Display device
By setting the first and second preset gray levels in the driving module, the problem of false detection when the gray level jumps in the LCD panel is solved, more accurate driving mode switching is achieved, screen flickering is reduced, and display stability is improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
- Filing Date
- 2022-12-29
- Publication Date
- 2026-05-26
AI Technical Summary
In the prior art, LCD panels are prone to false detection under abnormal or grayscale fluctuations, leading to abnormal phenomena such as screen flickering.
In the driver module, first and second preset gray levels are set. When the gray level to be displayed changes near the preset gray level, the driver mode is not switched. Instead, a specific driver mode is used to drive the display panel to avoid false detection and repeated mode switching.
It effectively avoids false detection and frequent mode switching caused by grayscale transitions, reduces display problems such as screen flickering, and improves the detection accuracy of the driver module.
Smart Images
Figure CN115909931B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and more specifically to a display device. Background Technology
[0002] With technological advancements, LCD panels have become widely used in various fields due to their superior characteristics such as slimness, low power consumption, and no radiation. However, LCD panels can exhibit display problems such as flickering and wavering under certain special display conditions. To mitigate these issues, detection functions are typically added to the driver module. When these special display conditions are detected, different driving modes can be applied accordingly. However, current detection functions can only detect some "ideal" special display conditions. For abnormal or grayscale-fluctuating display conditions, false detections are prone to occur, leading to screen flickering and other abnormal phenomena. Summary of the Invention
[0003] This application provides a display device to solve the technical problem in the prior art that false detection is easy to occur when displaying abnormal or grayscale jumping screens, resulting in screen flickering and other issues.
[0004] This application provides a display device, including:
[0005] Display panel; and
[0006] A driving module is connected to the display panel. The driving module is used to drive the display panel in a first driving mode when it detects that the gray level to be displayed on the display panel is less than or equal to a first preset gray level.
[0007] In the first driving mode, when the driving module detects that the gray level to be displayed is greater than or equal to the second preset gray level, the first driving mode is switched to the second driving mode, where the second preset gray level is greater than the first preset gray level.
[0008] Optionally, in some embodiments of this application, the gray level difference between the second preset gray level and the first preset gray level is greater than or equal to 2.
[0009] Optionally, in some embodiments of this application, if the grayscale to be displayed alternately jumps to a first grayscale and a second grayscale, and the first grayscale is greater than the second preset grayscale and the second grayscale is less than the second preset grayscale, then the first preset grayscale is less than the second grayscale.
[0010] Optionally, in some embodiments of this application, when the driving module detects that the gray level to be displayed is less than or equal to the first preset gray level and the gray level to be displayed is greater than or equal to the third preset gray level, the first driving mode is converted to the second driving mode.
[0011] In the first driving mode, when the driving module detects that the gray level to be displayed is greater than the second preset gray level, or the gray level to be displayed is less than the fourth preset gray level, the first driving mode is switched to the second driving mode; the fourth preset gray level is less than the third preset gray level.
[0012] Optionally, in some embodiments of this application, the gray level difference between the third preset gray level and the fourth preset gray level is greater than or equal to 2.
[0013] Optionally, in some embodiments of this application, if the grayscale to be displayed alternately jumps to a third grayscale and a fourth grayscale, and the third grayscale is less than the fourth preset grayscale and the fourth grayscale is greater than the fourth preset grayscale, then the third preset grayscale is greater than the fourth grayscale.
[0014] Optionally, in some embodiments of this application, the first driving mode and the second driving mode are selected from one of frame flipping, column flipping, row flipping, two-row flipping, two-column flipping and point flipping, and the first driving mode and the second driving mode are different.
[0015] Optionally, in some embodiments of this application, the driving module is used to detect the grayscale to be displayed in the image to be displayed on the display panel, wherein the image to be displayed is a static image displaying a single grayscale.
[0016] Optionally, in some embodiments of this application, the driving module includes a timing controller for detecting the grayscale to be displayed.
[0017] Optionally, in some embodiments of this application, the driving module further includes a system chip connected to the timing controller, the system chip being used to send the grayscale to be displayed to the timing controller.
[0018] This application provides a display device, which includes a display panel and a driving module. The driving module is connected to the display panel and is used to drive the display panel in a first driving mode when it detects that the grayscale to be displayed on the display panel is less than or equal to a first preset grayscale. In the first driving mode, when the driving module detects that the grayscale to be displayed is greater than a second preset grayscale, it switches the first driving mode to a second driving mode, where the second preset grayscale is greater than the first preset grayscale. This application sets a second preset grayscale that is different from the first preset grayscale. When the grayscale to be displayed changes near the first preset grayscale but does not exceed the second preset grayscale, the driving module will not switch from the first driving mode to the second driving mode; similarly, when the grayscale to be displayed changes near the second preset grayscale but does not exceed the first preset grayscale, the driving module will not switch from the second driving mode to the first driving mode. Therefore, the embodiments of this application can avoid false detections caused by the grayscale to change near the first or second preset grayscale, and avoid display problems such as screen flickering caused by repeated switching between the first and second driving modes. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a first structural schematic diagram of the display device provided in this application;
[0021] Figure 2 This is a first schematic diagram of the grayscale to be displayed provided in this application;
[0022] Figure 3 This is a schematic diagram of the first conversion of the driving mode provided in this application;
[0023] Figure 4 This is a second schematic diagram of the grayscale to be displayed provided in this application;
[0024] Figure 5 This is a second conversion diagram of the driving mode provided in this application;
[0025] Figure 6 This is a second structural schematic diagram of the display device provided in this application. Detailed Implementation
[0026] 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 some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0027] In the description of this application, it should be understood that 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. Therefore, features defined with "first" and "second," etc., may explicitly or implicitly include one or more of the stated features, and thus should not be construed as limiting this application. Furthermore, the term "multiple" refers to two or more.
[0028] This application provides a display device, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application.
[0029] Please see Figure 1 , Figure 1 This is a first structural schematic diagram of the display device provided in this application. In this embodiment, the display device 100 includes a display panel 10 and a driving module 20. The driving module 20 is connected to the display panel 10. The driving module 20 is used to drive the display panel 10 to perform display.
[0030] In some embodiments of this application, in order to adopt a corresponding driving mode for a special display screen, a detection function is usually added to the driving module 20 to detect whether the screen to be displayed is a special display screen. For details, please refer to Figures 1-3 , Figure 2 This is a first schematic diagram of the grayscale to be displayed provided in this application; Figure 3 This is a schematic diagram of the first conversion of the driving mode provided in this application.
[0031] like Figure 2 and Figure 3 As shown, assume that the driving module 20 includes a first driving mode and a second driving mode. Initially, the driving module 20 drives the display panel 10 using the second driving mode. When the driving module 20 detects that the grayscale to be displayed on the display panel 10 is less than or equal to the first preset grayscale N and greater than or equal to the third preset grayscale M, it determines that the image to be displayed on the display panel 10 is a special display image, and then the driving module 20 switches from the second driving mode to the first driving mode.
[0032] Specifically, if the grayscale to be displayed is less than the third preset grayscale M or greater than the first preset grayscale N, then the first driving mode is turned off and the second driving mode is turned on. If the grayscale to be displayed is greater than or equal to the third preset grayscale M and less than or equal to the first preset grayscale N, then the second driving mode is turned off and the first driving mode is turned on.
[0033] It is understandable that, due to signal interference or abnormal signal transmission, when the grayscale to be displayed changes near the first preset grayscale N or the third preset grayscale M, the driving module 20 may repeatedly switch between the first driving mode and the second driving mode, resulting in screen flickering.
[0034] For example, if the first preset grayscale N is set to 20L and the third preset grayscale M is set to 10L, and the grayscale to be displayed alternates between 18L and 21L, then when the grayscale to be displayed is 18L, the driving module 20 drives the display panel 10 using the first driving mode. When the grayscale to be displayed jumps to 21L, the driving module 20 switches from the first driving mode to the second driving mode. When the grayscale to be displayed jumps back to 18L, the driving module 20 switches from the second driving mode back to the first driving mode. That is, the driving module 20 repeatedly switches between the first driving mode and the second driving mode. The third preset grayscale M is similar, and will not be illustrated further here.
[0035] To address the aforementioned issues, this application embodiment incorporates a novel detection mechanism into the driver module 20. For details, please refer to... Figure 1 , Figure 4 as well as Figure 5 , Figure 4 This is a second schematic diagram of the grayscale to be displayed provided in this application; Figure 5 This is a schematic diagram of the second conversion of the driving mode provided in this application.
[0036] In this embodiment, the driving module 20 is connected to the display panel 10. The driving module 20 is used to drive the display panel 10 in a first driving mode when it detects that the grayscale to be displayed on the display panel 10 is less than or equal to a first preset grayscale N. Specifically, in the first driving mode, when the driving module 20 detects that the grayscale to be displayed is greater than a second preset grayscale B, it switches from the first driving mode to the second driving mode. The second preset grayscale B is greater than the first preset grayscale N.
[0037] It is understood that in the first driving mode, even if the grayscale to be displayed jumps to any grayscale between the first preset grayscale N and the second preset grayscale B, the driving module 20 will not switch the first driving mode to the second driving mode. That is, in this embodiment, the range of grayscale to be displayed in the special display screen is less than or equal to the second preset grayscale B.
[0038] This embodiment of the application sets a second preset grayscale B, which is different from the first preset grayscale N. When the grayscale to be displayed changes abruptly near the first preset grayscale N but not greater than the second preset grayscale B, the driving module 20 will not switch from the first driving mode to the second driving mode; similarly, when the grayscale to be displayed changes abruptly near the second preset grayscale B but not less than or equal to the first preset grayscale N, the driving module 20 will not switch from the second driving mode to the first driving mode. Therefore, this embodiment of the application can avoid false detection caused by the grayscale to change abruptly near the first preset grayscale N or the second preset grayscale B, thereby avoiding display problems such as screen flickering caused by repeated switching between the first driving mode and the second driving mode.
[0039] In some embodiments of this application, the first driving mode and the second driving mode may be selected from one of frame flipping, column flipping, row flipping, two-row flipping, two-column flipping, and point flipping, respectively. The first driving mode and the second driving mode are not the same.
[0040] Here, "flipping" refers to the polarity reversal of the data voltage corresponding to the grayscale level to be displayed. It can be understood that the positive and negative data voltages of the same grayscale level are symmetrical about a common voltage. The voltage value of the positive data voltage is greater than the common voltage, and the voltage value of the negative data voltage is less than the common voltage.
[0041] For example, when the first driving mode is two-row flip, the second driving mode is frame flip. Or, when the first driving mode is dot flip, the second driving mode is column flip. The first and second driving modes can be set according to the specific display requirements. For instance, for some high-power displays, using frame flip can reduce the complexity of data voltage changes and reduce power consumption; this will not be elaborated upon here.
[0042] In some embodiments of this application, the driving module 20 is used to detect the grayscale to be displayed in the display panel 10. The display screen is a static image displaying a single grayscale.
[0043] In this context, displaying a static image with a single grayscale means that at least a portion of the sub-pixels in the display panel 10 correspond to grayscale levels such as 10L, 18L, and 20L, which remain unchanged across different frames. Thus, the driving module 20 can detect each grayscale level to be displayed and determine whether a jump occurs between adjacent frames.
[0044] The screen to be displayed can be a whole frame or a part of a whole frame; this application does not make any specific limitation on this.
[0045] In some embodiments of this application, the grayscale difference between the second preset grayscale B and the first preset grayscale N is greater than or equal to 2. For example, the grayscale difference between the second preset grayscale B and the first preset grayscale N can be 2, 3, 4, 6, 10, etc.
[0046] Understandably, when the grayscale to be displayed changes abruptly near the first preset grayscale N or the second preset grayscale B, the minimum grayscale change amplitude can be 1. For example, if the first preset grayscale N is 19L, and the grayscale to be displayed changes between 19L and 20L, then the second preset grayscale B needs to be set to greater than or equal to 21L. Thus, when the grayscale to be displayed is 19L, the drive module 20 uses the first drive mode. Even if the grayscale to be displayed changes to 20L, the drive module 20 will not switch from the first drive mode to the second drive mode, thus avoiding repeated switching between the first and second drive modes.
[0047] In some embodiments of this application, if the gray level to be displayed jumps between the first gray level P and the second gray level Q, and the first gray level P is greater than the second preset gray level B, and the second gray level Q is less than the second preset gray level B, then the first preset gray level N is less than the second gray level Q.
[0048] For example, let's set the first preset grayscale N to 16L, the second preset grayscale B to 20L, the second grayscale Q to 18L, and the first grayscale P to 21L. Then, when the grayscale to be displayed is 16L, the condition that the grayscale to be displayed is less than or equal to the first preset grayscale N is met, and the driving module 20 drives the display panel 10 using the first driving mode. When the grayscale to be displayed is 18L, the condition that the grayscale to be displayed is greater than the second preset grayscale B is not met, and the driving module 20 still drives the display panel 10 using the first driving mode. When the grayscale to be displayed jumps to 21L, the condition that the grayscale to be displayed is greater than the second preset grayscale B is met, and the driving module 20 switches from the first driving mode to the second driving mode. When the grayscale to be displayed jumps back to 18L, the condition that the grayscale to be displayed is less than or equal to the first preset grayscale N is not met, and the driving module 20 still drives the display panel 10 using the second driving mode. Therefore, even if the grayscale to be displayed jumps between the first grayscale P and the second grayscale Q, the driving module 20 always drives the display panel 10 in the second driving mode, without needing to repeatedly switch between the first driving mode and the second driving mode.
[0049] That is, in this embodiment of the application, the driving module 20 can set the gray level size of the first preset gray level N and the second preset gray level B according to the actual jump of the gray level to be displayed, so as to further improve the detection accuracy of the driving module 20.
[0050] In some embodiments of this application, when the driving module 20 detects that the gray level to be displayed is less than or equal to a first preset gray level N, and the gray level to be displayed is greater than or equal to a third preset gray level M, the first driving mode is switched to a second driving mode. Specifically, in the first driving mode, when the driving module 20 detects that the gray level to be displayed is greater than a second preset gray level B, or the gray level to be displayed is less than a fourth preset gray level A, the first driving mode is switched to the second driving mode; the fourth preset gray level A is less than the third preset gray level M.
[0051] In the first driving mode, even if the grayscale to be displayed jumps to any grayscale between the first preset grayscale N and the second preset grayscale B, or even if the grayscale to be displayed jumps to any grayscale between the third preset grayscale M and the fourth preset grayscale A, the driving module 20 will not switch from the first driving mode to the second driving mode. That is, in this embodiment, the range of grayscale to be displayed in the special display screen is less than or equal to the second preset grayscale B and greater than or equal to the fourth preset grayscale A.
[0052] Similarly, when the grayscale to be displayed jumps near the first preset grayscale N, but is not greater than the second preset grayscale B, the driving module 20 will not switch from the first driving mode to the second driving mode; when the grayscale to be displayed jumps near the second preset grayscale B, but is not less than or equal to the first preset grayscale N, the driving module 20 will not switch from the second driving mode to the first driving mode. Therefore, the embodiments of this application can avoid false detection caused by the grayscale to jump near the first preset grayscale N or the second preset grayscale B, and avoid display problems such as screen flickering caused by repeated switching between the first driving mode and the second driving mode.
[0053] Meanwhile, when the grayscale to be displayed changes abruptly near the third preset grayscale M, but is not lower than the fourth preset grayscale A, the driving module 20 will not switch from the first driving mode to the second driving mode; similarly, when the grayscale to be displayed changes abruptly near the fourth preset grayscale A, but is not greater than or equal to the third preset grayscale M, the driving module 20 will not switch from the second driving mode to the first driving mode. Therefore, the embodiments of this application can avoid false detection caused by the grayscale to change abruptly near the third preset grayscale M or the fourth preset grayscale A, and avoid display problems such as screen flickering caused by repeated switching between the first driving mode and the second driving mode.
[0054] Optionally, in some embodiments of this application, the gray level difference between the third preset gray level M and the fourth preset gray level A is greater than 2. For example, the gray level difference between the third preset gray level M and the fourth preset gray level A can be 2, 3, 4, 6, 10, etc.
[0055] In some embodiments of this application, if the gray levels to be displayed alternately jump to the third gray level E and the fourth gray level F, and the third gray level E is less than the fourth preset gray level A, and the fourth gray level F is greater than the fourth preset gray level A, then the third preset gray level M is greater than the fourth gray level F.
[0056] For example, let's set the third preset grayscale M to 12L, the fourth preset grayscale A to 10L, the first preset grayscale N to 16L, and the second preset grayscale B to 20L. Let the third grayscale E be 9L and the fourth grayscale F to 11L. Then, when the grayscale to be displayed is 12L, it satisfies the condition that the grayscale to be displayed is greater than or equal to the third preset grayscale M and less than or equal to the first preset grayscale N, and the driving module 20 drives the display panel 10 using the first driving mode. When the grayscale to be displayed is 11L, it does not satisfy the condition that the grayscale to be displayed is less than the fourth preset grayscale A, and the driving module 20 still drives the display panel 10 using the first driving mode. When the grayscale to be displayed jumps to 9L, it satisfies the condition that the grayscale to be displayed is less than the fourth preset grayscale A, and the driving module 20 switches from the first driving mode to the second driving mode. When the grayscale to be displayed jumps back to 11L, it does not satisfy the condition that the grayscale to be displayed is greater than or equal to the third preset grayscale M and less than or equal to the first preset grayscale N, and the driving module 20 still drives the display panel 10 using the second driving mode. Therefore, even if the grayscale to be displayed repeatedly jumps to the third grayscale E and the fourth grayscale F, the driving module 20 always drives the display panel 10 in the second driving mode, without needing to repeatedly switch between the first driving mode and the second driving mode.
[0057] That is, in this embodiment of the application, the driving module 20 can set the grayscale values of the third preset grayscale M and the fourth preset grayscale A according to the actual transition of the grayscale to be displayed, thereby further improving the detection accuracy of the driving module 20.
[0058] Please see Figure 6 , Figure 6 This is a second structural schematic diagram of the display device provided in this application. Figure 1 The difference in the display device 100 shown is that, in this embodiment, the driving module 20 includes a timing controller 21. The timing controller 21 is used to detect the grayscale to be displayed.
[0059] Furthermore, the driver module 20 also includes a system-on-chip (SOC) 22. The SOC 22 is connected to the timing controller 21. The SOC 22 is used to send the grayscale to be displayed to the timing controller 21.
[0060] When the grayscale output by the system chip 22 fluctuates, the timing controller 21, after receiving the grayscale, can use the detection method described in the above embodiment to detect the grayscale, thus avoiding detection errors caused by the fluctuation of the grayscale output by the system chip 22.
[0061] Furthermore, the driving module 20 also includes a driving chip 23. The driving chip 23 is connected to the timing controller 21 and the display panel 10 to receive the grayscale to be displayed processed by the timing controller 21. The driving chip 23 is used to process the received grayscale to be displayed and output the data voltage corresponding to the grayscale to be displayed to the display panel 10.
[0062] In this embodiment, the polarity of the data voltage corresponding to the grayscale to be displayed can be changed by the driver chip 23, thereby realizing more driving modes with polarity reversal of data voltage.
[0063] The display device 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 method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A display device, characterized by comprising: include: Display panel; as well as A driving module is connected to the display panel. The driving module is used to drive the display panel in a first driving mode when it detects that the gray level to be displayed on the display panel is less than or equal to a first preset gray level. In the first driving mode, when the driving module detects that the gray level to be displayed is greater than the second preset gray level, it switches the first driving mode to the second driving mode. The second preset gray level is greater than the first preset gray level, so that when the gray level to be displayed jumps to any gray level between the first preset gray level and the second preset gray level in the first driving mode, the driving module will not switch the first driving mode to the second driving mode. If the grayscale to be displayed alternately jumps to the first grayscale and the second grayscale, and the first grayscale is greater than the second preset grayscale and the second grayscale is less than the second preset grayscale, then the first preset grayscale is less than the second grayscale. The driving module is used to detect the grayscale to be displayed in the display panel, wherein the display panel is a static image displaying a single grayscale, and the grayscale to be displayed remains unchanged in different frames.
2. The display device according to claim 1, characterized in that, The gray level difference between the second preset gray level and the first preset gray level is greater than or equal to 2.
3. The display device according to claim 1, characterized in that, When the driving module detects that the gray level to be displayed is less than or equal to the first preset gray level and the gray level to be displayed is greater than or equal to the third preset gray level, it switches the first driving mode to the second driving mode. In the first driving mode, when the driving module detects that the gray level to be displayed is greater than the second preset gray level, or the gray level to be displayed is less than the fourth preset gray level, the first driving mode is switched to the second driving mode; the fourth preset gray level is less than the third preset gray level.
4. The display device according to claim 3, characterized in that, The gray level difference between the third preset gray level and the fourth preset gray level is greater than or equal to 2.
5. The display device according to claim 3 or 4, characterized in that, If the grayscale to be displayed alternately jumps to the third grayscale and the fourth grayscale, and the third grayscale is less than the fourth preset grayscale, and the fourth grayscale is greater than the fourth preset grayscale, then the third preset grayscale is greater than the fourth grayscale.
6. The display device according to claim 1, characterized in that, The first driving mode and the second driving mode are respectively selected from one of frame flip, column flip, row flip, two-row flip, two-column flip and point flip, and the first driving mode and the second driving mode are different.
7. The display device according to claim 1, characterized in that, The driving module includes a timing controller, which is used to detect the grayscale to be displayed.
8. The display device according to claim 7, characterized in that, The driving module also includes a system chip, which is connected to the timing controller and is used to send the grayscale to be displayed to the timing controller.