Data processing method, display apparatus, and display

Abstract

A data processing method, a display apparatus, and a display. The method comprises: a control chip obtaining delay response feature data and display data of each frame drive cycle (S101); within each frame drive cycle, generating a light emission period control signal and a current signal according to the delay response feature data and the display data (S102); and according to the light emission period control signal and the current signal, not generating a drive signal within a delay period of LCD liquid crystal molecules of the frame drive cycle, and generating the drive signal within a PWM enabling period, so as to drive a backlight source to emit light (S103). Since a start time of the PWM enabling period is greater than or equal to an end time of the delay period of the LCD liquid crystal molecules, a user cannot view a blurred picture within the delay period of the LCD liquid crystal molecules, thereby ameliorating the motion blur phenomenon of a liquid-crystal display apparatus.

Description

Data processing method, display device and display

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 21, 2023, with application number 202310906738.3 and application name “Data processing method, display device and display”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to the field of LED displays, and in particular to a data processing method, a display device, and a display. Background Art

[0003] With the development of display technology, Mini LED has become a research hotspot for display devices due to its advantages such as energy saving, simple structure, small size and thinness.

[0004] A liquid crystal display device includes a control chip, a backlight circuit, and an LCD display. The backlight circuit provides backlighting when the LCD display displays images. The liquid crystal molecules in the LCD display immediately adjust their motion state after receiving the LCD drive signal at the initial stage of each frame. Correspondingly, the backlight circuit also adjusts its light-emitting state immediately after receiving backlight data at the initial stage of each frame. Because the response time of an LCD is much shorter than that of an LED, the LCD's motion state may not have reached the target state by the time the backlight circuit provides backlighting for the current frame, preventing the current frame from being displayed properly. Consequently, users may observe motion blur when viewing multiple frames of images containing rapidly moving objects played by the LCD display.

[0005] Therefore, how to improve the motion blur phenomenon of liquid crystal display devices has become a research focus.

[0006] Summary of the Invention

[0007] The present application provides a data processing method, a display device, and a display, which are used to solve the technical problem of motion blur phenomenon in liquid crystal display devices.

[0008] In a first aspect, an embodiment of the present application provides a data processing method, which is applied to a control chip and includes:

[0009] Obtaining delay response characteristic data and display data of each frame driving cycle;

[0010] In each frame driving cycle, generating a light emitting period control signal and a current signal according to the delayed response characteristic data and the display data;

[0011] According to the light-emitting period control signal and the current signal, no driving signal is generated during the delay period of the LCD liquid crystal molecules in the frame driving cycle; and a driving signal is generated during the PWM on period to drive the backlight light source to emit light;

[0012] The frame driving period sequentially includes a delay period of the LCD liquid crystal molecules and a PWM on period, and a start time of the PWM on period is greater than or equal to an end time of the delay period of the LCD liquid crystal molecules.

[0013] In the above technical solution, the control chip generates a light-emitting period control signal and a current signal according to the delayed response characteristic data of the LCD liquid crystal molecules, so that during the delay period of the LCD liquid crystal molecules at the beginning of each frame driving cycle when the state of the LCD liquid crystal molecules has not yet been completely transformed, no driving signal is generated, and the backlight light source does not emit light. After the delay period of the LCD liquid crystal molecules, during the PWM on period when the state of the LCD liquid crystal molecules has been completely transformed, a driving signal is generated, and the backlight light source provides backlight. Since the user cannot see the blurred picture during the LCD delay period, the motion blur phenomenon of the liquid crystal display device is improved.

[0014] Optionally, according to the light emitting period control signal and the current signal, not generating a driving signal within a delay period of the LCD liquid crystal molecules in a frame driving period, comprising:

[0015] determining a PWM off period according to the light emitting period control signal;

[0016] During the PWM off period, the driving signal is not generated;

[0017] The start time of the PWM off period is the same as the start time of the delay period of the LCD liquid crystal molecules, and the end time of the PWM off period is greater than or equal to the end time of the delay period of the LCD liquid crystal molecules;

[0018] The start time of the PWM on period is equal to the end time of the PWM off period.

[0019] Optionally, generating a driving signal in a PWM on period according to the light emitting period control signal and the current signal to drive the backlight light source to emit light includes:

[0020] Determining a PWM on period according to the light-emitting period control signal; the light-emitting period control signal includes a PWM signal;

[0021] During the PWM on period, a driving signal is generated according to the PWM signal and the current signal to drive the backlight light source to emit light.

[0022] In the above technical solution, the control chip determines the PWM off period and the PWM on period in the frame drive cycle according to the light-emitting period control signal, thereby determining the period for generating the drive signal using the PWM signal and the current signal to drive the backlight light source to emit light. Since the end time of the PWM off period is greater than or equal to the delay period of the LCD liquid crystal molecules, the backlight provided by the backlight light source will not be obtained before the state of the LCD liquid crystal molecules is completely transformed, and the user will not observe a blurred image, thereby improving the motion blur phenomenon of the liquid crystal display device.

[0023] Optionally, the delayed response characteristic data includes PWM off time length and / or PWM on time length;

[0024] In each frame driving cycle, generating a light emitting period control signal and a current signal according to the delayed response characteristic data and the display data, including:

[0025] Obtaining a frame start signal for each frame driving cycle;

[0026] determining a PWM off period and a PWM on period according to the frame start signal and the delayed response characteristic data;

[0027] determining a PWM duty cycle and a current signal according to the PWM on period and the display data;

[0028] The light emitting period control signal is determined to be a first level during the PWM off period, and is determined to be a PWM signal according to the PWM duty cycle during the PWM on period.

[0029] Optionally, according to the light-emitting period control signal and the current signal, not generating the driving signal during the PWM off period includes:

[0030] During the PWM off period, the driving signal is not generated according to the light emitting control signal at the first level.

[0031] In the above technical solution, the control chip determines the delay period of the LCD liquid crystal molecules according to the delayed response characteristic data and the frame start signal, and adjusts the signal state of the light-emitting control signal in different time periods based on the delay period. By setting it to the first level during the PWM off period including the LCD delay period, and setting the period when the LCD liquid crystal molecules can display normally as the PWM on period, the light-emitting state of the backlight source is controlled to accurately avoid the LCD delay period, thereby improving the motion blur phenomenon of the liquid crystal display device.

[0032] Optionally, obtaining delay response characteristic data of each frame driving cycle includes:

[0033] When the frame refresh rate of the display device is fixed, delayed response characteristic data of a preset driving cycle is obtained.

[0034] Optionally, obtaining delay response characteristic data of each frame driving cycle includes:

[0035] When the frame refresh rate of the display device is variable, obtaining the frame refresh rate;

[0036] Obtaining delay response characteristic data corresponding to the frame refresh rate in a delay time mapping table;

[0037] The delay time mapping table stores a mapping relationship between the frame refresh rate and the delay response characteristic data.

[0038] In the above technical solution, when the refresh rate of the LCD display is variable, the control chip determines the corresponding delayed response characteristic data according to the refresh rate to determine the delay period of the corresponding LCD liquid crystal molecules, thereby determining the PWM off period within each frame display cycle, thereby ensuring the effect of improving the motion blur phenomenon of the liquid crystal display device.

[0039] Optionally, obtaining the frame refresh rate includes:

[0040] Obtain the frame refresh rate from the main controller;

[0041] The frame refresh rate is a frame refresh rate determined by the main controller according to the display data.

[0042] Optionally, obtaining the frame refresh rate includes:

[0043] Obtaining a frame start signal for each frame of display data;

[0044] The refresh rate is determined according to the frame start signal.

[0045] Optionally, before obtaining the delay response characteristic data of each frame driving period, the method further includes:

[0046] Obtaining a delay duration of the LCD liquid crystal molecules at a preset frame refresh rate;

[0047] Delay response characteristic data corresponding to the preset frame refresh rate is determined according to the delay duration.

[0048] In a second aspect, an embodiment of the present application provides a display device, including:

[0049] An LCD display screen, a control chip, and a backlight circuit, wherein the backlight circuit includes a plurality of backlight light sources, and the LCD display screen includes a plurality of LCD liquid crystal molecules;

[0050] The control chip is electrically connected to the backlight circuit;

[0051] The control chip obtains the delayed response characteristic data and display data of each frame driving cycle;

[0052] In each frame driving cycle, the control chip generates a light-emitting period control signal and a current signal according to the delayed response characteristic data and the display data;

[0053] The control chip does not generate a driving signal during a delay period of the LCD liquid crystal molecules in a frame driving cycle, and generates a driving signal during a PWM on period according to the light emitting period control signal and the current signal;

[0054] The backlight source emits light according to the driving signal;

[0055] The frame driving period sequentially includes a delay period of the LCD liquid crystal molecules and a PWM on period, and a start time of the PWM on period is greater than or equal to an end time of the delay period of the LCD liquid crystal molecules.

[0056] In the above technical solution, the control chip generates a light-emitting period control signal and a current signal according to the delayed response characteristic data of the LCD liquid crystal molecules, so that during the delay period of the LCD liquid crystal molecules at the beginning of each frame driving cycle when the state of the LCD liquid crystal molecules has not yet been completely transformed, no driving signal is generated, and the backlight light source does not emit light. After the delay period of the LCD liquid crystal molecules, during the PWM on period when the state of the LCD liquid crystal molecules has been completely transformed, a driving signal is generated, and the backlight light source provides backlight. Since the user cannot see the blurred picture during the LCD delay period, the motion blur phenomenon of the liquid crystal display device is improved.

[0057] In a third aspect, an embodiment of the present application provides a display, comprising: the display device and a main controller involved in the first aspect;

[0058] The main controller is electrically connected to the control chip of the display device. The main controller is electrically connected to the control chip of the display device.

[0059] In the data processing method, display device, and display provided in the embodiments of the present application, a control chip obtains delayed response characteristic data and display data of each frame drive cycle, generates a light-emitting period control signal and a current signal according to the delayed response characteristic data and the display data in each frame drive cycle, and does not generate a drive signal in the delay period of the LCD liquid crystal molecules in the frame drive cycle according to the light-emitting period control signal and the current signal, but generates a drive signal in the PWM on period to drive the backlight light source to emit light. Since the start time of the PWM on period is greater than or equal to the end time of the delay period of the LCD liquid crystal molecules, the user cannot see the blurred image in the delay period of the LCD liquid crystal molecules, thereby improving the motion blur phenomenon of the liquid crystal display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0061] FIG1 is a schematic diagram of an imaging structure of a liquid crystal display device;

[0062] FIG2 is a circuit structure diagram of a display according to an exemplary embodiment of the present application;

[0063] FIG3 is a circuit structure diagram of a display unit provided according to an exemplary embodiment of the present application;

[0064] FIG4 is a comparison diagram of the response periods of LCD liquid crystal molecules and LEDs in a single frame according to an exemplary embodiment of the present application;

[0065] FIG5 is a comparison diagram of response periods of LCD liquid crystal molecules and LEDs in multiple frames according to an exemplary embodiment of the present application;

[0066] FIG6 is a flow chart of a data processing method provided by the present application according to an exemplary embodiment;

[0067] FIG7 is a flow chart of a method for generating a light-emitting period control signal and a current signal according to an exemplary embodiment of the present application;

[0068] FIG8 is a comparison diagram of the response periods of LCD liquid crystal molecules and light sources in a single frame according to another exemplary embodiment of the present application;

[0069] FIG9 is a comparison diagram of response periods of LCD liquid crystal molecules and light sources in multiple frames according to another exemplary embodiment of the present application;

[0070] FIG10 is a schematic diagram of a process of directly obtaining a frame refresh rate through a control chip according to an exemplary embodiment of the present application;

[0071] FIG11 is a schematic diagram of a process in which a control chip indirectly obtains a frame refresh rate according to an exemplary embodiment of the present application.

[0072] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0073] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0074] It should be noted that, in this document, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0075] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0076] The display system is composed of an imaging system and a display driving system. The display driving system includes a backlight driving system and a liquid crystal display driving system. The imaging system includes a backlight circuit board 10 and a liquid crystal display panel 20. The positional relationship between the backlight circuit board 10 and the liquid crystal display panel 20 is shown in Figure 1.

[0077] In Figure 1, the backlight circuit board 10 is composed of multiple light-emitting units 101, and the liquid crystal display panel 20 is composed of multiple liquid crystal display units. The light-emitting units 101 and the liquid crystal display units are in a corresponding relationship, and the light-emitting units 101 are located on the rear side of the liquid crystal display unit to provide backlight for the liquid crystal display unit.

[0078] The LCD driver system drives the LCD panel 20 to display images. It adjusts the state of its internal imaging structure based on the display data it receives, and displays images when backlight is available. The display data is obtained from the display's main control system.

[0079] The backlight control system is a driving system that drives the backlight circuit board 10 to emit background light corresponding to the display screen. It determines the backlight brightness signal based on the display data, and outputs a corresponding driving control signal to the backlight circuit board 10 based on the backlight brightness signal, so that the backlight unit on the backlight circuit board 10 emits corresponding light intensity according to the driving control signal.

[0080] The specific circuit structure of the backlight system is explained in detail below.

[0081] FIG2 is a circuit diagram of a display according to an exemplary embodiment of the present application. As shown in FIG2 , the display includes a control system, a backlight circuit board 10, and an LCD display screen 40. The control system is electrically connected to the backlight circuit board 10, and the control system is electrically connected to the LCD display screen 40. The control system generates a drive control signal and transmits it to the backlight circuit board 10; the control system generates an LCD drive signal and transmits it to the LCD display screen 40.

[0082] In one embodiment, the control system and the backlight circuit board 10 are electrically connected via a connecting structure. Specifically, the control system is electrically connected to a first end of the connecting structure, and the backlight circuit board 10 is electrically connected to a second end of the connecting structure. The connecting structure includes a flexible flat cable (FFC), a flexible printed circuit (FPC), or a connector. The control system transmits drive control signals to the backlight circuit board 10 via the connecting structure.

[0083] The control system includes a main controller 30 and at least one dimming controller 20 . The main controller 30 is electrically connected to each dimming controller 20 and is used to transmit a backlight control signal to the dimming controller 20 .

[0084] In one embodiment, each dimming controller 20 is provided on a corresponding control board, and the main controller 30 is electrically connected to the dimming controller 20 via a circuit structure between the main controller 30 and the control board and a connection line provided on the control board. The dimming controller 20 is electrically connected to the backlight circuit board 10 via a connection structure.

[0085] In another embodiment, each dimming controller 20 is disposed on the backlight circuit board 10. In one embodiment, the dimming controller 20 is disposed longitudinally at an edge of the backlight circuit board; in another embodiment, the dimming controller 20 is disposed transversely at an edge of the backlight circuit board, without specific limitation. The main controller 30 is electrically connected to each dimming controller 20 via a connection structure and a connection line provided on the backlight circuit board. Each dimming controller 20 is electrically connected to the corresponding backlight unit 101 via a connection line on the backlight circuit board.

[0086] The backlight circuit board can be divided into at least one backlight display area, each of which corresponds to a control board. The main controller 20 splits the backlight brightness signal according to each backlight display area to obtain multiple backlight brightness sub-signals, and transmits the backlight brightness sub-signals to the corresponding dimming controller 20.

[0087] The dimming controller 20 generates a corresponding driving control signal according to the obtained backlight brightness sub-signal, and transmits the driving control signal to the corresponding backlight unit 101 .

[0088] The backlight unit 101 emits light according to the obtained driving control signal.

[0089] 3 , the circuit structure of the backlight unit 101 includes a backlight driver chip 1011 and at least one backlight light source 1012. In one backlight unit 101, the backlight driver 1011 and each backlight light source 1012 are electrically connected.

[0090] The backlight driver chip 1011 is electrically connected to the control board 20 via the connection structure 40, and is used to obtain the driving control signal transmitted by the control board 20 and generate a corresponding driving signal according to the driving control signal. In one embodiment, the backlight driver 1011 is a dimmer.

[0091] Each backlight source 1012 is used to receive a driving signal and emit light in response to the driving signal. The driving signal includes a pulse width modulation (PWM) signal and a driving current signal. PWM is used to control the duty cycle of the light-emitting block within a frame of the light-emitting cycle, while the driving current is used to control the instantaneous brightness of the light-emitting block.

[0092] Backlight source 1012 includes multiple LEDs. In one embodiment, the LEDs are electrically connected in parallel. In backlight source 1012, each LED receives the same drive signal, and the average luminance generated by the drive signal during a frame of light emission is the same. The LEDs include, but are not limited to, organic light-emitting diodes (OLEDs), Mini LEDs, Micro LEDs, and Micro-OLEDs.

[0093] The main controller 30 is electrically connected to the LCD display 40 and is used to generate an LCD drive signal based on the display data and transmit the LCD drive signal to the LCD display 40. The liquid crystal molecules in the LCD display 40 adjust their motion according to the LCD drive signal and display the image when the backlight passes through.

[0094] At the beginning of each frame, the liquid crystal molecules in the LCD display 40 immediately adjust their motion after receiving the LCD drive signal. Correspondingly, the backlight circuit also adjusts its illumination state immediately after receiving the backlight data at the beginning of each frame. Once the LCD liquid crystal molecules have adjusted their motion, they can accurately display the image corresponding to the display data. Once the LEDs have adjusted their illumination state, they can provide accurate backlight brightness. Only when both are operating normally can the user see an accurate display image.

[0095] Since the response time of LEDs is in the microsecond range and the response time of LCD liquid crystal molecules is in the millisecond range, the response states of the LCD liquid crystal molecules and LEDs after receiving the corresponding data or signals are shown in Figure 4. In Figure 4, the shaded area is the area where the LED displays normally, and the curve is the on-state change curve of the LCD liquid crystal molecules. At time point t0, the controller 30 receives the frame start signal and transmits the corresponding signal to the LCD liquid crystal molecules and the backlight driver. The LED can respond immediately, and the LCD liquid crystal molecules can only display normally when their state changes to a stable state or a state that changes to 90%. The time point when the LCD liquid crystal molecules display normally is t1. During the period from t1 to t2, the display device can display the picture normally. During the period from t0 to t1, the LED can display the backlight normally, but the LCD liquid crystal molecules cannot display the picture normally. The user will observe that the picture is unclear at certain moments.

[0096] When the display device displays an image containing a scene with rapidly moving objects, a comparison of the LCD and LED response periods is shown in FIG5 . The state of the LCD liquid crystal molecules changes significantly between adjacent frames. Specifically, at time t2, the LCD liquid crystal molecules receive the LCD drive signal for frame Fn. The period t2 to t4 is the transition period from the display device normally displaying frame Fn-1 to the display device normally displaying frame Fn. During the period t2 to t3, the LCD is still displaying frame Fn-1. During the period t3 to t4, the LCD begins displaying frame Fn. During the period t2 to t4, the backlight circuit board 10 can normally provide backlight. This results in the previous frame overlapping with the current frame during the period t2 to t3, and the current frame not being clearly displayed during the period t3 to t4. The display device also experiences the same situation in the next frame. Consequently, users may observe motion blur when viewing multiple frames of images containing rapidly moving objects displayed by the LCD device.

[0097] Therefore, how to improve the motion blur phenomenon of liquid crystal display devices has become a research focus.

[0098] To address the aforementioned issues, the present application provides a data processing method and display device for resolving the technical problem of motion blur in liquid crystal display devices. The technical concept of the present application is as follows: a control chip determines the power supply period of a backlight circuit board based on the delay period of the LCD liquid crystal molecules. During the delay period, the backlight circuit board is prevented from providing backlight, and backlight is only provided after the LCD liquid crystal molecules are normally displaying the image. This prevents the user from seeing the blurred image during the LCD delay period, thereby improving the motion blur phenomenon of the LCD display device.

[0099] FIG6 is a flow chart of a data processing method provided by the present application according to an exemplary embodiment. As shown in FIG6 , the data processing method includes:

[0100] S101 : The control chip obtains delay response characteristic data and display data of each frame driving period.

[0101] The control chip is a chip that controls the backlight source in the display device.

[0102] The delayed response characteristic data is data stored locally before the control chip is driven and is used to represent the delay of LCD liquid crystal molecules.

[0103] The process of controlling the chip to store the delayed response characteristic data includes:

[0104] The LCD delay time of the LCD liquid crystal molecules is obtained by measurement, and the delay response characteristic data is stored locally according to the LCD delay time.

[0105] The delayed response characteristic data may be stored in a modifiable register inside the control chip, or may be stored in a register electrically connected to the control chip.

[0106] In one embodiment, the control chip may store the delay response characteristic data in the form of a LUT (Look Up Table).

[0107] In one embodiment, the delayed response characteristic data includes a PWM off time length and / or a PWM on time length.

[0108] S102 : In each frame driving cycle, the control chip generates a light-emitting period control signal and a current signal according to the delayed response characteristic data and the display data.

[0109] The light-emitting period control signal is used to control the period of time during which the backlight source emits light. During this period, the control chip generates a driving signal, and the backlight source emits light only when it receives the driving signal.

[0110] The current signal is used to control the brightness of the backlight source within a unit time period.

[0111] The backlight source determines the average luminance within a frame display period based on the luminance duration and luminance. The brightness of the display image observed by the user is determined by the average luminance.

[0112] The control chip determines the light-emitting period of the backlight light source and its ratio to a frame display cycle based on the delayed response characteristic data. Then, based on the target light-emitting brightness of the backlight light source and the size of the driving tube that drives the backlight light source, it determines the duty cycle of the PWM signal and the current signal obtained during the light-emitting period of the backlight light source, thereby generating a light-emitting period control signal and a current signal to drive the backlight light source to emit light.

[0113] S103 , the control chip does not generate a driving signal during the delay period of the LCD liquid crystal molecules in the frame driving cycle according to the light emitting period control signal and the current signal, and generates a driving signal during the PWM on period to drive the backlight light source to emit light.

[0114] The frame drive cycle sequentially includes a delay period for the LCD liquid crystal molecules and a PWM on period, with the start time of the PWM on period being greater than or equal to the end time of the delay period for the LCD liquid crystal molecules. That is, the period during which the backlight source emits light in accordance with the drive signal generated by the light emission control signal and the current signal is all or part of the period following the delay period for the LCD liquid crystal molecules within the frame drive cycle.

[0115] More specifically, the control chip determines the PWM off period according to the light-emitting period control signal, and does not generate a driving signal during the PWM off period.

[0116] Among them, the start time of the PWM off period is the same as the start time of the delay period of the LCD liquid crystal molecules, the end time of the PWM off period is greater than or equal to the end time of the delay period of the LCD liquid crystal molecules, and the start time of the PWM on period is equal to the end time of the PWM off period.

[0117] The control chip determines the PWM on period according to the light-emitting period control signal. During the PWM on period, the control chip generates a driving signal according to the PWM signal and current signal in the light-emitting period control signal to drive the backlight light source to emit light.

[0118] The following explains the response of LCD liquid crystal molecules and backlight light sources.

[0119] Figures 8 and 9 are comparison diagrams of the response time periods of LCD liquid crystal molecules and light sources. Figure 8 shows the response of LCD liquid crystal molecules and backlight light source when displaying a single frame of display data, and Figure 9 shows the response of LCD liquid crystal molecules and backlight light source when displaying continuous multiple frames of display data.

[0120] In Figure 8, the LCD liquid crystal molecules adjust the open state to 90% at time t1, and the delay period of the LCD liquid crystal molecules is t0~t1. The control chip can determine any time between t1 and t2 (including t1 and excluding t2) as the end time of the PWM closed period and the start time of the PWM open period.

[0121] In the embodiment shown in FIG8 , t1 is determined as the end time of the PWM off period, and t0 to t1 is the PWM off period, during which the control chip does not generate a PWM signal, and the backlight source does not emit light; t1 to t2 is the PWM on period, during which the control chip generates a PWM signal, and the backlight source emits light. Since the on state of the LCD liquid crystal molecules can normally display the display data during this period, the images seen by the user in one frame display cycle are all correctly displayed images.

[0122] In Figure 9, the display of frame Fn-1 is identical to that shown in Figure 8 and will not be further described here. In frames Fn and Fn-1, after receiving the frame start signal, the transition period (t2 to t4, or t5 to t7) between the display of the previous frame and the current frame is determined as a PWM off period. The control chip generates a PWM signal, and the backlight source does not emit light. During the remaining period, the LCD liquid crystal molecules are turned on to display data normally. The remaining period (t4 to t5, or t7 to t8) is determined as a PWM on period, and the backlight source provides backlight, displaying a clear and accurate image through the LCD liquid crystal molecules.

[0123] In one embodiment, the control chip includes a dimming controller and a backlight controller, and the dimming controller and the backlight controller are electrically connected. When the display device is displaying, the dimming controller obtains the delayed response characteristic data and display data of each frame driving cycle, and generates a light-emitting period control signal and a current signal based on the delayed response characteristic data and the display data, and transmits the light-emitting period control signal and the current signal to the backlight controller. The backlight controller does not generate a driving signal within the delay period of the LCD liquid crystal molecules based on the light-emitting period control signal and the current signal, and generates a driving signal using the PWM signal and the current signal within the PWM on period. When the driving signal is output, the backlight light source emits light.

[0124] In the above technical solution, the control chip generates a light-emitting period control signal and a current signal according to the delayed response characteristic data of the LCD liquid crystal molecules, so that during the delay period of the LCD liquid crystal molecules at the beginning of each frame driving cycle when the state of the LCD liquid crystal molecules has not yet been completely transformed, no driving signal is generated, and the backlight light source does not emit light. After the delay period of the LCD liquid crystal molecules, during the PWM on period when the state of the LCD liquid crystal molecules has been completely transformed, a driving signal is generated, and the backlight light source provides backlight. Since the user cannot see the blurred picture during the LCD delay period, the motion blur phenomenon of the liquid crystal display device is improved.

[0125] The generation process of the light emitting period control signal and the current signal is explained below.

[0126] FIG7 is a flow chart of a method for generating a light-emitting period control signal and a current signal according to an exemplary embodiment of the present application. As shown in FIG7 , the method includes:

[0127] S201 : The control chip obtains a frame start signal of each frame driving cycle.

[0128] In one embodiment, the frame start signal is a Vsync signal.

[0129] The control chip can determine the frame driving period of the current frame according to the frame start signal of the current frame and the frame start signal of the next frame.

[0130] S202 : The control chip determines a PWM off period and a PWM on period according to the frame start signal and the delayed response characteristic data.

[0131] The control chip obtains the PWM off duration or the PWM on duration from the delayed response characteristic data, and can determine the PWM off period and the PWM on period according to the above duration and the time corresponding to the frame start signal.

[0132] More specifically, if the delayed response characteristic data includes the PWM off time, the sum of the PWM off time and the time corresponding to the frame start signal is determined as the start time of generating the PWM signal in the frame drive period.

[0133] If the delayed response characteristic data includes the PWM on duration, the start time of generating the PWM signal in the frame drive period is determined as the time corresponding to the frame start signal of the next frame minus the PWM on duration.

[0134] The control chip determines the PWM off period according to the time corresponding to the frame drive signal of the current frame and the on time of the PWM signal of the current frame; and determines the PWM on period according to the on time of the PWM signal of the current frame and the time corresponding to the frame start signal of the next frame.

[0135] S203 : The control chip determines the PWM duty cycle and the current signal according to the PWM on period and the display data.

[0136] The control chip determines the lighting duration and current signal of the backlight light source according to the target brightness of the current frame display data when driving the backlight light source.

[0137] The PWM duty cycle within the period is determined according to the lighting duration of the backlight source and the PWM on period.

[0138] S204 , the control chip determines the light-emitting period control signal to be a first level during the PWM off period, and determines it to be a PWM signal according to the PWM duty cycle during the PWM on period.

[0139] During the PWM off period, the control chip does not generate a driving signal according to the light emitting control signal at the first level, and the backlight source does not emit light.

[0140] During the PWM on period, the light-emitting period control signal generated by the control chip is a PWM signal, and the backlight source emits light according to the PWM signal.

[0141] In the above technical solution, the control chip determines the delay period of the LCD liquid crystal molecules according to the delayed response characteristic data and the frame start signal, and adjusts the signal state of the light-emitting control signal in different time periods based on the delay period. By setting it to the first level during the PWM off period including the LCD delay period, and setting the period when the LCD liquid crystal molecules can display normally as the PWM on period, the light-emitting state of the backlight source is controlled to accurately avoid the LCD delay period, thereby improving the motion blur phenomenon of the liquid crystal display device.

[0142] As users' requirements for display quality increase, the refresh rate of the display can be changed to match the frame rate of the displayed data, so that when the user is watching images or videos with slowly changing display content, the refresh rate of the display device is adaptively reduced; when the user is watching images or data with rapidly changing display content (for example, a game interface with rapidly changing screens), the refresh rate of the display device is adaptively increased.

[0143] The refresh rate of the display device is different, and the delayed response characteristic data is different, so the delay period of the LCD liquid crystal molecules is also different.

[0144] Based on this, in the above embodiment, there are multiple situations in which the control chip obtains the delayed response characteristic data of each frame driving period: the situation in which the refresh rate of the display is variable and the situation in which the refresh rate of the display is constant.

[0145] When the refresh rate of the display remains unchanged, the user sets corresponding delayed response characteristic data in the control chip based on the refresh rate of the display, and the delayed response characteristic data remains unchanged. When the control chip obtains the delayed response characteristic data, it obtains the delayed response characteristic data of the preset drive cycle. In one embodiment, the delayed response characteristic data is obtained locally from the control chip, which is not specifically limited in this application.

[0146] When the refresh rate of the display changes, the control chip needs to obtain the frame refresh rate, query the frame refresh rate in the delay time mapping table, and obtain the delay response characteristic data corresponding to the frame refresh rate. Among them, the delay time mapping table is a table that stores the mapping relationship between the frame refresh rate and the delay response characteristic data. The delay response characteristic data in the delay time mapping table is the delay response characteristic data corresponding to the preset frame refresh rate determined by the control chip based on the delay time after the user measures the delay time of the LCD liquid crystal molecules at the preset frame refresh rate. For example: the control chip determines the sum of the delay time and the preset difference as the PWM off time in the delay response characteristic data.

[0147] There are two ways for the control chip to obtain the frame refresh rate: direct acquisition and indirect acquisition. The following explains the two acquisition methods respectively.

[0148] When the frame refresh rate is obtained directly, the control chip obtains the refresh rate directly from the main controller, queries the delay time corresponding to multiple refresh frequencies stored locally according to the refresh rate, obtains the delay time corresponding to the refresh rate, and generates a light-emitting period control signal and a current signal according to the delay time, and uses the light-emitting period control signal and the current signal to drive the backlight light source to emit light.

[0149] Among them, the control chip queries the stored multiple delay times according to the refresh rate. The process of obtaining the delay time corresponding to the refresh rate can be implemented by an internally compiled multiplexer program or by a specific multiplexer device, which is not specifically limited here.

[0150] The main controller can determine the refresh rate by analyzing the display data.

[0151] In one embodiment, the control chip includes a dimming controller and a backlight controller. FIG10 is a schematic diagram of a process in which the control chip directly obtains a frame refresh rate.

[0152] As shown in the figure, the dimming controller 20 stores delay times corresponding to multiple refresh frequencies. The dimming controller 20 directly obtains the refresh rate from the main controller 30, queries the stored multiple delay times according to the refresh rate, obtains the delay time corresponding to the refresh rate, and generates a light-emitting period control signal and a current signal according to the delay time. The dimming controller 20 transmits the light-emitting period control signal and the current signal to the backlight controller 1011. The backlight controller 1011 generates a driving signal according to the obtained signal, and transmits the driving signal to the corresponding backlight light source. The backlight light source emits light according to the driving signal.

[0153] When the frame refresh rate is obtained indirectly, the control chip obtains the frame start signal from the main controller, uses the refresh rate analysis unit in the control chip to analyze the frame start signal, determines the refresh rate of the target frame, and thereby determines the corresponding delay time. The process of determining the delay time is the same as that of the embodiment of directly obtaining the frame refresh rate, and will not be repeated here.

[0154] Among them, the frame start signal obtained by the control chip includes multiple frame start signals, which at least include the time point of the start signal of the target frame and the time point of the start signal of the next frame of the target frame. In one embodiment, the frame start signal of the target frame is determined based on the time difference between the two time points.

[0155] In one embodiment, the control chip includes a dimming controller and a backlight controller. FIG11 is a schematic diagram of a process in which the control chip indirectly obtains a frame refresh rate.

[0156] As shown in the figure, the dimming controller 20 obtains a frame start signal from the main controller 10. The dimming controller 20 includes a refresh rate analysis unit. The refresh rate analysis unit is used to process the frame start signal to obtain the frame refresh rate. The process of the dimming controller 20 using the frame refresh rate to drive the backlight light source to emit light has been explained in the embodiment shown in Figure 10 and will not be repeated here.

[0157] In the above technical solution, when the refresh rate of the LCD display is variable, the control chip determines the corresponding delayed response characteristic data according to the refresh rate to determine the corresponding LCD delay period, thereby determining the PWM off period within each frame display cycle, thereby ensuring the effect of improving the motion blur phenomenon of the liquid crystal display device.

[0158] The present application also provides a display device, comprising: an LCD display screen, a control chip and a backlight circuit, the backlight circuit comprising multiple backlight light sources, the LCD display screen comprising multiple LCD liquid crystal molecules, and the control chip and the backlight circuit being electrically connected.

[0159] The process of the control chip controlling the backlight circuit board to emit light has been explained in the above embodiment and will not be repeated here.

[0160] The present application also provides a display, comprising: a display device and a main controller, wherein the main controller is electrically connected to a control chip of the display device, and the main controller is electrically connected to a control chip of the display device.

[0161] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0162] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A data processing method, characterized in that: The method is applied to a control chip, and the method comprises: Obtaining delay response characteristic data and display data of each frame driving cycle; In each frame driving cycle, generating a light-emitting period control signal and a current signal according to the delayed response characteristic data and the display data; According to the light-emitting period control signal and the current signal, no driving signal is generated during the delay period of the LCD liquid crystal molecules in the frame driving cycle; a driving signal is generated during the PWM on period to drive the backlight source to emit light; The frame driving period includes a delay period of the LCD liquid crystal molecules and a PWM on period in sequence, and a start time of the PWM on period is greater than or equal to an end time of the delay period of the LCD liquid crystal molecules.

2. The method according to claim 1, characterized in that According to the light emitting period control signal and the current signal, no driving signal is generated in a delay period of LCD liquid crystal molecules in a frame driving period, including: Determining a PWM off period according to the light emitting period control signal; During the PWM off period, the driving signal is not generated; The start time of the PWM off period is the same as the start time of the delay period of the LCD liquid crystal molecules, and the end time of the PWM off period is greater than or equal to the end time of the delay period of the LCD liquid crystal molecules; The start time of the PWM on period is equal to the end time of the PWM off period.

3. The method according to claim 2, characterized in that According to the light-emitting period control signal and the current signal, a driving signal is generated in a PWM on period to drive the backlight source to emit light, including: Determine a PWM on period according to the light-emitting period control signal; the light-emitting period control signal includes a PWM signal; In the PWM on period, a driving signal is generated according to the PWM signal and the current signal to drive the backlight source to emit light.

4. The method according to claim 2 or 3, characterized in that: The delayed response characteristic data includes PWM off time length and / or PWM on time length; In each frame driving cycle, generating a light-emitting period control signal and a current signal according to the delayed response characteristic data and the display data, including: Obtaining a frame start signal for each frame driving cycle; Determine a PWM off period and a PWM on period according to the frame start signal and the delayed response characteristic data; Determine a PWM duty cycle and a current signal according to the PWM on period and the display data; The light emission period control signal is determined as a first level in the PWM off period, and is determined as a PWM signal according to the PWM duty cycle in the PWM on period.

5. The method according to claim 4, characterized in that In the PWM off period, not generating the driving signal, including: During the PWM off period, the driving signal is not generated according to the light emitting control signal at the first level.

6. The method according to any one of claims 1 to 3, characterized in that Obtain the delay response characteristic data of each frame drive cycle, including: When the frame refresh rate of the display device is fixed, delayed response characteristic data of a preset driving cycle is obtained.

7. The method according to any one of claims 1 to 3, characterized in that Obtain the delay response characteristic data of each frame drive cycle, including: When the frame refresh rate of the display device is variable, obtaining the frame refresh rate; Obtaining delay response characteristic data corresponding to the frame refresh rate in a delay time mapping table; The delay time mapping table stores a mapping relationship between the frame refresh rate and the delay response characteristic data.

8. The method according to claim 7, characterized in that The obtaining of the frame refresh rate comprises: Obtain the frame refresh rate from the main controller; The frame refresh rate is a frame refresh rate determined by the main controller according to the display data.

9. The method according to claim 7, characterized in that: The obtaining of the frame refresh rate comprises: Obtaining a frame start signal for each frame of display data; The refresh rate is determined according to the frame start signal.

10. The method according to any one of claims 1, characterized in that Before obtaining the delay response characteristic data of each frame driving cycle, it also includes: Obtaining the delay duration of the LCD liquid crystal molecules at a preset frame refresh rate; Delay response characteristic data corresponding to the preset frame refresh rate is determined according to the delay duration.

11. A display device, characterized in that: include: An LCD display screen, a control chip and a backlight circuit, wherein the backlight circuit includes a plurality of backlight light sources, and the LCD display screen includes a plurality of LCD liquid crystal molecules; The control chip is electrically connected to the backlight circuit; The control chip obtains the delayed response characteristic data and display data of each frame driving cycle; In each frame driving cycle, the control chip generates a light-emitting period control signal and a current signal according to the delayed response characteristic data and the display data; The control chip does not generate a driving signal in a delay period of LCD liquid crystal molecules in a frame driving cycle according to the light-emitting period control signal and the current signal, and generates a driving signal in a PWM on period; The backlight source emits light according to the driving signal; The frame driving period includes a delay period of the LCD liquid crystal molecules and a PWM on period in sequence, and a start time of the PWM on period is greater than or equal to an end time of the delay period of the LCD liquid crystal molecules.

12. A display, characterized in that: include: The display device and the main controller as claimed in claim 9; The main controller is electrically connected to the control chip of the display device, and the main controller is electrically connected to the control chip of the display device.

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