CN206774210U - A kind of screen luminance of mobile phone control device - Google Patents
A kind of screen luminance of mobile phone control device Download PDFInfo
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- CN206774210U CN206774210U CN201621446479.2U CN201621446479U CN206774210U CN 206774210 U CN206774210 U CN 206774210U CN 201621446479 U CN201621446479 U CN 201621446479U CN 206774210 U CN206774210 U CN 206774210U
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- constant
- current controller
- light source
- processing module
- mobile phone
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Abstract
A kind of screen luminance of mobile phone control device of the utility model embodiment,Including mobile phone screen light source,Controllable silicon dimmer,Rectification processing module,First constant-current controller processing module,Second constant-current controller processing module,Electrolytic capacitor processing module,3rd constant-current controller processing module,Due to the anode forward current maintained needed for controllable silicon dimmer conducting can be provided by the first constant-current controller processing module,Avoid and switching the problem of switching state sub-screen flashes,And realize that circuit has High Power Factor value,It is easily achieved regulation,And circuit structure is simple,Required cost is relatively low,And the stroboscopic component of mobile phone screen is eliminated by the electrolytic capacitor of electrolytic capacitor processing module,Stroboscopic phenomenon can be avoided,Broaden work input voltage range,And time lengthening of the electrolytic capacitor to light source power supply can be made by the 3rd constant-current controller processing module,Further increase light efficiency intensity.
Description
Technical field
Mobile phone screen technical field is the utility model is related to, in particular, the utility model is related to a kind of mobile phone screen
Brightness controlling device.
Background technology
With the appearance of smart mobile phone, mobile phone screen turns into most important building block in mobile phone, generally, different
Use environment, it is necessary to adjust screen intensity, for example, needing to heighten the bright of mobile phone screen under dim environment as the case may be
When spending, or under strong light, heighten mobile phone brightness in order to which user checks, but adjusting switch mobile phone screen intensity in the prior art
Flicker can be produced, long-term use of unfavorable to user health, how convenient adjusting screen luminance of mobile phone is industry problems faced.
The content of the invention
In view of the above problems, the utility model embodiment provides a kind of Mobile phone screen partly or entirely to solve the above problems
Curtain brightness controlling device, the problem of to avoid switching mobile phone screen flicker under switching state, and it realizes that circuit has high power
Factor, it is easy to accomplish regulation, circuit structure is simple, and required cost is relatively low.
In order to solve the above-mentioned technical problem, the application adopts the following technical scheme that：
According to a kind of screen luminance of mobile phone control device of the utility model embodiment, it includes：
Mobile phone screen light source, rectification processing module, controllable silicon dimmer, the first constant-current controller, the second constant-current controller,
3rd constant-current controller, electrolytic capacitor, commutation diode, the first sampling resistor, the second sampling resistor and the 3rd sampling resistor；
The rectification processing module is connected by the controllable silicon dimmer with external power supply, the rectification processing module
Positive output end connects one end of first constant-current controller and the anode of the commutation diode, the rectification processing module
Negative output end be connected with the other end of first constant-current controller after be grounded, the control terminal of first constant-current controller
A is grounded by the first sampling resistor and the second sampling resistor, and first sampling resistor and second sampling resistor pass through C points
It is connected, the negative electrode of the commutation diode connects one end of the 3rd constant-current controller and first electrolytic capacitor
Positive pole, the other end of the 3rd constant-current controller connect the anode of the mobile phone screen light source, while the 3rd constant current control
The control terminal D of device processed is connected by 3rd resistor with the anode of the mobile phone screen light source, and the negative pole of the electrolytic capacitor connects
Connect the negative electrode of the mobile phone screen light source and one end of second constant-current controller, second constant-current controller it is another
End ground connection, while the control terminal B of second constant-current controller is grounded by the second sampling resistor；
Wherein when the first constant-current controller control terminal A points voltage is more than C point voltages, first constant-current controller
Conducting maintains the controllable silicon dimmer to turn on required anode forward current to provide；Busbar voltage after rectification is less than institute
When stating the conduction voltage drop of light source, the electrolytic capacitor is to the mobile phone screen light source power supply.
Correspondingly, a kind of screen luminance of mobile phone control device of the utility model embodiment, it includes：
Mobile phone screen light source；
Controllable silicon dimmer, for controlling the input current size of external power supply to adjust the brightness of mobile phone screen light source；
Rectification processing module, it is connected by the controllable silicon dimmer with external power supply, for entering to input external power supply
Row rectification；
First constant-current controller processing module, it is connected with the rectification processing module, the controllable silicon is maintained for providing
Anode forward current needed for dimmer conduction；
Second constant-current controller processing module, is connected with the light source, for being handled for the light source and electrolytic capacitor
Module provides constant current driving；
The electrolytic capacitor processing module, its electrolytic capacitor is in parallel with the mobile phone screen light source, for inputting
Busbar voltage be less than mobile phone screen light source conduction voltage drop when, to the mobile phone screen light source power supply；
3rd constant-current controller processing module, it is connected with the mobile phone screen light source and formed simultaneously with electrolytic capacitor again
Connection, for when to the mobile phone screen light source power supply, constant current driving to be provided for the mobile phone screen light source.
According to the screen luminance of mobile phone control device of the utility model embodiment, it includes light source, for providing Mobile phone screen
Curtain light source；Controllable silicon dimmer, for controlling the input current size of external power supply to adjust the brightness of mobile phone screen light source；It is whole
Stream process module, it is connected by the controllable silicon dimmer with external power supply, for carrying out rectification to input external power supply；First
Constant-current controller processing module, it is connected with the rectification processing module, the controllable silicon dimmer conducting institute is maintained for providing
The anode forward current needed；Second constant-current controller processing module, it is connected with the mobile phone screen light source, for for the mobile phone
Light source and electrolytic capacitor processing module provide constant current driving；The electrolytic capacitor processing module, its electrolytic capacitor and institute
State mobile phone screen light source parallel connection, for input busbar voltage be less than mobile phone screen light source module light source conduction voltage drop when,
To the mobile phone screen light source power supply；3rd constant-current controller processing module, it connects again electric with electrolysis with mobile phone screen light source
Container forms parallel connection, for when the electrolytic capacitor is to the mobile phone screen light source power supply, being the mobile phone screen light source
Constant current driving is provided, maintained due to that can be provided by the first constant-current controller processing module needed for the controllable silicon dimmer conducting
Anode forward current, controllable silicon dimmer can be made quickly to start when starting in next cycle, avoid switch switch
The problem of mobile phone screen flashes under state, and because controllable silicon dimmer fast conducting improves the active power of circuit,
I.e. it realizes that circuit has High Power Factor value, it is easy to accomplish regulation, and also circuit structure is simple, and required cost is relatively low；
In addition, the stroboscopic point by mobile phone screen light source is eliminated by the electrolytic capacitor of electrolytic capacitor processing module
Amount, can avoid stroboscopic phenomenon, and broaden work input voltage range, make busbar voltage of the mobile phone screen light source after rectification small
Continue to keep working condition when the conduction voltage drop of mobile phone screen light source, and when electrolytic capacitor processing module gives mobile phone screen light
When source powers, by the 3rd constant-current controller processing module electrolytic capacitor can be made to be kept to the electric current of mobile phone screen light source power supply
It is constant, further increase light efficiency intensity.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments described in the utility model, for those of ordinary skill in the art, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is according to the bus with electrolytic capacitor after rectification in a kind of screen luminance of mobile phone control device of the utility model
Voltage oscillogram；
Fig. 2 is shown according to an a kind of specific embodiment circuit structure of screen luminance of mobile phone control device of the utility model
It is intended to.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe.
With reference to figure 1, the figure is that have electrolytic capacitor after rectification in a kind of screen luminance of mobile phone control device of the utility model
Busbar voltage oscillogram.
As shown, the busbar voltage waveform in the present embodiment after rectification is non-sinusoidal waveform, specifically, can in the present embodiment
Control silicon light modulator turns at the t1 moment, is turned off at the t2 moment, and at the t3 moment in another cycle, controllable silicon dimmer is again
Conducting, such loop cycle goes down, wherein, can be by electrolytic capacitor to mobile phone screen light source in t2 and t3 intervals
（Such as LED light source）Power supply, i.e., in t2 and t3 intervals, mobile phone screen light source（Such as LED light source）It can maintaining lights, here
Repeat no more.
With reference to figure 2, it is a specific embodiment electricity according to a kind of screen luminance of mobile phone control device of the utility model
Line structure schematic diagram.
The present embodiment is applicable the application mode that linear single hop is dimmed without stroboscopic, during specific implementation, leads in the present embodiment
Controllable silicon dimmer control mobile phone screen light-source brightness is crossed, as a specific embodiment, rectification processing module can use rectification
Bridge heap BR1, in addition, being controlled for the ease of input power, power switch is may also include, specifically, the present embodiment is with mobile phone screen
Background light source illustrates exemplified by using LED light source, and the screen luminance of mobile phone control device of the present embodiment mainly includes：
Power switch S0, controllable silicon dimmer BG1, rectifier bridge stack BR1, commutation diode VD1, electrolytic capacitor C1,3
LED constant current controller：LED constant current controller 1（That is the first constant-current controller）, LED constant current controller 2（That is the second current constant control
Device）, LED constant current controller 3（That is the 3rd constant-current controller）；Sampling resistor R1, R2, R3（That is the first sampling resistor, the second sampling
Resistance and the 3rd sampling resistor）, LED light source（LED light source comprises at least a LED lamp bead in practice, as an example, sheet
Such as LED light source is the lamp string for including 3 LED lamp beads in embodiment, can also be the LED lamp bead composition of other quantity in practice
Lamp string, be not specifically limited here）, and the annexation of each element is as follows in physical circuit：
Rectifier bridge stack BR1 is connected by power switch S0 and controllable silicon dimmer BG1 with external power supply, rectifier bridge
One end of heap BR1 positive output ends connection LED constant-current driver 1 and commutation diode VD1 anode, rectifier bridge stack BR1 negatives
Output end is grounded after being connected with the other end of LED constant-current driver 1, and the control terminal A ends of the LED constant-current driver 1 pass through resistance
R1 and R2 ground connection；One end of commutation diode VD1 negative electrode connection LED constant current controller 3, while commutation diode VD1 the moon
Pole connection electrolytic capacitor C1 positive pole；The control terminal D ends of LED constant current controller 3 pass through resistance R3 and LED constant current controller 3
The other end be connected, while the other end of LED constant current controller 3 is connected with the anode of LED light source, negative electrode and the electricity of LED light source
Electrolysis condenser C1 negative pole is connected, while the negative electrode of LED light source is connected with one end of LED constant current controller 2, LED constant current control
The B ends of device 2 are grounded by resistance R2, while the other end of LED constant current controller 2 is also grounded.
The following detailed description of the course of work of the LED adjusting control circuit of the present embodiment：
When power switch closes, within the T1 cycles, regulation controllable silicon dimmer BG1 turns in t1 time triggers, while electricity
Electrolysis condenser C1 is charged by bus, as busbar voltage Vin>VLED light sourceWhen（I.e. busbar voltage is more than the conducting of LED light source
Pressure drop）, LED light source is bright, and electrolytic capacitor C1 persistently charges during this period, and now LED constant current controller 1 detects control terminal A points
Voltage, when A points voltage is less than C point voltages, LED constant current controller 1 turns off, LED constant current controller 2, LED constant-current driver 3
LED light source is driven, controls LED light ource electric current, the electric current for now flowing through LED light source is ILED light source '=Vth/R3, flows through LED light source
Electric current with electrolytic capacitor C1 is ILED light source=Vth/R2；As busbar voltage Vin<VLED light sourceWhen（I.e. busbar voltage is less than LED light
The conduction voltage drop in source）, electrolytic capacitor C1 gives LED light source power supply, the driving LED light source of LED constant-current driver 3, and provides LED light
Electric current needed for source, its electric current are：ILED light source '=Vth/R3（R2 in the present embodiment<R3）, electrolytic capacitor C1 persistently gives LED light source
Electric current needed for offer, until next cycle busbar voltage Vin>VLED light source；
In addition, within the T1 cycles, LED constant current controller 1 detects control terminal A point voltages, when A points voltage is more than C point voltages
When, LED constant current controller 1 turns on, and LED constant current controller 2 turns off, at the t2 moment, controllable silicon dimmer BG1 triggering shut-offs, and LED
Constant-current controller 1 is provided for anode forward current necessary to maintaining controllable silicon dimmer BG1 conductings；, can within the T2 cycles
Controlling silicon light modulator BG1, triggering and conducting, electrolytic capacitor C1 are charged by bus again at the t3 moment, while LED constant current control
Device 1 processed detects control terminal A point voltages, and when A points voltage is less than C point voltages, LED constant current controller 1 turns off, and works as busbar voltage
Vin>VLED light sourceWhen（I.e. busbar voltage is more than the conduction voltage drop of LED light source）, LED light source is bright, and now LED light source is by power supply
It is powered, subsequent control process repeats above-mentioned control process, repeats no more here.
To sum up, the screen luminance of mobile phone control device of the present embodiment, being provided by LED constant current controller 1 can described in maintaining
Control the anode forward current needed for silicon dimmer conduction；Controllable silicon dimmer can be made quickly to be opened when starting in next cycle
It is dynamic, avoid the mobile phone screen light source in the case where switching switching state（That is LED）The problem of flashing, and due to controllable silicon light modulation
Device fast conducting improves the active power of circuit, i.e., it realizes that circuit has High Power Factor value, it is easy to accomplish regulation, and
Circuit structure is simple, and required cost is relatively low, in addition, eliminating the stroboscopic point by mobile phone screen light source by electrolytic capacitor C1
Amount, can avoid stroboscopic phenomenon, and broaden work input voltage range, make mobile phone screen light source（That is LED light source）After rectification
Busbar voltage be less than mobile phone screen light source（That is LED light source）Conduction voltage drop when continue keep working condition, and when electrolysis electricity
Container C1 gives mobile phone screen light source（That is LED light source）During power supply, electrolytic capacitor can be made to mobile phone by LED constant current controller 3
Screen light source（That is LED light source）The time lengthening of power supply, further increase light efficiency intensity.
Claims (7)
1. a kind of screen luminance of mobile phone control device, includes mobile phone screen display processing unit, it is characterised in that also include with
The connected screen luminance of mobile phone control unit of the mobile phone screen display processing unit, the screen luminance of mobile phone control unit tool
Body includes：
Mobile phone screen light source, rectification processing module, controllable silicon dimmer, the first constant-current controller, the second constant-current controller, the 3rd
Constant-current controller, electrolytic capacitor, commutation diode, the first sampling resistor, the second sampling resistor and the 3rd sampling resistor；
The rectification processing module is connected by the controllable silicon dimmer with external power supply, the positive of the rectification processing module
Output end connects one end of first constant-current controller and the anode of the commutation diode, and the rectification processing module is born
Phase output terminal is grounded after being connected with the other end of first constant-current controller, and the control terminal A of first constant-current controller leads to
The first sampling resistor and the second sampling resistor ground connection are crossed, first sampling resistor and second sampling resistor pass through C point phases
Even, the negative electrode of the commutation diode connects one end of the 3rd constant-current controller and the positive pole of the first electrolytic capacitor,
The other end of 3rd constant-current controller connects the anode of the light source, while the control terminal D of the 3rd constant-current controller
It is connected by 3rd resistor with the anode of the light source, the negative pole of the electrolytic capacitor connects negative electrode and the institute of the light source
State one end of the second constant-current controller, the other end ground connection of second constant-current controller, while second constant-current controller
Control terminal B be grounded by the second sampling resistor；
Wherein when the first constant-current controller control terminal A points voltage is more than C point voltages, the first constant-current controller conducting
To provide the anode forward current for maintaining the controllable silicon dimmer conducting required；Busbar voltage after rectification is less than the light
During the conduction voltage drop in source, the electrolytic capacitor is to the light source power supply.
2. device according to claim 1, it is characterised in that also include the input controlling switch being connected with external power supply.
3. a kind of screen luminance of mobile phone control device, includes mobile phone screen display processing unit, it is characterised in that also include with
The connected screen luminance of mobile phone control unit of the mobile phone screen display processing unit, the screen luminance of mobile phone control unit tool
Body includes：
Mobile phone screen light source；
Controllable silicon dimmer, for controlling the input current size of external power supply to adjust the brightness of LED light source；
Rectification processing module, it is connected by the controllable silicon dimmer with external power supply, it is whole for being carried out to input external power supply
Stream；
First constant-current controller processing module, it is connected with the rectification processing module, the controllable silicon light modulation is maintained for providing
Anode forward current needed for device conducting；
Second constant-current controller processing module, is connected with the light source, for for the light source and electrolytic capacitor processing module
Constant current driving is provided；
The electrolytic capacitor processing module, its electrolytic capacitor is in parallel with the light source, small for the busbar voltage in input
When the conduction voltage drop of light source, to the light source power supply；
3rd constant-current controller processing module, its connected with the light source formed again with electrolytic capacitor it is in parallel, for institute
When stating light source power supply, constant current driving is provided for the light source.
4. device according to claim 3, it is characterised in that the electrolytic capacitor processing module specifically includes electrolysis electricity
Container and commutation diode, the anode of the commutation diode connects the positive output end of the rectification processing module, described whole
The negative electrode for flowing diode connects the positive pole of the electrolytic capacitor, while the negative electrode of the commutation diode is also permanent with the described 3rd
Stream controller processing module is connected.
5. device according to claim 4, it is characterised in that the first constant-current controller processing module specifically includes：
First constant-current controller and the first sampling resistor, the second constant-current controller processing module specifically include：Second current constant control
Device and the second sampling resistor, wherein the positive output end of the first constant-current controller its one end and the rectification processing module with
And the anode of the commutation diode is connected, other end ground connection, while the first constant-current controller control terminal A passes through described the
One sampling resistor and second sampling resistor ground connection, pass through C between first sampling resistor and second sampling resistor
Point is connected, and the second constant-current controller its one end is connected with the negative electrode of the light source and the negative pole of the electrolytic capacitor,
The other end is grounded, while the control terminal B of second constant-current controller is grounded by second resistance.
6. device according to claim 4, it is characterised in that the 3rd constant-current controller processing module specifically includes：
3rd constant-current controller and the 3rd sampling resistor, wherein the 3rd constant-current controller its one end and the moon of the commutation diode
Extremely it is connected, the other end is connected with the anode of the light source, while the control terminal D of the 3rd constant-current controller passes through the described 3rd
Sampling resistor is connected with the anode of the light source.
7. device according to claim 4, it is characterised in that also include the input controlling switch being connected with external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621446479.2U CN206774210U (en) | 2016-12-27 | 2016-12-27 | A kind of screen luminance of mobile phone control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621446479.2U CN206774210U (en) | 2016-12-27 | 2016-12-27 | A kind of screen luminance of mobile phone control device |
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| Publication Number | Publication Date |
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| CN206774210U true CN206774210U (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621446479.2U Expired - Fee Related CN206774210U (en) | 2016-12-27 | 2016-12-27 | A kind of screen luminance of mobile phone control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121628A1 (en) * | 2016-12-30 | 2018-07-05 | 广州兴普电子科技有限公司 | Apparatus for controlling brightness of screen of mobile phone |
| WO2018121707A1 (en) * | 2016-12-30 | 2018-07-05 | 广州兴普电子科技有限公司 | Device for controlling brightness of mobile phone screen |
-
2016
- 2016-12-27 CN CN201621446479.2U patent/CN206774210U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121628A1 (en) * | 2016-12-30 | 2018-07-05 | 广州兴普电子科技有限公司 | Apparatus for controlling brightness of screen of mobile phone |
| WO2018121707A1 (en) * | 2016-12-30 | 2018-07-05 | 广州兴普电子科技有限公司 | Device for controlling brightness of mobile phone screen |
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Granted publication date: 20171219 Termination date: 20181227 |