CN206331221U - Laser projection power circuit - Google Patents
Laser projection power circuit Download PDFInfo
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- CN206331221U CN206331221U CN201621473400.5U CN201621473400U CN206331221U CN 206331221 U CN206331221 U CN 206331221U CN 201621473400 U CN201621473400 U CN 201621473400U CN 206331221 U CN206331221 U CN 206331221U
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- 230000003287 optical effect Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model discloses a kind of laser projection power circuit, it includes EMC filter circuit unit, rectification filtering unit, PFC boost circuit unit, some constant-current circuit units, AD conversion unit, DA converting units and MCU control unit, and the constant-current circuit unit includes PWM constant-current control units, the first transformer unit, laser constant current output unit and current detecting unit.The utility model controls the output current of laser constant current output unit by PWM constant-current control units, cooperation is detected using current detecting unit to the output current of laser constant current output unit, PWM constant-current control units are fed back signal to by MCU control unit and dimming control unit, further the output current value of laser constant current output unit is adjusted, and then control to adjust the brightness of every road laser, the current ripples per road laser are controlled well, solve laser Flickering Phenomenon.
Description
Technical field
The utility model is related to projection power technique fields, more particularly, to a kind of laser projection power circuit.
Background technology
Projecting apparatus has turned into the product that modern business personage commonly uses.With existing numerical digit optical processor (Digital Light
Procession, DLP) or silicon wafer light technology (Liquid Crystalon Silicon, LCoS) compare, laser-projector because
Its power consumption is less, projection image bigger (can be more than 100 cun) and the product favored without the advantage of focusing as people.
Laser-projector can include lasing light emitter, optical modulator, optical system, optical scanner and image controller and
Power circuit.Traditional power circuit is in voltage needed for for lasing light emitter, because the current fluctuation of power circuit can produce ripple
Electric current, causes lasing light emitter Flickering Phenomenon occur, and certain influence is produced to drop shadow effect, also one can be caused to the eyes of user
, easily there is the situation of device failure during long-term work in fixed injury.
Utility model content
Based on this, it is necessary to which there is provided a kind of high laser projection electricity of reliability for the problem of existing for above-mentioned background technology
Source circuit, the ripple current of circuit where control lasing light emitter, it is to avoid the phenomenon that laser flashes occur.
To achieve the above object, the utility model discloses a kind of laser projection power circuit, it includes EMC filter circuit
Unit, rectification filtering unit, PFC boost circuit unit, some constant-current circuit units, AD conversion unit, DA converting units and MCU
Control unit, the EMC filter circuit unit, rectification filtering unit and PFC boost circuit unit are electrically connected with successively, described
The external civil power in EMC filter circuit unit one end, the PFC boost circuit unit is electrically connected with constant-current circuit unit one end；
The constant-current circuit unit include PWM constant-current control units, the first transformer unit, laser constant current output unit and
Current detecting unit, described first transformer unit one end is electrically connected with PFC boost circuit unit, the first transformer list
First other end is electrically connected with laser constant current output unit, and the PWM constant-current control units and laser constant current output unit are electrical
Connection, the current detecting unit is electrically connected with laser constant current output unit；
The constant-current circuit unit other end is electrically connected with analog switch unit, the analog switch unit and AD conversion list
Member is electrically connected with, and the MCU control unit output end connects DA converting units, and the DA converting units are electrically connected with light modulation control
Unit processed, the dimming control unit is electrically connected with PWM constant-current control units.
In wherein one embodiment, the PFC boost circuit unit other end is electrically connected with supply voltage unit, described
The second transformer unit and the 3rd transformer unit, described 3rd transformer unit one end is electrically connected in supply voltage unit
MCU control unit and PWM constant-current control units is electrically connected.
In summary, the utility model laser projection power circuit controls laser constant current defeated by PWM constant-current control units
Go out the output current of unit, cooperation is detected using current detecting unit to the output current of laser constant current output unit, is led to
MCU control unit and brightness adjustment control list PWM constant-current control units are crossed, further to the output current value of laser constant current output unit
It is adjusted, and then controls to adjust the brightness per road laser, the current ripples per road laser are controlled well, solves laser sudden strain of a muscle
Dynamic phenomenon.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the utility model laser projection power circuit；
Fig. 2 is the circuit theory diagrams after the utility model laser projection power circuit combination external power source circuit.
Embodiment
As depicted in figs. 1 and 2, the utility model laser projection power circuit includes EMC filter circuit unit 10, rectification filter
Ripple unit 20, PFC boost circuit unit 30, some constant-current circuit units 40, AD conversion unit 50, DA converting units 60 and MCU
Control unit 70, the EMC filter circuit unit 10, rectification filtering unit 20 and PFC boost circuit unit 30 electrically connect successively
Connect, the external civil power in described one end of EMC filter circuit unit 10, the EMC filter circuit unit 10 is carried out once to mains circuit
Filtering, carries out secondary filtering, to reduce civil power through the filtered electric current of EMC filter circuit unit 10 by rectification filtering unit 20
Ripple current the component in loop is impacted, influence using effect.
Described one end of PFC boost circuit unit 30 is electrically connected with rectification filtering unit 20, the PFC boost circuit unit
30 pairs of line voltages boost, so that constant-current circuit unit 40 is used；The PFC boost circuit unit 30 and constant-current circuit list
First 40 one end are electrically connected with.
The constant-current circuit unit 40 includes PWM constant-current control units 41, the first transformer unit 42, laser constant current output
Unit 43 and current detecting unit 44, described one end of first transformer unit 42 are electrically connected with PFC boost circuit unit 30, institute
State the other end of the first transformer unit 42 to be electrically connected with laser constant current output unit 43, to PFC boost circuit unit 30
The burning voltage of laser constant current output unit 43 is supplied to after carrying out transformation；The PWM constant-current control units 41 and laser constant current are defeated
Go out unit 43 to be electrically connected with, to be supplied to the stabling current of laser constant current output unit 43, the current detecting unit 44 is with swashing
Light constant current output unit 43 is electrically connected with, and the current value of laser constant current output unit 43 is flowed through to detect.
The other end of constant-current circuit unit 40 is electrically connected with analog switch unit 80, the analog switch unit 80 and AD
Converting unit 50 is electrically connected with, the electricity between the control constant-current circuit of analog switch unit 80 unit 40 and AD conversion unit 50
Break-make is connected, the AD conversion unit 50 is electrically connected with MCU control unit 70, and MCU control unit 70 receives AD conversion unit 50
Judgement flows through the size of current of laser constant current output unit 43 after the electric signal sent.
The output end of the MCU control unit 70 connection DA converting units 60, the DA converting units 60 are electrically connected with tune
Light control unit 90, the dimming control unit 90 is electrically connected with PWM constant-current control units 41, and the MCU control unit 70 is sent out
Go out control signal and be converted into corresponding voltage signal to DA converting units 60, the dimming control unit 90 is to MCU control unit 70
The control signal sent is fed back, and to reduce or increase the output current value of laser constant current output unit 43, controls PWM constant currents
The output current value size of control unit 41, and then the brightness per road laser is controlled to adjust, laser constant current output is controlled well
The current precision of unit 43 controls the current ripples per road laser within 150mA in the range of ± 0.1A, well, solves
Laser Flickering Phenomenon.
In wherein one embodiment, the other end of PFC boost circuit unit 30 is electrically connected with supply voltage unit
110, the second transformer unit 120 and the 3rd transformer unit 130 is electrically connected in the supply voltage unit 110, described
Supply voltage unit 110 provides 15V voltage outputs, for PFC boost circuit unit 30, the second transformer unit 120 and the 3rd
The inside IC chip voltage of transformer unit 130 is used, and second transformer unit 120 is used to provide 24V voltages, for outside
Voltage needed for motor；3rd transformer unit 130 is used to provide 5V voltages, described one end of 3rd transformer unit 130 point
Not electricity Xing Lianjie MCU control unit 70 and PWM constant-current control units 41, for MCU control unit 70 and PWM constant-current control units
Voltage needed for 41 inside IC chip work.
In summary, the utility model laser projection power circuit controls laser constant current by PWM constant-current control units 41
The output current of output unit 43, is coordinated and the output current of laser constant current output unit 43 is carried out using current detecting unit 44
Detection, PWM constant-current control units 41 are fed back signal to by MCU control unit 70 and dimming control unit 90, further to swashing
The output current value of light constant current output unit 43 is adjusted, and then controls to adjust the brightness per road laser, controls well every
The current ripples of road laser, solve laser Flickering Phenomenon.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to the utility model the scope of the claims.It should be pointed out that for the common of this area
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (2)
1. a kind of laser projection power circuit, it is characterised in that：Including EMC filter circuit unit, rectification filtering unit, PFC liters
Volt circuit unit, some constant-current circuit units, AD conversion unit, DA converting units and MCU control unit, the EMC filtered electricals
Road unit, rectification filtering unit and PFC boost circuit unit are electrically connected with successively, and described EMC filter circuit unit one end is external
Civil power, the PFC boost circuit unit is electrically connected with constant-current circuit unit one end；
The constant-current circuit unit includes PWM constant-current control units, the first transformer unit, laser constant current output unit and electric current
Detection unit, described first transformer unit one end is electrically connected with PFC boost circuit unit, and first transformer unit is another
One end is electrically connected with laser constant current output unit, and the PWM constant-current control units are electrically connected with laser constant current output unit,
The current detecting unit is electrically connected with laser constant current output unit；
The constant-current circuit unit other end is electrically connected with analog switch unit, the analog switch unit and AD conversion unit electricity
Property connection, the MCU control unit output end connects DA converting units, and the DA converting units are electrically connected with brightness adjustment control list
Member, the dimming control unit is electrically connected with PWM constant-current control units.
2. laser projection power circuit according to claim 1, it is characterised in that：The PFC boost circuit unit is another
End is electrically connected with supply voltage unit, and the second transformer unit and the 3rd transformer is electrically connected in the supply voltage unit
MCU control unit and PWM constant-current control units is electrically connected in unit, described 3rd transformer unit one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621473400.5U CN206331221U (en) | 2016-12-30 | 2016-12-30 | Laser projection power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621473400.5U CN206331221U (en) | 2016-12-30 | 2016-12-30 | Laser projection power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206331221U true CN206331221U (en) | 2017-07-14 |
Family
ID=59293763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621473400.5U Expired - Fee Related CN206331221U (en) | 2016-12-30 | 2016-12-30 | Laser projection power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206331221U (en) |
-
2016
- 2016-12-30 CN CN201621473400.5U patent/CN206331221U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170714 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |