WO2023273865A1 - 背光驱动方法、装置及计算机设备 - Google Patents
背光驱动方法、装置及计算机设备 Download PDFInfo
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- WO2023273865A1 WO2023273865A1 PCT/CN2022/098601 CN2022098601W WO2023273865A1 WO 2023273865 A1 WO2023273865 A1 WO 2023273865A1 CN 2022098601 W CN2022098601 W CN 2022098601W WO 2023273865 A1 WO2023273865 A1 WO 2023273865A1
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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
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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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
- G09G3/3426—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines the different display panel areas being distributed in two dimensions, e.g. matrix
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- 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
- G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G3/2096—Details of the interface to the display terminal specific for a flat panel
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- 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
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- G—PHYSICS
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- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
- G09G2340/0435—Change or adaptation of the frame rate of the video stream
Definitions
- the present application relates to the field of display technology, in particular to a backlight driving method, device and computer equipment.
- the display panel includes a backlight source.
- the backlight source of the display panel can be divided into multiple backlight areas, and the brightness of each backlight area can be adjusted independently.
- a backlight driving device needs to drive multiple backlight areas of the backlight according to a grayscale clock signal (GCLK) and driving data.
- GCLK grayscale clock signal
- the gray-scale clock signal is used to determine the lighting timing of each backlight area during the process of displaying a frame of image on the display panel.
- One of the purposes of the embodiments of the present application is to provide a backlight driving method, device, and computer equipment, which can match the frequency of the grayscale clock signal with the frame refresh rate of the display panel when the frame refresh rate of the display panel is changed, thereby Improve the display effect of the display panel.
- a backlight driving method for driving a backlight source of a display panel comprising:
- the local dimming data comprising a frame refresh rate of the display panel and brightness data of each of the plurality of backlight areas
- the plurality of backlight areas are driven according to the grayscale clock signal and the driving data.
- the local dimming data before generating the local dimming data, it also includes:
- Brightness data for each backlight area of the plurality of backlight areas is determined based on the image data.
- the generating the grayscale clock signal according to the frame refresh rate in the local dimming data includes:
- the target frequency is determined by the following formula
- the GCLK Rate is the target frequency
- the P is the number of grayscale clock signals when the display panel displays a frame of images
- the Frame rate is the frame refresh rate in the local dimming data
- the dummy time is the blank time when the display panel displays a frame of images
- the method before driving the plurality of backlight regions according to the grayscale clock signal and the driving data, the method further includes:
- the driving the plurality of backlight regions according to the grayscale clock signal and the driving data includes:
- the plurality of backlight areas are driven according to the grayscale clock signal, the frame synchronization signal and the driving data.
- the local dimming data further includes an index mark
- the acquiring the frame synchronization signal includes:
- the frame synchronization signal is generated according to an index mark in the local dimming data.
- the local dimming data includes an index field, a frame refresh rate field and a brightness data field
- the frame refresh rate field is located between the index field and the brightness data field
- the index field contains The index mark
- the frame refresh rate field includes the frame refresh rate
- the brightness data field includes the plurality of brightness data.
- a backlight driving device for driving a backlight source of a display panel, the backlight source includes a plurality of backlight regions, and the backlight driving device includes:
- a first generating module configured to generate local dimming data, where the local dimming data includes a frame refresh rate of the display panel and brightness data of each backlight area in the plurality of backlight areas;
- a second generating module configured to generate a grayscale clock signal according to the frame refresh rate in the local dimming data, where the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data;
- a third generating module configured to generate driving data according to a plurality of brightness data in the local dimming data
- a driving module configured to drive the plurality of backlight regions according to the grayscale clock signal and the driving data.
- the backlight driving device further includes:
- a first acquisition module configured to acquire image data of an image to be displayed and a frame refresh rate of the display panel
- a determination module configured to determine brightness data of each backlight area in the plurality of backlight areas according to the image data.
- the second generation module includes:
- a determining unit configured to determine the target frequency according to the frame refresh rate in the local dimming data through the following formula
- the GCLK Rate is the target frequency
- the P is the number of grayscale clock signals when the display panel displays a frame of images
- the Frame rate is the frame refresh rate in the local dimming data
- the dummy time is the blank time when the display panel displays a frame of images
- a generating unit configured to generate the gray scale clock signal whose frequency is the target frequency.
- the backlight driving device further includes:
- the second obtaining module is used to obtain the frame synchronization signal
- the driving module is used for driving the plurality of backlight areas according to the grayscale clock signal, the frame synchronization signal and the driving data.
- the local dimming data further includes an index mark; the second obtaining module is configured to generate the frame synchronization signal according to the index mark in the local dimming data.
- the local dimming data includes an index field, a frame refresh rate field and a brightness data field
- the frame refresh rate field is located between the index field and the brightness data field
- the index field contains The index mark
- the frame refresh rate field includes the frame refresh rate
- the brightness data field includes the plurality of brightness data.
- a computer device in a third aspect, includes a memory, a processor, and a computer program stored in the memory and operable on the processor, the computer program being executed by the processor When implementing the backlight driving method as described in the first aspect.
- a computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the backlight driving method as described in the first aspect is implemented.
- the local dimming data includes the frame refresh rate of the display panel and the brightness data of each backlight area in the plurality of backlight areas.
- the grayscale clock signal is generated according to the frame refresh rate in the local dimming data, so that the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data.
- the driving data is generated based on a plurality of luminance data in the local dimming data. In this way, when multiple backlight regions are driven according to the grayscale clock signal and driving data, regardless of whether the frame refresh rate of the display panel changes, the frequency of the grayscale clock signal always matches the frame refresh rate of the display panel, thereby improving the performance of the display panel. display effect.
- FIG. 1 is a schematic structural diagram of a computer device provided by an embodiment of the present application.
- FIG. 2 is a flow chart of the first backlight driving method provided by the embodiment of the present application.
- FIG. 3 is a schematic structural diagram of a backlight provided by an embodiment of the present application.
- FIG. 4 is a flowchart of a second backlight driving method provided by an embodiment of the present application.
- FIG. 5 is a flowchart of a third backlight driving method provided by an embodiment of the present application.
- Fig. 6 is a data structure diagram of local dimming data provided by an embodiment of the present application.
- FIG. 7 is a schematic diagram of data transmission provided by an embodiment of the present application.
- FIG. 8 is a schematic structural diagram of a backlight driving device provided by an embodiment of the present application.
- FIG. 9 is a schematic structural diagram of a computer device provided by an embodiment of the present application.
- the display panel includes a backlight source.
- the backlight source of the display panel can be divided into multiple backlight areas, and the brightness of each backlight area can be adjusted independently.
- the backlight driving device needs to drive multiple backlight areas of the backlight according to gray scale clock signals and driving data.
- the grayscale clock signal is used to determine the lighting timing of each backlight area during the process of displaying a frame of image on the display panel;
- the driving data is used to determine the light emitting brightness of each backlight area during the process of displaying a frame of image on the display panel.
- the frequency of the gray scale clock signal is fixed.
- display panels generally have at least two different frame refresh rates. After the frame refresh rate of the display panel is changed, if the frequency of the grayscale clock signal does not match the frame refresh rate of the display panel, the display effect of the display panel may be affected.
- the embodiment of the present application provides a backlight driving method, which can match the frequency of the grayscale clock signal with the frame refresh rate of the display panel when the frame refresh rate of the display panel is changed, thereby improving the display effect of the display panel.
- the backlight driving method provided in the embodiment of the present application may be applied to a computer device to drive a backlight source of a display panel, and the computer device may include a display panel.
- Fig. 1 is a schematic structural diagram of a computer device provided by an embodiment of the present application.
- the computer device 10 may include a timing control chip (Timer Control Register Integrated Circuit, TCON IC) 12, Microcontroller Unit Integrated Circuit (MCU IC) 14 and Light-Emitting Diode Driver Integrated Circuit (LED Driver IC) 16.
- the timing control chip 12, the single-chip microcomputer chip 14 and the LED driver chip 16 work together to implement the backlight driving method provided by the embodiment of the present application to drive the backlight of the display panel.
- FIG. 2 is a flow chart of a backlight driving method provided by an embodiment of the present application.
- the backlight driving method is used to drive the backlight 20 of the display panel.
- FIG. 3 is a schematic structural diagram of a backlight provided by an embodiment of the present application. As shown in FIG. 3 , a backlight 20 of a display panel includes a plurality of backlight regions 22 . Referring to Fig. 2, the method includes the following steps S100 to S400.
- Step S100 the computer device 10 generates local dimming data, the local dimming data includes the frame refresh rate of the display panel and the brightness data of each backlight area 22 in the plurality of backlight areas 22 .
- the display panel When the display panel is working, it will continuously display multiple frames of images within one second, and the brightness of the same position of the display panel may change when different images are displayed.
- the luminous brightness of a certain area of the image to be displayed is relatively high, when the display panel displays the image, the brightness of the backlight area 22 corresponding to this area is also relatively large; otherwise, when the luminous brightness of a certain area of the image to be displayed If it is smaller, when the display panel displays the image, the brightness of the backlight area 22 corresponding to this area is also smaller, so that the contrast of the display panel can be increased.
- the local dimming data refers to data for adjusting brightness of a plurality of backlight regions 22 according to images to be displayed.
- the local dimming data includes brightness data for each backlight zone 22 of the plurality of backlight zones 22 .
- the luminance data of the backlight area 22 is used to indicate the luminance of the backlight area 22 when it emits light.
- the luminance of the backlight area 22 is the embodiment of the brightness data of the backlight area 22 .
- the local dimming data also includes the frame refresh rate of the display panel.
- the frame refresh rate of the display panel refers to the number of frames that the display panel displays an image within one second.
- the display panel has at least two different frame refresh rates, so that the display panel can work with different frame refresh rates in different application scenarios.
- the display panel has a first refresh rate and a second refresh rate, the first refresh rate may be 60 Hz (Hertz), and the second refresh rate may be 120 Hz.
- the display panel can work at the first refresh rate. At this time, the display panel displays 60 images per second.
- the display panel can work at the second refresh rate. At this time, the display panel displays 120 images per second.
- the local dimming data includes a frame refresh rate of the display panel, and the frame refresh rate is a real-time frame refresh rate of the display panel.
- step S100 may be executed by the timing control chip 12 in the computer device 10 . That is, the sequential control chip 12 generates local dimming data, and the local dimming data includes the frame refresh rate of the display panel and the brightness data of each backlight area 22 in the plurality of backlight areas 22 .
- step S200 the computer device 10 generates a grayscale clock signal according to the frame refresh rate in the local dimming data, and the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data.
- Each backlight area 22 of the backlight source 20 in the display panel usually includes a light emitting device and a driving circuit for controlling the light emitting device to emit light.
- the driving circuit works under the action of the scanning signal and the driving signal, and only when the scanning signal and the driving signal act on the driving circuit at the same time, the driving circuit is turned on and the light emitting device emits light.
- the grayscale clock signal is used to determine the output timing of the scan signal.
- the gray-scale clock signal is composed of a high-level signal and a low-level signal, and a high-level signal and a low-level signal form a gray-scale clock signal.
- the switching of the grayscale clock signal represents the timing change of the scanning signal.
- the frequency of the grayscale clock signal refers to the number of grayscale clock signals when the display panel displays a frame of image.
- the computer device 10 generates the grayscale clock signal according to the frame refresh rate in the local dimming data, so that the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data, in other words, the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data.
- the frame refresh rate of the display panel is matched, thereby avoiding the mismatch between the frequency of the gray scale clock signal and the frame refresh rate of the display panel from affecting the display effect.
- matching the frequency of the grayscale clock signal with the frame refresh rate in the local dimming data means that the frequency of the grayscale clock signal changes with the change of the frame refresh rate in the local dimming data, so that: the display panel starts from the first When the first refresh rate is switched to the second refresh rate, the frequency of the gray-scale clock signal becomes higher, so that when the display panel uses the second refresh rate to display a frame of image, the gray-scale clock signal corresponding to the image is within the frame duration of the image.
- the frequency of the grayscale clock signal becomes lower, so that when the display panel uses the first refresh rate to display a frame of image, the image The corresponding grayscale clock signal will not run out earlier than the frame duration of the image.
- step S200 may be executed by the single-chip microcomputer chip 14 in the computer device 10 . That is, the single-chip microcomputer chip 14 generates a grayscale clock signal according to the frame refresh rate in the local dimming data, and the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data.
- step S200 may include the following steps S210 and S220:
- Step S210 the computer device 10 determines the target frequency by the following formula according to the frame refresh rate in the local dimming data
- GCLK Rate is the target frequency.
- P is the number of grayscale clock signals when the display panel displays a frame of image, and the specific value of P is determined by the hardware characteristics of the computer device 10 .
- the computer device 10 includes the timing control chip 12 , the single-chip microcomputer chip 14 and the LED driver chip 16 as described above, the specific value of P is determined by the characteristics of the LED driver chip 16 .
- P X ⁇ N, where X is the number of rows of backlight areas 22 ; N is the number of grayscale clock signals required to drive a row of backlight areas 22 .
- Frame rate is the frame refresh rate in the local dimming data, and the reciprocal of Frame rate is the frame duration of the display panel at the current frame refresh rate.
- Dummy time is the blank time when the display panel displays a frame of images, and the specific value of Dummy time is determined by the hardware characteristics of the computer device 10.
- the computer device 10 includes the timing control chip 12, the single-chip microcomputer chip 14 and the light-emitting diode driver chip 16 as described above, the specific value of Dummy time is determined by the characteristics of the light-emitting diode driver chip 16.
- step S220 the computer device 10 generates a gray-scale clock signal whose frequency is the target frequency.
- the computer device 10 can generate a gray scale clock signal with the target frequency.
- the frequency of the grayscale clock signal can be matched with the frame refresh rate in the local dimming data, that is, the frequency of the grayscale clock signal can be matched with the frame refresh rate of the display panel.
- step S300 the computer device 10 generates driving data according to a plurality of brightness data in the local dimming data.
- the driving data refers to data signals for driving the driving circuits in the backlight area 22 . Since the brightness data cannot be directly used to drive the backlight area of the display panel, the computer device 10 may perform format conversion on each of the plurality of brightness data to obtain the driving data.
- the luminance data may be grayscale values
- the driving data may be binary signals
- the computer device 10 is used to convert each grayscale value into corresponding driving data.
- step S200 may be before step S300, or step S200 may be after step S300, which is not limited here.
- step S300 can also be executed by the single-chip microcomputer chip 14 in the computer device 10 . That is, the single-chip microcomputer chip 14 generates driving data according to a plurality of brightness data in the local dimming data.
- step S400 the computer device 10 drives a plurality of backlight regions 22 according to the grayscale clock signal and driving data.
- the computer device 10 After the computer device 10 obtains the grayscale clock signal and the driving data, it drives the driving circuit of each backlight region 22 according to the grayscale clock signal and the driving data.
- step S400 is performed by the LED driver chip 16 in the computer device 10 . That is, the LED driving chip 16 drives the driving circuit of the backlight area 22 according to the gray scale clock signal and the driving data. Generally, when the LED driver chip 16 is working, it outputs scanning signals and driving signals to the light emitting circuit of the backlight area 22 under the action of the grayscale clock signal and driving data, thereby controlling the multiple backlight areas 22 to emit light one by one.
- the local dimming data generated by the computer device 10 includes the frame refresh rate of the display panel and the brightness data of each backlight area 22 in the plurality of backlight areas 22 .
- the grayscale clock signal is generated according to the frame refresh rate in the local dimming data, so that the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data.
- the driving data is generated based on a plurality of luminance data in the local dimming data. In this way, when multiple backlight regions 22 are driven according to the grayscale clock signal and driving data, the frequency of the grayscale clock signal always matches the frame refresh rate of the display panel regardless of whether the frame refresh rate of the display panel changes, thereby improving the display performance. The display effect of the panel.
- step S100 before step S100 , the following steps S001 and S002 are also included.
- step S001 the computer device 10 acquires image data of an image to be displayed and a frame refresh rate of a display panel.
- Computer device 10 may include a host device.
- the image data of the image to be displayed and the frame refresh rate of the display panel may be output by the host device.
- the host device here may be, for example, a host of a personal computer, or a central processing unit of a mobile terminal.
- the computer device 10 can be connected to the host device, so that when the host device is working, the image data of the image to be displayed output by the host device and the frame refresh rate of the display panel are acquired.
- Step S001 may be executed by the timing control chip 12 in the computer device 10 . That is, the sequence control chip 12 acquires the image data of the image to be displayed and the frame refresh rate of the display panel.
- step S002 the computer device 10 determines brightness data of each backlight area 22 in the plurality of backlight areas 22 according to the image data.
- the computer device 10 After the computer device 10 acquires the image data of the image to be displayed, it determines the brightness data of each backlight area 22 in the plurality of backlight areas 22 according to the image data of the image to be displayed. In some embodiments, assuming that each backlight area 22 of the display panel corresponds to Y pixels, after the computer device 10 obtains the image data of the image to be displayed, for any backlight area 22, the corresponding backlight area in the image data can be obtained The luminance data of 22 Y pixels. In this way, the computer device 10 can calculate the average value of the luminance data of the Y pixels in the backlight area 22 and use it as a reference value of the luminance data of the backlight area 22 .
- the computer device 10 determines the luminance data of this backlight area 22 according to the reference value of the luminance data of this backlight area 22 .
- the brightness data of the backlight area 22 determined by the computer device 10 should be the brightness data closest to the reference value among the plurality of brightness data.
- the computer device 10 may also calculate the weighted value of the luminance data of Y pixels in the backlight area 22 and use it as a reference value of the luminance data of the backlight area 22 .
- Step S002 may be executed by the timing control chip 12 in the computer device 10 . That is, the sequential control chip 12 determines the brightness data of each backlight area 22 in the plurality of backlight areas 22 according to the image data.
- step S003 may also be included.
- step S003 the computer device 10 acquires a frame synchronization signal.
- step S400 may specifically include: the computer device 10 drives the backlight area 22 according to the gray scale clock signal, the frame synchronization signal and the driving data.
- the frame synchronization signal is used to instruct the computer device 10 to drive the backlight area 22 so that the light of the backlight area 22 is synchronized with the image to be displayed.
- the computer device 10 needs to drive the multiple backlight regions 22 of the backlight source 20 to emit light sequentially.
- the backlight source 20 has M backlight areas 22, and when the display panel displays a frame of images, the computer device 10 sequentially drives the first backlight area 22 to emit light, the second backlight area 22 to emit light ... the Mth backlight area 22 glow.
- the frame synchronization signal is used for: when the computer device 10 receives the frame synchronization signal, it drives the first backlight area 22 to emit light according to the frame synchronization signal.
- the grayscale clock signal is used for: when the computer device 10 receives the grayscale clock signal, it sequentially drives the M backlight regions 22 to emit light according to the grayscale clock signal.
- the driving data is used to determine the luminance of each backlight area 22 .
- the display panel displays one frame of image, and during this process, the computer device 10 sequentially drives the plurality of backlight regions 22 to emit light according to the grayscale clock signal and driving data.
- the frame synchronization signal may also be output by the host device.
- the host device when the host device is working, it can output the image data of the image to be displayed, the frame refresh rate of the display panel and the frame synchronization signal to the computer device 10 .
- the computer device 10 executes the above steps S001 and S003, S002, S100, S200, S300 and S400 in sequence.
- step S003 can be executed by the timing control chip 12 in the computer device 10 .
- the timing control chip 12 acquires the frame synchronization signal, it outputs the frame synchronization signal to the single-chip microcomputer chip 14 .
- the single-chip microcomputer chip 14 obtains the frame synchronization signal, it outputs the frame synchronization signal to the LED driver chip 16 to control the LED driver chip 16 to drive multiple backlight areas 22 .
- the local dimming data also includes an index flag.
- step S100 is specifically: the computer device 10 generates local dimming data, and the local dimming data includes an index mark, a frame refresh rate of the display panel, and brightness data of each backlight area 22 in the plurality of backlight areas 22 .
- the index mark is used to mark the beginning of a frame of image.
- step S003 may specifically be: the computer device 10 generates a frame synchronization signal according to the index mark in the local dimming data.
- FIG. 6 is a data structure diagram of a local dimming data provided by the embodiment of the present application.
- the local dimming data may include an index field 62, a frame refresh rate field 64, and a brightness data field 66.
- the frame refresh rate field 64 is located between the index field 62 and the brightness data field 66 .
- the index field 62 includes an index flag
- the frame refresh rate field 64 includes a frame refresh rate
- the brightness data field 66 includes a plurality of brightness data.
- the backlight source 20 may have M backlight regions 22
- the local dimming data includes M brightness data corresponding to the M backlight regions 22 .
- M pieces of luminance data are represented by DATA1, DATA2...DATAM respectively.
- the local dimming data may further include a check field 68 , and the check field 68 is located after the luminance data field 66 .
- the check field 68 contains check data.
- the verification data is used for data verification to protect the integrity of the data.
- step S003 may be executed by the single-chip microcomputer chip 14 in the computer device 10 . That is, after acquiring the local dimming data, the single-chip microcomputer chip 14 generates a frame synchronization signal according to the index mark in the local dimming data.
- FIG. 7 is a schematic diagram of data transmission provided by an embodiment of the present application.
- the backlight source 20 includes M backlight areas 22
- the computer device 10 includes a timing control chip 12 , a single-chip microcomputer chip 14 and a LED driver chip 16 .
- Backlight driving methods include:
- the timing control chip 12 acquires the image data of the image to be displayed output by the host device and the frame refresh rate of the display panel.
- the frame refresh rate of the display panel is the real-time refresh rate of the image to be displayed.
- the images to be displayed include a first frame image, a second frame image and a third frame image.
- the timing control chip 12 acquires the image data and the frame refresh rate of the first frame image output by the host device.
- the timing control chip 12 acquires the image data and the frame refresh rate of the second frame image output by the host device.
- the timing control chip 12 acquires the image data and the frame refresh rate of the third frame image output by the host device.
- the frame refresh rate of the first frame image and the third frame image are the same, and the frame refresh rate of the second frame image is higher than that of the first frame image.
- the timing control chip 12 After the timing control chip 12 acquires the image data of the image to be displayed, it determines the brightness data of each backlight area 22 in the M backlight areas 22 according to the image data of the image to be displayed. Afterwards, the timing control chip 12 generates local dimming data, and the local dimming data includes an index field 62 , a frame refresh rate field 64 , a brightness data field 66 and a check field 68 .
- the index field 62 includes an index flag
- the frame refresh rate field 64 includes the frame refresh rate of the display panel
- the brightness data field 66 includes M pieces of brightness data. Each luminance data is used to determine the light emission luminance of one backlight area 22 .
- the check field 68 contains check data.
- the timing control chip 12 After the timing control chip 12 generates the local dimming data, it outputs the local dimming data to the single-chip microcomputer chip 14 .
- the single-chip microcomputer chip 14 acquires the local dimming data, on the one hand, the single-chip microcomputer chip 14 generates a frame synchronization signal according to the index mark in the local dimming data.
- the single-chip microcomputer chip 14 determines the target frequency through the following formula according to the frame refresh rate in the local dimming data, and generates a gray scale clock signal with the target frequency.
- the sum of time A and time B is the blank time Dummy time. It can be seen from the figure that when the image to be displayed is switched from the first frame image to the second frame image, as the frame refresh rate increases, the frame duration becomes shorter, and the frequency of the grayscale clock signal also becomes higher, so, that is The frequency of the grayscale clock signal can be matched to the frame refresh rate in the local dimming data, ie the frequency of the grayscale clock signal is matched to the frame refresh rate of the display panel.
- the single-chip microcomputer chip 14 performs format conversion on the M brightness data in the local dimming data to generate driving data.
- the single-chip microcomputer chip 14 After the single-chip microcomputer chip 14 generates the frame synchronization signal, gray-scale clock signal and driving data, it outputs the frame synchronization signal, gray-scale clock signal and driving data to the LED driver chip 16 for controlling the LED driver chip 16 to work.
- the LED driver chip 16 When the LED driver chip 16 is working, it sequentially drives M backlight regions 22 to emit light, and the luminance of each backlight region 22 corresponds to a brightness data.
- the local dimming data includes the frame refresh rate of the display panel and the brightness data of each backlight area 22 in the plurality of backlight areas 22 .
- the grayscale clock signal is generated according to the frame refresh rate in the local dimming data, so that the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data.
- the driving data is generated based on a plurality of luminance data in the local dimming data. In this way, when multiple backlight regions 22 are driven according to the grayscale clock signal and driving data, the frequency of the grayscale clock signal always matches the frame refresh rate of the display panel regardless of whether the frame refresh rate of the display panel changes, thereby improving the display performance. The display effect of the panel.
- the backlight driving method is also used to obtain the frame synchronization signal, and drive multiple backlight regions 22 according to the frame synchronization signal, so that the light emission of the backlight regions 22 is synchronized with the image to be displayed, and further improves the display effect of the display panel.
- FIG. 8 is a schematic structural diagram of a backlight driving device 80 provided by an embodiment of the present application.
- the backlight driving device 80 is used for driving a backlight source of a display panel, and the backlight source includes a plurality of backlight regions.
- the backlight driving device 80 includes a first generating module 801 , a second generating module 802 , a third generating module 803 and a driving module 804 .
- the first generation module 801 is configured to generate local dimming data, the local dimming data includes the frame refresh rate of the display panel and the brightness data of each backlight area in the plurality of backlight areas;
- the second generating module 802 is configured to generate a grayscale clock signal according to the frame refresh rate in the local dimming data, and the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data;
- the third generating module 803 is configured to generate driving data according to a plurality of brightness data in the local dimming data
- the driving module 804 is used for driving multiple backlight areas according to the grayscale clock signal and driving data.
- the backlight driving device 80 also includes:
- the first acquisition module is used to acquire the image data of the image to be displayed and the frame refresh rate of the display panel;
- the determination module is used for determining the brightness data of each backlight area in the plurality of backlight areas according to the image data.
- the second generation module 802 includes:
- a determination unit is configured to determine the target frequency according to the frame refresh rate in the local dimming data through the following formula
- GCLK Rate is the target frequency
- P is the number of grayscale clock signals when the display panel displays a frame of image
- Frame rate is the frame refresh rate in the local dimming data
- Dummy time is the blank when the display panel displays a frame of image time
- the generating unit is configured to generate a grayscale clock signal whose frequency is a target frequency.
- the backlight driving device 80 also includes:
- the second obtaining module is used to obtain the frame synchronization signal
- the driving module 804 is used for driving a plurality of backlight areas according to the grayscale clock signal, frame synchronization signal and driving data.
- the local dimming data further includes an index mark; the second acquiring module is configured to generate a frame synchronization signal according to the index mark in the local dimming data.
- the local dimming data includes an index field, a frame refresh rate field and a brightness data field
- the frame refresh rate field is located between the index field and the brightness data field
- the index field contains an index flag
- the frame refresh rate field contains a frame refresh rate field rate
- the luminance data field contains multiple luminance data.
- the local dimming data includes a frame refresh rate of the display panel and brightness data of each backlight area in the plurality of backlight areas.
- the grayscale clock signal is generated according to the frame refresh rate in the local dimming data, so that the frequency of the grayscale clock signal matches the frame refresh rate in the local dimming data.
- the driving data is generated based on a plurality of luminance data in the local dimming data. In this way, when multiple backlight regions are driven according to the grayscale clock signal and driving data, regardless of whether the frame refresh rate of the display panel changes, the frequency of the grayscale clock signal always matches the frame refresh rate of the display panel, thereby improving the performance of the display panel. display effect.
- the backlight driving device 80 is also used to obtain frame synchronization signals, and drive multiple backlight areas according to the frame synchronization signals, so that the light emission of the backlight areas is synchronized with the image to be displayed, and further improves the display effect of the display panel.
- the backlight driving device 80 provided in the above-mentioned embodiment drives multiple backlight areas of the backlight
- the division of the above-mentioned functional modules is used as an example for illustration.
- the above-mentioned functions can be allocated by Completion of different functional modules means that the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.
- the functional units and modules in the above-mentioned embodiments can be integrated into one processing unit, or each unit can exist separately physically, or two or more units can be integrated into one unit, and the above-mentioned integrated units can use hardware It can also be implemented in the form of software functional units.
- the specific names of each functional unit and module are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the embodiments of the present application.
- the backlight driving device 80 provided in the above embodiment is based on the same idea as the backlight driving method embodiment.
- the method embodiment please refer to the method embodiment, which will not be repeated here.
- FIG. 9 is a schematic structural diagram of a computer device provided by an embodiment of the present application.
- the computer device 90 includes: a processor 901, a memory 902, and a computer program 903 stored in the memory 902 and operable on the processor 901.
- the processor 901 executes the computer program 903, the above embodiments are implemented. Steps in a backlight driving method.
- Computer device 90 may be a general purpose computer device or a special purpose computer device.
- the computer device 90 can be a desktop computer, a portable computer, a network server, a palmtop computer, a mobile phone, a tablet computer, a wireless terminal device, a communication device or an embedded device, and the embodiment of the present application does not limit the type of the computer device 90 .
- FIG. 90 is only an example of the computer device 90, and does not constitute a limitation to the computer device 90. It may include more or less components than those shown in the illustration, or combine certain components, or different components. , for example, may also include input and output devices, network access devices, and the like.
- the processor 901 can be a central processing unit (Central Processing Unit, CPU), and the processor 901 can also be other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC) , Off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
- a general purpose processor may be a microprocessor or any conventional processor.
- the memory 902 may be an internal storage unit of the computer device 90 in some embodiments, such as a hard disk or a memory of the computer device 90 .
- Memory 902 also can be the external storage device of computer equipment 90 in other embodiments, such as the plug-in type hard disk equipped on computer equipment 90, smart memory card (Smart Media Card, SMC), safe digital (Secure Digital, SD) card, flash memory card (Flash Card), etc.
- the memory 902 may also include both an internal storage unit of the computer device 90 and an external storage device.
- the memory 902 is used to store operating systems, application programs, boot loaders (BootLoader), data, and other programs, such as program codes of computer programs.
- the memory 902 can also be used to temporarily store data that has been output or will be output.
- the embodiment of the present application also provides a computer device, the computer device includes: at least one processor, a memory, and a computer program stored in the memory and operable on the at least one processor, and the processor executes the computer program implement the steps in any of the above method embodiments.
- the embodiment of the present application also provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the foregoing method embodiments can be implemented.
- the embodiments of the present application provide a computer program product, which, when running on a computer, causes the computer to execute the steps in the above method embodiments.
- the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
- the present application realizes all or part of the processes in the above method embodiments, which can be completed by instructing related hardware through a computer program, and the computer program can be stored in a computer-readable storage medium.
- the computer program includes computer program code
- the computer program code may be in the form of source code, object code, executable file or some intermediate form.
- the computer-readable medium may at least include: any entity or device capable of carrying computer program codes to the photographing device/terminal device, recording medium, computer memory, ROM (Read-Only Memory, read-only memory), RAM (Random Access Memory , Random Access Memory), CD-ROM (Compact Disc Read-Only Memory, CD-ROM), magnetic tape, floppy disk and optical data storage devices, etc.
- the computer-readable storage medium mentioned in this application may be a non-volatile storage medium, in other words, may be a non-transitory storage medium.
- the disclosed apparatus/computer equipment and methods can be implemented in other ways.
- the device/computer device embodiments described above are only illustrative, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components May be combined or may be integrated into another system, or some features may be omitted, or not implemented.
- the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
- a unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
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Abstract
Description
Claims (17)
- 一种背光驱动方法,用于驱动显示面板的背光源,所述背光源包括多个背光区,其中,所述方法包括:生成局部调光数据,所述局部调光数据包括所述显示面板的帧刷新率和所述多个背光区中每个背光区的亮度数据;根据所述局部调光数据中的帧刷新率生成灰阶时钟信号,所述灰阶时钟信号的频率与所述局部调光数据中的帧刷新率匹配;根据所述局部调光数据中的多个亮度数据生成驱动数据;根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区。
- 如权利要求1所述的方法,其中,所述生成局部调光数据之前,还包括:获取待显示图像的图像数据以及所述显示面板的帧刷新率;根据所述图像数据确定所述多个背光区中每个背光区的亮度数据。
- 如权利要求1所述的方法,其中,所述根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区之前,还包括:获取帧同步信号;所述根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区,包括:根据所述灰阶时钟信号、所述帧同步信号和所述驱动数据驱动所述多个背光区。
- 如权利要求4所述的方法,其中,所述局部调光数据还包括索引标志,所述获取帧同步信号,包括:根据所述局部调光数据中的索引标志生成所述帧同步信号。
- 如权利要求5所述的方法,其中,所述局部调光数据包括索引字段、帧刷新率字段和亮度数据字段,所述帧刷新率字段位于所述索引字段与所述亮度数据字段之间,所述索引字段包含有所述索引标志,所述帧刷新率字段包含有所述帧刷新率,所述亮度数据字段包含有所述多个亮度数据。
- 如权利要求2所述的方法,其中,所述根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区之前,还包括:获取帧同步信号;所述根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区,包括:根据所述灰阶时钟信号、所述帧同步信号和所述驱动数据驱动所述多个背光区。
- 如权利要求3所述的方法,其中,所述根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区之前,还包括:获取帧同步信号;所述根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区,包括:根据所述灰阶时钟信号、所述帧同步信号和所述驱动数据驱动所述多个背光区。
- 一种背光驱动装置,用于驱动显示面板的背光源,所述背光源包括多个背光区,其中,包括:第一生成模块,用于生成局部调光数据,所述局部调光数据包括所述显示面板的帧刷新率和所述多个背光区中每个背光区的亮度数据;第二生成模块,用于根据所述局部调光数据中的帧刷新率生成灰阶时钟信号,所述灰阶时钟信号的频率与所述局部调光数据中的帧刷新率匹配;第三生成模块,用于根据所述局部调光数据中的多个亮度数据生成驱动数据;驱动模块,用于根据所述灰阶时钟信号和所述驱动数据驱动所述多个背光区。
- 如权利要求9所述的背光驱动装置,其中,所述背光驱动装置还包括:第一获取模块,用于获取待显示图像的图像数据以及所述显示面板的帧刷新率;确定模块,用于根据所述图像数据确定所述多个背光区中每个背光区的亮度数据。
- 如权利要求9所述的背光驱动装置,其中,所述背光驱动装置还包括:第二获取模块,用于获取帧同步信号;所述驱动模块用于根据所述灰阶时钟信号、所述帧同步信号和所述驱动数据驱动所述多个背光区。
- 根据权利要求12所述的背光驱动装置,其中,所述局部调光数据还包括索引标志;所述第二获取模块用于根据所述局部调光数据中的索引标志生成所述帧同步信号。
- 根据权利要求13所述的背光驱动装置,其中,所述局部调光数据包括索引字段、帧刷新率字段和亮度数据字段,所述帧刷新率字段位于所述索引字段与所述亮度数据字段之间,所述索引字段包含有所述索引标志,所述帧刷新率字段包含有所述帧刷新率,所述亮度数据字段包含有所述多个亮度数据。
- 如权利要求10所述的背光驱动装置,其中,所述背光驱动装置还包括:第二获取模块,用于获取帧同步信号;所述驱动模块用于根据所述灰阶时钟信号、所述帧同步信号和所述驱动数据驱动所述多个背光区。
- 如权利要求11所述的背光驱动装置,其中,所述背光驱动装置还包括:第二获取模块,用于获取帧同步信号;所述驱动模块用于根据所述灰阶时钟信号、所述帧同步信号和所述驱动数据驱动所述多个背光区。
- 一种计算机设备,其中,所述计算机设备包括存储器、处理器以及存储在所述存储器中并可在所述处理器上运行的计算机程序,所述计算机程序被所述处理器执行时实现如权利要求1至8任意一项所述的背光驱动方法。
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EP22808573.4A EP4365883A1 (en) | 2021-06-28 | 2022-06-14 | Backlight driving method and apparatus, and computer device |
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CN113870804B (zh) * | 2021-10-18 | 2022-05-03 | 北京显芯科技有限公司 | 背光控制系统、方法、设备及存储介质 |
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- 2021-06-28 CN CN202110722030.3A patent/CN113506545B/zh active Active
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2022
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- 2022-06-14 EP EP22808573.4A patent/EP4365883A1/en active Pending
- 2022-06-14 KR KR1020227041990A patent/KR20230005337A/ko not_active Application Discontinuation
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CN1811536A (zh) * | 2006-02-16 | 2006-08-02 | 友达光电股份有限公司 | 液晶显示器及其驱动方法 |
US20100315408A1 (en) * | 2009-06-11 | 2010-12-16 | Samsung Electronics Co., Ltd. | Liquid crystal display and method of driving the same |
CN102890917A (zh) * | 2011-07-20 | 2013-01-23 | 乐金显示有限公司 | 背光驱动装置及其驱动方法、液晶显示设备及其驱动方法 |
CN106097983A (zh) * | 2016-07-27 | 2016-11-09 | 青岛海信电器股份有限公司 | 液晶显示装置中的背光控制方法、装置及液晶显示装置 |
CN109461413A (zh) * | 2019-01-04 | 2019-03-12 | 京东方科技集团股份有限公司 | 一种背光驱动方法、装置及液晶显示装置 |
CN113506545A (zh) * | 2021-06-28 | 2021-10-15 | 惠科股份有限公司 | 背光驱动方法、装置、计算机设备及存储介质 |
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JP2023535256A (ja) | 2023-08-17 |
JP7466709B2 (ja) | 2024-04-12 |
EP4365883A1 (en) | 2024-05-08 |
CN113506545B (zh) | 2022-05-17 |
CN113506545A (zh) | 2021-10-15 |
KR20230005337A (ko) | 2023-01-09 |
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