CN111354323A - Display panel brightness control method and display device - Google Patents
Display panel brightness control method and display device Download PDFInfo
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- CN111354323A CN111354323A CN202010337276.4A CN202010337276A CN111354323A CN 111354323 A CN111354323 A CN 111354323A CN 202010337276 A CN202010337276 A CN 202010337276A CN 111354323 A CN111354323 A CN 111354323A
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
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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
- G09G3/3413—Details of control of colour illumination sources
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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
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
- G09G5/39—Control of the bit-mapped memory
- G09G5/393—Arrangements for updating the contents of the bit-mapped memory
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The embodiment of the invention provides a brightness control method of a display panel and display equipment, wherein the method comprises the following steps: acquiring a video signal; analyzing according to the video signal to obtain a data signal and a time sequence control signal; determining the refresh rate of the video signal according to the time sequence control signal; determining a first backlight modulation signal according to the refresh rate of the video signal; performing local dimming processing on the data signal to obtain a second backlight modulation signal; and obtaining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal, and controlling the brightness of the display panel according to the backlight modulation signal. The brightness of the display panel can be driven according to the refresh rate of the video signal, so that the display effect of the display panel is improved within the range of the requirement of the brightness change stability index of the display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of displays, in particular to a brightness control method of a display panel and display equipment.
Background
In order to improve the display effect of the display panel, various manufacturers have introduced a display card supporting a Variable Refresh Rate (VRR) technology. The range of the variable refresh rate of the current common display card is 48Hz-120Hz, and the display card designed at the high end is 48Hz-144 Hz. An important indicator of the display panel in VRR is that the brightness variation of the display panel should be less than 0.03nit when the frequency of the refresh rate varies by 1 Hz.
At present, in the prior art, a local dimming technique (local dimming) is mainly used for adjusting the brightness of a display panel, that is, the brightness of an image area of the display panel is counted by using an algorithm in a system chip, and compensation of the brightness (positive brightness compensation/negative brightness compensation) is performed according to a counting result.
However, the inventors found that the prior art has at least the following technical problems: in a display panel adopting the VRR technology, the charging rate of the display panel changes due to the change of the refresh rate, so that the brightness change of the display panel cannot be stabilized within the index requirement range by the existing local dimming technology, and the display effect of the display panel is affected.
Disclosure of Invention
The embodiment of the invention provides a brightness control method of a display panel and display equipment, and aims to solve the problem that the display effect of the display panel is influenced because the brightness change of the display panel cannot be stabilized within an index requirement range by the existing local dimming technology.
In a first aspect, an embodiment of the present invention provides a method for controlling brightness of a display panel, including:
acquiring a video signal;
analyzing according to the video signal to obtain a data signal and a time sequence control signal;
determining the refresh rate of the video signal according to the time sequence control signal;
determining a first backlight modulation signal according to the refresh rate of the video signal;
performing local dimming processing on the data signal to obtain a second backlight modulation signal;
and determining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal, and controlling the brightness of the display panel according to the backlight modulation signal.
In one possible design, the determining a refresh rate of the video signal according to the timing control signal includes: acquiring the low level time length between any two adjacent frames in the time sequence control signal; and determining the refresh rate of the video signal according to the low level time length and the frame active voltage time length of the time sequence control signal.
In one possible design, the determining a first backlight modulation signal according to a refresh rate of the video signal includes: and according to the corresponding relation between a plurality of pre-stored refresh rates and the Pulse Width Modulation (PWM) duty ratio, performing interpolation to obtain a first PWM duty ratio corresponding to the refresh rate of the video signal, and generating a first backlight modulation signal according to the first PWM duty ratio.
In one possible design, the video signal is: the system level chip SOC outputs a VBO video signal to the time sequence controller TCON; or the SOC receives the video signal obtained by image processing of the original video signal received by the high-definition multimedia interface or the universal serial bus.
In one possible design, the timing control signal may be at least one of: a data enable signal, a line sync signal, and a field sync signal.
In a second aspect, an embodiment of the present invention provides a brightness control apparatus for a display panel, including:
the acquisition module is used for acquiring a video signal;
the processing module is used for analyzing the video signal to obtain a data signal and a time sequence control signal; determining the refresh rate of the video signal according to the time sequence control signal; determining a first backlight modulation signal according to the refresh rate of the video signal; performing local dimming processing on the data signal to obtain a second backlight modulation signal;
and the modulation module is used for determining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal and controlling the brightness of the display panel according to the backlight modulation signal.
In a possible design, the processing module is specifically configured to obtain a low level time length between any two adjacent frames in the timing control signal; and determining the refresh rate of the video signal according to the low level time length and the frame active voltage time length of the time sequence control signal.
In a third aspect, an embodiment of the present invention provides a display device, including: the display device comprises a display panel, a time schedule controller TCON and a system on chip SOC; the display panel is used for adjusting the brightness of the display panel according to the backlight modulation signal; the SOC is used for sending a VBO video signal to the TCON; the TCON is configured to perform the brightness control method of the display panel according to the first aspect and various possible designs of the first aspect.
In a fourth aspect, an embodiment of the present invention provides a display device, including: the display device comprises a display panel, a time schedule controller TCON and a system on chip SOC; the display panel is used for adjusting the brightness of the display panel according to the backlight modulation signal; the SOC is used for receiving video signals through a high-definition multimedia interface or a universal serial bus; the SOC is further configured to perform the brightness control method for the display panel as described in the first aspect and various possible designs of the first aspect.
According to the method for controlling the brightness of the display panel and the display device, the refresh rate of a video signal is analyzed through a time sequence control signal obtained by decoding the video signal, then a first backlight modulation signal is determined according to the refresh rate of the video signal, finally a final backlight modulation signal is determined according to the first backlight modulation signal and a second backlight modulation signal obtained by regional dimming processing, the brightness of the display panel can be driven according to the refresh rate of the video signal, the brightness change of the display panel is enabled to be within a stable index requirement range, and the display effect of the display panel is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a scene of brightness control of a display panel according to an embodiment of the present invention;
fig. 2 is a first flowchart illustrating a method for controlling brightness of a display panel according to an embodiment of the present invention;
fig. 3 is a second flowchart illustrating a brightness control method for a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a data enable signal according to an embodiment of the present invention;
fig. 5 is a third schematic flowchart illustrating a brightness control method of a display panel according to an embodiment of the present invention;
fig. 6 is a diagram illustrating a correspondence between a pre-stored refresh rate and a PWM duty ratio according to an embodiment of the present invention;
fig. 7 is a first schematic structural diagram of a luminance control apparatus of a display panel according to an embodiment of the present invention;
fig. 8 is a first schematic hardware structure diagram of a display device according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a hardware structure of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First, terms related to embodiments of the present invention are explained:
VBO: the full name is V-By-One, which is a digital interface standard technology facing image information transmission. The technology can support 4.0Gbps high-speed signal transmission at most, and the VBO technology is widely applied to the field of ultra-high definition liquid crystal televisions.
PWM: pulse Width Modulation, equivalently obtains a desired waveform (including shape and amplitude) by modulating the Width of a series of pulses.
PWM duty ratio: the proportion of the whole period of the high level in one pulse period.
At present, in a display panel adopting a variable refresh rate technology, due to the change of the refresh rate of a video signal, the charging rate of the display panel changes, so that the brightness change of the display panel cannot be stabilized within an index requirement range by the existing local dimming technology, and the display effect of the display panel is influenced.
In order to solve the above technical problems, the embodiments of the present invention propose the following technical concepts: the method comprises the steps of analyzing the refresh rate of a video signal according to a time sequence control signal obtained by decoding the video signal, determining a first backlight modulation signal according to the refresh rate, determining a final backlight modulation signal according to the first backlight modulation signal and a second backlight modulation signal obtained by regional dimming processing, and controlling the brightness of a display panel according to the refresh rate of the video signal, so that the display effect of the display panel is improved within the range of the requirement of the brightness change stability index of the display panel.
Fig. 1 is a schematic view of a scene of brightness control of a display panel according to an embodiment of the present invention. In fig. 1, the display device includes: a display panel, a TCON (Time Controller), and an SOC (System on Chip). Wherein, the Display panel can be an LCD (Liquid Crystal Display); the display panel is electrically connected to the TCON, which is electrically connected to the SOC. The SOC can receive a video signal input by the display card and can send a PWM (pulse width modulation) adjusting signal to drive a backlight assembly of the display panel so as to control the brightness of the display panel. The TCON may receive a video signal transmitted by the SOC and may also transmit a PWM adjustment signal to drive a backlight assembly of the display panel to control the brightness of the display panel. That is, both TCON and SOC can realize luminance control of the display panel.
Fig. 2 is a first flowchart illustrating a method for controlling brightness of a display panel according to an embodiment of the present invention. The execution subject of the method application of the present embodiment may be the display device of fig. 1. As shown in fig. 2, the method includes:
s201: a video signal is acquired.
In this embodiment, video signals transmitted by other video source devices may be received.
Specifically, the video signal may be a video signal obtained by processing an image of an original video signal received by the SOC through a high-definition multimedia interface or a universal serial bus; or the VBO video signal output from the system on chip SOC to the timing controller TCON.
S202: and analyzing according to the video signal to obtain a data signal and a time sequence control signal.
In this embodiment, the video signal may include a data signal and a timing control signal, which may be obtained by video decoding.
The data signal can be RGB data signal and/pixel clock signal. Since the display panel can be classified into two types: i.e., a display panel using only the data enable signal and a display panel using the data enable signal, the line sync signal and the field sync signal at the same time, the timing control signal may include only the data enable DE signal or may include the data enable signal, the line sync signal and the field sync signal at the same time.
S203: the refresh rate of the video signal is determined according to the timing control signal.
In the present embodiment, the refresh rate of the video signal is determined according to the period of any one frame in the timing control signal.
S204: the first backlight modulation signal is determined according to a refresh rate of the video signal.
In this embodiment, a preset correspondence between a refresh rate and a PWM duty is queried according to the refresh rate of the video signal to obtain a first PWM duty corresponding to the refresh rate of the video signal, and a first backlight modulation signal is generated according to the first PWM duty.
S205: and carrying out local dimming processing on the data signal to obtain a second backlight modulation signal.
In this embodiment, the luminance distribution information of the display image of the display panel is counted according to the data signal, a second PWM duty is calculated according to the luminance distribution information, and a second backlight modulation signal is generated according to the second PWM duty.
S206: and determining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal, and controlling the brightness of the display panel according to the backlight modulation signal.
In this embodiment, the first backlight modulation signal and the second backlight modulation signal are multiplied to obtain a backlight modulation signal. Wherein the first backlight modulation signal, the second backlight modulation signal and the backlight modulation signal are PWM signals.
In the present embodiment, the backlight assembly of the display panel may be driven according to a backlight modulation signal (PWM signal) to control the luminance of the display panel.
As can be seen from this embodiment, in this embodiment, the refresh rate of the video signal is analyzed through the timing control signal obtained by decoding the video signal, then the first backlight modulation signal is determined according to the refresh rate of the video signal, and finally the final backlight modulation signal is determined according to the first backlight modulation signal and the second backlight modulation signal obtained by the local dimming processing, so that the luminance of the display panel can be driven according to the refresh rate of the video signal, so that the display effect of the display panel is improved within the range of the requirement of the stable index of the luminance change of the display panel.
Fig. 3 is a second flowchart illustrating a brightness control method of a display panel according to an embodiment of the present invention. The execution subject of the method application of the present embodiment may be the TCON of fig. 1. As shown in fig. 3, the method includes:
s301: and receiving VOB signals sent by the SOC.
In this embodiment, the SOC may receive an original video signal through the high-definition multimedia interface or the universal serial bus, and perform image processing on the original video signal to obtain a VOB signal.
Wherein the image processing can be image color enhancement, color correction and other processing procedures.
S302: and analyzing according to the video signal to obtain a data signal and a time sequence control signal.
Step S302 is consistent with the description of step S202, and please refer to step S202 for detailed description, which is not repeated herein.
S303: and acquiring the low level time length between any two adjacent frames in the time sequence control signal.
S304: and determining the refresh rate of the video signal according to the low level time length and the frame active voltage time length of the time sequence control signal.
Specifically, the low level time length and the frame active voltage time length of the time sequence control signal are added to obtain a frame period, the frame period is inverted to obtain a frame frequency, and the rate of certified products is the refresh rate of the video signal.
In the present embodiment, the timing control signal may be at least one of a data enable signal (DE signal), a line sync signal (HS signal), and a field sync signal (VS signal).
Referring to fig. 4, a data enable signal (DE signal) is illustrated as an example.
The time length of the low level (V-blank) between any two adjacent frames (i.e., frame N and frame N +1) of the data enable signal is denoted as T-blank.
The time length of the frame active voltage (V-active) of the data enable signal is denoted as T-active.
The frame period of the data enable signal is T-active + T-blank, and the corresponding refresh rate f is 1/(T-active + T-blank).
S305: the first backlight modulation signal is determined according to the refresh rate.
S306: and carrying out local dimming processing on the data signal to obtain a second backlight modulation signal.
S307: and determining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal, and controlling the brightness of the display panel according to the backlight modulation signal.
Steps S305 to S307 are the same as the descriptions of steps S204 to S206, and please refer to steps S204 to S206 for detailed description, which is not repeated herein.
As can be seen from this embodiment, by identifying the low level time length between two adjacent frames in the timing control signal, the refresh rate of the current VOB signal can be calculated quickly.
Fig. 5 is a third flowchart illustrating a brightness control method of a display panel according to an embodiment of the present invention. The execution subject of the method application of the present embodiment may be the SOC of fig. 1. As shown in fig. 5, the method includes:
s401: and receiving the original video signal through a high-definition multimedia interface or a universal serial bus, and performing image processing to obtain the video signal.
In this embodiment, the SOC may receive the original video signal through a high-definition multimedia interface or a universal serial bus.
The SOC is internally integrated with a data receiving module, image processing modules and a data sending module. The original video signal is received by the data receiving module, is coded and processed by each image processing module, and is finally sent to the data sending module.
S402: and analyzing according to the video signal to obtain a data signal and a time sequence control signal.
S403: the refresh rate of the video signal is determined according to the timing control signal.
Steps S402 to S403 are the same as the descriptions of steps S202 to S203, and the detailed descriptions refer to steps S202 to S203, which are not repeated herein.
S404: and according to the corresponding relation between a plurality of pre-stored refresh rates and PWM duty ratios, performing interpolation to obtain a first PWM duty ratio corresponding to the refresh rate of the video signal, and generating a first backlight modulation signal according to the first PWM duty ratio.
In this embodiment, the number of the correspondence between the plurality of refresh rates and the PWM duty ratios may be adjusted according to design requirements, for example, the number of the correspondence between the refresh rates and the PWM duty ratios may be 6, 7 or 8, which is not limited to this invention.
The interpolation method is specifically a linear interpolation method.
For example, referring to fig. 6 and table 1, the correspondence (6) of the pre-stored refresh rate and the PWM duty ratio is illustrated.
Table 1 example of correspondence between pre-stored refresh rate and PWM duty ratio
| Refresh rate (Hz) | 20 | 40 | 60 | 80 | 100 | 120 |
| PWM(％) | 85 | 87 | 90 | 94 | 98 | 100 |
In the example, when the refresh rate of the video signal is 90Hz, a first PWM duty ratio of 96% corresponding to the refresh rate of the video signal of 90Hz is calculated by linearly interpolating 94% of the PWM duty ratio corresponding to 80Hz and 98% of the PWM duty ratio corresponding to 100 Hz.
It should be noted that: if the first PWM duty cycle is a fractional number, the integer may be taken by rounding.
S405: and carrying out local dimming processing on the data signal to obtain a second backlight modulation signal.
S406: and determining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal, and controlling the brightness of the display panel according to the backlight modulation signal.
Steps S405 to S406 are the same as the descriptions of steps S205 to S206, and please refer to steps S202 to S203 for detailed description, which is not repeated herein.
As can be seen from the above description of the embodiments, according to the refresh rate of the video signal, the corresponding relationship between the pre-stored refresh rate and the PWM duty cycle is interpolated, and the refresh rate of the video signal corresponds to the PWM duty cycle, so that the refresh rate of the video signal can be accurately calculated, and the control of the brightness stability of the display panel is further improved.
Fig. 7 is a schematic structural diagram of a luminance control apparatus of a display panel according to an embodiment of the present invention. As shown in fig. 7, the luminance control apparatus of the display panel includes: an acquisition module 501, a processing module 502 and a modulation module 503.
An obtaining module 501, configured to obtain a video signal;
a processing module 502, configured to analyze the video signal to obtain a data signal and a timing control signal; determining the refresh rate of the video signal according to the time sequence control signal; determining a first backlight modulation signal according to the refresh rate of the video signal; performing local dimming processing on the data signal to obtain a second backlight modulation signal;
the modulation module 503 is configured to determine a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal, and control the brightness of the display panel according to the backlight modulation signal.
The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
In an embodiment of the present invention, the processing module 502 is specifically configured to obtain a low level time length between any two adjacent frames in the timing control signal; and determining the refresh rate of the video signal according to the low level time length and the frame active voltage time length of the time sequence control signal.
In an embodiment of the present invention, the processing module 502 is further specifically configured to perform interpolation according to a corresponding relationship between a plurality of pre-stored refresh rates and a pulse width modulation PWM duty cycle to obtain a first PWM duty cycle corresponding to the refresh rate of the video signal, and generate a first backlight modulation signal according to the first PWM duty cycle.
In one embodiment of the present invention, the video signal is: the system level chip SOC outputs a VBO video signal to the time sequence controller TCON; or the SOC receives the video signal obtained by image processing of the original video signal received by the high-definition multimedia interface or the universal serial bus.
In an embodiment of the present invention, the timing control signal may be at least one of: a data enable signal, a line sync signal, and a field sync signal.
The apparatus provided in this embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principles and technical effects are similar, which are not described herein again.
Fig. 8 is a first hardware structure diagram of a display device according to an embodiment of the present invention. As shown in fig. 8, the display device of the present embodiment includes:
a display panel 601, a timing controller TCON602, and a system on chip SOC 603.
The display panel 601 is configured to adjust the brightness of the display panel according to the backlight modulation signal;
the SOC603 is used for sending a VBO video signal to the TCON;
the TCON602 is configured to execute the brightness control method of the display panel.
In the present embodiment, the TCON602 outputs a backlight modulation signal to the display panel.
Referring to fig. 9, fig. 9 is a schematic diagram of a hardware structure of a display device according to an embodiment of the present invention. In the present embodiment, the display device includes a display panel 601, a timing controller TCON602, and a system on chip SOC 603.
The display panel 601 is configured to adjust the brightness of the display panel according to the backlight modulation signal;
the TCON602 to convert
The SOC603 is used for receiving video signals through a high-definition multimedia interface or a universal serial bus;
the SOC603 is also used for executing the brightness control method of the display panel as described above.
In the present embodiment, the SOC603 outputs a backlight modulation signal to the display panel.
The timing controller TCON602 includes a processor and a memory; wherein the memory is used for storing computer execution instructions; and the processor is used for executing the computer execution instructions stored in the memory so as to realize the steps executed by the display device in the embodiment. Reference may be made in particular to the description relating to the method embodiments described above. Alternatively, the memory may be separate or integrated with the processor. When the memories are independently arranged, the time schedule controller also comprises a bus for connecting the memories and the processor.
The SOC603 includes a processor and a memory; wherein the memory is used for storing computer execution instructions; and the processor is used for executing the computer execution instructions stored in the memory so as to realize the steps executed by the display device in the embodiment. Reference may be made in particular to the description relating to the method embodiments described above. Alternatively, the memory may be separate or integrated with the processor. When the memory is independently arranged, the system-on-chip also comprises a bus for connecting the memory and the processor.
The embodiment of the present invention further provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when a processor executes the computer-executable instructions, the method for controlling brightness of a display panel is implemented.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to implement the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit. The unit formed by the modules can be realized in a hardware form, and can also be realized in a form of hardware and a software functional unit.
The integrated module implemented in the form of a software functional module may be stored in a computer-readable storage medium. The software functional module is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor to execute some steps of the methods described in the embodiments of the present application.
It should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor, or in a combination of the hardware and software modules within the processor.
The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile storage NVM, such as at least one disk memory, and may also be a usb disk, a removable hard disk, a read-only memory, a magnetic or optical disk, etc.
The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (Extended Industry Standard Architecture) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, the buses in the figures of the present application are not limited to only one bus or one type of bus.
The storage medium may be implemented by any type or combination of volatile or non-volatile memory devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuits (ASIC). Of course, the processor and the storage medium may reside as discrete components in an electronic device or host device.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for controlling brightness of a display panel, comprising:
acquiring a video signal;
analyzing according to the video signal to obtain a data signal and a time sequence control signal;
determining the refresh rate of the video signal according to the time sequence control signal;
determining a first backlight modulation signal according to the refresh rate of the video signal;
performing local dimming processing on the data signal to obtain a second backlight modulation signal;
and determining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal, and controlling the brightness of the display panel according to the backlight modulation signal.
2. The method of claim 1, wherein determining a refresh rate of the video signal based on the timing control signal comprises:
acquiring the low level time length between any two adjacent frames in the time sequence control signal;
and determining the refresh rate of the video signal according to the low level time length and the frame active voltage time length of the time sequence control signal.
3. The method of claim 1, wherein determining the first backlight modulation signal according to the refresh rate of the video signal comprises:
and according to the corresponding relation between a plurality of pre-stored refresh rates and the Pulse Width Modulation (PWM) duty ratio, performing interpolation to obtain a first PWM duty ratio corresponding to the refresh rate of the video signal, and generating a first backlight modulation signal according to the first PWM duty ratio.
4. A method according to any one of claims 1 to 3, wherein the video signal is: the system level chip SOC outputs a VBO video signal to the time sequence controller TCON; or the SOC receives the video signal obtained by image processing of the original video signal received by the high-definition multimedia interface or the universal serial bus.
5. The method according to any of claims 1 to 3, wherein the timing control signal is at least one of: a data enable signal, a line sync signal, and a field sync signal.
6. A luminance control apparatus of a display panel, comprising:
the acquisition module is used for acquiring a video signal;
the processing module is used for analyzing the video signal to obtain a data signal and a time sequence control signal; determining the refresh rate of the video signal according to the time sequence control signal; determining a first backlight modulation signal according to the refresh rate of the video signal; performing local dimming processing on the data signal to obtain a second backlight modulation signal;
and the modulation module is used for determining a backlight modulation signal according to the first backlight modulation signal and the second backlight modulation signal and controlling the brightness of the display panel according to the backlight modulation signal.
7. The apparatus of claim 6,
the processing module is specifically configured to obtain a low level time length between any two adjacent frames in the timing control signal; and determining the refresh rate of the video signal according to the low level time length and the frame active voltage time length of the time sequence control signal.
8. A display device, comprising:
the display device comprises a display panel, a time schedule controller TCON and a system on chip SOC;
the display panel is used for adjusting the brightness of the display panel according to the backlight modulation signal;
the SOC is used for sending a VBO video signal to the TCON;
the TCON for performing the brightness control method of the display panel according to any one of claims 1 to 5.
9. A display device, comprising:
the display device comprises a display panel, a time schedule controller TCON and a system on chip SOC;
the display panel is used for adjusting the brightness of the display panel according to the backlight modulation signal;
the SOC is used for receiving video signals through a high-definition multimedia interface or a universal serial bus;
the SOC is further used for executing the brightness control method of the display panel according to any one of claims 1 to 5.
10. A computer-readable storage medium having stored therein computer-executable instructions which, when executed by a processor, implement the brightness control method of the display panel according to any one of claims 1 to 5.
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