CN109461413A - A kind of backlight driving method, device and liquid crystal display device - Google Patents
A kind of backlight driving method, device and liquid crystal display device Download PDFInfo
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- CN109461413A CN109461413A CN201910008558.7A CN201910008558A CN109461413A CN 109461413 A CN109461413 A CN 109461413A CN 201910008558 A CN201910008558 A CN 201910008558A CN 109461413 A CN109461413 A CN 109461413A
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- backlight
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Disclosed herein is a kind of backlight driving methods, comprising: main control module receives the original synchronization signal and initial backlight driving signal of each frame image data；The original synchronization signal received is carried out N frequency multiplication and generates the first synchronization signal by main control module, backlight area is divided into N number of different subregion, the initial backlight driving signal of N number of backlight subregion is carried on respectively in N frame backlight data, each frame backlight data includes effective driving data of a backlight subregion and the invalid driving data of N-1 backlight subregion；Main control module sends the first synchronization signal of n times and N frame backlight data in an original synchronous signal cycle, to backlight drive module.It is simple and be easy to backlight drive scheme general between different sized liquid crystal panels that the technical solution of this paper provides a kind of design, realizes that liquid crystal display is synchronous with backlight drive.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of backlight driving methods, device and liquid crystal display dress
It sets.
Background technique
With the manufacturing development of liquid crystal display panel, high resolution A R (Augmented Reality, augmented reality skill
Art)/VR (Virtual Reality, virtual reality)/TV (TV)/MNT (display) is to MPRT (Motion Picture
Response Time, dynamic menu response time) it requires to be increasingly stringenter.
By using Mini LED (secondary millimeter light emitting diode) technology, finer backlight may be implemented and adjust, thus
Reduce MPRT.Mini number of LED light sources is numerous, can be divided into thousands of subregions, carries out zonal control.But traditional backlight drive
The output channel of chip is generally 16 channels, in order to realize zonal control, needs a large amount of backlight driving chip.
In the related technology, main control module is exported by unified SPI interface to the output channel of each backlight driving chip
Signal is controlled, since the data of SPI interface are Serial outputs, so different output channels receives respective control by delay
Signal processed, to guarantee the zonal control of backlight drive.
The delay in thousands of a backlight drive channels calculates the design complexities for increasing backlight drive, once it increases or decreases
Subregion, or change zoning arrangement, then it needs to recalculate the delay data in all backlight drive channels, leads to different sized liquid crystals
A large amount of design iterations of panel, waste of manpower, material resources.
Summary of the invention
The technical problem to be solved is that provide a kind of backlight driving method, device and liquid crystal display dress for the embodiment of the present invention
It sets, it is simple and be easy to backlight drive scheme general between different sized liquid crystal panels to be capable of providing a kind of design, realizes liquid
Crystalline substance display is synchronous with backlight drive.
According to a first aspect of the present application, the embodiment of the present invention provides a kind of backlight driving method, comprising: main control module connects
Receive the original synchronization signal and initial backlight driving signal of each frame image data；The original synchronous letter that main control module will receive
Number carry out N frequency multiplication generate the first synchronization signal, backlight area is divided into N number of different subregion, by N number of backlight subregion
Initial backlight driving signal is carried on respectively in N frame backlight data, and each frame backlight data includes having for a backlight subregion
Imitate the invalid driving data of driving data and N-1 backlight subregion；Main control module in an original synchronous signal cycle, to
Backlight drive module sends the first synchronization signal of n times and N frame backlight data.
According to a second aspect of the present application, the embodiment of the present invention provides a kind of backlight drive device, comprising:
Main control module, for receiving the original synchronization signal and initial backlight driving signal of each frame image data；It will connect
The original synchronization signal received carries out N frequency multiplication and generates the first synchronization signal, and backlight area is divided into N number of different subregion,
The initial backlight driving signal of N number of backlight subregion is carried on respectively in N frame backlight data, each frame backlight data includes one
The invalid driving data of effective driving data of a backlight subregion and N-1 backlight subregion；In an original synchronization signal
In period, the first synchronization signal of n times and N frame backlight data are sent to backlight drive module；
Backlight drive module, for receiving the first synchronization signal and backlight data, in the control of first synchronization signal
Under system, the back light of corresponding sub-region is lighted or not lighted according to the backlight data.
According to the third aspect of the application, the embodiment of the present invention provides a kind of liquid crystal display device, including above-mentioned backlight is driven
Dynamic device.
Compared with the relevant technologies, a kind of backlight driving method, device and liquid crystal display device provided in an embodiment of the present invention,
Main control module can send data packet by n times in an original synchronous signal cycle and realize one by N times of vertical synchronizing signal
The transmission of frame initial backlight driving signal is realized so as to avoid a large amount of calculating of delay data with a kind of easier method
Backlight drive overturns synchronous with liquid crystal, is easy between different sized liquid crystal panels using unified backlight drive scheme,
Improve the portability of backlight drive scheme.
Detailed description of the invention
Fig. 1 is a kind of backlight driving method flow chart of the embodiment of the present invention 1；
Fig. 2 is a kind of backlight drive device schematic diagram of the embodiment of the present invention 2；
Fig. 3 is a kind of liquid crystal display device schematic diagram of the embodiment of the present invention 3；
Fig. 4 is the backlight drive device schematic diagram of example 1 of the present invention；
Fig. 5 is the LED driver' s timing figure of example 1 of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Embodiment 1
As shown in Figure 1, the embodiment of the invention provides a kind of backlight driving methods, comprising:
Step S110: main control module receives the original synchronization signal and initial backlight driving signal of each frame image data；
Step S120: the original synchronization signal received is carried out N frequency multiplication and generates the first synchronization signal by main control module, will be carried on the back
Light region division is N number of different subregion, and the initial backlight driving signal of N number of backlight subregion is carried on N frame back respectively
In light data, each frame backlight data includes effective driving data of a backlight subregion and the nothing of N-1 backlight subregion
Imitate driving data；
Step S130, it is same that main control module sends n times first in an original synchronous signal cycle, to backlight drive module
Walk signal and N frame backlight data；
In above embodiment, main control module, can be in an original synchronous signal cycle by N times of vertical synchronizing signal
The transmission that data packet realizes a frame initial backlight driving signal is sent by n times, that is, main control module is by improving output interface
Signaling rate, at the same time in N times of data transfers data, so as to avoid the big meter of delay data
Calculate, with a kind of easier method realize backlight drive overturn with liquid crystal it is synchronous.
In one embodiment, the invalid driving data is for making backlight drive module not light corresponding sub-region
Back light；Effective driving data is for making backlight drive module light correspondence according to the numerical value of initial backlight driving signal
The back light of subregion；
In one embodiment, the main control module sends the first synchronization signal of n times and N frame to backlight drive module
Backlight data, comprising: the main control module sends the synchronous letter of n times first to backlight drive module by serial peripheral equipment interface SPI
Number and N frame backlight data；
In one embodiment, the back light includes: time millimeter light emitting diode Mini LED or light-emitting diodes
Pipe LED.
Embodiment 2
As shown in Fig. 2, the embodiment of the invention provides a kind of backlight drive devices, comprising:
Main control module 10, for receiving the original synchronization signal and initial backlight driving signal of each frame image data；It will
The original synchronization signal received carries out N frequency multiplication and generates the first synchronization signal, and backlight area is divided into N number of different sub-district
The initial backlight driving signal of N number of backlight subregion is carried in N frame backlight data by domain respectively, each frame backlight data packet
The invalid driving data of effective driving data and N-1 backlight subregion containing backlight subregion；In an original synchronization
In signal period, the first synchronization signal of n times and N frame backlight data are sent to backlight drive module；
Backlight drive module 20, for receiving the first synchronization signal and backlight data, in first synchronization signal
Under control, the back light of corresponding sub-region is lighted or not lighted according to the backlight data；
In one embodiment, the invalid driving data is for making backlight drive module not light corresponding sub-region
Back light；Effective driving data is for making backlight drive module light correspondence according to the numerical value of initial backlight driving signal
The back light of subregion；
In one embodiment, the main control module, for sending n times the to backlight drive module in the following ways
One synchronization signal and N frame backlight data: the synchronous letter of n times first is sent to backlight drive module by serial peripheral equipment interface SPI
Number and N frame backlight data；
In one embodiment, the back light includes: time millimeter light emitting diode Mini LED or light-emitting diodes
Pipe LED.
Embodiment 3
As shown in figure 3, the embodiment of the invention provides a kind of liquid crystal display device, including the backlight in above-described embodiment 2
Driving device.
Example 1
As shown in figure 4, this example provides a kind of backlight drive device, the backlight drive device includes MCU and multiple LED
Driving chip, each LED drive chip drive multiple LED.
As shown in figure 5, IN VSYNC signal and backlight drive that MCU receives each frame and show image by SPI mouthfuls of input
Signal, IN VSYNC are initial synchronization signals, and the effect of the signal is synchronous MCU and its input signal, each IN
The control signal that all LED in a frame are had after VSYNC is sent into MCU.One frame is shown that the backlight area of image is divided into 8 by MCU
The initial backlight driving signal of 8 backlight subregions is carried on (such as Fig. 5 in 8 frame backlight datas by a different subregion respectively
In data1, data2 ..., data8), each frame backlight data only include a backlight subregion effective driving data and
The invalid driving data of N-1 backlight subregion, wherein invalid driving data can be indicated with 0.For example, the 1st frame backlight number
It include the LED drive data of the 1st backlight subregion according to (data1), other data all 0 in the backlight data frame.2nd
Frame backlight data (data2) includes the LED drive data of the 2nd backlight subregion, other data in the backlight data frame are complete
Portion is 0.And so on, it include the LED drive data of the 8th backlight subregion, the backlight in the 8th frame backlight data (data2)
Other data all 0 in data frame.
That is, the synchronization signal IN VSYNC of display is carried out frequency multiplication by MCU, OUT VSYNC signal (8 frequency multiplication IN are exported
VSYNC signal).8 frame backlight datas are serially sent within an IN VSYNC period, are sending the i-th frame backlight data (datai)
When, the i-th frame backlight data (datai) in correspond to the data of i-th of backlight subregion be effective, remaining 7 backlight
The data of subregion are 0 (invalid).After LED drive chip receives backlight data, if numerical value is zero, the number is not lighted
Be worth corresponding LED light, if numerical nonzero, according to numerical values recited control LED light driving current, make the brightness of LED light by
Numerical value is controlled.
In above-mentioned example, main control module can be passed through by 8 times of vertical synchronizing signals in an original synchronous signal cycle
8 transmission data packets realize the transmission of a frame initial backlight driving signal, so as to avoid a large amount of calculating of delay data, with one
Kind easier method realizes backlight drive and overturn with liquid crystal synchronous, is easy to use between different sized liquid crystal panels and unite
One backlight drive scheme improves the portability of backlight drive scheme.
It will appreciated by the skilled person that whole or certain steps, system, dress in method disclosed hereinabove
Functional module/unit in setting may be implemented as software, firmware, hardware and its combination appropriate.In hardware embodiment,
Division between the functional module/unit referred in the above description not necessarily corresponds to the division of physical assemblies；For example, one
Physical assemblies can have multiple functions or a function or step and can be executed by several physical assemblies cooperations.Certain objects
Reason component or all physical assemblies may be implemented as by processor, such as central processing unit, digital signal processor or micro process
The software that device executes, is perhaps implemented as hardware or is implemented as integrated circuit, such as specific integrated circuit.Such software
Can be distributed on a computer-readable medium, computer-readable medium may include computer storage medium (or non-transitory be situated between
Matter) and communication media (or fugitive medium).As known to a person of ordinary skill in the art, term computer storage medium includes
In any method or skill for storing information (such as computer readable instructions, data structure, program module or other data)
The volatile and non-volatile implemented in art, removable and nonremovable medium.Computer storage medium includes but is not limited to
RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storages, magnetic
Box, tape, disk storage or other magnetic memory apparatus or it can be used for storing desired information and can be visited by computer
Any other medium asked.In addition, known to a person of ordinary skill in the art be, communication media generally comprises computer-readable
Other numbers in the modulated data signal of instruction, data structure, program module or such as carrier wave or other transmission mechanisms etc
According to, and may include any information delivery media.
It should be noted that the invention may also have other embodiments, without departing substantially from spirit of that invention and its essence
In the case of, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these are corresponding
Change and modification all should fall within the scope of protection of the appended claims of the present invention.
Claims (9)
1. a kind of backlight driving method, comprising:
Main control module receives the original synchronization signal and initial backlight driving signal of each frame image data；
The original synchronization signal received is carried out N frequency multiplication and generates the first synchronization signal by main control module, and backlight area is divided into N
The initial backlight driving signal of N number of backlight subregion is carried in N frame backlight data by a different subregion respectively, each
Frame backlight data includes effective driving data of a backlight subregion and the invalid driving data of N-1 backlight subregion；
Main control module sends the first synchronization signal of n times and N frame in an original synchronous signal cycle, to backlight drive module
Backlight data.
2. the method as described in claim 1, it is characterised in that:
The back light that the invalid driving data is used to that backlight drive module to be made not light corresponding sub-region.
3. the method as described in claim 1, it is characterised in that:
The main control module sends the first synchronization signal of n times and N frame backlight data to backlight drive module, comprising:
The main control module sends the first synchronization signal of n times and N frame back to backlight drive module by serial peripheral equipment interface SPI
Light data.
4. the method as described in claim 1, it is characterised in that:
The back light includes: time millimeter light emitting diode Mini LED or Light-emitting diode LED.
5. a kind of backlight drive device, comprising:
Main control module, for receiving the original synchronization signal and initial backlight driving signal of each frame image data；It will receive
Original synchronization signal carry out N frequency multiplication generate the first synchronization signal, backlight area is divided into N number of different subregion, will be N number of
The initial backlight driving signal of backlight subregion is carried on respectively in N frame backlight data, and each frame backlight data includes a back
The invalid driving data of effective driving data in photon region and N-1 backlight subregion；In an original synchronous signal cycle
It is interior, the first synchronization signal of n times and N frame backlight data are sent to backlight drive module；
Backlight drive module, for receiving the first synchronization signal and backlight data, under the control of first synchronization signal,
The back light of corresponding sub-region is lighted or not lighted according to the backlight data.
6. device as claimed in claim 5, it is characterised in that:
The back light that the invalid driving data is used to that backlight drive module to be made not light corresponding sub-region.
7. device as claimed in claim 5, it is characterised in that:
The main control module, for sending the first synchronization signal of n times and N frame backlight to backlight drive module in the following ways
Data: the first synchronization signal of n times and N frame backlight data are sent to backlight drive module by serial peripheral equipment interface SPI.
8. device as claimed in claim 5, it is characterised in that:
The back light includes: time millimeter light emitting diode Mini LED or Light-emitting diode LED.
9. a kind of liquid crystal display device, including backlight drive device described in any one of claim 5-8.
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| CN201910008558.7A CN109461413B (en) | 2019-01-04 | 2019-01-04 | Backlight driving method and device and liquid crystal display device |
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| CN201910008558.7A CN109461413B (en) | 2019-01-04 | 2019-01-04 | Backlight driving method and device and liquid crystal display device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110136654A (en) * | 2019-04-03 | 2019-08-16 | 深圳康佳电子科技有限公司 | A kind of dimming backlight subregion dimming controlling method, intelligent terminal and storage medium |
| CN112397032A (en) * | 2019-08-19 | 2021-02-23 | Tcl集团股份有限公司 | Dynamic backlight driving module, method and display driving module |
| CN112419987A (en) * | 2020-11-27 | 2021-02-26 | 京东方科技集团股份有限公司 | Backlight driving method and device and display system |
| CN113160760A (en) * | 2021-04-12 | 2021-07-23 | Tcl华星光电技术有限公司 | Time schedule controller, driving method thereof and display device |
| WO2022226717A1 (en) * | 2021-04-26 | 2022-11-03 | 京东方科技集团股份有限公司 | Backlight data transmission method, micro-control unit and local dimming system |
| WO2023273865A1 (en) * | 2021-06-28 | 2023-01-05 | 惠科股份有限公司 | Backlight driving method and apparatus, and computer device |
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| CN109461413B (en) | 2021-01-26 |
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Effective date of registration: 20220118 Address after: 100015 No. 10, Jiuxianqiao Road, Beijing, Chaoyang District Patentee after: BOE TECHNOLOGY GROUP Co.,Ltd. Patentee after: BOE crystal core technology Co., Ltd Address before: 100015 No. 10, Jiuxianqiao Road, Beijing, Chaoyang District Patentee before: BOE TECHNOLOGY GROUP Co.,Ltd. Patentee before: BOE Optoelectronics Technology |