CN105405428A - Display screen backlight brightness control method and system - Google Patents
Display screen backlight brightness control method and system Download PDFInfo
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- CN105405428A CN105405428A CN201510903795.1A CN201510903795A CN105405428A CN 105405428 A CN105405428 A CN 105405428A CN 201510903795 A CN201510903795 A CN 201510903795A CN 105405428 A CN105405428 A CN 105405428A
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Abstract
The invention provides a display screen backlight brightness control method and a display screen backlight brightness control system. A voltage signal output by a photosensitive module of a display screen can be acquired, and can be converted into a first current signal, which can be input in a current comparison module. The current comparison module also can be used to receive a second current signal, which is input by a current pulse generation module of the display screen, and is cooperated with the current brightness of the ambient light. The current comparison module can be used to compare the signal value of the received first current signal and the signal value of the received second current signal. When the signal value of the first current signal is smaller than the signal value of the second current signal, the signal value of the second current signal can be used as the driving current of the display screen, and the backlight display module of the display screen can be driven for the brightness display. The method and the system provided by the invention are advantageous in that the brightness of the display screen can be changed along with the changing brightness of the ambient light, when the light is darker; the energy consumption of the display screen can be reduced, and at the same time, the intelligence of the backlight display of the display screen can be improved.
Description
Technical field
The present invention relates to intelligent terminal control technology field, the method and system of in particular a kind of display backlight brilliance control.
Background technology
Along with intelligent mobile terminal technology development and constantly bring forth new ideas, the performance requirement that user shows intelligent mobile terminal display screen is also more and more higher, not only requires that display screen shows clear, but also requires that display screen is intelligent to photoinduction.
When environmental light brightness strengthens, the display screen display brightness of intelligent mobile terminal will brighten along with the enhancing of environmental light brightness; When environmental light brightness weakens; the display screen display brightness of intelligent mobile terminal is dimmed; can not only human eye be protected like this, and with regard to power consumption this part, intelligent mobile terminal display screen power consumption in active state can be reduced; can power saving better; and in prior art, when environmental light brightness is dimmed, the display screen display brightness of intelligent mobile terminal is constant; not only the eyes of user are damaged, and.
Therefore, prior art awaits further improvement.
Summary of the invention
In view of above-mentioned weak point of the prior art, the object of the invention is to for user provides a kind of method and system of display backlight brilliance control, the display screen overcoming mobile terminal in prior art can not adjust the defect of backlight display brightness automatically along with the change of external environment.
The technical scheme that technical solution problem of the present invention adopts is as follows:
A method for display backlight brilliance control, wherein, comprising:
The voltage signal that A, the illuminant module obtaining display screen export, converts thereof into the first current signal and exports to current comparing module, and current comparing module also receives the second current signal of the current impulse generation module input of display screen simultaneously; Described second current signal is the driving current signal that simulated environment optimal brightness calculates;
First current signal and the second current signal compare by B, current comparing module, if the first current signal is less than the second current signal, then perform step C; If be greater than, then remain unchanged;
C, control display screen, using the second current signal as drive current, regulate the brightness of the backlight display module of display screen.
The method of described display backlight brilliance control, wherein, described step C also comprises:
C1, when the first current signal is less than the second current signal, then current comparing module export high level signal to being attached thereto the triode unit connect, end described triode unit export voltage signal.
The method of described display backlight brilliance control, wherein, described step C also comprises:
C2, after described current detecting driver module detects the first current signal, export high level driving request signal to central processing unit, ask the drive singal the second current signal being shown module brilliance control as display backlight;
After C3, described central processing unit receive this request, send high level drive singal to triode unit, drive described triode unit to export the second current signal, drive display backlight display module displays.
The method of described display backlight brilliance control, wherein, described step C3 also comprises:
First C31, triode unit export the second current signal and convert it into voltage signal to current/voltage conversion module, again described voltage signal is input to the drive end of power management module, output drive signal, to the backlight display module of display screen, controls its brightness change.
A system for display backlight brilliance control, wherein, comprising:
Signals collecting and acquisition module, for the voltage signal that the illuminant module obtaining display screen exports, convert thereof into the first current signal and export to current comparing module, current comparing module also receives the second current signal of the current impulse generation module input of display screen simultaneously; Described second current signal is the driving current signal that simulated environment optimal brightness calculates;
Signal comparison module, compares the first current signal and the second current signal for utilizing current comparing module;
Driving display module, for being less than the second current signal when the first current signal, then controlling display screen using the signal value of the second current signal as drive current, regulate the brightness of the backlight display module of display screen.
The system of described display backlight brilliance control, wherein, described driving display module also comprises:
First signal cut-off unit, for when the first current signal is less than the second current signal, then current comparing module exports high level signal to being attached thereto the triode unit connect, and ends the voltage signal that described triode unit exports.
The system of described display backlight brilliance control, wherein, described driving display module also comprises:
Secondary signal driving request unit, for after described current detecting driver module detects the first current signal, export high level driving request signal to central processing unit, ask the drive singal of the second current signal as the brilliance control of display backlight display module;
Secondary signal exports driver element, for after described central processing unit receives this request, sends high level drive singal to triode unit, drives described triode unit to export the second current signal, drives display backlight display module displays.
The system of described display backlight brilliance control, wherein, secondary signal exports driver element and comprises:
Drived control subelement, first export the second current signal for utilizing triode unit and convert it into voltage signal to current/voltage conversion module, again described voltage signal is input to the drive end of power management module, output drive signal, to the backlight display module of display screen, controls its brightness change.
Beneficial effect, the invention provides a kind of method and system thereof of display backlight brilliance control, by obtaining 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, current comparing module also receives second current signal suitable with current environmental light brightness of the current impulse generation module input of display screen simultaneously, the signal value of the first current signal that current comparing module is received and the signal value of the second current signal compare, if the signal value of the first current signal is less than the signal value of the second current signal, then control display screen using the signal value of the second current signal as drive current, the backlight of display screen display module is driven to carry out brightness display.The method of the invention and system thereof, overcome environmental light brightness dimmed time, the brightness of display screen of display screen along with the defect of change, while reducing display screen energy consumption, can not improve the intelligent of display backlight display.
Accompanying drawing explanation
Fig. 1 is the method step process flow diagram of a kind of display backlight brilliance control provided by the present invention.
Fig. 2 is the step schematic diagram of the step S1 specific embodiment of the method for the invention.
Fig. 3 is the step schematic diagram of step S2 specific embodiment of the present invention.
Fig. 4 is the step schematic diagram ending the first current signal in step S3 of the present invention.
Fig. 5 is the step schematic diagram of step S3 specific embodiment of the present invention.
Fig. 6 is the system principle structural representation inventing a kind of display backlight brilliance control provided.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only for explaining the present invention, being not intended to limit the present invention.
The invention provides a kind of method of display backlight brilliance control, as shown in Figure 1, described step comprises:
The voltage signal that S1, the illuminant module obtaining display screen export, converts thereof into the first current signal and exports to current comparing module, and current comparing module also receives the second current signal of the current impulse generation module input of display screen simultaneously; Described second current signal is the driving current signal that simulated environment optimal brightness calculates.
Mobile terminal is all generally the change of the illuminant module induced environment light by using display screen, the then light mean change that senses according to illuminant module of the backlight display module of mobile terminal, namely relatively stable in a time period of surround lighting, half-light environment can not be jumped to suddenly by light environment, or jump to suddenly light environment by half-light environment.
Concrete, when surround lighting is dimmed, the sensitivity decrease of the illuminant module induction light of mobile terminal, not positive to the response of half-light, then under the state of surround lighting half-light, the backlight display module brightness of mobile terminal and flat board is constant, arranges current detecting driver module in this step, detect under half-light surround lighting, the first current signal I1 of the illuminant module output voltage signal V1 conversion of mobile terminal.
Shown in composition graphs 2, in this step, first the half-light sensed is changed into voltage signal V1 by the photoelectric conversion unit in this illuminant module by the illuminant module of mobile terminal.Because illuminant module is not positive to the response of half-light, the frequency of half-light reduces then to require illuminant module to sense herein, namely illuminant module senses light in half-light surround lighting, the half-light that illuminant module senses by the photoelectric conversion unit in illuminant module changes into voltage signal V1, and voltage signal V1 is changed into electric current I 1 by electric current and voltage conversion module.
Meanwhile, be also provided with current impulse generation module in display screen, this current impulse generation module sends the second current signal, and current comparing module also receives the second current signal of the current impulse generation module input of display screen; Described second current signal is the driving current signal that simulated environment optimal brightness calculates.Such as: the state that the second current signal I2 simulated environment luminance brightness is moderate, such as surround lighting is the most secretly 0, and the brightest is 100, if the moderate state of environmental light brightness is 50, then the second current signal I2 simulated environment luminance brightness is the state of 50.
S2, current comparing module compare the first current signal and the second current signal, if the first current signal is less than the second current signal, then perform step S3; If be greater than, then remain unchanged.
Shown in composition graphs 3, current impulse generation module produces the second current signal I2, and this electric current second current signal I2 compares as the first current signal I1 changed into by voltage signal V1 with reference to comparison signal and electric current and voltage conversion module.
Respectively the first current signal I1 is input to the negative input of current comparing module, the second current signal I2 is input to the electrode input end of current comparing module.
If current comparing module exports high level signal, then the first current signal I1 is less than the second current signal I2, perform next step, otherwise the ambient brightness value preset when the light intensity experienced during now illuminant module is described is greater than analog computation the second current signal, namely current be in the strong state of light intensity under, therefore can continue use first current signal and drive backlight module adjustment brightness, otherwise perform step S3.
S3, control display screen, using the second current signal as drive current, regulate the brightness of the backlight display module of display screen.
If current comparing module exports high level signal, then the first current signal I1 is less than the second current signal I2, illustrate that the illuminant module of now mobile terminal works under half-light surround lighting, the drive current of the second current signal I2 as mobile terminal display module is set, mobile terminal, under half-light surround lighting, disconnects the voltage signal V1 that illuminant module induction exports.
Composition graphs 4, the step that this step breaks illuminant module output voltage signal comprises:
S31, when the first current signal is less than the second current signal, then current comparing module export high level signal to being attached thereto the triode unit connect, end described triode unit export voltage signal.
Concrete, current comparing module exports high level signal to PNP triode unit, ends the voltage signal V1 that this PNP triode unit exports illuminant module induction half-light.Herein, the voltage signal V1 that PNP triode unit exports is to the drive end of power management module, export intelligent mobile terminal and flat panel backlight display module drive singal, make intelligent mobile terminal and flat panel backlight display module 200 adjust its brightness with the change of surround lighting.
If disconnect PNP triode unit, then the voltage signal V1 of illuminant module induction half-light can not output to the drive end of power management module, then power management module can not export the drive singal of intelligent mobile terminal and flat panel backlight display module, then backlight display module can not be driven with the change of surround lighting to adjust its brightness.
Meanwhile, composition graphs 5, controls to arrange the second current signal and comprises as the step of the drive current of mobile terminal display module:
S32, after described current detecting driver module detects the first current signal, export high level driving request signal to central processing unit, ask the drive singal the second current signal being shown module brilliance control as display backlight;
After S33, described central processing unit receive this request, send high level drive singal to triode unit, drive described triode unit to export the second current signal, drive display backlight display module displays.
Described step S33 also comprises:
First S331, triode unit export the second current signal and convert it into voltage signal to current/voltage conversion module, again described voltage signal is input to the drive end of power management module, output drive signal, to the backlight display module of display screen, controls its brightness change.
After current detecting driver module detects the first current signal I1, export high level driving request signal to central processing unit, request is using the drive singal of the second current signal I2 as mobile terminal display screen backlight display module, drive backlight display module automatically to adjust its brightness under half-light surround lighting, make it adapt to human eye demand to backlight display module brightness under half-light.
Central processing unit is according to the instruction of this high level driving request signal, send high level drive singal to NPN triode unit, drive this NPN triode cell conduction, export driving second current signal I2 to current/voltage conversion module, outputting drive voltage signal V2 is to the drive end of power management module, export the backlight drive signal of intelligent mobile terminal and flat panel backlight display module, make intelligent mobile terminal and flat panel backlight display module adjust its brightness with the change of half-light.
The present invention, under the prerequisite of method disclosing above-mentioned display backlight brilliance control, also discloses a kind of system of display backlight brilliance control, and as shown in Figure 6, described system comprises:
Signals collecting and acquisition module 110, for the voltage signal that the illuminant module obtaining display screen exports, convert thereof into the first current signal and export to current comparing module, current comparing module also receives second current signal suitable with current environmental light brightness of the current impulse generation module input of display screen simultaneously;
Signal comparison module 120, compares the first current signal and the second current signal for utilizing current comparing module;
Drive display module 130, for when the first current signal is less than the second current signal, then control display screen using the second current signal as drive current, regulate the brightness of the backlight display module of display screen.
Described driving display module also comprises:
First signal cut-off unit, for when the first current signal is less than the second current signal, then current comparing module exports high level signal to being attached thereto the triode unit connect, and ends the voltage signal that described triode unit exports.
Described driving display module also comprises:
Secondary signal driving request unit, for after described current detecting driver module detects the first current signal, export high level driving request signal to central processing unit, ask the drive singal of the second current signal as the brilliance control of display backlight display module;
Secondary signal exports driver element, for after described central processing unit receives this request, sends high level drive singal to triode unit, drives described triode unit to export the second current signal, drives display backlight display module displays.
Secondary signal exports driver element and comprises:
Drived control subelement, first export the second current signal for utilizing triode unit and convert it into voltage signal to current/voltage conversion module, again described voltage signal is input to the drive end of power management module, output drive signal, to the backlight display module of display screen, controls its brightness change.
The invention provides a kind of method and system thereof of display backlight brilliance control, by obtaining 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, current comparing module also receives second current signal suitable with current environmental light brightness of the current impulse generation module input of display screen simultaneously, the signal value of the first current signal that current comparing module is received and the signal value of the second current signal compare, if the signal value of the first current signal is less than the signal value of the second current signal, then control display screen using the signal value of the second current signal as drive current, the backlight of display screen display module is driven to carry out brightness display.The method of the invention and system thereof, overcome environmental light brightness dimmed time, the brightness of display screen of display screen along with the defect of change, while reducing display screen energy consumption, can not improve the intelligent of display backlight display.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection domain that all should belong to the claim appended by the present invention.
Claims (8)
1. a method for display backlight brilliance control, is characterized in that, comprising:
The voltage signal that A, the illuminant module obtaining display screen export, converts thereof into the first current signal and exports to current comparing module, and current comparing module also receives the second current signal of the current impulse generation module input of display screen simultaneously; Described second current signal is the driving current signal that simulated environment optimal brightness calculates;
First current signal and the second current signal compare by B, current comparing module, if the first current signal is less than the second current signal, then perform step C; If be greater than, then remain unchanged;
C, control display screen, using the second current signal as drive current, regulate the brightness of the backlight display module of display screen.
2. the method for display backlight brilliance control according to claim 1, is characterized in that, described step C also comprises:
C1, when the first current signal is less than the second current signal, then current comparing module export high level signal to being attached thereto the triode unit connect, end described triode unit export voltage signal.
3. the method for display backlight brilliance control according to claim 1, is characterized in that, described step C also comprises:
C2, after described current detecting driver module detects the first current signal, export high level driving request signal to central processing unit, ask the drive singal the second current signal being shown module brilliance control as display backlight;
After C3, described central processing unit receive this request, send high level drive singal to triode unit, drive described triode unit to export the second current signal, drive display backlight display module displays.
4. the method for display backlight brilliance control according to claim 3, is characterized in that, described step C3 also comprises:
First C31, triode unit export the second current signal and convert it into voltage signal to current/voltage conversion module, again described voltage signal is input to the drive end of power management module, output drive signal, to the backlight display module of display screen, controls its brightness change.
5. a system for display backlight brilliance control, is characterized in that, comprising:
Signals collecting and acquisition module, for the voltage signal that the illuminant module obtaining display screen exports, convert thereof into the first current signal and export to current comparing module, current comparing module also receives the second current signal of the current impulse generation module input of display screen simultaneously; Described second current signal is the driving current signal that simulated environment optimal brightness calculates;
Signal comparison module, compares the first current signal and the second current signal for utilizing current comparing module;
Driving display module, for being less than the second current signal when the first current signal, then controlling display screen using the second current signal as drive current, regulate the brightness of the backlight display module of display screen.
6. the system of display backlight brilliance control according to claim 5, is characterized in that, described driving display module also comprises:
First signal cut-off unit, for being less than the second current signal when the first current signal, then current comparing module exports high level signal to being attached thereto the triode unit connect, and ends the voltage signal that described triode unit exports.
7. the system of display backlight brilliance control according to claim 5, is characterized in that, described driving display module also comprises:
Secondary signal driving request unit, for after described current detecting driver module detects the first current signal, export high level driving request signal to central processing unit, ask the drive singal of the second current signal as the brilliance control of display backlight display module;
Secondary signal exports driver element, for after described central processing unit receives this request, sends high level drive singal to triode unit, drives described triode unit to export the second current signal, drives display backlight display module displays.
8. the system of display backlight brilliance control according to claim 7, is characterized in that, secondary signal exports driver element and comprises:
Drived control subelement, first export the second current signal for utilizing triode unit and convert it into voltage signal to current/voltage conversion module, again described voltage signal is input to the drive end of power management module, output drive signal, to the backlight display module of display screen, controls its brightness change.
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| CN105841807A (en) * | 2016-05-06 | 2016-08-10 | Tcl移动通信科技（宁波）有限公司 | Method and system for enhancing light sensor detection stability and intelligent terminal |
| 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 |
| CN111016798A (en) * | 2019-12-18 | 2020-04-17 | 宁波峰梅视讯电子有限公司 | Temperature control method for stream media rearview mirror |
| 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 |
| CN115113421A (en) * | 2021-03-23 | 2022-09-27 | 广州视源电子科技股份有限公司 | Quantitative evaluation system for local backlight response delay |
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