CN114495841A - Readable storage medium, display device and backlight control device and method thereof - Google Patents
Readable storage medium, display device and backlight control device and method thereof Download PDFInfo
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- CN114495841A CN114495841A CN202011272219.9A CN202011272219A CN114495841A CN 114495841 A CN114495841 A CN 114495841A CN 202011272219 A CN202011272219 A CN 202011272219A CN 114495841 A CN114495841 A CN 114495841A
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- 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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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Abstract
The disclosure relates to a readable storage medium, a display device, a backlight control device and a control method thereof, and relates to the technical field of display. The backlight control method comprises the following steps: acquiring gray scale information of each display area in the current frame as the current gray scale information of each display area; determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information; if the current gray scale information meets the preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information; if the current gray scale information does not meet the preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame; and controlling the backlight areas to emit light according to the light emitting information of the backlight areas in the current frame.
Description
Technical Field
The disclosure relates to the technical field of display, and in particular, to a readable storage medium, a display device, a backlight control device of the display device, and a backlight control method of the display device.
Background
Currently, in order to reduce power consumption and improve image quality, a liquid crystal display device of a direct-type backlight module often employs a Local Dimming technology (Local Dimming) to implement dynamic Dimming of the backlight module. The whole backlight module is divided into a plurality of areas which can be driven independently, and the backlight corresponding to the areas is automatically adjusted according to the gray scale required to be displayed in different areas of the display picture. However, in the prior art, the speed of controlling and adjusting the backlight is slow, so that the backlight delay is severe, and the picture quality is difficult to be effectively improved.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The disclosure is directed to overcome the above-mentioned deficiencies in the prior art, and provides a readable storage medium, a display device, a backlight control device of the display device, and a backlight control method of the display device, which can improve the speed of backlight adjustment and improve the display effect.
According to one aspect of the present disclosure, a backlight control method of a display device is provided, the display device includes a backlight module and a display panel, the backlight module has a plurality of backlight areas, the display panel has a plurality of display areas corresponding to the backlight areas one by one; the backlight control method comprises the following steps:
acquiring gray scale information of each display area in the current frame as the current gray scale information of each display area;
determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information;
if the current gray scale information meets a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information;
if the current gray scale information does not meet the preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
and controlling the backlight areas to emit light according to the light emitting information of the backlight areas in the current frame.
In an exemplary embodiment of the present disclosure, the display area has a plurality of sub-pixels;
the current gray scale information includes: the maximum gray scale and the minimum gray scale of each sub-pixel of the display area in the gray scale of the current frame;
the preset conditions include:
and the difference between the maximum gray scale and the minimum gray scale of the current gray scale information is not greater than a gray scale threshold value.
In an exemplary embodiment of the present disclosure, the backlight control method further includes:
acquiring gray scale information of a previous frame of the display area;
the preset conditions further include:
the difference between the maximum gray scale and the minimum gray scale of the current gray scale information of the display area is greater than the gray scale threshold, the maximum gray scale of the current gray scale information of the display area is not greater than the maximum gray scale of the previous frame, and the minimum gray scale of the current gray scale information of the display area is not greater than the minimum gray scale of the previous frame.
In an exemplary embodiment of the present disclosure, the preset condition further includes:
the difference between the maximum gray scale and the minimum gray scale of the current gray scale information of the display area is greater than the gray scale threshold, the maximum gray scale of the current gray scale information of the display area is greater than the maximum gray scale of the previous frame, and the minimum gray scale of the current gray scale information of the display area is not greater than the minimum gray scale of the previous frame.
In an exemplary embodiment of the present disclosure, light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in a current frame is determined according to the current gray scale information; the method comprises the following steps:
calculating the average value of the maximum gray scale and the minimum gray scale of the current gray scale information of the display area as the reference gray scale of the display area to which the current gray scale information belongs;
and determining the light-emitting information corresponding to the reference gray scale as the light-emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the mapping relation between the reference gray scale and the preset light-emitting information and the preset gray scale.
In an exemplary embodiment of the present disclosure, light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in a current frame is determined according to the reference light emitting information of a previous frame; the method comprises the following steps:
and the reference light-emitting information of the previous frame is used as the light-emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame.
In an exemplary embodiment of the present disclosure, the backlight section includes a plurality of backlight units;
controlling each backlight area to emit light according to the light emitting information of each backlight area in the current frame; the method comprises the following steps:
determining the duty ratio of the backlight unit of each backlight area in the current frame according to the light emitting information of each backlight area in the current frame;
and controlling each backlight unit to emit light according to the duty ratio.
According to an aspect of the present disclosure, a backlight control apparatus of a display apparatus is provided, the display apparatus includes a backlight module having a plurality of backlight areas and a display panel having a plurality of display areas corresponding to the backlight areas one to one; the backlight control device includes:
the gray scale acquisition module is used for acquiring the gray scale information of each display area in the current frame as the current gray scale information of each display area;
the first processing module is used for determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information;
the second processing module is used for determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information when the current gray scale information meets a preset condition; when the current gray scale information does not meet a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
and the backlight execution module is used for controlling each backlight area to emit light according to the light emitting information of each backlight area in the current frame.
According to one aspect of the present disclosure, a display device is provided, including a backlight module and a display panel, the backlight module having a plurality of backlight areas, the display panel having a plurality of display areas corresponding to the backlight areas one to one; the display device further includes:
the time sequence controller is used for acquiring the gray scale information of each display area in the current frame as the current gray scale information of each display area; determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information;
the backlight controller is used for determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information when the current gray scale information meets a preset condition; when the current gray scale information does not meet a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
and the light-emitting driver is used for controlling the light emission of each backlight area according to the light-emitting information of each backlight area in the current frame.
According to an aspect of the present disclosure, there is provided a readable storage medium storing a computer program which, when executed by a processor, implements a backlight control method as described in any one of the above.
According to the readable storage medium, the display device and the backlight control device and the control method thereof, when the current gray scale information does not meet the preset condition, the light emitting information of the current frame can be determined according to the reference light emitting information of the previous frame so as to control the backlight area to emit light; when the current gray scale information meets the preset condition, the light-emitting information of the current frame can be directly determined according to the gray scale information without adopting the reference light-emitting information of the previous frame. When the reference light-emitting information is determined, whether the current gray scale information meets a preset condition or not can be judged, and when the current gray scale information meets the preset condition, the light-emitting information of the current frame is determined according to the current gray scale information. Therefore, the process of determining the luminous information of the current frame can be divided into a plurality of conditions and processed respectively, so that the operation efficiency is improved to the maximum extent, the backlight delay is shortened, the backlight adjusting time is shortened, and the display effect is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic diagram of an embodiment of a display device according to the present disclosure.
Fig. 2 is a flowchart illustrating a backlight control method according to an embodiment of the disclosure.
Fig. 3 is a flowchart illustrating another embodiment of a backlight control method according to the disclosure.
Fig. 4 is a schematic diagram illustrating the determination of current gray scale information and preset conditions in the backlight control method according to the present disclosure.
Fig. 5 is a flowchart of step S130 of the backlight control method of the present disclosure.
Fig. 6 is a flowchart of step S150 of the backlight control method of the present disclosure.
FIG. 7 is a diagram illustrating a data format of gray scale information according to the present disclosure.
Fig. 8 is a schematic diagram of a data format of the lighting information of the present disclosure.
Fig. 9 is a schematic diagram of a backlight control device according to an embodiment of the disclosure.
FIG. 10 is a schematic diagram of an embodiment of a storage medium readable by the present disclosure.
Description of reference numerals:
1. a backlight module; 101. a backlight area; 2. a display panel; 201. a display area; 3. a time schedule controller; 4. a backlight controller; 5. a backlight driving circuit; 100. a gray scale acquisition module; 200. a first processing module; 300. a second processing module; 400. and a backlight execution module.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not limiting on the number of their objects.
The liquid crystal display device comprises a liquid crystal display panel and a backlight module. Generally, a liquid crystal display panel includes an array substrate and a color film substrate that are oppositely disposed to form a liquid crystal cell, and a liquid crystal layer is filled between the array substrate and the color film substrate in the liquid crystal cell; the array substrate is provided with a first polaroid, the color film substrate is provided with a second polaroid, and the polarization directions of the first polaroid and the second polaroid are perpendicular to each other. The backlight module is arranged on the non-display side of the liquid crystal display panel and used for providing a plane light source for the display of the liquid crystal display panel. Under the action of a driving electric field formed between a pixel electrode of a sub-pixel arranged on the array substrate and a common electrode arranged on the array substrate or a common electrode arranged on the color film substrate, liquid crystal molecules of the liquid crystal layer deflect, the liquid crystal molecules can control the polarization direction of light passing through the liquid crystal layer after deflecting by a preset angle, and the transmittance of the light is controlled under the matching of the first polarizer and the second polarizer, so that gray scale display is realized.
The backlight module can be a direct type backlight module or a side type backlight module. Taking the direct type backlight module as an example, the direct type backlight module may include a plurality of backlight units distributed in an array, the backlight units may be LEDs (light emitting diodes), and light emitted from the point light sources is diffused and homogenized and then enters the liquid crystal panel for display.
For the direct type backlight module, a Local Dimming (Local Dimming) technology may divide the entire backlight unit into a plurality of backlight regions that can be driven individually, each of the backlight regions including one or more backlight units that can emit light. The driving current of the backlight unit of the backlight area corresponding to different areas of the display picture is automatically adjusted according to the gray scales to be displayed in the areas, so that the brightness of each backlight area in the backlight module is independently adjusted, and the contrast of the display picture can be improved.
Specifically, when local dimming is implemented, image information of an image displayed on the display panel can be acquired through a time sequence controller (TCON), and the image information can be sent to the display panel through the time sequence controller, so that the display panel determines the gray scale state of each sub-pixel of the display panel according to the image information; the time sequence controller can also calculate gray scale information required to be displayed by each sub-pixel of the display panel according to the image information, and determine light emitting information required to emit light in each backlight area of the backlight module according to the gray scale information. The time sequence controller can send the light-emitting information to the backlight controller, the backlight controller converts the light-emitting information and sends the light-emitting information to the backlight unit to control the backlight unit to emit light, and independent adjustment of the backlight unit in each backlight area is achieved. In this process, the calculation amount of the timing controller to calculate the light emission information is large, for example: the process of obtaining the gray scale information of each sub-pixel from the image information, converting the gray scale information into the light emitting information of the backlight unit and sending the light emitting information to the backlight controller needs a long time, and after the light emitting information is sent to the backlight, a plurality of frames are passed, so that the backlight adjustment is delayed, and the display effect is influenced.
The present disclosure provides a backlight control method of a display device, as shown in fig. 1, the display device is a liquid crystal display device, and may include a backlight module 1 and a display panel 2, where the backlight module 1 may be a direct-type backlight module having a plurality of backlight areas 101, each backlight area 101 has a plurality of backlight units capable of emitting light, and the backlight units may be LEDs.
The display panel 2 is a liquid crystal display panel, and may have a plurality of display regions 201 corresponding to the backlight regions 101 one by one, each display region 201 has a plurality of pixels, each pixel includes a plurality of sub-pixels, and each sub-pixel may modulate and filter light emitted from the backlight module, so that each sub-pixel may emit monochromatic light of a plurality of gray scales, thereby displaying an image. The detailed structure of the display panel 2 can refer to the above description of the liquid crystal display panel, and will not be described in detail here.
In addition, the display device further comprises a driving circuit, the driving circuit comprises a time schedule controller 3, a backlight controller 4 and a backlight driving circuit 5, and each backlight unit of the backlight module 2 is connected with the backlight driving circuit 5.
As shown in fig. 2, the backlight control method of the embodiment of the present disclosure may include steps S110 to S150, where:
step S110, obtaining gray scale information of each display area in the current frame as current gray scale information of each display area.
And step S120, determining reference light-emitting information of a backlight area corresponding to the display area to which the current gray scale information belongs in a next frame according to the current gray scale information.
Step S130, if the current gray scale information meets a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information.
Step S140, if the current gray scale information does not satisfy a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame.
Step S150, controlling each backlight area to emit light according to the light emitting information of each backlight area in the current frame.
According to the backlight control method, when the reference light-emitting information is determined, whether the current gray scale information meets the preset condition or not can be judged, and the light-emitting information of the current frame is determined according to the current gray scale information when the current gray scale information meets the preset condition. Therefore, the process of determining the luminous information of the current frame can be divided into a plurality of conditions and processed respectively, so that the operation efficiency is improved to the maximum extent, the backlight delay is shortened, the backlight adjusting time is shortened, and the display effect is improved.
The following describes the steps of the backlight control method according to the embodiment of the present disclosure in detail:
in step S110, gray scale information of each display area in the current frame is obtained as current gray scale information of each display area.
As shown in fig. 1, the gray scale information of the display area 201 in the current frame refers to the gray scale information that needs to be provided to each display area 201 for controlling the liquid crystal deflection state, that is, the gray scale information is obtained before being output to the display panel 2. Specifically, the image information of the current frame may be obtained first, and then the gray scale information required by each display area 201 may be determined according to the image information of the current frame. The gray scale information to be displayed in each display region 201 is used to control the deflection state of the liquid crystal of each sub-pixel in each display region 201, so that the backlight module 1 emits light with a specific gray scale when emitting light.
The current gray scale information may be obtained by the backlight controller 4, and the backlight controller 4 may be an MCU (micro controller Unit). For example, the timing controller 3 may acquire image information of a current frame, determine current gray scale information required by each display area 201, and send the current gray scale information to the backlight controller 4. Meanwhile, the timing controller 3 may control the deflection state of the liquid crystal of each sub-pixel of each display region 201 through the source driving circuit and the gate driving circuit according to the current gray scale information.
In step S120, reference light emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame is determined according to the current gray scale information.
As shown in fig. 1, the backlight unit of the backlight area 101 may emit light at a specific brightness according to light emission information. The light emitting information of the next frame that can be provided to each corresponding backlight area 101 can be calculated according to the current gray scale information that each display area 210 needs to display, and can be used as the reference light emitting information. Since the calculation process requires a certain time, the backlight controller 4 may already acquire the gray scale information of the next frame when calculating the reference light emission information.
In the display apparatus, the above-described step S120, i.e., the process of determining the reference lighting information, may be performed by the timing controller 3, and the reference lighting information may be transmitted to the backlight controller 4.
In steps S130 and S140, the current gray scale information of the display area 201 may include: each sub-pixel of the display area 201 has a maximum gray level and a minimum gray level among gray levels of the current frame. That is, in each frame, the gray scale information of the display area 201 includes the required gray scale of each sub-pixel in the frame, and the gray scale information of any display area 201 may be the maximum gray scale and the minimum gray scale of all the gray scales of the display area 201. For example: the display area 201 has n sub-pixels, the display area 201 has n gray scales at the i-th frame, and the gray scale information of the display area 201 at the i-th frame includes the maximum gray scale and the minimum gray scale among the n gray scales of the i-th frame.
The following describes in detail whether the current gray scale information satisfies the preset condition:
the preset conditions may include: the difference between the maximum gray level and the minimum gray level of the current gray level information of the display area 201 is not greater than the gray level threshold.
The backlight controller 4 can calculate the difference between the maximum gray scale and the minimum gray scale of the display region 201 in the current frame according to the current gray scale information; and comparing the difference value with a preset gray level threshold value, and if the difference value between the maximum gray level and the minimum gray level is not greater than the gray level threshold value, judging that the current gray level information meets the preset condition. The magnitude of the gray level threshold is not particularly limited.
Further, if the difference between the maximum gray scale and the minimum gray scale of the current gray scale information in the display area 201 is greater than the gray scale threshold, it does not mean that the current gray scale information does not meet the preset condition, but the current gray scale information can be compared with the gray scale information of the previous frame, and according to the comparison result, whether the current gray scale information meets the preset condition is further determined. For example:
in some embodiments of the present disclosure, as shown in fig. 3, the backlight control method of the present disclosure may further include:
step S160, obtaining the gray scale information of the previous frame of the display area.
The gray scale information of the previous frame may include the maximum gray scale and the minimum gray scale of the display region 201 of the previous frame.
The preset conditions may further include:
the difference between the maximum gray scale and the minimum gray scale of the current gray scale information in the display area 201 is greater than the gray scale threshold, the maximum gray scale of the current gray scale information is not greater than the maximum gray scale of the previous frame, and the minimum gray scale of the current gray scale information is not greater than the minimum gray scale of the previous frame.
Further, the preset conditions may further include:
the difference between the maximum gray scale and the minimum gray scale of the current gray scale information of the display area 201 is greater than the gray scale threshold, the maximum gray scale of the current gray scale information of the display area 201 is greater than the maximum gray scale of the previous frame, and the minimum gray scale of the current gray scale information of the display area 201 is not greater than the minimum gray scale of the previous frame.
Based on the preset condition, the current gray scale information not meeting the preset condition may include: the difference between the maximum gray scale and the minimum gray scale of the current gray scale information of the display area 201 is greater than the gray scale threshold, the maximum gray scale of the current gray scale information of the display area 201 is not greater than the maximum gray scale of the previous frame, and the minimum gray scale of the current gray scale information of the display area 201 is greater than the minimum gray scale of the previous frame.
In summary of the above description about the preset condition, in some embodiments of the present disclosure, as shown in fig. 4, the process of determining whether the current gray scale information satisfies the preset condition is as follows:
judging whether the difference between the maximum gray scale and the minimum gray scale of the current gray scale information is greater than a gray scale threshold value or not, and if the difference between the maximum gray scale and the minimum gray scale of the current gray scale information is not greater than the gray scale threshold value, judging that the current gray scale information meets the preset condition;
if the difference between the maximum gray scale and the minimum gray scale of the current gray scale information is larger than a gray scale threshold value, judging whether the minimum gray scale of the current gray scale information is larger than the minimum gray scale of the previous frame, and if the minimum gray scale of the current gray scale information is not larger than the minimum gray scale of the previous frame, judging that the current gray scale information meets a preset condition; and if the minimum gray scale of the current gray scale information is larger than the minimum gray scale of the last frame, judging that the current gray scale information does not accord with the preset condition.
On the basis of judging whether the current gray scale information meets the preset condition, the light emitting information of the backlight area 101 in the current frame can be determined according to the judgment result. For example:
in some embodiments of the present disclosure, if the current gray scale information satisfies a preset condition, the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame may be determined according to the current gray scale information. Further, as shown in fig. 5, step S130 may include step S1310 and step S1320, wherein:
step S1310, calculating an average value of the maximum gray scale and the minimum gray scale of the current gray scale information of the display area, and using the average value as a reference gray scale of the display area to which the current gray scale information belongs.
Step S1320, determining the light-emitting information corresponding to the reference gray scale according to the mapping relationship between the reference gray scale and the preset gray scale and the light-emitting information, and using the light-emitting information as the light-emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame.
The mapping relationship between the gray scale and the light emitting information may be preset, and includes a plurality of gray scales and a plurality of light emitting information, and each gray scale corresponds to unique light emitting information. Therefore, the corresponding light-emitting information can be found out according to the reference gray scale and used as the light-emitting information of the current frame, and the complicated operation is avoided
In step S140, if the current gray scale information does not satisfy the preset condition, the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame may be determined according to the reference light emitting information of the previous frame. For example, the reference light-emitting information of the previous frame can be directly used as the light-emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame. That is, the reference light emission information currently calculated by the timing controller 3 is for determining the light emission information of the next frame when the current gray scale information does not satisfy the preset condition.
Steps S130 and S140 may be performed by the backlight controller 4, not by the timing controller 3, and thus may be performed simultaneously with the process of calculating the reference lighting information by the timing controller 3, which is advantageous to improve the working efficiency.
In summary, the backlight controller 4 can select different ways to determine the light-emitting information according to the judgment result of the current gray scale information and the preset condition, instead of waiting for the timing controller 3 to calculate all the light-emitting information, and then use the light-emitting information, thereby shortening the light-emitting delay of the backlight area 101 and better matching the timing of the display area 201 for controlling the liquid crystal deflection state.
In step S150, each backlight area is controlled to emit light according to the light emission information of the backlight area in the current frame.
For example, as shown in fig. 6, step S150 may include step S1510 and step S1520, wherein:
step S1510 determines the duty ratio of the backlight unit in each backlight area in the current frame according to the light emitting information of each backlight area in the current frame.
The duty cycle of the current frame may be determined by the backlight controller based on the lighting information of the current frame.
The data format of the lighting information is shown in fig. 7, and includes two parts, namely, a maximum gray level max and a minimum gray level min. Data format of duty ratio as shown in fig. 8, LDC data is used to indicate the width of a signal for driving light emission in one period.
And step S1520, controlling each backlight unit to emit light according to the duty ratio.
The backlight controller 4 may send the duty ratio of the current frame to the backlight driving circuit 5, and the backlight driving circuit 5 converts the signal of the duty ratio into a control signal and sends the control signal to the backlight unit to control the luminance of the light emitted by the backlight unit, thereby implementing the luminance adjustment.
Moreover, although the steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that the steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
The embodiments of the present disclosure provide a backlight control device of a display device, the structure of which has been described above and will not be described in detail herein. As shown in fig. 9, the backlight control apparatus may include a gray scale obtaining module 100, a first processing module 200, a second processing module 300, and a backlight executing module 400, wherein:
the gray scale obtaining module 100 is configured to obtain gray scale information of each display area in a current frame, as current gray scale information of each display area;
the first processing module 200 is configured to determine, according to the current gray scale information, reference light emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame;
the second processing module 300 is configured to determine, according to the current gray scale information, light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in a current frame when the current gray scale information meets a preset condition; when the current gray scale information does not meet a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
the backlight executing module 400 is configured to control each backlight area to emit light according to the light emitting information of each backlight area in the current frame.
The details of each module in the backlight control apparatus have been described in detail in the corresponding backlight control method, and therefore, the details are not described herein again.
The embodiments of the present disclosure also provide a display device, the structures of the backlight module 1 and the display panel 2 of which have been described above and are not described in detail herein. As shown in fig. 1, the display device further includes:
the time sequence controller 3 is used for acquiring the gray scale information of each display area in the current frame as the current gray scale information of each display area; determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information;
the backlight controller 4 is configured to determine, according to the current gray scale information, light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in a current frame when the current gray scale information meets a preset condition; when the current gray scale information does not meet a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
the backlight driving circuit 5 is used for controlling each backlight area to emit light according to the light emitting information of each backlight area in the current frame.
The gray scale acquiring module 100 and the second processing module 300 of the backlight control device of the present disclosure may be functional modules in the backlight controller 4, and the first processing module 200 may be a functional module in the timing controller 3. Therefore, the backlight controller 4 is fully utilized while the time schedule controller 3 performs operation, so that the speed of outputting luminous information is improved, the time for adjusting backlight is shortened, and the working efficiency is improved.
The details of each part of the backlight control device are described in detail in the corresponding backlight control method, and therefore, the details are not described herein again.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit according to embodiments of the disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
The disclosed embodiments provide a readable storage medium storing a computer program that when executed by a processor implements the backlight control method of any of the above embodiments. Aspects of the present disclosure may also be embodied in the form of a program product comprising program code for causing a processor to perform the steps according to various exemplary embodiments of the present disclosure as described in the above-mentioned backlight control method of the present specification, when the program product is run on the processor.
As shown in fig. 10, a program product 600 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a processor, such as a personal computer. However, the program product of the present disclosure is not so limited, and in this document, the readable storage medium 600 may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a mobile terminal, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. The backlight control method of the display device is characterized in that the display device comprises a backlight module and a display panel, wherein the backlight module is provided with a plurality of backlight areas, and the display panel is provided with a plurality of display areas corresponding to the backlight areas one by one; the backlight control method comprises the following steps:
acquiring gray scale information of each display area in the current frame as the current gray scale information of each display area;
determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information;
if the current gray scale information meets a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information;
if the current gray scale information does not meet the preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
and controlling the backlight areas to emit light according to the light emitting information of the backlight areas in the current frame.
2. The backlight control method according to claim 1, wherein the display area has a plurality of sub-pixels;
the current gray scale information includes: the maximum gray scale and the minimum gray scale of each sub-pixel of the display area in the gray scale of the current frame;
the preset conditions include:
and the difference between the maximum gray scale and the minimum gray scale of the current gray scale information is not greater than a gray scale threshold value.
3. The backlight control method according to claim 2, further comprising:
acquiring gray scale information of a previous frame of the display area;
the preset conditions further include:
the difference between the maximum gray scale and the minimum gray scale of the current gray scale information of the display area is greater than the gray scale threshold, the maximum gray scale of the current gray scale information of the display area is not greater than the maximum gray scale of the previous frame, and the minimum gray scale of the current gray scale information of the display area is not greater than the minimum gray scale of the previous frame.
4. The backlight control method according to claim 3, wherein the preset condition further comprises:
the difference between the maximum gray scale and the minimum gray scale of the current gray scale information of the display area is greater than the gray scale threshold, the maximum gray scale of the current gray scale information of the display area is greater than the maximum gray scale of the previous frame, and the minimum gray scale of the current gray scale information of the display area is not greater than the minimum gray scale of the previous frame.
5. The backlight control method according to claim 2, wherein the backlight area corresponding to the display area to which the current gray scale information belongs is determined according to the current gray scale information; the method comprises the following steps:
calculating the average value of the maximum gray scale and the minimum gray scale of the current gray scale information of the display area as the reference gray scale of the display area to which the current gray scale information belongs;
and determining the light-emitting information corresponding to the reference gray scale as the light-emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the mapping relation between the reference gray scale and the preset gray scale and the light-emitting information.
6. The backlight control method according to claim 2, wherein the lighting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame is determined according to the reference lighting information of the previous frame; the method comprises the following steps:
and the reference light-emitting information of the previous frame is used as the light-emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame.
7. The backlight control method according to claim 1, wherein the backlight section includes a plurality of backlight units;
controlling each backlight area to emit light according to the light emitting information of each backlight area in the current frame; the method comprises the following steps:
determining the duty ratio of the backlight unit of each backlight area in the current frame according to the light emitting information of each backlight area in the current frame;
and controlling each backlight unit to emit light according to the duty ratio.
8. The backlight control device of the display device is characterized by comprising a backlight module and a display panel, wherein the backlight module is provided with a plurality of backlight areas, and the display panel is provided with a plurality of display areas corresponding to the backlight areas one by one; the backlight control device includes:
the gray scale acquisition module is used for acquiring the gray scale information of each display area in the current frame as the current gray scale information of each display area;
the first processing module is used for determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information;
the second processing module is used for determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information when the current gray scale information meets a preset condition; when the current gray scale information does not meet a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
and the backlight execution module is used for controlling each backlight area to emit light according to the light emitting information of each backlight area in the current frame.
9. A display device is characterized by comprising a backlight module and a display panel, wherein the backlight module is provided with a plurality of backlight areas, and the display panel is provided with a plurality of display areas corresponding to the backlight areas one by one; the display device further includes:
the time sequence controller is used for acquiring the gray scale information of each display area in the current frame as the current gray scale information of each display area; determining reference light-emitting information of a backlight area corresponding to a display area to which the current gray scale information belongs in a next frame according to the current gray scale information;
the backlight controller is used for determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the current gray scale information when the current gray scale information meets a preset condition; when the current gray scale information does not meet a preset condition, determining the light emitting information of the backlight area corresponding to the display area to which the current gray scale information belongs in the current frame according to the reference light emitting information of the previous frame;
and the light-emitting driver is used for controlling the light emission of each backlight area according to the light-emitting information of each backlight area in the current frame.
10. A readable storage medium storing a computer program, wherein the program, when executed by a processor, implements the backlight control method of any one of claims 1-7.
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