CN105405428B - A kind of method and system of display backlight brilliance control - Google Patents
A kind of method and system of display backlight brilliance control Download PDFInfo
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- CN105405428B CN105405428B CN201510903795.1A CN201510903795A CN105405428B CN 105405428 B CN105405428 B CN 105405428B CN 201510903795 A CN201510903795 A CN 201510903795A CN 105405428 B CN105405428 B CN 105405428B
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Abstract
The invention provides a kind of method and system of display backlight brilliance control, the voltage signal exported in illuminant module by obtaining display screen, convert thereof into the first current signal and be input to current comparing module, current comparing module also receives the second current signal being adapted with current environmental light brightness of the current impulse generation module input of display screen simultaneously, the signal value for the first current signal that current comparing module is received is compared with the signal value of the second current signal, if the signal value of the first current signal is less than the signal value of the second current signal, then control display screen is used as driving current using the signal value of the second current signal, the backlight display module of driving display screen carries out brightness and shown.The method of the invention and its system, overcome environmental light brightness it is dimmed when, the defects of brightness of display screen of display screen can not be with change, while reducing display screen energy consumption, improve display backlight show it is intelligent.
Description
Technical field
The present invention relates to intelligent terminal control technology field, more particularly to a kind of side of display backlight brilliance control
Method and system.
Background technology
With intelligent mobile terminal technology development and constantly bring forth new ideas, the property that user shows to intelligent mobile terminal display screen
Also more and more higher can be required, display screen is not required nothing more than and shows and clearly, but also to require that display screen is intelligent to photoinduction.
When environmental light brightness strengthens, the display screen display brightness of intelligent mobile terminal will become with the enhancing of environmental light brightness
It is bright；When environmental light brightness weakens, the display screen display brightness of intelligent mobile terminal is dimmed, can not only so protect human eye, and
And for power consumption this part, the power consumption of intelligent mobile terminal display screen in active state can be reduced, can preferably power saving, and
In the prior art, when environmental light brightness is dimmed, the display screen display brightness of intelligent mobile terminal is constant, not only to the eye of user
Eyeball damages, and.
Therefore, prior art is improved up for further.
The content of the invention
In view of above-mentioned weak point of the prior art, it is an object of the invention to provide the user a kind of display backlight
The method and system of brilliance control, overcome the display screen of mobile terminal in the prior art can not be automatically with the change of external environment
And the defects of adjusting backlight display brightness.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of method of display backlight brilliance control, wherein, including：
A, the voltage signal of the illuminant module output of display screen is obtained, the first current signal is converted thereof into and exports to electric current
Comparison module, while current comparing module also receives the second current signal of the current impulse generation module input of display screen；Institute
It is the driving current signal that simulated environment optimal brightness calculates to state the second current signal；
B, current comparing module by the first current signal compared with the second current signal, if the first current signal is less than
Second current signal, then perform step C；If being more than, remain unchanged；
C, control display screen is using the second current signal as driving current, adjust display screen backlight display module it is bright
Degree.
The method of the display backlight brilliance control, wherein, the step C also includes：
C1, when the first current signal is less than the second current signal, then current comparing module export high level signal to
The triode unit being connected, end the voltage signal of three-level pipe unit output.
The method of the display backlight brilliance control, wherein, the step C also includes:
C2, after the current detecting drive module detects the first current signal, export high level driving request signal
To central processing unit, the drive signal using the second current signal as display backlight display module brilliance control is asked；
After C3, the central processing unit receive the request, high level drive signal is sent to three-level pipe unit, drives institute
State three-level pipe unit and export the second current signal, driving display backlight display module is shown.
The method of the display backlight brilliance control, wherein, the step C3 also includes：
C31, triode unit export the second current signal and convert it into voltage letter to Current Voltage conversion module first
Number, then the voltage signal is input to the drive end of power management module, the backlight of output drive signal to display screen is shown
Module, its brightness is controlled to change.
A kind of system of display backlight brilliance control, wherein, including：
Signal acquisition and acquisition module, the voltage signal that the illuminant module for obtaining display screen exports, are converted thereof into
First current signal is exported to current comparing module, while current comparing module also receives the current impulse generation module of display screen
Second current signal of input；Second current signal is the driving current signal that simulated environment optimal brightness calculates；
Signal comparison module, for being compared using current comparing module the first current signal and the second current signal
Compared with；
Display module is driven, for being less than the second current signal when the first current signal, then control display screen is with the second electricity
The signal value of signal is flowed as driving current, adjusts the brightness of the backlight display module of display screen.
The system of the display backlight brilliance control, wherein, the driving display module also includes：
First signal ends unit, for when the first current signal is less than the second current signal, then electric current to compare mould
Block exports high level signal to connected triode unit, ends the voltage signal that the three-level pipe unit exports.
The system of the display backlight brilliance control, wherein, the driving display module also includes：
Secondary signal driving request unit, for after the current detecting drive module detects the first current signal,
High level driving request signal is exported to central processing unit, is asked the second current signal is bright as display backlight display module
Spend the drive signal of control；
Secondary signal output driving unit, driven for after the central processing unit receives the request, sending high level
Dynamic signal drives the three-level pipe unit to export the second current signal, drives display backlight display module to three-level pipe unit
Display.
The system of the display backlight brilliance control, wherein, secondary signal output driving unit includes：
Drive control subelement, mould is converted to Current Voltage for exporting the second current signal first using triode unit
Block converts it into voltage signal, then the voltage signal is input to the drive end of power management module, output drive signal
To the backlight display module of display screen, its brightness is controlled to change.
Beneficial effect, it is aobvious by obtaining the invention provides a kind of method and its system of display backlight brilliance control
The voltage signal exported in the illuminant module of display screen, convert thereof into the first current signal and be input to current comparing module, simultaneously
The current impulse that current comparing module also receives display screen occurs be adapted with current environmental light brightness the second of module input
Current signal, the signal value of the signal value and the second current signal of the first current signal that current comparing module is received enter
Row compares, if the signal value of the first current signal is less than the signal value of the second current signal, control display screen is with the second electric current
The signal value of signal drives the backlight display module of display screen to carry out brightness and shown as driving current.The method of the invention
And its system, overcome environmental light brightness it is dimmed when, the defects of brightness of display screen of display screen can not be with change, reduce aobvious
While display screen energy consumption, improve display backlight show it is intelligent.
Brief description of the drawings
Fig. 1 is a kind of method and step flow chart of display backlight brilliance control provided by the present invention.
Fig. 2 is the step schematic diagram of the step S1 specific embodiments of the method for the invention.
Fig. 3 is the step schematic diagram of step S2 specific embodiments of the present invention.
Fig. 4 is the step schematic diagram for ending the first current signal in step S3 of the present invention.
Fig. 5 is the step schematic diagram of step S3 specific embodiments of the present invention.
Fig. 6 is a kind of system principle structural representation for display backlight brilliance control that invention is provided.
Embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and do not have to
It is of the invention in limiting.
The invention provides a kind of method of display backlight brilliance control, as shown in figure 1, the step includes：
S1, the voltage signal that the illuminant module of display screen exports is obtained, convert thereof into the first current signal and export to electricity
Comparison module is flowed, while current comparing module also receives the second current signal of the current impulse generation module input of display screen；
Second current signal is the driving current signal that simulated environment optimal brightness calculates.
Mobile terminal is typically all the then mobile terminal by using the change of the illuminant module induced environment light of display screen
The light mean change that backlight display module senses according to illuminant module, i.e., it is relatively stable in a period of ambient light,
Half-light environment will not be jumped to suddenly by light environment, or light environment is jumped to by half-light environment suddenly.
Specifically, when ambient light is dimmed, the sensitivity decrease of the illuminant module sensing light of mobile terminal, to the sound of half-light
Should not actively, then in the state of ambient light half-light, the backlight display module brightness of mobile terminal and flat board is constant, in this step
Current detecting drive module is set, detected under half-light ambient light, the illuminant module output voltage signal V1 conversions of mobile terminal
The first current signal I1.
With reference to shown in Fig. 2, in this step the illuminant module of mobile terminal first by the half-light sensed by the illuminant module
Interior photoelectric conversion unit changes into voltage signal V1.Because response of the illuminant module to half-light be not positive, then sense is required herein
Optical module senses that the frequency of half-light reduces, i.e. illuminant module senses light in half-light ambient light, in illuminant module
The photoelectric conversion unit half-light that senses illuminant module change into voltage signal V1, voltage x current conversion module believes voltage
Number V1 changes into electric current I1.
Meanwhile current impulse is additionally provided with display screen module occurs, the current impulse occurs module and sends the second electricity
Signal is flowed, the second current signal that module inputs occurs for the current impulse that current comparing module also receives display screen；Described second
Current signal is the driving current signal that simulated environment optimal brightness calculates.Such as:Second current signal I2 simulated environment light
The moderate state of brightness, for example ambient light is secretly most 0, and most bright is 100, if the moderate state of environmental light brightness is 50, then second
Current signal I2 simulated environments brightness is 50 state.
S2, current comparing module to the first current signal compared with the second current signal, if the first current signal is small
In the second current signal, then step S3 is performed；If being more than, remain unchanged.
With reference to shown in Fig. 3, current impulse occurs module and produces the second current signal I2, and second current signal of electric current I2 makees
It is to refer to comparison signal compared with the first current signal I1 that voltage x current conversion module changes into voltage signal V1.
First current signal I1 is input to the negative input of current comparing module, the second current signal I2 inputs respectively
To the electrode input end of current comparing module.
If current comparing module exports high level signal, the first current signal I1 is less than the second current signal I2, performs
In next step, the luminous intensity for otherwise illustrating to experience in now illuminant module is more than default ring when simulation calculates the second current signal
Border brightness value, that is, be currently at luminous intensity it is strong in the state of, therefore can be continuing with the first current signal driving backlight module
Brightness is adjusted, otherwise performs step S3.
S3, control display screen using the second current signal as driving current, adjust display screen backlight display module it is bright
Degree.
If current comparing module exports high level signal, the first current signal I1 is less than the second current signal I2, explanation
Now the illuminant module of mobile terminal works under half-light ambient light, sets the second current signal I2 to show mould as mobile terminal
The driving current of block, mobile terminal disconnect the voltage signal V1 of illuminant module inductive output under half-light ambient light.
With reference to Fig. 4, the step of this step breaks illuminant module output voltage signal, includes：
S31, when the first current signal is less than the second current signal, then current comparing module export high level signal to
The triode unit being connected, end the voltage signal of three-level pipe unit output.
Specifically, current comparing module exports high level signal to PNP triode unit, end the PNP triode unit
Export the voltage signal V1 of illuminant module sensing half-light.Herein, the voltage signal V1 of PNP triode unit output is to power management
The drive end of module, intelligent mobile terminal and flat panel backlight display module drive signal are exported, makes intelligent mobile terminal and flat board
Backlight display module 200 adjusts its brightness with the change of ambient light.
If disconnecting PNP triode unit, the voltage signal V1 of illuminant module sensing half-light can not be output to power management
The drive end of module, then power management module can not export the drive signal of intelligent mobile terminal and flat panel backlight display module,
Can not then backlight display module be driven to adjust its brightness with the change of ambient light.
Meanwhile with reference to Fig. 5, the step of control sets driving current of second current signal as mobile terminal display module
Including：
S32, after the current detecting drive module detects the first current signal, export high level driving request signal
To central processing unit, the drive signal using the second current signal as display backlight display module brilliance control is asked；
After S33, the central processing unit receive the request, high level drive signal is sent to three-level pipe unit, driving
The three-level pipe unit exports the second current signal, and driving display backlight display module is shown.
The step S33 also includes：
S331, triode unit export the second current signal and convert it into voltage letter to Current Voltage conversion module first
Number, then the voltage signal is input to the drive end of power management module, the backlight of output drive signal to display screen is shown
Module, its brightness is controlled to change.
After current detecting drive module detects the first current signal I1, output high level driving request signal to centre
Device is managed, asks the drive signal using the second current signal I2 as mobile terminal display screen backlight display module, driving backlight shows
Show module its brightness of adjust automatically under half-light ambient light, adapt it to human eye under half-light to the need of backlight display module brightness
Ask.
Central processing unit sends high level drive signal to the poles of NPN tri- according to the instruction of the high level driving request signal
Pipe unit, the NPN triode unit is driven to turn on, output driving the second current signal I2 to Current Voltage conversion module, output
Drive voltage signal V2 exports the backlight of intelligent mobile terminal and flat panel backlight display module to the drive end of power management module
Drive signal, intelligent mobile terminal and flat panel backlight display module is set to adjust its brightness with the change of half-light.
The present invention also discloses a kind of display screen on the premise of the method for above-mentioned display backlight brilliance control is disclosed
The system of backlight illumination control, as shown in fig. 6, the system includes：
Signal acquisition and acquisition module 110, the voltage signal that the illuminant module for obtaining display screen exports, are converted
Exported into the first current signal to current comparing module, while current comparing module also receives the current impulse generation mould of display screen
The second current signal being adapted with current environmental light brightness of block input；
Signal comparison module 120, for being carried out using current comparing module to the first current signal and the second current signal
Compare；
Display module 130 is driven, for when the first current signal is less than the second current signal, then control display screen is with the
Two current signals adjust the brightness of the backlight display module of display screen as driving current.
The driving display module also includes：
First signal ends unit, for when the first current signal is less than the second current signal, then current comparing module
High level signal is exported to connected triode unit, ends the voltage signal that the three-level pipe unit exports.
The driving display module also includes：
Secondary signal driving request unit, for after the current detecting drive module detects the first current signal,
High level driving request signal is exported to central processing unit, is asked the second current signal is bright as display backlight display module
Spend the drive signal of control；
Secondary signal output driving unit, driven for after the central processing unit receives the request, sending high level
Dynamic signal drives the three-level pipe unit to export the second current signal, drives display backlight display module to three-level pipe unit
Display.
Secondary signal output driving unit includes：
Drive control subelement, mould is converted to Current Voltage for exporting the second current signal first using triode unit
Block converts it into voltage signal, then the voltage signal is input to the drive end of power management module, output drive signal
To the backlight display module of display screen, its brightness is controlled to change.
The invention provides a kind of method and its system of display backlight brilliance control, by obtaining the photosensitive of display screen
The voltage signal exported in module, convert thereof into the first current signal and be input to current comparing module, while electric current compares mould
The second current signal being adapted with current environmental light brightness that module inputs occurs for the current impulse that block also receives display screen, electricity
The signal value for the first current signal that comparison module is received is flowed compared with the signal value of the second current signal, if the
The signal value of one current signal is less than the signal value of the second current signal, then control display screen is with the signal value of the second current signal
As driving current, drive the backlight display module of display screen to carry out brightness and show.The method of the invention and its system, overcome
When environmental light brightness is dimmed, the defects of brightness of display screen of display screen can not be with change, the same of display screen energy consumption is reduced
When, improve display backlight show it is intelligent.
It is understood that for those of ordinary skills, can be with technique according to the invention scheme and its hair
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect scope.
Claims (6)
- A kind of 1. method of display backlight brilliance control, it is characterised in that including：A, the voltage signal of the illuminant module output of display screen is obtained, the first current signal is converted thereof into and exports and compare to electric current Module, while current comparing module also receives the second current signal of the current impulse generation module input of display screen；Described Two current signals are the driving current signal that simulated environment optimal brightness calculates；B, current comparing module by the first current signal compared with the second current signal, if the first current signal be less than second Current signal, then perform step C；If being more than, remain unchanged；C, control display screen adjusts the brightness of the backlight display module of display screen using the second current signal as driving current；The step C also includes：C1, when the first current signal is less than the second current signal, then current comparing module exports high level signal to phase therewith The triode unit of connection, end the voltage signal of the three-level pipe unit output.
- 2. the method for display backlight brilliance control according to claim 1, it is characterised in that the step C also includes:C2, after the current detecting drive module detects the first current signal, output high level driving request signal in Central processor, ask the drive signal using the second current signal as display backlight display module brilliance control；After C3, the central processing unit receive the request, high level drive signal is sent to three-level pipe unit, driving described three Level pipe unit exports the second current signal, and driving display backlight display module is shown.
- 3. the method for display backlight brilliance control according to claim 2, it is characterised in that the step C3 also includes：C31, triode unit export the second current signal and convert it into voltage signal to Current Voltage conversion module first, then The voltage signal is input to the drive end of power management module, the backlight display module of output drive signal to display screen, Its brightness is controlled to change.
- A kind of 4. system of display backlight brilliance control, it is characterised in that including：Signal acquisition and acquisition module, the voltage signal that the illuminant module for obtaining display screen exports, convert thereof into first Current signal is exported to current comparing module, while current comparing module also receives the current impulse generation module input of display screen The second current signal；Second current signal is the driving current signal that simulated environment optimal brightness calculates；Signal comparison module, for using current comparing module by the first current signal compared with the second current signal；Display module is driven, for being less than the second current signal when the first current signal, then control display screen is believed with the second electric current Number driving current is used as, adjusts the brightness of the backlight display module of display screen；The driving display module also includes：First signal ends unit, and for being less than the second current signal when the first current signal, then current comparing module output is high Level signal ends the voltage signal that the three-level pipe unit exports to connected triode unit.
- 5. the system of display backlight brilliance control according to claim 4, it is characterised in that the driving display module is also Including：Secondary signal driving request unit, for after the current detecting drive module detects the first current signal, exporting High level driving request signal is asked using the second current signal as display backlight display module brightness control to central processing unit The drive signal of system；Secondary signal output driving unit, for after the central processing unit receives the request, sending high level driving letter Number three-level pipe unit is arrived, drive the three-level pipe unit to export the second current signal, driving display backlight display module is shown.
- 6. the system of display backlight brilliance control according to claim 5, it is characterised in that secondary signal output driving list Member includes：Drive control subelement, will to Current Voltage conversion module for exporting the second current signal first using triode unit It changes into voltage signal, then the voltage signal is input to the drive end of power management module, and output drive signal is to aobvious The backlight display module of display screen, its brightness is controlled to change.
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| CN201510903795.1A CN105405428B (en) | 2015-12-09 | 2015-12-09 | A kind of method and system of display backlight brilliance control |
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| CN107295154A (en) * | 2016-04-05 | 2017-10-24 | 深圳市蓝魔数码科技有限公司 | Mobile phone display brightness control circuit and mobile phone method for controlling display brightness |
| CN105841807B (en) * | 2016-05-06 | 2017-12-12 | Tcl移动通信科技（宁波）有限公司 | A kind of method, system and intelligent terminal for improving optical sensor detection stability |
| CN111016798B (en) * | 2019-12-18 | 2023-05-12 | 宁波华翔视讯电子有限公司 | Temperature control method for streaming media rearview mirror |
| CN115113421B (en) * | 2021-03-23 | 2023-08-15 | 广州视源电子科技股份有限公司 | Quantitative evaluation system for local backlight response delay |
| CN114078448A (en) * | 2021-10-26 | 2022-02-22 | 许继集团有限公司 | Device and method for intelligently adjusting backlight brightness of liquid crystal |
| CN115359752B (en) * | 2022-09-22 | 2024-07-19 | 厦门天马显示科技有限公司 | Display module, display device and driving method |
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| CN101369405A (en) * | 2008-10-13 | 2009-02-18 | 南京Lg新港显示有限公司 | Compensation apparatus for adjusting display brightness and regulation method of the compensation apparatus |
| KR102049783B1 (en) * | 2012-09-28 | 2019-11-28 | 삼성전자 주식회사 | Method and apparatus for controlling screen brightness corresponding to variation of illumination |
| CN103813420A (en) * | 2012-11-07 | 2014-05-21 | 辉达公司 | Tablet electric equipment and current control system thereof |
| CN103996392B (en) * | 2014-05-12 | 2016-04-13 | 合肥鑫晟光电科技有限公司 | A kind of method, circuit and display device adjusting screen intensity |
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