CN111667796A - Driving device and method for direct type backlight module - Google Patents
Driving device and method for direct type backlight module Download PDFInfo
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- CN111667796A CN111667796A CN202010644453.3A CN202010644453A CN111667796A CN 111667796 A CN111667796 A CN 111667796A CN 202010644453 A CN202010644453 A CN 202010644453A CN 111667796 A CN111667796 A CN 111667796A
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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
Abstract
The embodiment of the application discloses a driving device and a driving method of a direct type backlight module. One embodiment of the drive device comprises: a driving processor and a backlight driver including a data selector; a driving processor configured to receive backlight driving data, the backlight driving data being generated by compressing all backlight driving line data corresponding to the second and third areas, respectively, into a line of first data and a line of second data, respectively, by a processor of the liquid crystal display device, and merging with all line data corresponding to the first area, wherein the display area includes the first area, the second area and the third area located above and below the first area, respectively; and the data selector is configured to drive each line of light-emitting elements corresponding to the second area and the third area according to the first data and the second data respectively under the control of the driving processor in the process of scanning the light-emitting elements of the backlight module, and drive each line of light-emitting elements corresponding to the first area according to the corresponding line data.
Description
Technical Field
The present application relates to the field of display technology. And more particularly, to a driving apparatus and method for a direct-type backlight module.
Background
Liquid crystal display devices have become a mainstream product in the current display field. The liquid crystal display device comprises a liquid crystal panel and a backlight module, wherein the liquid crystal panel does not emit light, and the backlight module is required to provide light for the liquid crystal panel.
The backlight module comprises a side-in type backlight module and a direct type backlight module, the side-in type backlight module is always in a normally bright state, backlight power consumption is greatly improved, and the contrast of an image is reduced. The direct type backlight module realizes a Local dimming technology (Local dimming), and the Local dimming technology can change the backlight brightness of different display areas in real time according to the content of a display image, so that the aims of saving the backlight power consumption, improving the contrast of the display image and the like are fulfilled.
The Extended Reality (XR) includes Virtual Reality (VR), Augmented Reality (AR), Mixed Reality (MR), and the like. With the development of the augmented reality technology, the augmented reality liquid crystal display device develops towards a High pixel density (PPI, pixel Per inc) and a High frequency frame direction, and a local dimming technology and the like are also applied to realize better High Dynamic illumination rendering (HDR) and give a better experience to a user. However, the combination of high PPI and high frame rate with local dimming technology puts high demands on the Processing performance and Processing speed of a Graphics Processing Unit (GPU) at the motherboard end of the augmented reality liquid crystal display device for Processing image data and backlight data. Due to the excessive amount of GPU processing data, backlight data may be lost, resulting in a poor display screen.
Disclosure of Invention
An object of the present application is to provide a driving apparatus and method for a direct-type backlight module, so as to solve at least one of the problems in the prior art.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a first aspect of the present application provides a processor of a liquid crystal display device, configured to: compressing all backlight driving line data corresponding to a second area into a line of second area backlight driving line data, compressing all backlight driving line data corresponding to a third area into a line of third area backlight driving line data, and combining all backlight driving line data corresponding to the first area into backlight driving data, wherein a display area of the liquid crystal display device comprises the first area, the second area positioned above the first area and the third area positioned below the first area.
In one possible implementation, the processor is further configured to: and acquiring the position of a human eye gaze point, and adjusting the position of the first area according to the position of the human eye gaze point.
A second aspect of the present application provides a driving apparatus for a direct-type backlight module, comprising a driving processor and a backlight driver, wherein the backlight driver comprises a data selector;
the driving processor is configured to receive backlight driving data, the backlight driving data are generated by compressing all backlight driving line data corresponding to a second area into a line of second area backlight driving line data and compressing all backlight driving line data corresponding to a third area into a line of third area backlight driving line data by a processor of the liquid crystal display device, and combining all backlight driving line data corresponding to the first area, wherein the display area of the liquid crystal display device comprises the first area, the second area located above the first area, and the third area located below the first area;
and the data selector is configured to, during line scanning of the light emitting elements of the backlight module, drive, under the control of the drive processor, each line of light emitting elements corresponding to the second area according to the second area backlight driving line data, drive, for each line of light emitting elements corresponding to the first area according to the corresponding backlight driving line data, and drive, for each line of light emitting elements corresponding to the third area according to the third area backlight driving line data.
In one possible implementation, the driving apparatus further includes a plurality of switch modules configured to perform line scanning on the light emitting elements under the control of the driving processor or the backlight driver.
In a possible implementation manner, the backlight driver further includes a random access memory, configured to cache the second area backlight driving line data, all backlight driving line data corresponding to the first area, and the third area backlight driving line data, which are sent to the data selector by the driving processor.
The third aspect of the present application provides a direct type backlight module, which includes a plurality of light emitting elements, and further includes the driving device provided by the second aspect of the present application.
The fourth aspect of the present application provides a liquid crystal display device, comprising a processor as provided in the first aspect of the present application and a direct type backlight module as provided in the third aspect of the present application.
In one possible implementation, the liquid crystal display device is an augmented reality liquid crystal display device.
The fifth aspect of the present application provides a driving method for a direct type backlight module, including:
compressing all backlight driving line data corresponding to a second area into a line of second area backlight driving line data, compressing all backlight driving line data corresponding to a third area into a line of third area backlight driving line data, and combining all backlight driving line data corresponding to the first area into backlight driving data, wherein a display area of the liquid crystal display device comprises the first area, the second area positioned above the first area and the third area positioned below the first area;
and in the process of scanning the light emitting elements of the backlight module, the driving device drives each line of light emitting elements corresponding to the second area according to the backlight driving line data of the second area, drives each line of light emitting elements corresponding to the first area according to the corresponding backlight driving line data, and drives each line of light emitting elements corresponding to the third area according to the backlight driving line data of the third area.
In one possible implementation, the method further includes:
and acquiring the position of a human eye gaze point, and adjusting the position of the first area according to the position of the human eye gaze point.
A sixth aspect of the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements: compressing all backlight driving line data corresponding to a second area into a line of second area backlight driving line data, compressing all backlight driving line data corresponding to a third area into a line of third area backlight driving line data, and combining all backlight driving line data corresponding to the first area into backlight driving data, wherein a display area of the liquid crystal display device comprises the first area, the second area positioned above the first area and the third area positioned below the first area.
The beneficial effect of this application is as follows:
according to the technical scheme, the display area is divided into the high-definition area and the low-definition area, and then differentiated processing is carried out on the backlight driving line data of the high-definition area and the low-definition area, so that the processing amount of the GPU to the backlight data can be reduced on the basis that user experience is not influenced, the data processing efficiency of the GPU is improved, the requirement on the GPU processing performance is reduced, the power consumption is reduced, the transmission amount of the backlight data can be reduced, the occupied bandwidth of the backlight data is saved, and the transmission efficiency is improved. The backlight module is suitable for various liquid crystal display devices adopting the direct type backlight module, in particular to the extended reality liquid crystal display device with high PPI and high frame frequency combined with the local dimming technology.
Drawings
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of an augmented reality liquid crystal display device provided in an embodiment of the present application.
Fig. 2 is a schematic diagram illustrating a driving timing sequence of a direct type backlight module in an augmented reality liquid crystal display device according to an embodiment of the present application.
Fig. 3 shows a schematic diagram of compression and expansion of backlight driving line data.
Fig. 4 shows a schematic structural diagram of a data selector in an augmented reality liquid crystal display device provided by an embodiment of the present application.
Detailed Description
In order to more clearly explain the present application, the present application is further described below with reference to the embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not intended to limit the scope of the present application.
As shown in fig. 1, an embodiment of the present application provides an extended reality liquid crystal display device, such as VR glasses, including a processor and a direct type backlight module, the direct type backlight module includes a plurality of light emitting elements and a driving device, the driving device includes a driving processor and a backlight driver, and the backlight driver includes a data selector (MUX);
the processor is configured to: compressing all backlight driving line data corresponding to an upper low-definition area into a line of upper low-definition area backlight driving line data and compressing all backlight driving line data corresponding to a lower low-definition area into a line of lower low-definition area backlight driving line data under the condition that a display area of the liquid crystal display device is divided into a high-definition area positioned in the middle, an upper low-definition area positioned above the high-definition area and a lower low-definition area positioned below the high-definition area, and merging all backlight driving line data corresponding to the high-definition area into backlight driving data;
the driving processor configured to receive backlight driving data;
and the data selector is configured to drive each row of light-emitting elements corresponding to the upper low-definition area according to the upper low-definition area backlight driving line data, drive each row of light-emitting elements corresponding to the high-definition area according to the corresponding backlight driving line data, and drive each row of light-emitting elements corresponding to the lower low-definition area according to the lower low-definition area backlight driving line data respectively under the control of the driving processor in the process of scanning the light-emitting elements of the backlight module.
As shown in fig. 1, in a specific example, the processor for processing the backlight driving data is a graphic processor GPU of the augmented reality liquid crystal display device, and may also be a central processing unit CPU; the Light Emitting element is a Light Emitting Diode (LED), and the backlight Driver is an LED Driver; the driving processor in the driving device is a Micro Control Unit (MCU).
Continuing with the foregoing example:
suppose that the direct-type backlight module comprises 20 rows of LEDs in total, that is, the backlight driving line Data to be processed by the GPU comprises 20, namely, Data1、Data2、Data3、……、Data20In one display period, the driving device needs to perform line scanning on 20 rows of LEDs with the driving timing shown in fig. 2. Assuming that the division of the display area results in the upper low-definition area for the LEDs in rows 1-5, the high-definition area for the LEDs in rows 6-15, and the lower low-definition area for the LEDs in rows 16-20, as shown in FIG. 2, the graphics processor GPU drives the backlight driving line Data of the LEDs in rows 1-51、Data2、Data3、Data4、Data5Compressed into a row of upper low-definition region backlight driving line DataA1And drives the backlight of the 16 th to 20 th rows of LEDs to the row Data16、Data17、Data18、Data19、Data20Compressed into a line of low-definition region backlight driving line DataA2For the compression of the backlight driving line data of the two low-definition areas, various existing data compression algorithms can be adopted, such as a revolving door compression algorithm, a transform coding compression algorithm, a huffman coding compression algorithm, an LZW compression algorithm, and the like, and are not described herein one by one.
Then, the GPU drives the backlight driving line Data of the upper low-definition areaA1And the lower low-definition area backlight driving line DataA2All backlight driving line Data corresponding to the high definition region6、Data7、Data8、……、Data15Merge into backlight driving Data, set DataBAll backlight driving line Data corresponding to high-definition area6、Data7、Data8、……、Data15The combined backlight driving Data is (Data)A1+DataB+DataA2)。
Thereafter, the graphic processor GPU converts the backlight driving Data (Data)A1+DataB+DataA2) Transmitting to MCU through Serial Peripheral Interface (SPI), the MCU transmits backlight driving Data (Data)A1+DataB+DataA2) Send to the LED driver through SPI to MUX in the control LED driver realizes the regional extension drive of the drive data in a poor light of two low-definition areas and the regional drive line by line of high definition, and specific drive process is:
when scanning to the 1 st line of LEDs, driving the line Data by using the backlight of the upper low-definition areaA1Driving the 1 st row of LEDs; when scanning to the 2 nd line LED, driving the line Data by the backlight of the upper low-definition areaA1Line 2 LEDs are driven, and similarly, line Data is driven by the backlight of the upper low-definition area when the line 3-5 LEDs are scannedA1Driving is carried out;
driving the line Data by using the backlight when scanning to the 6 th line of LEDs6Driving the LEDs in the 6 th row; driving the line Data by using the backlight when scanning to the 7 th line of LEDs7The 7 th line of LEDs is driven, and similarly, the line Data is driven by the corresponding backlight when scanning to the 8 th, 9 th, 10 th, … … th, 15 th line of LEDs8、Data9、Data10、……、Data15Driving is carried out;
when scanning to 16 th line of LEDs, driving line Data by using the backlight of the lower low-definition areaA2Driving the 16 th row of LEDs; when scanning to the 17 th line of LEDs, the line Data is driven by the backlight of the lower low-definition areaA2The 17 th line of LEDs are driven, and similarly, the line Data are driven by the backlight of the lower low-definition area when the 18 th to 20 th lines of LEDs are scannedA2Driving is performed.
Therefore, the augmented reality liquid crystal display device provided by this embodiment divides the display area into the high definition area and the low definition area, and then performs distinctive processing on the backlight driving line data of the high definition area and the low definition area, and can reduce the processing amount of the GPU on the backlight data on the basis of not affecting the user experience, thereby improving the data processing efficiency of the GPU, reducing the requirement on the processing performance of the GPU, reducing the power consumption, and reducing the transmission amount of the backlight data, thereby saving the bandwidth occupied by the transmission of the backlight data, and improving the transmission efficiency. In addition, the backlight driving method adopted by the augmented reality liquid crystal display device provided by the embodiment is also suitable for other liquid crystal display devices adopting a direct type backlight module.
In some embodiments, as shown in fig. 1, the driving device further comprises a plurality of switching modules configured to scan the light emitting elements in rows under the control of the driving processor. Continuing with the foregoing example, the switch module may be a Thin Film Transistor (TFT) disposed on the scan line of each row of LEDs, taking a PMOS Transistor as an example, in fig. 1, a gate G of the PMOS Transistor is connected to an MCU, a source S of the PMOS Transistor is connected to the power module, and a drain D of the PMOS Transistor is connected to each LED in a corresponding row, the MCU controls the gate G of each PMOS Transistor to turn on the PMOS transistors one by one, so as to turn on the LEDs row by row, that is, to scan the rows of LEDs, and at the same time, the MCU controls the MUX to output corresponding backlight line data to drive the LEDs in the time period when the LEDs in each row are turned on, that is, to control the brightness or backlight brightness of the partitioned LEDs. In addition, the switch module can also be controlled by the backlight driver.
In some embodiments, the backlight driver further includes a Random Access Memory (RAM) for caching the upper low-definition region backlight driving line data, all backlight driving line data corresponding to the high-definition region, and the lower low-definition region backlight driving line data sent by the driving processor to the data selector.
Continuing with the previous example, the data selector is a 1-out-of-4 MUX as shown in FIG. 4, the 1-out-of-4 MUX controlling S through the MCU1Terminal and S2Signals of terminals, i.e. from 4 data input terminals D0、D1、D2、D3The input data of one selected port is output through the output terminal Y, D in this example0Backlight driving line Data of upper low-definition area connected into 1-5 lines of LEDsA1，D1Backlight driving line Data connected to LEDs in lines 6-156、Data7、Data8、……、Data15，D2Backlight driving line Data connected to 16-20 th line of LEDs16、Data17、Data18、Data19、Data20，D3It is not used when it is empty.
The 1-out-of-4 MUX realizes the extended driving of backlight driving data of two low-definition areas and the line-by-line driving of high-definition areas as follows:
S1terminal, S2The end and the S end are controlled by a General-purpose input/output (GPIO) of the MCU, and the MUX works when the signal of the S end is 0; when the signal at the S terminal is 1, the MUX is disabled, and the output at the Y terminal is blocked to a low level (thus, all the conventional LED rows of the liquid crystal display device such as non-high PPI can be driven row by row through the additional signal path).
When backlight driving is carried out, the MCU sets the S end of the MUX to be 0 through the GPIO, the MUX starts to work, and meanwhile line scanning is carried out, namely, the 1 st to 20 th lines of LEDs are started row by row:
when the 1 st line of LEDs is turned on, the MCU turns S through the GPIO1S2Set to 00, when the first stage transmission gate TG1、TG3Conducting, first-stage transmission gate TG2、TG4Cut-off, two-stage transmission gate TG5Conducting, two-stage transmission gate TG6Cut off then D0End-accessed upper low-definition area backlight driving line DataA1The LED is output through an output end Y, so that the 1 st line of LEDs are driven, the brightness of each LED in the 1 st line of LEDs is controlled, and then the upper low-definition area in the RAM is used for driving line Data in a backlight modeA1Not clearing; when the 2 nd row LED is turned on, S1S2Backlight driving line Data of upper low-definition region buffered in RAM still set to 00A1Outputting through the output end Y again to drive the 2 nd row of LEDs; similar to the row 2 LEDs, S is when the rows 3-5 LEDs are turned on in sequence1S2Is always set to 00, thereby realizing the backlight driving line Data of the upper low-definition areaA1I.e. an extended drive to the upper low-definition region.
When the 6 th row of LEDs is turned on, the MCU turns S on through the GPIO1S2Set to 01, when the first stage transmission gate TG is1、TG3Cut-off, first-stage transmission gate TG2、TG4Conducting, two-stage transmission gate TG5Conducting, two-stage transmission gate TG6Cut off then D1End-connected backlight driving line Data6The LED is output through an output end Y, and then the 6 th row of LEDs are driven; when the 7 th row LED is turned on, S1S2Is still set to 01, D1End-connected backlight driving line Data7The LED is output through an output end Y to drive a 7 th row of LEDs; similar to the row 7 LEDs, S is when the rows 8-15 LEDs are turned on in sequence1S2Always set to 01, backlight driving line Data8、Data9、Data10、……、Data15And the 8 th to 15 th rows of LEDs are sequentially driven through output of the output end Y, so that the high-definition area is driven line by line.
When the 16 th row of LEDs is turned on, the MCU turns S on through the GPIO1S2Set to 10, at which time the primary transmission gate TG is1、TG3Conducting, first-stage transmission gate TG2、TG4Cut-off, two-stage transmission gate TG5Cut-off, two-stage transmission gate TG6Is turned on, then D2End-accessed lower low-definition area backlight driving line DataA2The 16 th line of LEDs are driven through the output end Y, and then the backlight driving line Data of the lower low-definition area in the RAMA2Not clearing; when the 17 th row of LEDs is turned on, S1S2Still set to 10, lower low-definition region backlight driving line Data buffered in RAMA2Outputting through the output end Y again to drive the 17 th row of LEDs; similar to the row 17 LEDs, S is when the rows 18-20 LEDs are turned on in sequence1S2Is always set to 10, thereby realizing the lower low-definition area backlight driving line DataA2I.e. an extension drive for the lower low-definition region.
In some embodiments, the processor is further configured to: and acquiring the position of a human eye gaze point, and adjusting the position of the high-definition area according to the position of the human eye gaze point. Therefore, when the human eye fixation point is found to be vertically deviated, the display effect is ensured by adaptively adjusting the position of the high-definition area, and the user experience is further ensured. The eye gaze point position can be obtained and sent to the processor by setting an image collector for the eyes of the user, calculating according to various existing gaze point detection algorithms based on the collected eye images, and the like.
Continuing with the previous example, the division results for the initial display area "rows 1-5 LEDs in the upper low definition area, rows 6-15 LEDs in the high definition area, rows 16-20 LEDs in the lower low definition area":
if the GPU determines that the eye gaze point is shifted upward according to the obtained eye gaze point position, the high definition region may also be adjusted upward, for example, the division result is adjusted such that the 1 st to 2 nd rows of LEDs are in the upper low definition region, the 3 rd to 12 th rows of LEDs are in the high definition region, and the 13 th to 20 th rows of LEDs are in the lower low definition region. Even, there may be no upper low-definition region, for example, the division result is adjusted to have the 1 st to 10 th rows of LEDs in the high-definition region and the 11 th to 20 th rows of LEDs in the lower low-definition region, such that the case where only the high-definition region and the lower low-definition region exist may also be driven by the aforementioned backlight driving method, and generally, the high-definition region is driven line by line, and the lower low-definition region is driven by expanding one row of driving data obtained by compression, which is not described herein again.
If the GPU determines that the eye gaze point is shifted downward according to the obtained eye gaze point position, the high definition region may also be adjusted downward, for example, the division result is adjusted such that the LEDs in rows 1 to 7 are in the upper low definition region, the LEDs in rows 8 to 17 are in the high definition region, and the LEDs in rows 18 to 20 are in the lower low definition region.
Another embodiment of the present application provides a method for driving a direct-type backlight module, including:
the method comprises the steps that under the condition that a display area of the liquid crystal display device is divided into a high-definition area positioned in the middle, an upper low-definition area positioned above the high-definition area and a lower low-definition area positioned below the high-definition area, all backlight driving line data corresponding to the upper low-definition area are compressed into upper low-definition area backlight driving line data, all backlight driving line data corresponding to the lower low-definition area are compressed into lower low-definition area backlight driving line data, and the upper low-definition area backlight driving line data and the lower low-definition area backlight driving line data are combined into backlight driving data;
and in the process of scanning the light emitting elements of the backlight module, the driving device drives each line of light emitting elements corresponding to the upper low-definition area according to the backlight driving line data of the upper low-definition area, drives each line of light emitting elements corresponding to the high-definition area according to the corresponding backlight driving line data, and drives each line of light emitting elements corresponding to the lower low-definition area according to the backlight driving line data of the lower low-definition area.
In some embodiments, the driving method provided by this embodiment further includes:
and acquiring the position of a human eye gaze point, and adjusting the position of the high-definition area according to the position of the human eye gaze point.
It should be noted that the driving method provided in this embodiment is similar to the principle and the working flow of the backlight module driving in the augmented reality liquid crystal display device provided in the above embodiment, and the related points can refer to the above description, and are not described herein again.
The processor in the embodiment of the present application may integrate all the backlight driving line data corresponding to the upper low-definition area into one line of upper low-definition area backlight driving line data, compress all the backlight driving line data corresponding to the lower low-definition area into one line of lower low-definition area backlight driving line data, and merge all the backlight driving line data corresponding to the high-definition area into backlight driving data. The processing unit can be implemented in the form of hardware, and can also be implemented in the form of a software functional unit.
The processing unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of a software product, which 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 all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: flash memory, removable hard drive, read only memory, random access memory, magnetic or optical disk, and the like.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is further noted that, in the description of the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It should be understood that the above-mentioned examples are given for the purpose of illustrating the present application clearly and not for the purpose of limiting the same, and that various other modifications and variations of the present invention may be made by those skilled in the art in light of the above teachings, and it is not intended to be exhaustive or to limit the invention to the precise form disclosed.
Claims (11)
1. A processor of a liquid crystal display device, configured to: compressing all backlight driving line data corresponding to a second area into a line of second area backlight driving line data, compressing all backlight driving line data corresponding to a third area into a line of third area backlight driving line data, and combining all backlight driving line data corresponding to the first area into backlight driving data, wherein a display area of the liquid crystal display device comprises the first area, the second area positioned above the first area and the third area positioned below the first area.
2. The processor of claim 1, further configured to: and acquiring the position of a human eye gaze point, and adjusting the position of the first area according to the position of the human eye gaze point.
3. The driving device of the direct type backlight module is characterized by comprising a driving processor and a backlight driver, wherein the backlight driver comprises a data selector;
the driving processor is configured to receive backlight driving data, the backlight driving data are generated by compressing all backlight driving line data corresponding to a second area into a line of second area backlight driving line data and compressing all backlight driving line data corresponding to a third area into a line of third area backlight driving line data by a processor of the liquid crystal display device, and combining all backlight driving line data corresponding to the first area, wherein the display area of the liquid crystal display device comprises the first area, the second area located above the first area, and the third area located below the first area;
and the data selector is configured to, during line scanning of the light emitting elements of the backlight module, drive, under the control of the drive processor, each line of light emitting elements corresponding to the second area according to the second area backlight driving line data, drive, for each line of light emitting elements corresponding to the first area according to the corresponding backlight driving line data, and drive, for each line of light emitting elements corresponding to the third area according to the third area backlight driving line data.
4. The driving apparatus according to claim 3, further comprising a plurality of switching modules configured to scan the light emitting elements in rows under the control of the driving processor or the backlight driver.
5. The driving apparatus as claimed in claim 3, wherein the backlight driver further comprises a random access memory for buffering the second area backlight driving line data, all backlight driving line data corresponding to the first area and the third area backlight driving line data sent by the driving processor to the data selector.
6. A direct type backlight module comprising a plurality of light emitting elements, further comprising a driving device according to any one of claims 3-5.
7. A liquid crystal display device comprising the processor of claim 1 or 2 and the direct type backlight module of claim 6.
8. The liquid crystal display device according to claim 7, wherein the liquid crystal display device is an augmented reality liquid crystal display device.
9. A driving method of a direct type backlight module is characterized by comprising the following steps:
compressing all backlight driving line data corresponding to a second area into a line of second area backlight driving line data, compressing all backlight driving line data corresponding to a third area into a line of third area backlight driving line data, and combining all backlight driving line data corresponding to the first area into backlight driving data, wherein a display area of the liquid crystal display device comprises the first area, the second area positioned above the first area and the third area positioned below the first area;
and in the process of scanning the light emitting elements of the backlight module, the driving device drives each line of light emitting elements corresponding to the second area according to the backlight driving line data of the second area, drives each line of light emitting elements corresponding to the first area according to the corresponding backlight driving line data, and drives each line of light emitting elements corresponding to the third area according to the backlight driving line data of the third area.
10. The driving method according to claim 9, characterized in that the method further comprises:
and acquiring the position of a human eye gaze point, and adjusting the position of the first area according to the position of the human eye gaze point.
11. A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, implementing: compressing all backlight driving line data corresponding to the second area into a line of second area backlight driving line data, compressing all backlight driving line data corresponding to the third area into a line of third area backlight driving line data, and combining all backlight driving line data corresponding to the first area into backlight driving data, wherein the display area of the liquid crystal display device comprises the first area, the second area positioned above the first area and the third area positioned below the first area.
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