A driving method of a display panel and a display device

Abstract

The application discloses a display panel driving method and a display device. The display panel driving method comprises the following steps: obtaining a display scene of a video source signal; when the display scene of the video source signal is a target display scene, sequentially and alternately charging first to i-th sub-pixels, and charging the sub-pixels of one color in each frame display period of the video source signal, thereby increasing the charging time of the sub-pixels, and relieving the problem of uneven display panel picture brightness caused by insufficient charging of the sub-pixels.

Description

Technical Field

[0001] This application relates to the field of display driver technology, and more specifically to a driving method and display device for a display panel. Background Technology

[0002] TRD (triple-rate-driving) technology refers to connecting three horizontally adjacent sub-pixels of different colors to a single data line and driving them sequentially by different scan lines. Therefore, the number of data lines and the number of data driver output channels can be reduced to one-third compared to the usual data lines and output channels. In other words, one source driver chip can do the work of three source driver chips, which greatly simplifies the manufacturing process and effectively reduces manufacturing costs.

[0003] However, this method reduces the number of driver chips, changing from one source driver chip to one data line to one source driver chip to multiple data lines. As a result, the time allocated to each data line becomes 1 / 3 of the original. This will lead to insufficient charging of the storage capacitor, insufficient deflection of the liquid crystal, and thus affect the pixel transmittance, resulting in uneven screen brightness. Summary of the Invention

[0004] This application provides a driving method and display device for a display panel, which can effectively increase the charging time of sub-pixels in the display panel, thereby alleviating the problem of uneven brightness of the display panel.

[0005] This application provides a driving method for a display panel. The display panel includes multiple pixels, each pixel including first to i-th sub-pixels of i different colors; the first to i-th sub-pixels of a pixel are connected to a common data line and respectively connected to first to i-th gate lines, where i is a positive integer greater than 1; the driving method for the display panel includes:

[0006] Display scenarios that acquire video source signals;

[0007] When the display scene of the video source signal is the target display scene, the first to the i-th sub-pixels are controlled to charge alternately in sequence, and a sub-pixel of one color is charged in each frame display cycle of the video source signal.

[0008] This application provides a driving method for a display panel. The display panel includes multiple pixels, each pixel including first to i-th sub-pixels of i different colors; the first to i-th sub-pixels of a pixel are connected to a common data line and respectively connected to first to i-th gate lines, where i is a positive integer greater than or equal to 1; the driving method for the display panel includes:

[0009] The frame rate and display scene of the video source signal are obtained, and the frame rate of the obtained video source signal is used as the initial frame rate.

[0010] When the display scene of the video source signal is the target display scene, the initial frame rate is reduced to the first frame rate, and the first to the i-th sub-pixels are charged alternately according to the first frame rate. In each frame display cycle of the video source signal, the sub-pixels of one color are charged so that the display panel displays the image corresponding to the video source signal.

[0011] When the smoothness of the image displayed on the control panel reaches the target smoothness according to the first frame rate, the first frame rate is stored as the target frame rate according to the external control command.

[0012] This application provides a display device, including a display panel and a driving module. The display panel includes pixels, and multiple pixels, each pixel including first to i-th sub-pixels of i different colors. The first to i-th sub-pixels in a pixel are connected to a data line and respectively connected to first to i-th gate lines. The driving module is connected to the data line and gate line of the display panel respectively. The driving module is used to control the first to i-th sub-pixels to charge alternately in sequence through the data line and gate line when the display scene of the video source signal is the target display scene, and to charge the sub-pixels of one color in each frame display cycle of the video source signal.

[0013] This application provides a driving method and display device for a display panel. The driving method acquires the display scene of a video source signal. When the display scene of the video source signal is the target display scene, it controls the first to the i-th sub-pixels to charge alternately in sequence. In each frame display cycle, only one color sub-pixel is charged. That is, in each frame display cycle, one data line is used to charge only one color sub-pixel. Compared with one data line charging three colors of sub-pixels in each frame display cycle, it can increase the charging time of sub-pixels, thereby effectively alleviating the problem of uneven brightness of the display panel caused by insufficient sub-pixel charging. Attached Figure Description

[0014] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0015] Figure 1 This is a structural diagram of a display panel provided in an embodiment of this application.

[0016] Figure 2 A flowchart illustrating the steps of the first embodiment of the display panel driving method provided in this application.

[0017] Figure 3 This is a schematic diagram of the charging of the display panel provided in each frame display cycle according to an embodiment of this application.

[0018] Figure 4 A flowchart of step 200 in the display panel driving method provided in the embodiments of this application.

[0019] Figure 5 A flowchart illustrating the steps of the second embodiment of the display panel driving method provided in this application.

[0020] Figure 6 This is a flowchart of step 300 in the display panel driving method provided in an embodiment of this application.

[0021] Figure 7 This is a flowchart of the steps in the third embodiment of the display driver driving method provided in this application.

[0022] Figure 8 This is a flowchart of the steps in the fourth embodiment of the display driver driving method provided in this application.

[0023] Figure 9 This is a flowchart of the steps in the fifth embodiment of the display driver driving method provided in this application.

[0024] Figure 10 This is a schematic diagram of the structure of the display device provided in the embodiments of this application. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Please see Figure 1 This embodiment provides a display panel, which includes multiple pixels, each pixel including first to i-th sub-pixels of i different colors; the first to i-th sub-pixels in a pixel are connected to a data line and respectively connected to first to i-th gate lines, where i is a positive integer greater than 1.

[0028] Specifically, taking i=3 as an example, the structure of this display panel is explained. Each pixel includes three different sub-pixels: a first sub-pixel, a second sub-pixel, and a third sub-pixel. For example, the first sub-pixel is a red sub-pixel R, the second sub-pixel is a green sub-pixel G, and the third sub-pixel is a blue sub-pixel B. The data lines and gate lines in the display panel are arranged to cross each other. The three colors of sub-pixels are arranged alternately in the vertical direction, and sub-pixels of the same color are arranged alternately in the horizontal direction.

[0029] exist Figure 1 In this structure, the R, G, and B sub-pixels in each vertically arranged pixel are connected to either data line D1 or D2, and then to three gate lines G1-G3 or G4-G6 respectively. Each row of sub-pixels shares a single gate line, thus being driven sequentially within each frame display cycle. Therefore, the display panel includes m data lines for driving 3m horizontally arranged sub-pixels and 3n gate lines for driving n vertically arranged sub-pixels, achieving a resolution of m×n pixels (where m and n are natural numbers). Compared to a conventional structure, the number of gate lines increases threefold, but the number of data lines is reduced to one-third. Therefore, one data line needs to charge three different color sub-pixels.

[0030] Based on the display panel described above, please refer to Figure 2 This application provides a driving method for a display panel, the driving method including:

[0031] 100. Display scenarios for acquiring video source signals;

[0032] 200. When the display scene of the video source signal is the target display scene, the first to the i-th sub-pixels are controlled to charge alternately in sequence, and the sub-pixels of one color are charged in each frame display cycle of the video source signal.

[0033] Here, the display scenario of the video source signal refers to the refresh rate requirement of the video source signal's display, while the target display scenario refers to a lower refresh rate requirement for the video source signal's display, such as a static image or a smooth dynamic image. In this application, by obtaining the display scenario of the video source signal, when the refresh rate requirement of the video source signal's display is low, the first to the i-th sub-pixels are controlled to charge alternately, and only one color sub-pixel is charged within each frame display cycle. For example, as... Figure 3As shown, in frame 3n+1, only the red sub-pixel is charged; in frame 3n+2, only the green sub-pixel is charged; and in frame 3n+3, only the blue sub-pixel is charged. This means that in each frame's display cycle, one data line is used to charge only one color sub-pixel. Compared to using one data line to charge three colors of sub-pixels in each frame's display cycle, this increases the sub-pixel charging time, thus effectively alleviating the problem of uneven brightness on the display panel caused by insufficient sub-pixel charging.

[0034] Please see Figure 4 In some embodiments, step 200 specifically includes:

[0035] 210. Obtain the frame rate of the video source signal and reduce the frame rate of the video source signal to the target frame rate;

[0036] 220. Control the charging of the first to the i-th sub-pixels in turn according to the target frame rate, and charge the sub-pixels of one color in each frame display period of the video source signal.

[0037] In this application, the frame rate of the video source signal is the actual frame rate, and in this embodiment, the actual frame rate of the video source signal is used as the initial frame rate. The frame rate in this application is matched with the refresh rate of the display panel; that is, when the frame rate is high, the corresponding refresh rate is also high; when the frame rate is low, the corresponding refresh rate of the display panel is also high. If the display of the video source signal has a low refresh rate requirement, the initial frame rate can be appropriately reduced to the target frame rate, thereby increasing the scanning time of each frame and the charging time of each row of sub-pixels.

[0038] Please see Figure 5 In some embodiments, the driving method for the display panel further includes: 300, when the display scene of the video source signal is a non-target display scene, controlling the first to the i-th sub-pixels to alternately charge sequentially within one frame display period of the video source signal. Specifically, when the display scene of the video source signal is a non-target display scene, that is, when the display of the video source signal requires a high refresh rate, multiple sub-pixels are controlled to alternately charge sequentially within one frame display period of the video source signal in order to complete the display of the video source signal.

[0039] Please see Figure 6 As one embodiment, step 300 specifically includes:

[0040] 310. Obtain the frame rate of the video source signal and use the frame rate of the video source signal as the initial frame rate;

[0041] 320. Based on the initial frame rate, control the first to the i-th sub-pixels to charge alternately within one frame display period of the video source signal.

[0042] In this embodiment, when the display of the video source signal requires a high refresh rate, the frame rate of the video source is directly obtained, and the first to the i-th sub-pixels are controlled to alternately charge within one frame display cycle of the video source signal according to the initial frame rate of the video source, so as to realize the display of the video source signal.

[0043] As one embodiment, the initial frame rate in this application can be i times the target frame rate. If each pixel includes three sub-pixels of different colors, i.e., i = 3, the initial frame rate can be i times the target frame rate, which is equivalent to the target frame rate being 1 / 3 of the initial frame rate. Therefore, when only one color sub-pixel is charged within a single display frame, it is equivalent to using the charging time for the other two colors to charge only one color sub-pixel within that display frame. For the entire row of sub-pixels, the time a gate line spends charging that row of sub-pixels becomes three times longer, and the frame rate will decrease to 1 / 3 of the initial frame rate. Conversely, if all sub-pixels of one color are charged within a single display frame, the frame rate of the video source signal needs to be reduced to 1 / 3 of the initial frame rate to obtain the target frame rate.

[0044] Please see Figure 7 This application also provides a method for driving a display panel, the method comprising:

[0045] 101. Obtain the frame rate and display scene of the video source signal, and use the obtained frame rate of the video source signal as the initial frame rate;

[0046] 102. When the display scene of the video source signal is the target display scene, the initial frame rate is reduced to the first frame rate, and the first to the i-th sub-pixels are charged alternately according to the first frame rate. In each frame display cycle of the video source signal, the sub-pixels of one color are charged so that the display panel displays the image corresponding to the video source signal.

[0047] 103. When the smoothness of the image displayed on the control panel reaches the target smoothness according to the first frame rate, the first frame rate is stored as the target frame rate according to the external control command.

[0048] In this embodiment, during the testing phase of the display panel, the frame rate and display scene of the video source signal to be tested are acquired. If the refresh rate required for the display of the video source signal is low, the frame rate of the video source signal is reduced to a first frame rate. Based on this first frame rate, the first to the i-th sub-pixels are charged alternately, and within each frame display cycle of the video source signal, a sub-pixel of one color is charged, so that the display panel displays the image corresponding to the video source signal. Then, it is observed whether the smoothness of the image displayed by the display panel controlled by the first frame rate reaches the target smoothness. Here, the target smoothness is the smoothness of the image without affecting human visual perception; that is, the image is perceived as smooth by the human eye, and the smoothness reaches the target smoothness. If the image displayed by the display panel controlled by the first frame rate reaches the target smoothness, an external control command is acquired. Based on this external control command, the first frame rate is stored as the target frame rate for subsequent direct use to control the display panel's display.

[0049] Please see Figure 8 In some embodiments, the driving method for the display panel further includes:

[0050] 104. When the smoothness of the image displayed on the display panel does not reach the target smoothness according to the first frame rate, the initial frame rate is reduced to the second frame rate, and the first to the i-th sub-pixels are charged alternately according to the second frame rate. In each frame display cycle of the video source signal, the sub-pixels of one color are charged so that the display panel displays the image corresponding to the video source signal. The second frame rate is different from the first frame rate.

[0051] 105. When the smoothness of the image displayed on the control panel reaches the target smoothness according to the second frame rate, the second frame rate is stored as the target frame rate according to the external control command.

[0052] In this embodiment, if the smoothness of the display panel controlled by the first frame rate does not reach the target smoothness, the initial frame rate is reduced to a second frame rate, which is different from the first frame rate. If the display effect is poor when the initial frame rate is reduced to the first frame rate, the initial frame rate is adjusted back to the second frame rate. If the image displayed on the display panel reaches the target smoothness when controlled by the second frame rate, an external control command is obtained, and the second frame rate is stored as the target frame rate according to the external control command, so that the display panel can be directly called to control the display panel in the future. Otherwise, the initial frame rate is adjusted again for display testing in order to obtain more target frame rates for storage.

[0053] Please see Figure 9 In some embodiments, the driving method for the display panel further includes:

[0054] 106. Obtain the number of stored target frame rates;

[0055] 107. When the number of target frame rates is less than the preset number, the frame rate of the video source signal and the display scene are acquired again, and the frame rate of the acquired video source signal is used as the initial frame rate.

[0056] 108. When the display scene of the video source signal is the target display scene, the initial frame rate is reduced to the first frame rate, and the first to the i-th sub-pixels are charged alternately according to the first frame rate. In each frame display cycle of the video source signal, the sub-pixels of one color are charged so that the display panel displays the image corresponding to the video source signal.

[0057] 109. When the smoothness of the image displayed on the control panel reaches the target smoothness according to the first frame rate, the first frame rate is stored as the target frame rate according to the external control command.

[0058] This application also acquires the number of stored target frame rates. When the number of stored target frame rates reaches a preset number, the test stops. If the target frame rate is less than the preset number, the video source signal is increased, the frame rate and display scene of the video source signal are acquired, and a display test is performed. When the display scene of the video source signal is the target display scene, the initial frame rate is reduced to the first frame rate, and the first to the i-th sub-pixels are charged alternately according to the first frame rate. In each frame display cycle of the video source signal, the sub-pixels of one color are charged so that the display panel displays the image corresponding to the video source signal. When the smoothness of the image displayed on the display panel reaches the target smoothness according to the first frame rate, the first frame rate is stored as the target frame rate according to the external control command. In other words, when the target frame rate is less than the preset number, steps 101 to 105 are repeated to acquire more target frame rates.

[0059] The display panel driving method in this embodiment is applied during the display panel testing phase. During testing, the smoothness of the display panel's image is observed at a first frame rate or a second frame rate by adjusting the frame rate of the video source signal. Based on the smoothness of the image, it is determined whether to save the first or second frame rate as a target frame rate, thereby obtaining multiple target frame rates for pre-storage. Furthermore, if the number of target frame rates is insufficient, the video source signal is increased to continue testing, ensuring that a sufficient number of target frame rates are pre-stored.

[0060] Please see Figure 10 This application embodiment also provides a display device, which includes a driving module 10 and the aforementioned display panel 20; since the structure of the display panel 20 has been described in detail above, it will not be repeated here.

[0061] The driving module 10 in this application is connected to the data line and gate line of the display panel 20 respectively. The driving module 10 is used to control the first to the i-th sub-pixels to charge alternately in sequence through the data line and gate line when the display scene of the video source signal is the target display scene. It charges the sub-pixels of one color in each frame display cycle of the video source signal, thereby increasing the charging time of the sub-pixels and effectively alleviating the problem of uneven brightness of the display panel 20 caused by insufficient charging of the sub-pixels.

[0062] In some embodiments, the driving module 10 includes a controller 111, a gate driving unit 112, and a source driving unit 113. The gate driving unit 112 is connected to multiple gate lines and the controller 111, and the source driving unit 113 is connected to multiple data lines and the controller 111. The controller 111 is used to acquire the display scene of the video source signal. When the display scene of the video source signal is the target display scene, it reduces the frame rate of the video source signal to the target frame rate and outputs a first gate control signal, a first source control signal, and a data signal corresponding to the video source signal according to the target frame rate. The gate driving unit 112 is used to control the first to the i-th sub-pixels to be alternately turned on sequentially through the first to the i-th gate lines according to the first gate control signal, and only turns on a sub-pixel of one color in each frame display cycle. The source driving unit 113 is used to charge the corresponding sub-pixel according to the data voltage corresponding to the source control signal and the data signal when any sub-pixel among the first to the i-th sub-pixels is turned on.

[0063] In some embodiments, the controller 111 is further configured to, when the display scene of the video source signal is a non-target display scene, use the frame rate of the video source signal as the initial frame rate, and output the second gate control signal, the second source control signal, and the data signal corresponding to the video source signal according to the initial frame rate; the gate driving unit 112 is further configured to, according to the first gate control signal, control the first to the i-th sub-pixels to be alternately turned on in sequence within one frame display period of the video source signal through the first to the i-th gate lines respectively; the source driving unit 113 is further configured to, when any sub-pixel among the first to the i-th sub-pixels is turned on, charge the corresponding sub-pixel with the data voltage corresponding to the data signal according to the second source control signal.

[0064] The driving module 10 in this application acquires the display scene of the video source signal. When the display of the video source signal has a low refresh rate requirement, it controls the first to the i-th sub-pixels to charge alternately in sequence, and charges only one color sub-pixel in each frame display cycle. Compared with charging multiple colors of sub-pixels in each frame display cycle with one data line, it can increase the charging time of sub-pixels, thereby effectively alleviating the problem of uneven brightness of the display panel 20 caused by insufficient charging of sub-pixels.

[0065] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0066] The driving method for the display panel provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A driving method for a display panel, characterized in that, The display panel includes a plurality of pixels, and each pixel includes first to i-th sub-pixels of i different colors; Each vertically arranged pixel has its first to i-th sub-pixels connected to a single data line and to the first to i-th gate lines respectively. Each row of sub-pixels shares a single gate line. Sub-pixels of different colors are arranged alternately in the vertical direction, and sub-pixels of the same color are arranged alternately in the horizontal direction, where i is a positive integer greater than 1. The driving method for the display panel includes: The display scene that acquires the video source signal; When the display scene of the video source signal is the target display scene, the frame rate of the video source signal is obtained and the frame rate of the video source signal is reduced to the target frame rate; according to the target frame rate, the first to the i-th sub-pixels are charged alternately in sequence, and a sub-pixel of one color is charged in each frame display cycle of the video source signal; When the display scene of the video source signal is a non-target display scene, the frame rate of the video source signal is obtained and the frame rate of the video source signal is used as the initial frame rate; according to the initial frame rate, the first to the i-th sub-pixels are controlled to charge alternately in one frame display period of the video source signal; wherein, the initial frame rate is i times the target frame rate.

2. A driving method for a display panel, characterized in that, The display panel includes a plurality of pixels, and each pixel includes first to i-th sub-pixels of i different colors; Each vertically arranged pixel has its first to i-th sub-pixels connected to a single data line and to the first to i-th gate lines respectively. Each row of sub-pixels shares a single gate line. Sub-pixels of different colors are arranged alternately in the vertical direction, and sub-pixels of the same color are arranged alternately in the horizontal direction, where i is a positive integer greater than 1. The driving method for the display panel includes: The frame rate and display scene of the video source signal are obtained, and the obtained frame rate of the video source signal is used as the initial frame rate. When the display scene of the video source signal is the target display scene, the initial frame rate is reduced to the first frame rate, and the first to the i-th sub-pixels are charged alternately according to the first frame rate. In each frame display cycle of the video source signal, the sub-pixels of one color are charged so that the display panel displays the image corresponding to the video source signal. When the smoothness of the image displayed on the display panel reaches the target smoothness according to the first frame rate, the first frame rate is stored as the target frame rate according to the external control command; when the smoothness of the image displayed on the display panel does not reach the target smoothness according to the first frame rate, the initial frame rate is reduced to the second frame rate, and the first to the i-th sub-pixels are charged alternately according to the second frame rate, and a sub-pixel of one color is charged in each frame display cycle of the video source signal so that the display panel displays the image corresponding to the video source signal, wherein the second frame rate is different from the first frame rate; When the smoothness of the image displayed on the display panel reaches the target smoothness according to the second frame rate, the second frame rate is stored as the target frame rate according to the external control command; when the smoothness of the image displayed on the display panel does not reach the target smoothness according to the second frame rate, the initial frame rate is adjusted again.

3. The driving method for the display panel according to claim 2, characterized in that, The driving method for the display panel further includes: Obtain the number of stored target frame rates; When the number of target frame rates is less than the preset number, the frame rate of the video source signal and the display scene are acquired, and the acquired frame rate of the video source signal is used as the initial frame rate. When the display scene of the video source signal is the target display scene, the initial frame rate is reduced to the first frame rate, and the first to the i-th sub-pixels are charged alternately according to the first frame rate. In each frame display cycle of the video source signal, the sub-pixels of one color are charged so that the display panel displays the image corresponding to the video source signal. When the smoothness of the image displayed on the display panel reaches the target smoothness according to the first frame rate, the first frame rate is stored as the target frame rate according to the external control command.

4. A display device, characterized in that, include: The display panel includes a plurality of pixels, each pixel including first to i-th sub-pixels of i different colors; The first to i-th sub-pixels in each vertically arranged pixel are connected to a data line and to the first to i-th gate lines respectively. Each row of sub-pixels shares a gate line. Sub-pixels of different colors are arranged alternately in the vertical direction, and sub-pixels of the same color are arranged alternately in the horizontal direction, where i is a positive integer greater than 1. The driver module includes: The controller is configured to acquire the display scene of the video source signal. When the display scene of the video source signal is a target display scene, the controller reduces the frame rate of the video source signal to the target frame rate and outputs a first gate control signal, a first source control signal, and a data signal corresponding to the video source signal according to the target frame rate. When the display scene of the video source signal is not a target display scene, the controller uses the frame rate of the video source signal as an initial frame rate and outputs a second gate control signal, a second source control signal, and a data signal corresponding to the video source signal according to the initial frame rate. A gate driving unit is connected to multiple gate lines and the controller. The gate driving unit is configured to control the first to the i-th sub-pixels to be alternately turned on sequentially through the first to the i-th gate lines according to the first gate control signal, and to turn on only one color sub-pixel in each frame display period. It is also configured to control the first to the i-th sub-pixels to be alternately turned on sequentially through the first to the i-th gate lines according to the second gate control signal in one frame display period of the video source signal. A source driving unit is connected to multiple data lines and the controller. The source driving unit is used to charge the corresponding sub-pixel according to the data voltage corresponding to the first source control signal and the data signal when any sub-pixel from the first to the i-th sub-pixel is turned on; it is also used to charge the corresponding sub-pixel according to the data voltage corresponding to the second source control signal and the data signal when any sub-pixel from the first to the i-th sub-pixel is turned on.

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