integer representing the number of frames, and N is a positive integer less than M.

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