Display driving method, display driving device and liquid crystal display device

Abstract

The embodiment of the present application discloses a display driving method, a display driving device and a liquid crystal display device. The display driving method is applied to the display driving device. The display driving device comprises a local dimming module, a first storage module and a liquid crystal control module. The local diming module outputs a control signal when outputting a backlight adjusting signal, so as to instruct the first storage module to output previous frame data. The liquid crystal control module outputs a liquid crystal adjusting signal according to the previous frame data output by the first storage module. That is, when the local dimming module outputs the backlight adjusting signal corresponding to the previous frame data, the liquid crystal control module outputs the liquid crystal adjusting signal corresponding to the previous frame data. The backlight adjusting signal for controlling the liquid crystal panel to display an image and the liquid crystal adjusting signal correspond to the same frame data (the previous frame data). The display brightness of the backlight panel driven by the display driving method matches the brightness of the corresponding area of the liquid crystal panel, and the display effect is ensured.

Description

Technical Field

[0001] This application relates to the field of liquid crystal display technology, specifically to a display driving method, a display driving device, and a liquid crystal display apparatus. Background Technology

[0002] Compared to traditional backlighting, LCD TVs using Mini-LED as their backlight source can significantly reduce the size of the television. If an LCD TV incorporates Local Dimming technology, meaning it can control the switching and brightness adjustment of corresponding backlight areas in real time based on the brightness and darkness of different parts of the screen, it results in deeper blacks, brighter whites, and more natural and vibrant colors, providing a truly immersive visual experience. This allows for a compact size and excellent display quality.

[0003] Practical experience has shown that when LCD TVs using Local Dimming technology display the image corresponding to the current frame of the TV signal on the LCD panel, the brightness of the backlight panel corresponds to the previous frame of the TV signal. Because the image displayed on the LCD panel and the brightness of the backlight panel correspond to different frames of TV signals at the same time, the brightness of the local backlight often does not match the brightness of the corresponding area of ​​the LCD panel (i.e., it is impossible to achieve a deeper black and a brighter white), which affects the display effect of the LCD TV. Summary of the Invention

[0004] This application discloses a display driving method, a display driving device, and a liquid crystal display device. By driving the liquid crystal panel and the backlight panel through the display driving method, the brightness of the backlight panel can be matched with the brightness of the corresponding area of ​​the liquid crystal panel, thereby improving the display effect of the liquid crystal display device.

[0005] This application discloses a display driving method applied to a display driving device. The display driving device is disposed in a liquid crystal display device, which includes a liquid crystal panel and a backlight panel. The backlight panel is used to provide backlight for the liquid crystal panel. The display driving device includes a local dimming module, a first storage module, and a liquid crystal control module. The first storage module stores data from the previous frame. The display driving method includes:

[0006] The local dimming module receives the current frame data and generates a backlight adjustment signal based on the received previous frame data. When outputting the backlight adjustment signal, it outputs a control signal, which is used to control the backlight panel to emit light.

[0007] The first storage module and the local dimming module simultaneously receive the current frame data and, in response to the control signal, output the previous frame data;

[0008] The liquid crystal control module receives the previous frame data output by the first storage module, and outputs a liquid crystal adjustment signal according to the previous frame data output by the first storage module. The liquid crystal adjustment signal is used to control the liquid crystal panel to display an image.

[0009] As an optional implementation, the step of outputting the previous frame data in response to the control signal includes:

[0010] When the local dimming module outputs a backlight adjustment signal, the first storage module responds to the control signal and outputs the previous frame data, so that when the local dimming module outputs a backlight adjustment signal corresponding to the previous frame data, the liquid crystal control module outputs a liquid crystal adjustment signal corresponding to the previous frame data.

[0011] This application discloses a display driving device applied to a liquid crystal display device. The liquid crystal display device includes a liquid crystal panel and a backlight panel. The backlight panel is used to provide backlight for the liquid crystal panel. The display driving device includes:

[0012] A local dimming module is used to receive current frame data and generate a backlight adjustment signal based on the previous frame data. It is also used to output a control signal when outputting the backlight adjustment signal, and the backlight adjustment signal is used to control the backlight panel to emit light.

[0013] A first storage module is connected to the local dimming module. The first storage module stores the previous frame data. The first storage module is used to receive and store the current frame data simultaneously with the local dimming module, and output the stored previous frame data when the control signal is received.

[0014] A liquid crystal control module is connected to the first storage module and is used to receive the previous frame data output by the first storage module, and output a liquid crystal adjustment signal according to the previous frame data output by the first storage module. The liquid crystal adjustment signal is used to control the display of images on the liquid crystal panel.

[0015] As an optional implementation, when the local dimming module receives the current frame data, the local dimming module generates and outputs the backlight adjustment signal based on the previous frame data. When the local dimming module outputs the backlight adjustment signal, the first storage module outputs the previous frame data, and the liquid crystal control module receives the previous frame data output by the first storage module, so that when the local dimming module outputs the backlight adjustment signal corresponding to the previous frame data, the liquid crystal control module outputs the liquid crystal adjustment signal corresponding to the previous frame data.

[0016] This application discloses a display driving device applied to a liquid crystal display device. The liquid crystal display device includes a liquid crystal panel and a backlight panel. The backlight panel is used to provide backlight for the liquid crystal panel. The display driving device includes:

[0017] A local dimming module is used to receive current frame data and generate a backlight adjustment signal based on the current frame data. It is also used to output a control signal when outputting the backlight adjustment signal, and the backlight adjustment signal is used to control the backlight panel to emit light.

[0018] The first storage module is connected to the local dimming module and is used to receive and store the current frame data, and also to output the stored current frame data when the control signal is received.

[0019] A liquid crystal control module, connected to the first storage module, is used to receive the current frame data output by the first storage module and output a liquid crystal adjustment signal according to the current frame data. The liquid crystal adjustment signal is used to control the liquid crystal panel to display an image.

[0020] As an optional implementation, the display driver further includes a decoding module, which is connected to the local dimming module and the first storage module respectively. The decoding module is used to receive video data of the current frame and convert the video data into RGB data, where the RGB data is the current frame data.

[0021] As an optional implementation, the liquid crystal control module includes:

[0022] A determining unit is configured to receive the current frame data and determine the adjustment coefficient based on the current frame data;

[0023] An optimization unit, connected to both the determining unit and the first storage module, is used to adjust the current frame data according to the adjustment coefficient, and the adjusted current frame data serves as the liquid crystal adjustment signal.

[0024] As an optional implementation, the display driving device further includes a timing control module, a liquid crystal encoding module, and a liquid crystal driving module;

[0025] The timing control module is connected to the liquid crystal adjustment module and is used to generate a timing signal according to the liquid crystal adjustment signal, and output the timing signal and the liquid crystal adjustment signal.

[0026] The liquid crystal encoding module is connected to the timing control module and the liquid crystal driving module respectively, and is used to encode the timing signal and the liquid crystal adjustment signal according to the communication type of the liquid crystal driving module;

[0027] The liquid crystal driving module is used to connect to the liquid crystal panel and drive the liquid crystal panel to display the image according to the encoded timing signal and the encoded liquid crystal adjustment signal.

[0028] As an optional implementation, the display driving device further includes a backlight encoding module and a backlight driving module;

[0029] The backlight encoding module is connected to the local dimming module and the backlight driving module respectively, and is used to encode the backlight adjustment signal according to the communication type of the backlight driving module;

[0030] The backlight driving module is used to connect to the backlight panel and drive the backlight panel to emit light according to the encoded backlight adjustment signal.

[0031] As an optional implementation, the liquid crystal encoding module is preset with an encoding method corresponding to the communication type of the liquid crystal driving module, and / or the backlight encoding module is preset with an encoding method corresponding to the communication type of the backlight driving module.

[0032] As an optional implementation, the display driving device further includes a second storage module for storing preset parameters;

[0033] The second storage module is connected to the liquid crystal encoding module, and the preset parameters include a first parameter, which indicates the communication type of the liquid crystal driving module; and / or,

[0034] The second storage module is connected to the backlight encoding module, and the preset parameters include a second parameter, which is used to indicate the communication type of the backlight driving module.

[0035] As an optional implementation, the display driving device further includes a power supply module, which is connected to the backlight driving module and the liquid crystal driving module respectively, and is used to provide voltage to the backlight driving module and the liquid crystal driving module.

[0036] As an optional implementation, the liquid crystal panel includes a switching device, and the power module includes:

[0037] The operating voltage unit is connected to the backlight driving module and the liquid crystal driving module respectively, and is used to provide operating voltage to the backlight driving module and the liquid crystal driving module;

[0038] A switching voltage unit, connected to the liquid crystal driving module, is used to provide a shutdown voltage to turn off the switching device and / or an on voltage to turn on the switching device;

[0039] A reference voltage unit, connected to the liquid crystal driving module, is used to provide a reference voltage for the data voltage of the liquid crystal panel.

[0040] This application discloses a liquid crystal display device, including:

[0041] Backlight panel;

[0042] LCD panel;

[0043] As disclosed in any of the display driving devices in the embodiments of this application, the backlight adjustment signal is used to control the backlight panel to emit light, and the liquid crystal adjustment signal is used to control the liquid crystal panel to display images.

[0044] Compared with related technologies, the embodiments of this application have the following beneficial effects:

[0045] The display driving method provided in this application is applied to a display driving device, which includes a local dimming module, a first storage module, and a liquid crystal control module. When the local dimming module outputs a backlight adjustment signal, it outputs a control signal to instruct the first storage module to output the previous frame data. The liquid crystal control module then outputs a liquid crystal adjustment signal according to the previous frame data output by the first storage module. That is, when the local dimming module outputs a backlight adjustment signal corresponding to the previous frame data, the liquid crystal control module outputs a liquid crystal adjustment signal corresponding to the previous frame data, so that the backlight adjustment signal controlling the display image of the liquid crystal panel and the backlight panel emitting light correspond to the same frame data (the previous frame data). The display brightness of the backlight panel driven by this display driving method matches the brightness of the corresponding area of ​​the liquid crystal panel, ensuring the display effect. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.

[0047] Figure 1 This is a schematic diagram of the structure of a liquid crystal display device disclosed in an embodiment of this application;

[0048] Figure 2 This is a schematic diagram of the structure of a display driving device disclosed in an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of another display driving device disclosed in an embodiment of this application;

[0050] Figure 4This is a schematic diagram of the structure of another display driving device disclosed in the embodiments of this application;

[0051] Figure 5 This is a schematic diagram of another display driving device disclosed in the embodiments of this application;

[0052] Figure 6 This is a schematic diagram of the module structure of a power supply module disclosed in an embodiment of this application;

[0053] Figure 7 This is a flowchart illustrating a display driving method disclosed in an embodiment of this application. Detailed Implementation

[0054] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0055] 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 application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0056] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0057] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0058] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0059] As described in the background technology, Local Dimming technology controls the switching and brightness of the corresponding backlight areas in real time according to the bright and dark fields of various parts of the TV signal, making blacks deeper, whites whiter, and colors more natural and vibrant, bringing the best immersive experience with a sense of visual realism.

[0060] The inventors discovered that because the driving systems of Mini-LED panels and OC panels (Open Cell, LCD panels) are independent, and because Local Dimming driving technology requires acquiring a complete frame of video data and performing calculations and analyses based on this complete frame of video data to generate backlight adjustment signals, if the LCD driving module and the backlight module (the module with Local Dimming driving function) simultaneously receive the current frame of video data, the backlight module will only receive a complete frame of the current frame of video data when the LCD driving module starts receiving the next frame of video data and drives the LCD panel to display the image of the next frame of video data. Only then can the backlight module calculate the brightness of each area of ​​the backlight based on the complete current video data. In other words, when the LCD panel displays the next frame of video data, the backlight panel will only display a backlight brightness that matches the current frame of video data. This often results in a mismatch between the brightness of the local backlight and the brightness of the corresponding area of ​​the LCD panel (i.e., it is impossible to achieve a deeper black and a brighter white), affecting the display effect of the LCD TV.

[0061] In view of this, embodiments of this application provide a display driving device that can be used to control the display of a liquid crystal panel and control the backlight panel to emit light, thereby matching the brightness of the backlight panel with the brightness of the corresponding area of ​​the liquid crystal panel and improving the display effect of the liquid crystal display device.

[0062] like Figure 1 The image illustrates a liquid crystal display device provided in an embodiment of this application. The liquid crystal display device may include a liquid crystal panel 110 and a backlight panel 120, the backlight panel 120 being used to provide backlighting for the liquid crystal panel 110. Optionally, the backlight panel 120 may be an LED panel. Optionally, the backlight panel 120 may be a Mini-LED panel.

[0063] Please refer to Figure 2 It illustrates a display driving device provided in an embodiment of this application, such as... Figure 2 As shown, the display driving device includes a local dimming module 131, a first storage module 132, and a liquid crystal control module 133, wherein the first storage module 132 is connected to the local dimming module 131 and the liquid crystal control module 133 respectively.

[0064] The local dimming module 131 receives the current frame data and generates a backlight adjustment signal based on the previous frame data. It also outputs a control signal when outputting the backlight adjustment signal. The first storage module 132 stores the previous frame data. It receives and stores the current frame data and outputs the stored previous frame data upon receiving the control signal. The liquid crystal adjustment module 133 receives the previous frame data output by the first storage module 132 and outputs a liquid crystal adjustment signal based on the previous frame data. The backlight adjustment signal can be used to control the backlight panel to emit light, and the liquid crystal adjustment signal can be used to control the liquid crystal panel to display images.

[0065] It should be noted that the previous frame data and the current frame data are adjacent frame data. The current frame data is the frame data received by the local dimming module 131 and the first storage module 132 in the current time period, while the previous frame data is the frame data received by the local dimming module 131 and the first storage module 132 in the previous time period. The duration of both the previous time period and the current time period is the duration required to receive a complete frame data. The local dimming module 131 is a module with LocalDimming function, that is, the local dimming module 131 can generate backlight adjustment signals to adjust the brightness of each area of ​​the backlight panel according to a complete frame data. The backlight adjustment signal can be used to instruct the backlight panel area corresponding to the display of a bright image area on the liquid crystal panel to increase the brightness, or it can be used to instruct the backlight panel area corresponding to the display of a dark image area on the liquid crystal panel to decrease the brightness, or even turn it off, to achieve the effect of making blacks darker and whites whiter. The first storage module 132 can store a complete frame data. Optionally, the first storage module 132 may include a frame buffer for storing frame data (including current frame data and previous frame data). In one embodiment, the first storage module 132 may periodically clear the stored frame data to ensure that the storage space of the first storage module 132 is sufficient to store at least two complete frames of data. The liquid crystal adjustment module 133 may be used to generate a liquid crystal adjustment signal based on the previous frame data. This liquid crystal adjustment signal may be used to adjust the alignment of the liquid crystal material in the liquid crystal panel so that the liquid crystal panel displays an image corresponding to the previous frame data. It is understood that the above embodiments describe the operation of the local dimming module 131, the first storage module 132, and the liquid crystal adjustment module 133 in the current time period. Corresponding to the previous time period, the local dimming module 131 is used to receive the previous frame data and generate a backlight adjustment signal based on the previous two frames data. It is also used to output a control signal when outputting the backlight adjustment signal. The first storage module 132 stores the previous two frames data. The first storage module 132 is used to receive and store the current frame data. It is also used to output the stored previous two frames data when the control signal is received. The liquid crystal adjustment module 133 is used to receive the previous two frames data output by the first storage module 132 and output a liquid crystal adjustment signal based on the previous two frames data.

[0066] It should be noted that, since the local dimming module 131 received the previous frame data in the previous time period, it has received the complete previous frame data in the current time period and generates a backlight adjustment signal corresponding to the previous frame data. Because the first storage module 132 received and stored the previous frame data in the previous time period, it has stored the complete previous frame data in the current time period.

[0067] In one embodiment, when the local dimming module 131 receives the current frame data, it generates and outputs a backlight adjustment signal based on the previous frame data. When the local dimming module 131 outputs the backlight adjustment signal, the first storage module 132 outputs the previous frame data, and the liquid crystal control module 133 receives the previous frame data output by the first storage module 132, so that when the local dimming module 131 outputs the backlight adjustment signal corresponding to the previous frame data, the liquid crystal control module 133 outputs the liquid crystal adjustment signal corresponding to the previous frame data.

[0068] It should be noted that, as described in the above embodiments, since the current frame data and the previous frame data are two adjacent frames, when the local dimming module 131 receives the current frame data, it has already received a complete frame of the previous frame data. At this time, the local dimming module 131 can generate a backlight adjustment signal based on the previous frame data. That is, at this time, the backlight adjustment signal corresponds to the previous frame data. When the local dimming module 131 outputs the backlight adjustment signal corresponding to the previous frame output, it also outputs a control signal to the first storage module 132. The signal instructs the first storage module 132 to output the stored previous frame data (the frame data received and stored by the first storage module 132 at the previous moment) to the liquid crystal control module 133. The liquid crystal control module 133 receives the previous frame data output by the first storage module 132 and outputs a liquid crystal adjustment signal according to the previous frame data. This ensures that the liquid crystal adjustment signal output by the liquid crystal control module 133 corresponds to the previous frame data at the current moment, thereby making the driving signals of the liquid crystal panel and the backlight panel correspond to the same frame data at the current moment.

[0069] In one embodiment, the local dimming module 131 may include a first input interface, a first output interface, and a second output interface; the first storage module 132 may include a second input interface, a third input interface, and a third output interface; and the liquid crystal control module 133 may include a fourth input interface and a fourth output interface. The first output interface of the local dimming module 131 is connected to the third input interface of the first storage module 132, and the third output interface of the first storage module 132 is connected to the fourth input interface of the liquid crystal control module 133. The first input interface of the local dimming module 131 is used to receive current frame data, the first output interface is used to output a control signal, and the second output interface is used to output a backlight adjustment signal. The second input interface of the first storage module 132 is used to receive current frame data, the third input interface is used to receive the control signal, and the third output interface is used to output previous frame data. The fourth input interface of the liquid crystal control module 133 is used to receive previous frame data, and the fourth output interface of the liquid crystal control module 133 is used to output a liquid crystal adjustment signal. Optionally, the first storage module 132 and the local dimming module 131 simultaneously receive current frame data.

[0070] The display driving device provided in this embodiment includes a local dimming module 131, a first storage module 132, and a liquid crystal adjustment module 133. The first storage module 132 is connected to both the local dimming module 131 and the liquid crystal adjustment module 133. The local dimming module 131 and the first storage module 132 receive current frame data. When the local dimming module 131 outputs a backlight adjustment signal generated based on the previous frame data, it outputs a control signal. Upon receiving the control signal, the first storage module 132 outputs the stored previous frame data. The liquid crystal adjustment module 133 then outputs a liquid crystal adjustment signal based on the previous frame data output by the first storage module 132. In this embodiment, by setting a first storage module 132, the liquid crystal adjustment module receives the previous frame data only when the backlight adjustment module generates a backlight adjustment signal corresponding to the previous frame data, and outputs a liquid crystal adjustment signal according to the previous frame data. This ensures that at the current moment, both the liquid crystal adjustment signal controlling the display of the liquid crystal panel and the backlight adjustment signal controlling the display of the backlight panel correspond to the previous frame data. This avoids the problem of mismatch between the brightness of the backlight panel and the image displayed on the liquid crystal panel caused by the local dimming module 131 needing to acquire a complete frame of data before outputting a backlight adjustment signal corresponding to that frame of data. This ensures that the display brightness of the backlight panel driven by the display driving device matches the brightness of the corresponding area of ​​the liquid crystal panel, guaranteeing the display effect.

[0071] Please refer to Figure 3 It illustrates another display driving device provided in the embodiments of this application, such as... Figure 3 As shown, the display driving device may further include a decoding module 134, which is connected to the local dimming module 131 and the first storage module 132 respectively. The decoding module 134 is used to receive the video data of the current frame and convert the video data into RGB (Red, Green, Blue) data. It can be understood that RGB data is the current frame data.

[0072] It should be noted that RGB data refers to data in RGB signal format. The decoding module 134 can be used to convert the signal format of video data into RGB signal format. In one embodiment, the decoding module 134 can be used to convert at least one of eDP (Embedded Display Port), HDMI (High Definition Multimedia Interface), MIPI (Mobile Industry Processor Interface), VBO (V-By-One), and LVDS (Low-Voltage Differential Signaling) into RGB signal format.

[0073] The display driver device provided in this embodiment is equipped with a decoding module 134, enabling it to adapt to various video signal formats. The decoding module 134 can convert signals of non-target formats into data of the target format (RGB signal format), allowing the local dimming module 131 and the liquid crystal adjustment module 133 to process the received frame data and obtain backlight adjustment signals and liquid crystal adjustment signals. It is understood that when the video data signal format is RGB signal format, the decoding module 134 can directly output the video data to the local dimming module 131 and the first storage module 132.

[0074] Please continue to refer to this. Figure 3 The liquid crystal control module 133 may include a determining unit 133a and an optimizing unit 133b, such as Figure 2As shown, the optimization unit 133b is connected to both the determination unit 133a and the first storage module 132. The determination unit 133a can be used to determine adjustment coefficients based on the previous frame data. The optimization unit 133b is used to adjust the previous frame data output by the first storage module 132 according to the adjustment coefficients output by the determination unit 133a, and the adjusted previous frame data serves as the liquid crystal adjustment signal. It should be noted that the adjusted previous frame data can improve the display effect of the liquid crystal display device. In one embodiment, the adjustment coefficients can be used to improve image brightness and contrast, make the image appear more consistent with the characteristics of the human eye, and / or reduce the power consumption of the liquid crystal display device. In one embodiment, the determining unit 133a may include, but is not limited to, functions such as HDR (High Dynamic Range Imaging), Gamma correction, and ECO (Ecology, Conservation, and Optimization). That is, the determining unit 133a can output corresponding adjustment coefficients, and the optimization unit 133b adjusts the previous frame data output by the first storage module 132 according to the adjustment coefficients output by the determining unit 133a to obtain the adjusted previous frame data, thereby improving the display effect of the liquid crystal display device.

[0075] In one embodiment, the determining unit 133a can be used to simultaneously receive the previous frame data with the local dimming module 131 and the first storage module 132, so that the determining unit 133a can determine the adjustment coefficient based on the previous frame data (the previous frame can be obtained). In one embodiment, the determining unit 133a includes a fifth input interface and a fifth output interface, and the optimization unit 133b includes a sixth input interface, a seventh input interface, and a sixth output interface. The fifth input interface of the determining unit 133a is used to receive the current frame data. Optionally, the fifth input interface of the determining unit 133a is connected to the decoding module 134, and the determining unit 133a, the local dimming module 131, and the first storage module 132 simultaneously receive the current frame data. The fifth output interface of the determining unit 133a is connected to the sixth input interface of the optimization unit 133b to receive the adjustment coefficient. The seventh input interface of the optimization unit 133b is connected to the third output interface of the first storage module 132 to receive the previous frame data output by the first storage module 132. The sixth output interface of the optimization unit 133b is used to output the adjusted previous frame data.

[0076] In this embodiment, by setting a liquid crystal control module 133 including a determining unit 133a and an optimization unit 133b, the display effect of the liquid crystal display device can be improved.

[0077] Please refer to Figure 4This illustrates yet another display driving device provided in an embodiment of this application, such as... Figure 4 The display driving device may further include a timing control module 135, a liquid crystal encoding module 136, and a liquid crystal driving module 137. The timing control module 135 is connected to the liquid crystal control module 133, the liquid crystal encoding module 136 is connected to both the timing control module 135 and the liquid crystal driving module 137, and the liquid crystal driving module 137 is used to connect to the liquid crystal panel 110.

[0078] It should be noted that the timing control module 135 is used to receive the liquid crystal adjustment signal, generate a timing signal based on the liquid crystal adjustment signal, and output the timing signal and the liquid crystal adjustment signal. The liquid crystal encoding module 136 is used to encode the timing signal and the liquid crystal adjustment signal according to the communication type of the liquid crystal driving module 137. The liquid crystal driving module 137 receives the encoded timing signal and the encoded liquid crystal adjustment signal, and drives the liquid crystal panel 110 to display an image based on the encoded timing signal and the encoded liquid crystal adjustment signal.

[0079] Optionally, the timing control module 135 can be connected to the optimization unit to receive the adjusted data of the previous frame, i.e., the liquid crystal adjustment signal. Optionally, the timing control module 135 may include a T-con (Timing controller). It is understood that the communication type is related to the communication interface and communication protocol. For example, the communication type of the liquid crystal driving module 137 can be determined according to the connection interface between the liquid crystal driving module 137 and the liquid crystal encoding module 136, or the communication protocol of the liquid crystal driving module 137. Different liquid crystal driving modules 137 can receive (or recognize) different signal formats. The display driving device provided in this embodiment is equipped with a liquid crystal encoding module 136, which allows the timing signal and liquid crystal adjustment signal output by the timing control module 135 to be processed by the liquid crystal driving module 137 to drive the liquid crystal panel 110 to display the image corresponding to the timing signal and liquid crystal adjustment signal. Optionally, the liquid crystal encoding module 136 can be used to output timing signals and liquid crystal adjustment signals in mini-LVDS (mini Low Voltage Differential Signaling) and / or p2p (peer-to-peer) signal formats. That is, the liquid crystal encoding module 136 can encode the timing signals and liquid crystal adjustment signals into signals in mini-LVDS and / or p2p signal formats so that the liquid crystal driving module 137 can recognize them.

[0080] In one embodiment, the liquid crystal encoding module 136 is pre-set with an encoding method corresponding to the communication type of the liquid crystal driving module 137. By pre-setting this encoding method in the liquid crystal encoding module 136, the liquid crystal driving module 137 can receive identification timing signals and liquid crystal adjustment signals to drive the liquid crystal panel 110 to display an image corresponding to the previous frame of data in the current time period. Optionally, the liquid crystal driving module 137 may include a liquid crystal driving chip.

[0081] Please continue to refer to this. Figure 4 The display driving device may also include a backlight encoding module 138 and a backlight driving module 139. For example... Figure 4 As shown, the backlight encoding module 138 is connected to the local dimming module 131 and the backlight driving module 139 respectively, and the backlight driving module 139 is used to connect to the backlight panel 120.

[0082] It should be noted that the backlight encoding module 138 is used to encode the backlight adjustment signal according to the communication type of the backlight driving module 139, and the backlight driving module 139 is used to drive the backlight panel 120 to emit light according to the encoded backlight adjustment signal. It is understood that the communication type is related to the communication interface and communication protocol. For example, the communication type of the backlight driving module 139 can be determined according to the connection interface between the backlight driving module 139 and the backlight encoding module 138, or the communication protocol of the backlight driving module 139. Different backlight driving modules 139 can receive (or recognize) different signal formats. The display driving device provided in this embodiment is equipped with a backlight encoding module 138, which can encode the backlight adjustment signal output by the local dimming module 131, so that the backlight driving module 139 can receive or recognize the backlight adjustment signal to drive the backlight panel 120 to emit light accordingly.

[0083] In one embodiment, the backlight encoding module 138 is pre-set with an encoding method corresponding to the communication type of the backlight driving module 139. By pre-setting the above encoding method in the backlight encoding module 138, the backlight driving module 139 can receive and identify backlight adjustment signals to drive the backlight panel 120 to display the brightness corresponding to the previous frame of data in the current time period. Optionally, the backlight driving module 139 may include a backlight driving chip, such as an LED driver chip.

[0084] Please continue to refer to this. Figure 4 In one embodiment, the display driving device may further include a second storage module 140 for storing preset parameters, which may be used to indicate data types and / or information (such as communication types) of each driving module (liquid crystal driving module 137 and / or backlight driving module 139).

[0085] In one embodiment, such as Figure 4As shown, the second storage module 140 is connected to the liquid crystal encoding module 136. The preset parameters include a first parameter, which indicates the communication type of the liquid crystal driving module 137. In this embodiment, by connecting the liquid crystal encoding module 136 to the second storage module 140, the liquid crystal encoding module 136 can determine the communication type of the liquid crystal driving module 137 based on the first parameter. In one embodiment, the liquid crystal encoding module 136 has multiple preset encoding methods, each corresponding to a different communication type of the liquid crystal driving module 137. Through the second storage module 140, the liquid crystal encoding module 136 can determine the communication type of the liquid crystal driving module 137, thereby enabling the encoded timing signal and liquid crystal adjustment signal to be received and recognized by the liquid crystal driving module 137.

[0086] In one embodiment, such as Figure 4 As shown, the second storage module 140 is connected to the backlight encoding module 138. The preset parameters include a second parameter, which indicates the communication type of the backlight driving module 139. In this embodiment, by connecting the backlight encoding module 138 to the second storage module 140, the backlight encoding module 138 can determine the communication type of the backlight driving module 139 based on the second parameter. In one embodiment, the backlight encoding module 138 has multiple preset encoding methods, each corresponding to a backlight driving module 139 with different communication types. Through the second storage module 140, the backlight encoding module 138 can determine the communication type of the backlight driving module 139, thereby enabling the encoded backlight adjustment signal to be received and recognized by the backlight driving module 139.

[0087] In one embodiment, such as Figure 4 As shown, the second storage module 140 is also connected to the decoding module 134. The preset parameters include a third parameter, which is used to indicate the signal format of the video data of the current frame, so that the decoding module 134 can convert the video data into RGB data.

[0088] In one embodiment, the preset parameters may also include parameters such as resolution (e.g., the resolution of the liquid crystal driving module 137). The second storage module 140 may be connected to at least one of the local dimming module 131, the first storage module 132, the determining unit, and the timing control module 135. At least one of the local dimming module 131, the first storage module 132, the determining unit, and the timing control module 135 may determine the required parameters from the second storage module 140 to generate a suitable signal.

[0089] Optionally, the second storage module 140 may include a ROM (Read-Only Memory). In one embodiment, preset parameters are pre-written into the second storage module 140, and each module that needs to obtain the preset parameters is connected to the second storage module 140, so that the display driver can adapt to various input signals and / or drive modules.

[0090] In one embodiment, the display driver device provided in the above embodiments can be implemented based on an FPGA (Field Programmable Gate Array), that is, the display driver device provided in the above embodiments can be integrated into an FPGA. Optionally, the FPGA is provided with an IO (Input / Output) interface, which can be used to access video data, and the signal format of the video data can be VBO signal format.

[0091] Please refer to Figure 5 This illustrates yet another display driving device provided in an embodiment of this application, such as... Figure 5 As shown, the display driving device may further include a power supply module 141, which is connected to both the backlight driving module 139 and the liquid crystal driving module 137. The power supply module 141 provides voltage to both modules, enabling the backlight driving module 139 to drive the backlight panel 120 to emit light and the liquid crystal driving module 137 to drive the liquid crystal panel 110 to display. The power supply module 141 satisfies the display requirements of both the backlight panel 120 and the liquid crystal panel 110.

[0092] Understandably, the liquid crystal panel 110 may include switching devices. For example, the switching devices may include TFTs (Thin Film Transistors), with each pixel having one switching device to control the arrangement of the liquid crystal material at the corresponding pixel.

[0093] Please refer to Figure 6 It shows a structural schematic diagram of a power module provided in an embodiment of this application, such as... Figure 6As shown, the power supply module 141 may include a working voltage unit 141a, a switching voltage unit 141b, and a reference voltage unit 141c. The working voltage unit 141a is connected to both the backlight driving module 139 and the liquid crystal driving module 137, providing working voltages to ensure their normal operation. The switching voltage unit 141b is connected to the liquid crystal driving module 137, providing a turn-off voltage (VGL) to disable the switching devices and / or a turn-on voltage (VGH) to enable them. The reference voltage unit 141c is connected to the liquid crystal driving module 137, providing a reference voltage for the data voltage of the liquid crystal panel 110; different reference voltages can be used to control different brightness levels of the liquid crystal panel display. Optionally, the reference voltage unit 141c can provide 11 different reference voltages (GM0-GM10), and the liquid crystal driving module 137 can be used to divide the 11 reference voltages into a total of 256 voltages. These 256 voltages correspond to data voltages 0-255, so that each of the three colors RGB has 256 brightness levels.

[0094] In one embodiment, the operating voltage unit 141a can be used to convert the input DC voltage into the operating voltage or current required by the backlight driving module 139 and the liquid crystal driving module 137, and / or the voltage or current required for the LEDs of the backlight panel to emit light. Optionally, the input DC voltage is a 12V DC voltage, and the operating voltage unit 141a can be used to convert 12V to at least one of 5V, 3.3V, or 1.8V. Optionally, such as Figure 6 As shown, when the backlight driving module 139 and the liquid crystal driving module 137 operate at the same voltage, they can be connected to the same output interface of the operating voltage unit 141a to obtain the same operating voltage. Optionally, with Figure 6 As shown, the backlight driving module 139 and the liquid crystal driving module 137 operate at different voltages. The backlight driving module 139 and the liquid crystal driving module 137 can be connected to different output interfaces of the operating voltage unit to obtain different operating voltages.

[0095] In one embodiment, the operating voltage unit 141a, the switching voltage unit 141b, and the reference voltage unit 141c are all used to connect to a first DC voltage. Specifically, the operating voltage unit 141a can convert the first DC voltage into the operating voltage required by the backlight driving module 139 and the liquid crystal driving module 137; the switching voltage unit 141b can convert the first DC voltage into a shutdown voltage and an on voltage; and the reference voltage can be used to convert the first DC voltage into a reference voltage for the data voltage of the liquid crystal panel. Optionally, the first DC voltage can be 12V.

[0096] In one embodiment, the display driver device provided in the above embodiment can be implemented based on an ASIC (Application Specific Integrated Circuit), that is, the display driver device can be integrated into an ASIC. Optionally, the ASIC is provided with at least two input interfaces (hereinafter referred to as the eighth input interface and the ninth input interface). The eighth input interface is used to access video data, and the ninth input interface is used to access power signals (such as a 12V DC voltage signal).

[0097] Please continue to refer to this. Figure 1 ,like Figure 1 The liquid crystal display device may include a liquid crystal panel 110, a backlight panel 120, and a display driving device 130 provided in any of the above embodiments. The backlight adjustment signal is used to control the backlight panel 120 to emit light, and the liquid crystal adjustment signal is used to control the liquid crystal panel 110 to display images.

[0098] Optionally, the backlight panel 120 is provided with multiple LED beads 121. Optionally, the multiple LED beads 121 are arranged in an array. Optionally, the LED beads 121 are LED beads.

[0099] In one embodiment, the display driving device 130 may include a first storage module, a local dimming module, a liquid crystal control module, a timing control module, a liquid crystal encoding module, a liquid crystal driving module, a backlight encoding module, and a backlight driving module. The timing control module is connected to the liquid crystal control module, the liquid crystal encoding module is connected to both the timing control module and the liquid crystal driving module, the liquid crystal driving module is connected to the liquid crystal panel 110, the backlight encoding module is connected to both the local dimming module and the backlight driving module, the backlight driving module is connected to the backlight panel 120, and the first storage module is connected to both the local dimming module and the liquid crystal control module. For a detailed description of the first storage module, liquid crystal control module, timing control module, liquid crystal encoding module, liquid crystal driving module, local dimming module, backlight encoding module, and backlight driving module, please refer to the embodiments described above; they will not be repeated here.

[0100] In this embodiment, by setting a first storage module that stores the data of the previous frame, when the local dimming module outputs a brightness adjustment signal corresponding to the data of the previous frame, the first storage module outputs the data of the previous frame to the liquid crystal control module under the instruction (control signal) of the local dimming module, so that the liquid crystal control module generates a liquid crystal control signal corresponding to the data of the previous frame. The brightness adjustment signal is transmitted to the backlight driving module through the backlight encoding module, thereby driving the backlight panel 120 to emit light. The liquid crystal adjustment signal is transmitted to the liquid crystal driving module through the timing control module and the liquid crystal encoding module, thereby driving the liquid crystal panel 110 to display an image, so that the brightness of the image displayed by the liquid crystal panel 110 corresponds to the brightness of the backlight panel 120 and the same frame of data (the data of the previous frame). That is, the brightness of the local backlight source matches the brightness of the corresponding area of ​​the liquid crystal panel 110, thereby improving the display effect of the liquid crystal display device.

[0101] Please refer to Figure 7 This illustrates a display driving method provided in an embodiment of this application. This display driving method can be applied to the display driving device provided in the above embodiments, such as... Figure 7 As shown, the display driving method may include steps S702 to S704.

[0102] S702, the local dimming module receives the current frame data, generates a backlight adjustment signal based on the received previous frame data, and outputs a control signal when outputting the backlight adjustment signal.

[0103] Among them, the backlight adjustment signal is used to control the backlight panel to emit light, and the previous frame data used by the local dimming module is the frame data received by the local dimming module in the previous time period of the current time period.

[0104] S704, the first storage module and the local dimming module simultaneously receive the current frame data and respond to the control signal to output the previous frame data.

[0105] The first storage module stores the previous frame data so that it can output the previous frame data to the liquid crystal control module.

[0106] S706, the liquid crystal control module receives the previous frame data output by the first storage module, and outputs a liquid crystal adjustment signal according to the previous frame data output by the first storage module.

[0107] The liquid crystal adjustment signal is used to control the display of images on the liquid crystal panel.

[0108] It should be noted that the descriptions of the local dimming module, the first storage module, and the liquid crystal control module are detailed in the embodiments above and will not be repeated here.

[0109] In one embodiment, when the local dimming module outputs a backlight adjustment signal, the first storage module responds to the control signal output by the local dimming module and outputs the previous frame data stored in the first storage module, so that when the local dimming module outputs a backlight adjustment signal corresponding to the previous frame, the liquid crystal control module outputs a liquid crystal adjustment signal corresponding to the previous frame data.

[0110] It should be noted that, since the first storage module outputs the previous frame data when the local dimming module outputs the backlight adjustment signal, the liquid crystal adjustment module outputs the liquid crystal adjustment signal corresponding to the previous frame data according to the previous frame data output by the first storage module when the local dimming module outputs the backlight adjustment signal, so that the liquid crystal adjustment signal controlling the display of the image on the liquid crystal panel and the backlight adjustment signal controlling the backlight panel to emit light correspond to the same frame data (the previous frame data).

[0111] The display driving method provided in this application is applied to a display driving device, which includes a local dimming module, a first storage module, and a liquid crystal control module. When the local dimming module outputs a backlight adjustment signal, it outputs a control signal to instruct the first storage module to output the previous frame data. The liquid crystal control module then outputs a liquid crystal adjustment signal based on the previous frame output by the first storage module. That is, when the local dimming module outputs a backlight adjustment signal corresponding to the previous frame data, the liquid crystal control module outputs a liquid crystal adjustment signal corresponding to the previous frame data. This ensures that the backlight adjustment signal controlling the display image on the liquid crystal panel and the backlight adjustment signal controlling the backlight panel to emit light correspond to the same frame data (the previous frame data). This avoids the problem of mismatch between the brightness of the backlight panel and the display image on the liquid crystal panel caused by the local dimming module needing to acquire a complete frame of data before outputting the backlight adjustment signal corresponding to that frame of data. This ensures that the display brightness of the backlight panel driven by this display driving method matches the brightness of the corresponding area of ​​the liquid crystal panel, guaranteeing the display effect.

[0112] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0113] 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.

[0114] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. 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 these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A display driving method, characterized by, The application is applied to a display driving device arranged in a liquid crystal display device, the liquid crystal display device comprising a liquid crystal panel and a backlight panel for providing backlight for the liquid crystal panel, the display driving device comprising a local dimming module, a first storage module and a liquid crystal control module, the first storage module storing previous frame data, and the display driving method comprising: The local dimming module receives current frame data, generates a backlight adjustment signal according to the received previous frame data, and outputs a control signal when outputting the backlight adjustment signal, the backlight adjustment signal being used to control the backlight panel to emit light; The first storage module receives the current frame data at the same time as the local dimming module, and outputs the previous frame data in response to the control signal when the local dimming module outputs the backlight adjustment signal, so that the liquid crystal control module outputs a liquid crystal adjustment signal corresponding to the previous frame data when the local dimming module outputs the backlight adjustment signal corresponding to the previous frame data; The liquid crystal control module receives the previous frame data output by the first storage module, and outputs a liquid crystal adjustment signal according to the previous frame data output by the first storage module, the liquid crystal adjustment signal being used to control the liquid crystal panel to display an image; The liquid crystal control module comprises: A determination unit for determining an adjustment coefficient according to the previous frame data, and for receiving the previous frame data at the same time as the local dimming module and the first storage module; An optimization unit connected with the determination unit and the first storage module respectively, for receiving the previous frame data, and for adjusting the previous frame data according to the adjustment coefficient, the adjusted previous frame data being used as the liquid crystal adjustment signal.

2. A display driving device, characterized by comprising: The application is applied to a liquid crystal display device, the liquid crystal display device comprising a liquid crystal panel and a backlight panel for providing backlight for the liquid crystal panel, the display driving device comprising: A local dimming module for receiving current frame data, and for generating a backlight adjustment signal according to previous frame data, and for outputting a control signal when outputting the backlight adjustment signal, the backlight adjustment signal being used to control the backlight panel to emit light; A first storage module connected with the local dimming module, the first storage module storing the previous frame data, the first storage module being used to receive and store the current frame data at the same time as the local dimming module, and for outputting the stored previous frame data when receiving the control signal, so that the liquid crystal control module outputs a liquid crystal adjustment signal corresponding to the previous frame data when the local dimming module outputs the backlight adjustment signal corresponding to the previous frame data; A liquid crystal control module connected with the first storage module, for receiving the previous frame data output by the first storage module, and for outputting a liquid crystal adjustment signal according to the previous frame data output by the first storage module, the liquid crystal adjustment signal being used to control the liquid crystal panel to display an image. The liquid crystal regulation module comprises: A determination unit is configured to determine an adjustment coefficient according to the previous frame data; the determination unit is also configured to receive the previous frame data simultaneously with the local dimming module and the first storage module; An optimization unit is connected with the determination unit and the first storage module respectively, configured to receive the previous frame data and adjust the previous frame data according to the adjustment coefficient, and the adjusted previous frame data is used as the liquid crystal regulation signal.

3. The display driving apparatus according to claim 2, wherein Further comprising a decoding module connected with the local dimming module and the first storage module respectively, the decoding module is configured to receive the current frame video data and convert the video data into RGB data, and the RGB data is the current frame data.

4. The display driving apparatus according to claim 2, wherein Further comprising a timing control module, a liquid crystal encoding module and a liquid crystal driving module; The timing control module is connected with the liquid crystal regulation module, configured to generate a timing signal according to the liquid crystal regulation signal and output the timing signal and the liquid crystal regulation signal; The liquid crystal encoding module is connected with the timing control module and the liquid crystal driving module respectively, configured to encode the timing signal and the liquid crystal regulation signal according to the communication type of the liquid crystal driving module; The liquid crystal driving module is configured to be connected with the liquid crystal panel and drive the liquid crystal panel to display the image according to the encoded timing signal and the encoded liquid crystal regulation signal.

5. The display driving apparatus according to claim 4, wherein Further comprising a backlight encoding module and a backlight driving module; The backlight encoding module is connected with the local dimming module and the backlight driving module respectively, configured to encode the backlight regulation signal according to the communication type of the backlight driving module; The backlight driving module is configured to be connected with the backlight panel and drive the backlight panel to emit light according to the encoded backlight regulation signal.

6. The display driving apparatus according to claim 5, wherein The liquid crystal encoding module is preconfigured with an encoding mode corresponding to the communication type of the liquid crystal driving module, and / or the backlight encoding module is preconfigured with an encoding mode corresponding to the communication type of the backlight driving module.

7. The display driving apparatus according to claim 5 or 6, wherein Further comprising a second storage module configured to store preset parameters; The second storage module is connected with the liquid crystal encoding module, and the preset parameters include a first parameter used to indicate the communication type of the liquid crystal driving module; And / or, The second storage module is connected with the backlight encoding module, and the preset parameters include a second parameter used to indicate the communication type of the backlight driving module.

8. A liquid crystal display device, characterized by comprising: Comprise: A backlight panel; A liquid crystal panel; The display driving device of any one of claims 2-7, the backlight regulation signal is used to control the backlight panel to emit light, and the liquid crystal regulation signal is used to control the liquid crystal panel to display an image.

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