CN108648706B - Liquid crystal display, method, apparatus and medium for controlling the same - Google Patents
Liquid crystal display, method, apparatus and medium for controlling the same Download PDFInfo
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- CN108648706B CN108648706B CN201810386318.6A CN201810386318A CN108648706B CN 108648706 B CN108648706 B CN 108648706B CN 201810386318 A CN201810386318 A CN 201810386318A CN 108648706 B CN108648706 B CN 108648706B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
Abstract
The present application provides a liquid crystal display, a method, an apparatus and a medium for controlling the same, wherein the liquid crystal display includes: the liquid crystal display panel is used for controlling the on-off of corresponding pixels according to grid scanning signals output by scanning lines and controlling the display content of the corresponding pixels according to display signals transmitted by signal lines; the backlight source is used for emitting light rays and irradiating the light rays to the liquid crystal display panel; a driving circuit for outputting a gate scanning signal to the scanning line and outputting a display signal to the signal line; and the backlight control circuit is used for controlling the corresponding backlight source to be started after the driving circuit outputs the grid scanning signal and aiming at the pixels started under the control of the grid scanning signal, and delaying the preset duration. Therefore, when the pixels are started by the grid scanning signals, the backlight source of the corresponding pixels is controlled to be started in a delayed mode through the backlight control circuit, and therefore the situation that a user sees a defective picture on a display within a grid scanning signal period is avoided.
Description
Technical Field
The present application relates to the field of mobile terminal technologies, and in particular, to a liquid crystal display, and a method, an apparatus, and a medium for controlling the same.
Background
With the development of the manufacturing technology of the mobile terminal, the display performance of the liquid crystal display of the mobile terminal is also gradually improved, taking the TFT liquid crystal display as an example, first, a gate driver (gate driver) of the display scans the transistors row by row through a gate terminal of the thin film transistor, and then the thin film transistor is turned ON (ON), and drives each liquid crystal pixel point ON the liquid crystal display panel, so as to realize the display information of the display with high speed, high brightness and high contrast.
However, in the period of performing the gate scanning on the liquid crystal display, the pixels on the liquid crystal display panel are turned on under the control of the gate scanning signal, and meanwhile, since the backlight of the display is always turned on when the liquid crystal display is in operation, the backlight illuminates the pixels on which the gate scanning signal is turned on, and the deflection voltage of the liquid crystal molecules changes in the period of the gate scanning signal, the turned-on pixels may display an incorrect gray scale, so that a user may see the defective picture displayed by the turned-on pixels on the display panel, thereby reducing the display effect of the display.
Content of application
The present application is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present application is to provide a liquid crystal display, in which a backlight control circuit controls on/off of a backlight of a corresponding pixel, when a gate scan signal turns on a pixel, the backlight control circuit controls the backlight of the turned-on pixel to be turned on in a delayed manner, and after a gate scan signal period ends, the backlight is turned on, so that the turned-on pixel in the gate scan signal period cannot display an image on a liquid crystal display panel, and a user is prevented from seeing a defective image on the display panel in the gate scan signal period.
A second objective of the present application is to provide a method for controlling a liquid crystal display.
A third object of the present application is to provide a computer apparatus.
A fourth object of the present application is to provide a computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present application proposes a liquid crystal display, including: the liquid crystal display panel is used for controlling the on-off of corresponding pixels according to grid scanning signals output by scanning lines and controlling the display content of the corresponding pixels according to display signals transmitted by signal lines; the backlight source is used for emitting light rays and irradiating the light rays to the liquid crystal display panel; a driving circuit for outputting a gate scanning signal to the scanning line and outputting a display signal to the signal line; and the backlight control circuit is used for controlling the corresponding backlight source to be started after the driving circuit outputs the grid scanning signal and aiming at the pixels started under the control of the grid scanning signal, and delaying the preset duration.
The liquid crystal display of the embodiment of the application controls the on-off of the backlight of the corresponding pixel through the backlight control circuit, when the pixel is started through the grid scanning signal, the backlight source of the started pixel is controlled to be started in a delayed mode through the backlight control circuit, and the backlight source is started after the grid scanning signal time period is ended, so that the pixel started in the grid scanning signal time period cannot display an image on the liquid crystal display panel, and the situation that a user sees a defective picture on the display panel in the grid scanning signal time period is avoided.
In order to achieve the above object, an embodiment of a second aspect of the present application provides a method for controlling a liquid crystal display, including the following steps: acquiring a gate scanning signal output by a driving circuit, wherein the gate scanning signal controls the on-off of a corresponding pixel in a liquid crystal display panel; and when the grid scanning signal is acquired, controlling the corresponding backlight source to be started in a delayed preset time period aiming at the pixel started under the control of the grid scanning signal.
According to the control method of the liquid crystal display, the backlight control circuit controls the on-off of the backlight of the corresponding pixel, when the pixel is started by the grid scanning signal, the backlight source of the started pixel is controlled to be started in a delayed mode through the backlight control circuit, and the backlight source is started after the grid scanning signal time period is finished, so that the pixel started in the grid scanning signal time period cannot display an image on the liquid crystal display panel, and the situation that a user sees a defective image on the display panel in the grid scanning signal time period is avoided.
In order to achieve the above object, an embodiment of a third aspect of the present application provides a computer device, including: the liquid crystal display device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the liquid crystal display device is realized.
In order to achieve the above object, a fourth aspect of the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for controlling a liquid crystal display according to the above embodiment.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a liquid crystal display according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional structure view of a liquid crystal display panel according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a specific lcd provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of another specific LCD provided in the embodiments of the present application; and
fig. 5 is a flowchart illustrating a method for controlling a liquid crystal display according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
A liquid crystal display and a control method of the liquid crystal display of the embodiments of the present application are described below with reference to the drawings.
Fig. 1 is a schematic structural diagram of a liquid crystal display provided in an embodiment of the present application.
As shown in fig. 1, the liquid crystal display includes: a liquid crystal display panel 1, a backlight 2, a drive circuit 3, and a backlight control circuit 4.
The liquid crystal display panel 1 is a display panel that changes the intensity and vector direction of incident light emitted from the backlight 2 by using the photoelectric characteristics such as dielectric coefficient and refractive index of liquid crystal molecules to generate gray scales for displaying, and may be a TFT liquid crystal display panel or a TFD liquid crystal display panel, which is not limited herein.
To more clearly illustrate the display principle of the lcd panel, fig. 2 is a schematic cross-sectional structure diagram of the lcd panel according to the embodiment of the present disclosure. As shown in fig. 2, the liquid crystal display panel 1 includes: a lower polarizing plate 11, a TFT substrate 12, a liquid crystal layer 13, a color filter 14, an upper polarizing plate 15, and a glass substrate 16.
The lower polarizing plate 11 is adjacent to the backlight 2, light emitted from the backlight 2 is transmitted upward through the lower polarizing plate 11, and the upper and lower polarizing plates have barriers, and the barrier angles of the two polarizing plates are perpendicular to each other, so that when liquid crystal molecules in the liquid crystal layer 13 are not deflected, due to the polarization characteristics, the light emitted from the backlight 2 cannot pass through the upper polarizing plate, and no content is displayed on the liquid crystal display panel 1. When the liquid crystal molecules are deflected under the control of the control voltage from the driving circuit 3, the light passes through the liquid crystal molecules after being deflected by the lower polarizer 11, and the polarization direction of the light is deflected by 90 degrees again, so that the light can be displayed as different colors through the upper polarizer 15 and the color filter 14, and further different colors and other contents are displayed on the pixels of the liquid crystal display panel.
In a specific implementation, the control signal is transmitted by using at least one scanning line and at least one signal line included in the liquid crystal display panel 1. One end of the scanning line is connected with a gate terminal (gate) of a transistor in the display panel, the other end of the scanning line is connected with the driving circuit 3, after the scanning line receives a gate scanning signal output by the driving circuit 3, the transistor in the TFT substrate 12 connected with the scanning line is turned on through the gate terminal, and the transistor is used for generating a voltage for controlling the deflection of liquid crystal molecules, so that the deflected liquid crystal molecules and corresponding pixels which are subsequently turned on the display panel are determined. Furthermore, one end of the signal line is connected with a source end (source) of the transistor, the other end of the signal line is connected with the driving circuit 3, when the transistor is turned on by the gate scanning signal, the signal line receives the display signal sent by the driving circuit 3, the specific value of the voltage written in the liquid crystal pixel is controlled by the control voltage in the display signal, the projection rate of the current liquid crystal molecule is determined by utilizing the relation between the voltage of the liquid crystal molecule and the projection rate, and the parameters such as gray scale, brightness and color displayed by the corresponding pixel on the liquid crystal display panel 1 are determined after the light is filtered by the color filter 2.
As is apparent from fig. 2, a liquid crystal layer 13 is sandwiched between two glass substrates 16 to form a parallel plate capacitor (CLC), and a bias voltage written in a liquid crystal molecule by a transistor is held by the CLC. In practical applications, the CLC has a small capacitance value and cannot continuously maintain the deflection voltage, so that the deflection voltage is changed before the control voltage in the display signal charges the liquid crystal molecules, and thus the displayed gray scale may be wrong, and since the backlight 2 of the display is always turned on when the liquid crystal display is in operation, the pixels on the liquid crystal display panel 1 may display wrong gray scale in the period of the gate scan signal before the driving circuit 3 outputs the display signal, thereby forming a defective picture on the liquid crystal display panel 1. Therefore, in order to avoid that the user sees the defective picture displayed on the liquid crystal display panel 1 within the period of the gate scan signal, the embodiment of the present application provides a backlight control circuit 4, and the backlight control circuit 4 can control the turn-on time of the backlight source 2 at different pixels, so as to avoid the liquid crystal display panel 1 from displaying the defective picture.
In concrete implementation, the backlight control circuit 4 is connected with the driving circuit 3 and the backlight source 2, the backlight control circuit 4 acquires a pixel preset to be turned on by a gate scanning signal after detecting that the driving circuit 2 outputs the gate scanning signal, and controls the backlight source corresponding to the pixel to be turned on for a preset delay before the pixel is turned on by the gate scanning signal.
Wherein the preset duration is determined according to the duration of the deflection of the liquid crystal molecules controlled by the gate scanning signal and the delay duration of the display content of the display signal control pixel, as an example, the preset duration may be determined according to the sum of the delay duration of the turn-on of the pixel under the control of the gate scanning signal and the delay duration of the display content of the display signal control pixel, when the backlight control circuit 4 detects the pixel under the control of the gate scanning signal, the backlight source of the corresponding pixel is controlled to be turned on after the delay duration of the gate scanning signal and the delay duration of the display signal, and during the process of turning on the pixel by the gate scanning signal, since the backlight source of the corresponding pixel is not turned on, no light is incident on the liquid crystal molecules deflected under the gate scanning signal, the liquid crystal display panel 1 does not display the content of the corresponding pixel, and after the preset duration is over, the backlight source corresponding to the pixel under the, and displaying according to the content displayed by the control voltage control pixel in the display signal.
Further, when the user turns off the display content of the turned-on pixels no longer needed by the liquid crystal display or the like, the driving circuit 2 outputs the gate scanning signal to control the turned-on pixels to be turned off, and the backlight control circuit 4 is further configured to control the backlight of the corresponding pixels in the backlight source 2 to be turned off when the corresponding pixels are turned off under the control of the gate scanning signal.
Therefore, the liquid crystal display according to the embodiment of the application controls the on-off of the backlight of the corresponding pixel through the backlight control circuit 4, the pixel which is turned on in the gate scanning signal time period cannot display an image on the liquid crystal display panel, and a user is prevented from seeing a picture except an expected content on the display panel in the gate scanning signal time period.
Based on the above embodiments, since the lcd comprises a plurality of rows of transistors in order to improve the display effect of the lcd in practical applications, the lcd panel 1 usually comprises a plurality of scan lines and signal lines. Therefore, the gate scanning signal needs to control the transistors to be turned on row by row, and further controls the on/off of the pixels in the corresponding row on the liquid crystal display panel 1.
After the gate scanning signal controls the transistors in each row to be turned on, in order to prevent the backlight source 2 from emitting the wrong gray scale displayed by the turned-on pixels in each row onto the liquid crystal display panel 1, the backlight control circuit 4 controls the backlight of the turned-on pixels in the corresponding row to be turned on for a preset delay time for each row of pixels of the liquid crystal display panel 1. For example, when the gate scanning signal turns on the transistors downward row by row, each time the gate scanning signal is output, the backlight control circuit 4 obtains the pixels of the preset row turned on by the current gate scanning signal according to the gate scanning signal sent by the driving circuit 2 each time, before the gate scanning signal turns on the pixels of the row, the backlight source corresponding to the pixels is controlled to be turned on with a delay preset duration, and when the delay duration of the gate scanning signal for turning on the pixels and the delay duration of the display signal for controlling the display content of the pixels are passed, the driving circuit 2 outputs the gate scanning signal for controlling the pixels of the next row to be turned on, so that the backlight control circuit 4 controls the backlight source corresponding to the pixels which are turned on to be turned on, and thus, the user is prevented from seeing a defective picture on the display panel within the period of the gate scanning signal. Further, when the pixels in the corresponding row are turned off under the control of the gate scanning signal, the backlight control circuit 4 controls the backlight of the pixels in the corresponding row to be turned off.
Based on the above embodiments, in order to more clearly describe the process of the backlight control circuit controlling the on/off of the backlight source, two methods of the backlight control circuit controlling the on/off of the backlight source are described below.
Fig. 3 is a schematic structural diagram of a specific liquid crystal display provided in an embodiment of the present application, and as shown in fig. 3, on the basis of the liquid crystal display shown in fig. 1, the backlight control circuit 4 includes: a processor 41 and a backlight power supply chip 42.
The processor (CPU)41 is electrically connected to the driving circuit 2 and the backlight power chip 42, and is configured to output a backlight signal to the backlight power chip 42 after the gate scanning signal maintains a level for controlling the corresponding pixel to be turned on for a preset time.
The backlight power chip 42 is electrically connected to the backlight source 2, and is configured to control the backlight of the corresponding pixel in the backlight source 2 to be turned on when the CPU inputs a backlight signal.
In a specific implementation, the backlight power chip 42 may be electrically connected to different interfaces of the processor 41, and when the processor 41 detects that the time for controlling the pixel to be turned on by the gate scanning signal transmitted by the driving circuit 2 reaches a preset time period through a clock timing unit in the backlight control circuit 4, the processor outputs a backlight signal to the backlight power chip 42, where the backlight signal includes data parameters, such as position information, of the backlight source of the corresponding pixel to be turned on in advance. Further, the backlight power chip 42 controls the backlight of the corresponding pixel to be turned on according to the parameter information in the signal.
As an example, the enable pin of the backlight power chip 42 may be connected to a General-Purpose Input/Output port (GPIO) of the processor 41, and since the backlight signal Output by the processor 41 only controls the on and off states of the backlight source 2, transmitting the backlight signal to the backlight power chip 42 through the GPIO interface of the processor 41 saves more resources and improves transmission efficiency compared to a conventional serial port.
As another example, I may be through processor 412The C interface is connected with an enabling pin of the backlight power supply chip. Through I2The data line and the clock line in the interface C can simultaneously control the backlight starting of a plurality of pixels, so that the time for controlling the backlight starting of the pixels is saved, and the transmission efficiency of backlight signals is improved.
Based on the above embodiment, the present application further provides another method for controlling the backlight source to be turned on by the backlight control circuit.
Fig. 4 is a schematic structural diagram of another specific liquid crystal display provided in an embodiment of the present application. The circuit configuration shown in fig. 4 can be applied to a backlight application of a liquid crystal display, and the voltage of vin is usually the main system power supply, and is typically 3.3V or 5V. The LED elements D1, D2, and D3 as the backlight are in series to make the light emission uniform. In fig. 4, Q1 is a boost output power switch tube, R1 is a current detection resistor, L1 is an energy storage inductor, and C1 is a filter capacitor. As shown in fig. 4, a schottky diode D4 and a capacitor C1 are added to the output circuit to obtain a dc driving current. As shown in fig. 4, the output port of the backlight control circuit 4 is electrically connected to the backlight source 2 through an energy storage inductor and/or a filter capacitor, and the power-on timing sequence of the voltage of the backlight source 2 is changed by adding the energy storage inductor and/or the filter capacitor.
The inductance value of the energy storage inductor and/or the capacitance value of the filter capacitor are determined according to a preset time length, the inductance value of the energy storage inductor and/or the capacitance value of the filter capacitor are set according to the sum of the delay time length of the pixel which is started under the control of the gate scanning signal and the delay time length displayed under the control of the display signal in the embodiment, after the backlight control circuit 4 sends a backlight signal which controls the pixel to start corresponding to the backlight source, the control voltage in the backlight signal is changed through the energy storage inductor and/or the filter capacitor, the rising time of the light sent by the backlight source 2 is larger than or equal to the preset time length, and therefore the pixel which is started in the time length of the gate scanning signal is prevented from being subjected.
To sum up, the liquid crystal display of the embodiment of the application controls the on-off of the backlight of the corresponding pixel through the backlight control circuit, when the pixel is started by the gate scanning signal, the backlight of the started pixel is controlled by the backlight control circuit to be started in a delayed manner, and the backlight is started after the gate scanning signal time period is ended, so that the pixel started in the gate scanning signal time period cannot display an image on the liquid crystal display panel, and the situation that a user sees a defective image on the display panel in the gate scanning signal time period is avoided.
In order to implement the above embodiments, the present application further provides a method for controlling a liquid crystal display. It should be noted that the control method of the liquid crystal display is implemented based on the liquid crystal display.
Fig. 5 is a schematic flowchart of a method for controlling a liquid crystal display according to an embodiment of the present application, and as shown in fig. 5, the method for controlling a liquid crystal display includes the following steps:
step 101, obtaining a gate scanning signal output by a driving circuit, wherein the gate scanning signal controls the on and off of a corresponding pixel in a liquid crystal display panel.
The driving circuit in the liquid crystal display is connected with a scanning line and a signal line of the liquid crystal display panel, the other end of the scanning line is connected with a transistor gate end of the liquid crystal display panel, and the other end of the signal line is connected with a source end of a transistor. When a user controls the display content of the liquid crystal display, firstly, the driving circuit outputs a grid scanning signal, the transistor is controlled to be turned on through the grid scanning signal, the transistor is used for generating voltage for controlling the deflection of liquid crystal molecules, and light rays emitted by the backlight source are incident on the polarizing plate through the deflected liquid crystal molecules, so that corresponding liquid crystal pixels on the liquid crystal display panel are driven to be turned on.
And step 102, when the grid scanning signal is acquired, controlling the corresponding backlight source to delay the preset duration to be started aiming at the pixel started under the control of the grid scanning signal.
It should be noted that, after the liquid crystal molecules are controlled to deflect by the deflection voltage generated by the transistor, the liquid crystal molecules cannot maintain the deflection voltage, so that when the pixel is turned on under the control of the gate scanning signal, the pixel is not set by the control voltage in the display signal, and an incorrect gray scale is displayed on the liquid crystal display panel under the irradiation of the light emitted by the backlight source of the display, and the content displayed on the liquid crystal display panel is an irregular defective picture. Therefore, in order to prevent a user from viewing a picture other than the preset display content on the liquid crystal display panel, the backlight control circuit provided in the embodiment of the present application controls the backlight source corresponding to the pixel on which the gate signal is turned on to be turned on for a preset time delay.
In specific implementation, the backlight control circuit is connected with the driving circuit and the backlight source, the backlight control circuit acquires a pixel preset to be turned on by a gate scanning signal after detecting that the driving circuit outputs the gate scanning signal, and controls the backlight source corresponding to the pixel to be turned on for a preset delay before the pixel is turned on by the gate scanning signal.
The preset time duration can be determined according to the sum of the delay time duration of the opening under the control of the pixel grid scanning signal and the delay time duration of the display under the control of the display signal. When the backlight control circuit detects that the pixel is controlled to be turned on by the gate scanning signal, the backlight source of the corresponding pixel is controlled to be turned on after the delay time of the gate scanning signal and the display signal is equal to the delay time of the display signal, and in the process that the pixel is turned on by the gate scanning signal, the backlight source of the corresponding pixel is not turned on and no light is incident to the liquid crystal display panel 1, so that the content of the corresponding pixel is not displayed on the liquid crystal display panel 1, and after the preset time is over, the backlight source corresponding to the pixel turned on by the gate scanning signal is turned on and is displayed according to the display content controlled in the display.
In summary, the control method of the liquid crystal display according to the embodiment of the application controls the on/off of the backlight of the corresponding pixel through the backlight control circuit, controls the backlight of the turned-on pixel to be turned on in a delayed manner through the backlight control circuit when the pixel is turned on by the gate scanning signal, and turns on the backlight after the gate scanning signal period is finished, so that the pixel turned on in the gate scanning signal period cannot display an image on the liquid crystal display panel, and the situation that a user sees a defective image on the display panel in the gate scanning signal period is avoided.
In order to achieve the above object, an embodiment of a third aspect of the present application provides a computer device, including: the liquid crystal display device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the control method of the liquid crystal display device is realized.
In order to implement the above embodiments, the present application also proposes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the control method of the liquid crystal display as described in the above embodiments.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (9)
1. A liquid crystal display, comprising:
the liquid crystal display panel is provided with at least one scanning line and at least one signal line and is used for controlling the opening and closing of corresponding pixels according to a grid scanning signal output by the scanning line and controlling the display content of the corresponding pixels according to a display signal transmitted by the signal line;
the backlight source is used for emitting light rays and is incident to the liquid crystal display panel;
a driving circuit electrically connected to the at least one scan line and the at least one signal line of the liquid crystal display panel, for outputting a gate scan signal to the scan line and outputting a display signal to the signal line;
the backlight control circuit is used for controlling the corresponding backlight source to delay for a preset time length to be started aiming at the pixel which is started under the control of the grid scanning signal after the driving circuit outputs the grid scanning signal, wherein the preset time length is determined according to the sum of the delay time length of the pixel which is started under the control of the grid scanning signal and the delay time length of the pixel which is displayed under the control of the display signal;
the output port of the backlight control circuit is electrically connected with the backlight source through an energy storage inductor and/or a filter capacitor;
the energy storage inductor and/or the filter capacitor are used for changing the power-on time sequence of the backlight source voltage, wherein the inductance value of the energy storage inductor and/or the capacitance value of the filter capacitor are determined according to the preset duration.
2. The liquid crystal display of claim 1,
the backlight control circuit is further configured to control the backlight of the corresponding pixel in the backlight source to be turned off when the corresponding pixel is turned off under the control of the gate scanning signal.
3. The liquid crystal display of claim 2,
the scanning lines are multiple and respectively control the on-off of the pixels of the corresponding rows of the liquid crystal display panel;
the backlight control circuit is specifically configured to control, for each row of pixels of the liquid crystal display panel, the backlight of the corresponding row of pixels to be turned on with a preset delay time after the corresponding row of pixels is turned on under the control of the gate scanning signal; and controlling the backlight of the pixels of the corresponding row to be closed when the pixels of the corresponding row are closed under the control of the grid scanning signal.
4. The liquid crystal display of any of claims 1-3, wherein the backlight control circuit comprises a processor and a backlight power chip;
the processor is electrically connected with the driving circuit and the backlight power supply chip and is used for outputting a backlight signal to the backlight power supply chip after the grid scanning signal maintains the level for controlling the corresponding pixel to be turned on for the preset time;
the backlight power supply chip is electrically connected with the backlight source and used for controlling the backlight of the corresponding pixel in the backlight source to be turned on when the processor inputs a backlight signal.
5. The liquid crystal display of claim 4,
and the enabling pin of the backlight power supply chip is electrically connected with the GPIO interface of the processor.
6. The liquid crystal display of claim 4,
the enabling pin of the backlight power supply chip is electrically connected with the I2C interface of the processor.
7. A method of controlling a liquid crystal display, the method comprising:
acquiring a gate scanning signal output by a driving circuit, wherein the gate scanning signal controls the on-off of a corresponding pixel in a liquid crystal display panel;
when the grid scanning signal is acquired, controlling a corresponding backlight source to delay for a preset time length to be started aiming at a pixel which is started under the control of the grid scanning signal, wherein the preset time length is determined according to the sum of the delay time length of the pixel which is started under the control of the grid scanning signal and the delay time length displayed under the control of a display signal, the display signal is a display signal which is output to a signal line of the liquid crystal display panel by the driving circuit, and the display signal controls the display content of a corresponding pixel in the liquid crystal display panel;
the backlight source is electrically connected with an energy storage inductor and/or a filter capacitor, and the energy storage inductor and/or the filter capacitor are used for changing the power-on time sequence of the backlight source voltage, wherein the inductance value of the energy storage inductor and/or the capacitance value of the filter capacitor are determined according to the preset time length.
8. A computer device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method of controlling a liquid crystal display as claimed in claim 7 when executing the program.
9. A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing the method of controlling the liquid crystal display device according to claim 7.
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| CN110767179B (en) * | 2019-06-10 | 2020-11-24 | 惠科股份有限公司 | Backlight control method, driving module and display device |
| CN112150975B (en) * | 2019-06-26 | 2022-06-03 | 京东方科技集团股份有限公司 | Display device and driving method thereof |
| CN110634453B (en) * | 2019-09-30 | 2021-08-31 | 京东方科技集团股份有限公司 | Pixel charging method, pixel charging circuit, display device and display control method |
| CN113808548A (en) * | 2021-09-29 | 2021-12-17 | 武汉华星光电技术有限公司 | Display device and driving method thereof |
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| CN101324727B (en) * | 2007-06-13 | 2011-12-07 | 群康科技(深圳)有限公司 | LCD and drive method thereof |
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| TWI376675B (en) * | 2007-11-02 | 2012-11-11 | Hannstar Display Corp | Pixel driving method |
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