CN105679256B - Dynamic adjustment backlight approach and device - Google Patents
Dynamic adjustment backlight approach and device Download PDFInfo
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- CN105679256B CN105679256B CN201510268089.4A CN201510268089A CN105679256B CN 105679256 B CN105679256 B CN 105679256B CN 201510268089 A CN201510268089 A CN 201510268089A CN 105679256 B CN105679256 B CN 105679256B
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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
- G09G3/36—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 using liquid crystals
Abstract
The invention discloses a kind of dynamic adjustment backlight approach, this method includes：After starting up of terminal starts, in the boot stages, acquiescence backlighting parameters are read from data block, and according to the acquiescence backlighting parameters output control signal to light the display screen of terminal；After system kernel start completion, the dynamic backlight initial value of reading terminals from screen parameter configuration files, and according to the dynamic backlight forming initial fields dynamic backlight parameter；The dynamic backlight initial value is related to the acquiescence backlighting parameters；According to the dynamic backlight parameter output control signal of the generation to adjust the backlight of the display screen of terminal.The invention also discloses a kind of dynamic adjustment back lighting device.It can prevent terminal from occurring backlight mutation in start process using the present invention.
Description
Technical field
The present invention relates to lcd technology, more particularly to dynamic adjustment backlight approach and device.
Background technology
With the continuous progress of science and technology, the backlight technology of liquid crystal display device is continuously available development.But whether it is
LCD LCD TVs, or LED liquid crystal television, consumption of the display screen to electric energy have all accounted for exhausted in LCD TV energy consumption
It is most of.Call in response to the green energy conservation emission reduction in global range, also to save certification by TV industry, while also
Ensure the good viewing effect of consumer, each television manufacturer generally employs the design philosophy of dynamic backlight.
The dynamic backlight of TV, typically by controlling PWM, (Pulse Width Modulation, pulse width are adjusted
System) pin dutycycle, carry out the voltage of control display screen, so as to control television backlight it is bright with it is dark.Different television manufacturers, move
State backlight has different algorithm for designs.For the television manufacturer of the complete machine solution provided using scheme business, whole dynamic
The algorithm of backlight uses the PWM initial configuration parameters consistent with driving all in the driving of scheme business.Such Dynamic Backlight Algorithm
The method being present in scheme business driving also can guarantee that dynamic backlight function needed for product, but this method because with specifically not
Same scheme driving combination is too close, causes transplanting difficult, will spend the long period in different schemes every time.
In the prior art, occurred the completely separable design of the driving of the algorithm of dynamic backlight and concrete scheme.But
This occur again one it is new the problem of, that is, the BOOT softwares of scheme business start show LOGO when, first there is provided display screen
Backlight, and the middleware software of television manufacturer is in operation state Backlight Algorithm, set by the initial backlight value used and BOOT
Backlight value differ, be mutated so as to cause the backlight of display screen in start process to occur once.
The above is only used for auxiliary and understands technical scheme, does not represent and recognizes that the above is existing skill
Art.
The content of the invention
It is a primary object of the present invention to provide a kind of dynamic adjustment backlight approach and device, it is intended to the prior art of solution
In, Dynamic Backlight Algorithm and concrete scheme business are driven apart design, in start process, easily cause the technology of backlight mutation
Defect.
To achieve the above object, the present invention provides a kind of dynamic adjustment backlight approach, and this method includes：
After starting up of terminal starts, in the boot stages, acquiescence backlighting parameters are read from data block, and according to the acquiescence backlight
Parameter output control signal is to light the display screen of terminal；
After system kernel start completion, the dynamic backlight initial value of reading terminals from screen parameter configuration files, and according to
The dynamic backlight forming initial fields dynamic backlight parameter；The dynamic backlight initial value is related to the acquiescence backlighting parameters；
According to the dynamic backlight parameter output control signal of the generation to adjust the backlight of the display screen of terminal.
Preferably, after the starting up of terminal starts, in the boot stages, acquiescence backlighting parameters, and root are read from data block
Before the step of according to the acquiescence backlighting parameters output control signal to light the display screen of terminal, this method also includes：
When receiving simultaneously operating instruction, dynamic backlight initial value is generated.
Preferably, it is described receive simultaneously operating instruction when, generate dynamic backlight initial value the step of include：
When receiving simultaneously operating instruction, join from screen and acquiescence backlighting parameters, minimum backlight parameter and most are read in file
Big backlighting parameters；
The dynamic of the terminal is generated according to the acquiescence backlighting parameters, minimum backlight parameter and maximum backlighting parameters of the reading
State backlight initial value；
The dynamic backlight initial value of the generation is stored in screen parameter configuration files.
Preferably, the dynamic backlight initial value is calculated by below equation：
A=(duty-duty_min) * 255/ (duty_max-duty_min)；
Wherein, A represents dynamic backlight initial value, and duty represents acquiescence backlighting parameters, and duty_min represents minimum backlight parameter,
Duty_max represents maximum backlighting parameters.
Preferably, the dynamic backlight parameter output control signal according to the generation is to light the display screen of terminal
After step, this method also includes：
Detect the monochrome information of the display picture of the terminal；
The backlighting parameters according to corresponding to determining the monochrome information of the detection；
The brightness of display screen of terminal is adjusted according to the backlighting parameters of the determination.
In addition, to achieve the above object, the present invention also provides a kind of dynamic adjustment back lighting device, the device includes：
Read module, for after starting up of terminal starts, in the boot stages, acquiescence backlighting parameters to be read from data block,
And for after system kernel start completion, the dynamic backlight initial value of reading terminals from screen parameter configuration files；
PWM voltage conversion control modules, in the boot stages, according to the acquiescence backlighting parameters output control signal with
Light the display screen of terminal；
Backlight drive interface module, for according to the dynamic backlight forming initial fields dynamic backlight parameter；The dynamic backlight
Initial value is related to the acquiescence backlighting parameters；
The PWM voltage conversions control module, it is additionally operable to the dynamic backlight parameter output control signal according to the generation
To adjust the backlight of the display screen of terminal.
Preferably, described device also includes dynamic backlight forming initial fields module, for receive simultaneously operating instruction when,
Generate dynamic backlight initial value.
Preferably, the dynamic backlight forming initial fields module includes：
Reading unit, for when receiving simultaneously operating instruction, joining from screen and acquiescence backlighting parameters, minimum being read in file
Backlighting parameters and maximum backlighting parameters；
Generation unit, given birth to for the acquiescence backlighting parameters according to the reading, minimum backlight parameter and maximum backlighting parameters
Into the dynamic backlight initial value of the terminal；
Storage unit, for the dynamic backlight initial value of the calculating to be stored in screen parameter configuration files.
Preferably, the dynamic backlight initial value is calculated by below equation：
A=(duty-duty_min) * 255/ (duty_max-duty_min)；
Wherein, A represents dynamic backlight initial value, and duty represents acquiescence backlighting parameters, and duty_min represents minimum backlight parameter,
Duty_max represents maximum backlighting parameters.
Preferably, described device also includes：
Detection module, controlled for being exported in PWM voltage conversions control module according to the dynamic backlight parameter of the generation
After signal processed is to light the display screen of terminal, the monochrome information of the display picture of the terminal is detected；
Determining module, for the backlighting parameters according to corresponding to the determination of the monochrome information of the detection；
Adjusting module, for adjusting the brightness of display screen of terminal according to the backlighting parameters of the determination.
The embodiment of the present invention proposes dynamic adjustment backlight approach and device, after being started by starting up of terminal, in boot ranks
Section, reads acquiescence backlighting parameters from data block, and according to the acquiescence backlighting parameters output control signal to light the aobvious of terminal
Display screen；After system kernel start completion, the dynamic backlight initial value of reading terminals from screen parameter configuration files, and it is dynamic according to this
State backlight forming initial fields dynamic backlight parameter；The dynamic backlight initial value is related to the acquiescence backlighting parameters；According to the life
Into dynamic backlight parameter output control signal to adjust the backlight of the display screen of terminal；The dynamic backlight parameter of the generation is with writing from memory
Recognize backlighting parameters to approach, therefore in the dynamic backlight parameter output control signal according to the generation to light the display screen of terminal
When, it can prevent the display screen of the terminal from backlight mutation occur.
Brief description of the drawings
Fig. 1 is the schematic flow sheet for the first embodiment that present invention dynamic adjusts backlight approach；
Fig. 2 is the schematic flow sheet for the second embodiment that present invention dynamic adjusts backlight approach；
Fig. 3 is the schematic flow sheet for the 3rd embodiment that present invention dynamic adjusts backlight approach；
Fig. 4 is the structural representation for the first embodiment that present invention dynamic adjusts back lighting device；
Fig. 5 is the detailed construction schematic diagram of dynamic backlight forming initial fields module in Fig. 4；
Fig. 6 is the structural representation for the second embodiment that present invention dynamic adjusts back lighting device.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
A kind of dynamic adjustment backlight approach of present invention offer, reference picture 1, in one embodiment, the dynamic adjust backlight side
Method includes：
After S10, starting up of terminal start, in the boot stages, acquiescence backlighting parameters are read from data block, and according to the acquiescence
Backlighting parameters output control signal is to light the display screen of terminal.
The terminal is LCD TV or liquid crystal display.In the present embodiment, using the terminal be LCD TV as
Example.
The LCD TV includes some conventional modules, such as includes a upper electric module, it is whole to be responsible for TV for electric module on this
PVR (Personal video recorder, individual video video recording) imprinting under the switch of the power supply of machine, including standby mode
The starting up such as startup, program predetermination viewing, BGM (Background music, background music) upgradings, user's remote-controlled start-up are
By electric module control on this.After upper electric module is to electricity in LCD TV host chipset, liquid crystal television system starts to start, liquid crystal
After TV starts, after the initialization such as some basic DRIVER, IO, interruptions, the boot stages are entered.
In the boot stages, acquiescence backlighting parameters are read from data block, and believe according to the acquiescence backlighting parameters output control
Number to light the display screen of terminal, specifically, also reading the sequential of screen from the data block.Exported according to the acquiescence backlighting parameters
Control signal is included with lighting the step of the display screen of terminal：The acquiescence backlighting parameters are sent to and controlled to PWM voltage conversions
Module, the PWM voltage conversions control module according to the acquiescence backlighting parameters output control signal to backlight, to light the liquid crystal
The display screen of TV.
Due at the boot stages, system file also no initializtion, because file can not be accessed in the boot stages.Therefore exist
In the boot stages, acquiescence backlighting parameters, the acquiescence backlighting parameters and application platform strong correlation, this value can only be read from data block
Excursion it is very big, i.e., in different application platforms, the acquiescence backlighting parameters used are different, in one embodiment, should
It is 35000 to give tacit consent to backlighting parameters.The data block is stored in FLASH subregions.
S20, after system kernel start completion, from screen parameter configuration files in reading terminals dynamic backlight initial value, and
According to the dynamic backlight forming initial fields dynamic backlight parameter；The dynamic backlight initial value is related to the acquiescence backlighting parameters.
After the completion of the boot stages, system kernel starts to start, after system kernel start completion, from screen parameter configuration files
The dynamic backlight initial value of reading terminals.The screen parameter configuration files can be model.ini configuration files.Screen parameter configuration text
Part is stored in FLASH subregions.
Included according to the step of dynamic backlight forming initial fields dynamic backlight parameter：Join from screen in file and read maximum backlight
Parameter and minimum backlight parameter, and dynamic is generated according to the dynamic backlight initial value, maximum backlighting parameters and minimum backlight parameter and carried on the back
Optical parameter, the dynamic backlight parameter B are calculated by below equation and obtained：
B=dynamic backlight initial values * (maximum backlighting parameters-minimum backlight parameter)/255+ minimum backlight parameters.
In one embodiment, the dynamic backlight initial value of the reading is 159, and the maximum backlighting parameters are 50000, the minimum
Backlighting parameters are 10000, and the dynamic backlight parameter for calculating acquisition is 34941.The calculating obtain dynamic backlight parameter 34941 with
The acquiescence backlighting parameters 35000 read in the boot stages are close.
The dynamic backlight initial value is related to the acquiescence backlighting parameters, and the dynamic backlight initial value is according to the acquiescence backlighting parameters meter
Obtain.
Data source in data block joins file in the screen.
S30, according to the dynamic backlight parameter output control signal of the generation to adjust the backlight of the display screen of terminal.
The dynamic backlight parameter of the generation approaches with acquiescence backlighting parameters, therefore in the dynamic backlight parameter according to the generation
Output control signal can prevent the display screen of the terminal from backlight mutation occur to adjust the backlight of the display screen of terminal.
Wrapped according to the dynamic backlight parameter output control signal of the generation with adjusting the step of the backlight of the display screen of terminal
Include：The dynamic backlight parameter is sent to PWM voltage conversion control modules, the PWM voltage conversions control module is according to the dynamic
Backlighting parameters output control signal is to backlight, to adjust the backlight of the display screen of the LCD TV.
Reference picture 2, Fig. 2 are the second embodiment that present invention dynamic adjusts backlight approach.
Based on the first embodiment of above-mentioned dynamic adjustment backlight approach, before step S10, this method also includes：
S40, receive simultaneously operating instruction when, generate dynamic backlight initial value.
Simultaneously operating instruction can operate generation by performing the default reset of factory menu.In this step, connecing
When receiving simultaneously operating instruction, related data is read from the screen ginseng file of the ini/txt forms of terminal, at the beginning of generating dynamic backlight
Value.Screen ginseng file is stored in FLASH subregions.
In one embodiment, the step includes：
S31, receive simultaneously operating instruction when, from screen join file in read acquiescence backlighting parameters, minimum backlight parameter
With maximum backlighting parameters.
Acquiescence backlighting parameters, minimum backlight parameter and maximum backlighting parameters, the acquiescence have been prestored in screen ginseng file
Backlighting parameters, minimum backlight parameter and maximum backlighting parameters are provided previously by by scheme business.Acquiescence backlighting parameters in data block
It is derived from screen ginseng file.
S32, the dynamic of the terminal is generated according to the acquiescence backlighting parameters, minimum backlight parameter and maximum backlighting parameters of the reading
State backlight initial value.
In this step, should according to the generation of the acquiescence backlighting parameters, minimum backlight parameter and maximum backlighting parameters of the reading
The dynamic backlight initial value of terminal, realize by terminal after system kernel start completion, the dynamic backlight initial value and boot of terminal
The acquiescence backlighting parameters that stage lights the display screen of terminal are synchronous, prevent backlight to be mutated.
In one embodiment, the dynamic backlight initial value is calculated by below equation：
A=(duty-duty_min) * 255/ (duty_max-duty_min)；
Wherein, A represents dynamic backlight initial value, and duty represents acquiescence backlighting parameters, and duty_min represents minimum backlight parameter,
Duty_max represents maximum backlighting parameters.
The dynamic backlight initial value in the range of a backlight (such as 0-255, wherein, 0 corresponding most dark backlight, 255 it is corresponding most
Bright backlight), such as when the acquiescence backlighting parameters are 35000, the maximum backlighting parameters are 50000, and the minimum backlight parameter is
When 10000, the dynamic backlight initial value being calculated is 159.
S33, the dynamic backlight initial value of the generation is stored in and shielded in parameter configuration files.
The screen parameter configuration files can be model.ini configuration files, and after system kernel start completion, may have access to should
Shield parameter configuration files.
Reference picture 3, Fig. 3 are the 3rd embodiment that present invention dynamic adjusts backlight approach.
Based on the first embodiment of above-mentioned dynamic adjustment backlight approach, after step S30, this method also includes：
S50, detect the terminal display picture monochrome information.
After being lighted to the display screen of terminal according to dynamic backlight parameter output control signal, the aobvious of the terminal is detected in real time
Show the monochrome information of picture, to carry out dynamic backlight adjustment to the display screen of the terminal.
S60, the backlighting parameters according to corresponding to determining the monochrome information of the detection.
In this step, backlighting parameters corresponding to the monochrome information of the detection can be calculated by Dynamic Backlight Algorithm, one
In embodiment, the step includes：According to the mapping table of default monochrome information and backlighting parameters, the monochrome information of the detection is determined
Corresponding backlighting parameters.
S70, the brightness of display screen according to the backlighting parameters of determination adjustment terminal.
In this step, the backlighting parameters determined according to step S60 adjust the brightness of display screen of terminal, specifically, should
The backlighting parameters of determination are sent to PWM voltage conversion control modules, and the PWM voltage conversions control module is according to the backlight of the determination
Parameter output control signal is to backlight, to adjust the brightness of display screen of terminal.
Reference picture 4, Fig. 4 are the first embodiment that present invention dynamic adjusts back lighting device, and the device includes：
Read module 10, for after starting up of terminal starts, in the boot stages, acquiescence backlight ginseng to be read from data block
Number, and for after system kernel start completion, the dynamic backlight initial value of reading terminals from screen parameter configuration files；
PWM voltage conversions control module 30, in the boot stages, according to the acquiescence backlighting parameters output control signal
To light the display screen of terminal；
Backlight drive interface module 20, for according to the dynamic backlight forming initial fields dynamic backlight parameter；The dynamic backlight
Initial value is related to the acquiescence backlighting parameters；
The PWM voltage conversions control module 30, be additionally operable to according to the dynamic backlight parameter output control signal of the generation with
Adjust the backlight of the display screen of terminal.
The terminal is LCD TV or liquid crystal display.In the present embodiment, using the terminal be LCD TV as
Example.
The LCD TV includes some conventional modules, such as includes a upper electric module, it is whole to be responsible for TV for electric module on this
PVR (Personal video recorder, individual video video recording) imprinting under the switch of the power supply of machine, including standby mode
The starting up such as startup, program predetermination viewing, BGM (Background music, background music) upgradings, user's remote-controlled start-up are
By electric module control on this.After upper electric module is to electricity in LCD TV host chipset, liquid crystal television system starts to start, liquid crystal
After TV starts, after the initialization such as some basic DRIVER, IO, interruptions, the boot stages are entered.
In the boot stages, the read module 10 reads acquiescence backlighting parameters from data block, specifically, also from the data block
The middle sequential for reading screen.
Due at the boot stages, system file also no initializtion, because file can not be accessed in the boot stages.Therefore exist
Boot stages, the read module 10 can only read acquiescence backlighting parameters, the acquiescence backlighting parameters and application platform from data block
Strong correlation, the excursion of this value is very big, i.e., in different application platforms, the acquiescence backlighting parameters used are different, one
In individual embodiment, the acquiescence backlighting parameters are 35000.
The PWM voltage conversions control module 30 is according to the acquiescence backlighting parameters output control signal to light the display of terminal
Screen is accomplished by the following way：The PWM voltage conversions control module 30 is according to the acquiescence backlighting parameters output control signal to the back of the body
Light lamp, to light the display screen of the LCD TV.
After the completion of the boot stages, system kernel starts to start, and after system kernel start completion, the read module 10 is joined from screen
The dynamic backlight initial value of reading terminals in number configuration file.The screen parameter configuration files can be model.ini configuration files.Should
Screen parameter configuration files are stored in FLASH subregions.
The backlight drive interface module 20 includes according to the step of dynamic backlight forming initial fields dynamic backlight parameter：From screen
Maximum backlighting parameters and minimum backlight parameter is read in ginseng file, and according to the dynamic backlight initial value, maximum backlighting parameters and most
Small backlighting parameters generate dynamic backlight parameter, and the dynamic backlight parameter B is calculated by below equation and obtained：
B=dynamic backlight initial values * (maximum backlighting parameters-minimum backlight parameter)/255+ minimum backlight parameters.
In one embodiment, the dynamic backlight initial value of the reading is 159, and the maximum backlighting parameters are 50000, the minimum
Backlighting parameters are 10000, and the dynamic backlight parameter for calculating acquisition is 34941.The calculating obtain dynamic backlight parameter 34941 with
The acquiescence backlighting parameters 35000 read in the boot stages are close.
The dynamic backlight initial value is related to the acquiescence backlighting parameters, and the dynamic backlight initial value is according to the acquiescence backlighting parameters meter
Obtain.
Data source in data block joins file in the screen.
The dynamic backlight parameter of the generation approaches with acquiescence backlighting parameters, therefore the PWM voltage conversions control module 30 exists
According to the dynamic backlight parameter output control signal of the generation to adjust the backlight of the display screen of terminal, the aobvious of the terminal can be prevented
There is backlight mutation in display screen.
Further, the device also includes dynamic backlight forming initial fields module 40, for receiving simultaneously operating instruction
When, generate dynamic backlight initial value.
Simultaneously operating instruction can operate generation by performing the default reset of factory menu.In this step, connecing
When receiving simultaneously operating instruction, related data is read from the screen ginseng file of the ini/txt forms of terminal, at the beginning of generating dynamic backlight
Value.Screen ginseng file is stored in FLASH subregions.
Further, as shown in figure 5, the dynamic backlight forming initial fields module 40 includes：
Reading unit 41, for when receiving simultaneously operating instruction, joining from screen and acquiescence backlighting parameters, most being read in file
Small backlighting parameters and maximum backlighting parameters；
Generation unit 42, given birth to for the acquiescence backlighting parameters according to the reading, minimum backlight parameter and maximum backlighting parameters
Into the dynamic backlight initial value of the terminal；
Storage unit 43, for the dynamic backlight initial value of the calculating to be stored in screen parameter configuration files.
Acquiescence backlighting parameters, minimum backlight parameter and maximum backlighting parameters, the acquiescence have been prestored in screen ginseng file
Backlighting parameters, minimum backlight parameter and maximum backlighting parameters are provided previously by by scheme business.Acquiescence backlighting parameters in data block
It is derived from screen ginseng file.
The generation unit generates the end according to the acquiescence backlighting parameters, minimum backlight parameter and maximum backlighting parameters of the reading
The dynamic backlight initial value at end, realize by terminal after system kernel start completion, the dynamic backlight initial value of terminal and boot ranks
The acquiescence backlighting parameters that section lights the display screen of terminal are synchronous, prevent backlight to be mutated.
In one embodiment, the dynamic backlight initial value is calculated by below equation：
A=(duty-duty_min) * 255/ (duty_max-duty_min)；
Wherein, A represents dynamic backlight initial value, and duty represents acquiescence backlighting parameters, and duty_min represents minimum backlight parameter,
Duty_max represents maximum backlighting parameters.
The dynamic backlight initial value in the range of a backlight (such as 0-255, wherein, 0 corresponding most dark backlight, 255 it is corresponding most
Bright backlight), as the acquiescence backlighting parameters be 35000, the maximum backlighting parameters be 50000, the minimum backlight parameter be 10000
When, the dynamic backlight initial value being calculated is 159.
The screen parameter configuration files can be model.ini configuration files, and after system kernel start completion, may have access to should
Shield parameter configuration files.
Reference picture 6, Fig. 6 are the second embodiment that present invention dynamic adjusts back lighting device.
Based on the first embodiment of above-mentioned dynamic adjustment back lighting device, the device also includes：
Detection module 50, for being exported in PWM voltage conversions control module 30 according to the dynamic backlight parameter of the generation
After control signal is to light the display screen of terminal, the monochrome information of the display picture of the terminal is detected；
Determining module 60, for the backlighting parameters according to corresponding to the determination of the monochrome information of the detection；
Adjusting module 70, for adjusting the brightness of display screen of terminal according to the backlighting parameters of the determination.
After being lighted to the display screen of terminal according to dynamic backlight parameter output control signal, the detection module 50 is examined in real time
The monochrome information of the display picture of the terminal is surveyed, to carry out dynamic backlight adjustment to the display screen of the terminal.
The determining module 60 can calculate backlighting parameters corresponding to the monochrome information of the detection by Dynamic Backlight Algorithm, one
In embodiment, backlighting parameters corresponding to the monochrome information of the detection can be determined in the following manner：According to default monochrome information
With the mapping table of backlighting parameters, backlighting parameters corresponding to the monochrome information of the detection are determined.
The backlighting parameters that the adjusting module 70 determines according to the determining unit adjust the brightness of display screen of terminal, specifically,
By the backlighting parameters output control signal of the determination to backlight, to adjust the brightness of display screen of terminal.
Using above-described embodiment, for the dynamic backlight parameter in PWM voltage conversions control module 30 according to the generation
After output control signal is to light the display screen of terminal, continue to detect the monochrome information of the display picture of the terminal, it is bright according to this
Backlighting parameters corresponding to information determination are spent, further according to the brightness of the display screen of the backlighting parameters adjustment terminal of determination, can be moved in real time
The brightness of the display screen of the adjustment terminal of state, the power consumption of terminal is reduced, reduce the wasting of resources, and cause the aobvious of the display screen of terminal
Show that effect is more preferable.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (6)
1. a kind of dynamic adjustment backlight approach, it is characterised in that this method includes：
When receiving simultaneously operating instruction, join from screen and acquiescence backlighting parameters, minimum backlight parameter and the maximum back of the body are read in file
Optical parameter；The dynamic that terminal is generated according to the acquiescence backlighting parameters, minimum backlight parameter and maximum backlighting parameters of the reading is carried on the back
Light initial value；The dynamic backlight initial value of the generation is stored in screen parameter configuration files；
After starting up of terminal starts, in the boot stages, acquiescence backlighting parameters are read from data block, and according to the acquiescence backlighting parameters
Output control signal is to light the display screen of terminal；
After system kernel start completion, the dynamic backlight initial value of reading terminals from screen parameter configuration files, and it is dynamic according to this
State backlight forming initial fields dynamic backlight parameter；
According to the dynamic backlight parameter output control signal of the generation to adjust the backlight of the display screen of terminal.
2. dynamic adjustment backlight approach as claimed in claim 1, it is characterised in that the dynamic backlight initial value passes through following public affairs
Formula calculates：
A=(duty-duty_min) * 255/ (duty_max-duty_min)；
Wherein, A represents dynamic backlight initial value, and duty represents acquiescence backlighting parameters, and duty_min represents minimum backlight parameter,
Duty_max represents maximum backlighting parameters.
3. dynamic adjustment backlight approach as claimed in claim 1, it is characterised in that the dynamic backlight according to the generation
After the step of parameter output control signal is to light the display screen of terminal, this method also includes：
Detect the monochrome information of the display picture of the terminal；
The backlighting parameters according to corresponding to determining the monochrome information of the detection；
The brightness of display screen of terminal is adjusted according to the backlighting parameters of the determination.
4. a kind of dynamic adjustment back lighting device, it is characterised in that the device includes：
Read module, for after starting up of terminal starts, in the boot stages, acquiescence backlighting parameters being read from data block, and use
In after system kernel start completion, the dynamic backlight initial value of reading terminals from screen parameter configuration files；
PWM voltage conversion control modules, in the boot stages, according to the acquiescence backlighting parameters output control signal to light
The display screen of terminal；
Backlight drive interface module, for according to the dynamic backlight forming initial fields dynamic backlight parameter；
The PWM voltage conversions control module, is additionally operable to according to the dynamic backlight parameter output control signal of the generation to adjust
The backlight of the display screen of whole terminal；
Described device also includes dynamic backlight forming initial fields module, for when receiving simultaneously operating instruction, generation dynamic to be carried on the back
Light initial value；
The dynamic backlight forming initial fields module includes：
Reading unit, for when receiving simultaneously operating instruction, joining from screen and acquiescence backlighting parameters, minimum backlight being read in file
Parameter and maximum backlighting parameters；
Generation unit, institute is generated for the acquiescence backlighting parameters according to the reading, minimum backlight parameter and maximum backlighting parameters
State the dynamic backlight initial value of terminal；
Storage unit, for the dynamic backlight initial value of the generation to be stored in screen parameter configuration files.
5. dynamic adjustment back lighting device as claimed in claim 4, it is characterised in that the dynamic backlight initial value passes through following public affairs
Formula calculates：
A=(duty-duty_min) * 255/ (duty_max-duty_min)；
Wherein, A represents dynamic backlight initial value, and duty represents acquiescence backlighting parameters, and duty_min represents minimum backlight parameter,
Duty_max represents maximum backlighting parameters.
6. dynamic adjustment back lighting device as claimed in claim 4, it is characterised in that described device also includes：
Detection module, for being believed in PWM voltage conversions control module according to the dynamic backlight parameter output control of the generation
After number to light the display screen of terminal, the monochrome information of the display picture of the terminal is detected；
Determining module, for the backlighting parameters according to corresponding to the determination of the monochrome information of the detection；
Adjusting module, for adjusting the brightness of display screen of terminal according to the backlighting parameters of the determination.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510268089.4A CN105679256B (en) | 2015-05-25 | 2015-05-25 | Dynamic adjustment backlight approach and device |
| PCT/CN2015/090241 WO2016187998A1 (en) | 2015-05-25 | 2015-09-22 | Method and device for dynamically adjusting backlight |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510268089.4A CN105679256B (en) | 2015-05-25 | 2015-05-25 | Dynamic adjustment backlight approach and device |
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| CN105679256A CN105679256A (en) | 2016-06-15 |
| CN105679256B true CN105679256B (en) | 2018-03-06 |
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| CN201510268089.4A Active CN105679256B (en) | 2015-05-25 | 2015-05-25 | Dynamic adjustment backlight approach and device |
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| Country | Link |
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| CN (1) | CN105679256B (en) |
| WO (1) | WO2016187998A1 (en) |
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| CN107093408B (en) * | 2017-06-29 | 2019-09-20 | 青岛海信电器股份有限公司 | The control method and device of backlight lightening when smart machine is switched on |
| CN109064999A (en) * | 2018-07-20 | 2018-12-21 | 珠海诚锋电器有限公司 | A kind of picture image parameter regulation means and its device based on screen back light value |
| CN111243532B (en) * | 2020-01-16 | 2022-03-22 | 聚好看科技股份有限公司 | Backlight control method and display device |
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| WO2016187998A1 (en) | 2016-12-01 |
| CN105679256A (en) | 2016-06-15 |
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