CN106773486A - Laser projection power circuit - Google Patents
Laser projection power circuit Download PDFInfo
- Publication number
- CN106773486A CN106773486A CN201611253240.8A CN201611253240A CN106773486A CN 106773486 A CN106773486 A CN 106773486A CN 201611253240 A CN201611253240 A CN 201611253240A CN 106773486 A CN106773486 A CN 106773486A
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- laser
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- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 230000005611 electricity Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims 1
- 230000003287 optical effect Effects 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention 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 present invention 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 to 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 present invention relates to project 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 turn into the product of people's favor without the advantage of focusing.
Laser-projector can include lasing light emitter, optical modulator, optical system, optical scanner and image controller and
Power circuit.Traditional power circuit when for voltage needed 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 can cause one to the eyes of user
, easily there is the situation of device failure during long-term work in fixed injury.
The content of the invention
Based on this, it is necessary to for the problem that above-mentioned background technology is present, there is provided a kind of reliability laser projection electricity high
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 invention discloses a kind of laser projection power circuit, it includes EMC filter circuit list
Unit, rectification filtering unit, PFC boost circuit unit, some constant-current circuit units, AD conversion unit, DA converting units and MCU control
Unit processed, the EMC filter circuit unit, rectification filtering unit and PFC boost circuit unit are electrically connected with successively, the EMC
The external civil power in 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 are electrical with laser constant current output unit
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
Unit 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.
Wherein in one embodiment, the PFC boost circuit unit other end is electrically connected with supply voltage unit, described
Supply voltage unit is electrically connected with the second transformer unit and the 3rd transformer unit, described 3rd transformer unit one end
It is electrically connected with MCU control unit and PWM constant-current control units.
In sum, laser projection power circuit of the present invention controls laser constant current output list by PWM constant-current control units
The output current of unit, cooperation is detected using current detecting unit to the output current of laser constant current output unit, by MCU
Control unit and brightness adjustment control list PWM constant-current control units, further the output current value to laser constant current output unit carry out
Adjust, and then control to adjust the brightness per road laser, the current ripples per road laser are controlled well, solve laser and flash now
As.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of laser projection power circuit of the present invention；
Fig. 2 is the circuit theory diagrams after laser projection power circuit combination external power source circuit of the present invention.
Specific embodiment
As depicted in figs. 1 and 2, laser projection power circuit of the present invention includes EMC filter circuit unit 10, rectifying and wave-filtering list
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 are electrically connected with successively, institute
The external civil power in the one end of EMC filter circuit unit 10 is stated, the EMC filter circuit unit 10 is once filtered to mains circuit,
Secondary filtering is carried out by rectification filtering unit 20 through the filtered electric current of EMC filter circuit unit 10, to reduce the line of civil power
Ripple electric current is impacted to the component in loop, influences 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, and are used for constant-current circuit unit 40 with the 380V~400V high voltage direct currents for providing stabilization, institute
The fan-out capability for stating PFC boost circuit unit 30 reaches more than 2500W, and voltage ripple is multiple constant-current circuit lists within 10V
Unit 40 provides the output of stabilization；The PFC boost circuit unit 30 is electrically connected with the one end of constant-current circuit unit 40.
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, be used 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 are defeated with laser constant current
Go out unit 43 to be electrically connected with, be used to be supplied to the stabling current of laser constant current output unit 43, the current detecting unit 44 with swash
Light constant current output unit 43 is electrically connected with, and is used to detect the current value for flowing through laser constant current output unit 43.
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 the analog switch unit 80 unit 40 and AD conversion unit 50
Connection break-make, 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 for sending.
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 for sending 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；Meanwhile, the laser sent by multiple laser constant current output units 43 can cause that projection screen brightness increases
Plus, larger improve energy utilization rate compared to single laser projection pattern；In addition, multiple laser constant current output units 43 are simultaneously
Connection connection, is still ensuring that projection work just on the premise of one or several failures of laser constant current output units 43 wherein
Often operation, greatly improves product Practical Performance.
Wherein in one embodiment, the other end of PFC boost circuit unit 30 is electrically connected with supply voltage unit
110, the supply voltage unit 110 is electrically connected with the second transformer unit 120 and the 3rd transformer unit 130, 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 sum, laser projection power circuit of the present invention controls laser constant current output by PWM constant-current control units 41
The output current of unit 43, cooperation is examined using current detecting unit 44 to the output current of laser constant current output unit 43
Survey, PWM constant-current control units 41 are fed back signal to by MCU control unit 70 and dimming control unit 90, further to laser
The output current value of constant current output unit 43 is adjusted, and then controls to adjust the brightness per road laser, controls well per road
The current ripples of laser, solve laser Flickering Phenomenon.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention 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
Unit, 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 supply voltage unit is electrically connected with the second transformer unit and the 3rd transformer
Unit, described 3rd transformer unit one end is electrically connected with MCU control unit and PWM constant-current control units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611253240.8A CN106773486A (en) | 2016-12-30 | 2016-12-30 | Laser projection power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611253240.8A CN106773486A (en) | 2016-12-30 | 2016-12-30 | Laser projection power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106773486A true CN106773486A (en) | 2017-05-31 |
Family
ID=58953053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611253240.8A Pending CN106773486A (en) | 2016-12-30 | 2016-12-30 | Laser projection power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106773486A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567132A (en) * | 2017-08-30 | 2018-01-09 | 苏州佳世达光电有限公司 | Drive circuit, control method and projector |
| CN110727304A (en) * | 2018-07-17 | 2020-01-24 | 深圳凯世光研股份有限公司 | Current output correction method for laser driving circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242550A (en) * | 1997-02-24 | 1998-09-11 | Mitsubishi Electric Corp | Constant current power source for laser and laser machining equipment |
| CN201967194U (en) * | 2010-12-14 | 2011-09-07 | 惠州大景照明控制有限公司 | Intelligent constant current LED light adjusting controller |
| CN203120225U (en) * | 2012-12-28 | 2013-08-07 | 广州市雷格斯光电科技有限公司 | Multi-mode light control and constant current drive circuit for LED illumination |
| CN104202880A (en) * | 2014-09-09 | 2014-12-10 | 四川长虹照明技术有限公司 | LED (Light Emitting Diode) intelligent lamp |
| CN104883781A (en) * | 2015-05-21 | 2015-09-02 | 华南理工大学 | Centralized power supply type LED intelligent illumination system and control method thereof |
-
2016
- 2016-12-30 CN CN201611253240.8A patent/CN106773486A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10242550A (en) * | 1997-02-24 | 1998-09-11 | Mitsubishi Electric Corp | Constant current power source for laser and laser machining equipment |
| CN201967194U (en) * | 2010-12-14 | 2011-09-07 | 惠州大景照明控制有限公司 | Intelligent constant current LED light adjusting controller |
| CN203120225U (en) * | 2012-12-28 | 2013-08-07 | 广州市雷格斯光电科技有限公司 | Multi-mode light control and constant current drive circuit for LED illumination |
| CN104202880A (en) * | 2014-09-09 | 2014-12-10 | 四川长虹照明技术有限公司 | LED (Light Emitting Diode) intelligent lamp |
| CN104883781A (en) * | 2015-05-21 | 2015-09-02 | 华南理工大学 | Centralized power supply type LED intelligent illumination system and control method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107567132A (en) * | 2017-08-30 | 2018-01-09 | 苏州佳世达光电有限公司 | Drive circuit, control method and projector |
| CN110727304A (en) * | 2018-07-17 | 2020-01-24 | 深圳凯世光研股份有限公司 | Current output correction method for laser driving circuit |
| CN110727304B (en) * | 2018-07-17 | 2021-04-23 | 深圳凯世光研股份有限公司 | Current output correction method for laser driving circuit |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |