CN110058481A - A kind of laser drive, projection device and method - Google Patents
A kind of laser drive, projection device and method Download PDFInfo
- Publication number
- CN110058481A CN110058481A CN201910451245.9A CN201910451245A CN110058481A CN 110058481 A CN110058481 A CN 110058481A CN 201910451245 A CN201910451245 A CN 201910451245A CN 110058481 A CN110058481 A CN 110058481A
- Authority
- CN
- China
- Prior art keywords
- laser
- current
- drive
- pretrigger
- electric current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims description 16
- 238000003384 imaging method Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
Abstract
The present invention discloses a kind of laser drive, comprising: current source module and drive module；The drive module sends driving signal to the current source module；Pretrigger electric current is input to the laser when not receiving driving signal by the current source module；When receiving driving signal, starting current is input to the laser, to drive the laser emitting laser；The current value of the pretrigger electric current is less than the threshold current of the laser, and the current value of the starting current is more than or equal to the threshold current of the laser.The present invention enables to laser to save time of pulse daley when carrying out luminous.
Description
Technical field
The present invention relates to Color Laser Projection Technology field, more particularly to a kind of laser drive, projection device and
Method.
Background technique
The monochromaticjty of laser is good, coherence is good, good directionality, brightness height, has color with the micro projector of laser
The advantages that domain range is big, color saturation is high, display brightness is high using laser as projection light source, and projection light source is collimated and is put down
Row, using deflecting mirror as the deflection of projection angle, can be projected out image in different distances.
Existing laser itself can exist Pulse delay (pulse daley), and when projection device receives projection letter
Number when, need to be powered to multiple lasers respectively to drive multiple lasers to shine, due to the Pulse of assorted laser
Time of delay (pulse daley) is different, therefore will lead to multiple lasers and can not carry out simultaneously luminous, leads to the picture of projection
There is color difference in face, and the quality of projected picture can reduce.
Summary of the invention
The purpose of the present invention is to provide a kind of laser drive, projection device and methods, enable to laser
Device saves the time of pulse daley when carrying out luminous.
In order to achieve the above objectives, first aspect present invention proposes a kind of laser drive, comprising: current source module and
Drive module；
The drive module sends driving signal to the current source module；
Pretrigger electric current is input to the laser when not receiving driving signal by the current source module；It is receiving
When driving signal, starting current is input to the laser, to drive the laser emitting laser；The pretrigger electric current
Current value be less than the threshold current of the laser, the current value of the starting current is more than or equal to the threshold value of the laser
Electric current.
Preferably, the current source module includes the battery of output current adjustable value.
Preferably, the drive module includes processor.
Preferably, the current value of the pretrigger electric current is arranged to the 90%-99% of the threshold current of the laser.
Second aspect of the present invention proposes a kind of projection device, comprising:
Multiple lasers；
With the one-to-one multiple laser drives as mentioned of the multiple laser；And
Projecting cell；
Wherein, the laser of laser emitting is carried out projection imaging by the projecting cell.
Preferably, the projecting cell includes scanning galvanometer.
Preferably, the multiple laser includes at least one red laser, at least one blue laser and extremely
A few green (light) laser.
Third aspect present invention proposes a kind of laser-driving method, comprising the following steps:
Pretrigger electric current is input to the laser, the current value of the pretrigger electric current is less than the threshold of the laser
It is worth electric current；
Based on driving signal, starting current is input to the laser, it is described to drive the laser emitting laser
The current value of starting current is more than or equal to the threshold current of the laser.
Fourth aspect present invention proposes a kind of projecting method, comprising the following steps:
Pretrigger electric current is separately input into multiple lasers, the current value of the pretrigger electric current is less than each laser
Threshold current；
Based on driving signal, starting current is input to laser, to drive laser emitting laser；
The laser of laser emitting is subjected to projection imaging.
Preferably, the current value of the pretrigger electric current is arranged to the 90%-99% of the threshold current of the laser.
Beneficial effects of the present invention are as follows:
The present invention pre-enters pre- open to multiple lasers by multiple laser drives before carrying out projection work
Streaming current, and the time of the Pulse delay (pulse daley) of multiple lasers is saved, in projection, again by laser
Driving device inputs starting current to laser to make laser while shine, so that the picture of projection is not in color difference,
The quality for improving projected picture, has the advantages of simple structure and easy realization.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 shows a kind of structural block diagram of laser drive of one embodiment of the present of invention proposition；
Fig. 2 shows a kind of structural block diagrams for projection device that another embodiment of the invention proposes；
Fig. 3 shows a kind of step flow chart for laser-driving method that another embodiment of the invention proposes；
Fig. 4 shows a kind of step flow chart of projecting method of yet another embodiment of the present invention proposition.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
Fig. 1 shows a kind of structural block diagram of laser drive of one embodiment of the present of invention proposition, such as Fig. 1 institute
Show, the laser drive includes current source module and drive module.
Specifically, in the present embodiment, drive module is mainly used for sending driving signal to current source module, exemplary
, drive module concretely processor, those skilled in the art it should be understood that, drive module is not limited only to as processor,
In the protection scope that there is the device or system for sending driving signal to current source module should also belong to the present embodiment for he, electric current
Source module is input to the laser when not receiving driving signal, by pretrigger electric current, and the current value of pretrigger electric current is small
In the threshold current of laser, specific value can voluntarily be set by user, and illustratively, pretrigger electric current can be laser
The 90%-99% of the threshold current of device, since the pretrigger electric current that laser receives is less than the threshold current of laser,
Laser not will do it luminous, and when current source module receives driving signal, current source module can input starting current
Into laser, the current value of starting current is greater than or equal to the threshold current of laser, and specific value can be by user voluntarily
It is set, since the starting current that laser receives is greater than or equal to the threshold current of laser, laser can be sent out
Light, lasers multiple in this way can save multiple laser and pre-entering pretrigger electric current during emission optical projections
The time of the Pulse delay (pulse daley) of device, multiple lasers while emission optical projections, so that the picture of projection will not go out
Existing color difference, improves the quality of projected picture, it is understood that, the storage of current source module concretely adjustable current output valve
Battery.
Fig. 2 shows a kind of structural block diagrams for projection device that another embodiment of the invention proposes, as shown in Fig. 2, institute
Stating projection device includes: multiple lasers；It is one-to-one multiple as above-mentioned laser drives dress with the multiple laser
It sets；And projecting cell；Wherein, the laser of laser emitting is carried out projection imaging by the projecting cell.
Specifically, the present embodiment is preparatory to multiple lasers by multiple laser drives before carrying out projection work
Pretrigger electric current is inputted, and saves the time of the Pulse delay (pulse daley) of multiple lasers, in projection, is led to again
It crosses laser drive and starting current is inputted to laser to make laser while shine, so that the picture of projection will not go out
Existing color difference, improves the quality of projected picture.
In the following, projection device described in the present embodiment is further introduced in conjunction with practical application scene, user is selected
When the projection device is projected, there are multiple lasers due to projection device and swash correspondingly with multiple lasers
Therefore pretrigger electric current is input in corresponding laser by laser drive by light device driving device first, this
When, the electric current in multiple lasers is up to the current value size of pretrigger electric current, when laser drive receives driving
When signal, starting current can be input in laser by laser, be filled so that driving with the laser for receiving driving signal
It sets corresponding laser to shine and carry out projection imaging by projecting cell, so as to guarantee that multiple Laser synchronisations carry out
It shines, saves the time of the Pulse delay (pulse daley) of multiple lasers, so that the picture of projection is not in color
Difference improves the quality of projected picture.
In a specific implementation of the present embodiment, the projecting cell includes scanning galvanometer.
Specifically, the laser of multiple laser emittings can carry out projection imaging by scanning galvanometer.
In one of the present embodiment specific implementation, the multiple laser includes at least one red laser, at least
One blue laser and at least one green (light) laser.
Fig. 3 shows a kind of step flow chart for laser-driving method that another embodiment of the invention proposes, such as Fig. 3
It is shown, it the described method comprises the following steps:
Pretrigger electric current is input to the laser, the current value of the pretrigger electric current is less than the threshold of the laser
It is worth electric current；
Based on driving signal, starting current is input to the laser, it is described to drive the laser emitting laser
The current value of starting current is more than or equal to the threshold current of the laser.
Specifically, pretrigger electric current is input to the laser, the current value of pretrigger electric current is less than the threshold of laser
It is worth electric current, since the pretrigger electric current that laser receives is less than the threshold current of laser, laser not will do it hair
Light, and when receiving driving signal, starting current is input in laser, the current value of starting current, which is greater than or equal to, to swash
The threshold current of light device, since the starting current that laser receives is greater than or equal to the threshold current of laser, laser
Device can shine, and lasers multiple in this way can be saved more during emission optical projections and pre-entering pretrigger electric current
The time of the Pulse delay (pulse daley) of a laser, multiple lasers while emission optical projections, so that the picture of projection
Be not in color difference, improve the quality of projected picture.
Fig. 4 shows a kind of step flow chart of projecting method of yet another embodiment of the present invention proposition, as shown in figure 4,
It the described method comprises the following steps:
Pretrigger electric current is separately input into multiple lasers, the current value of the pretrigger electric current is less than each laser
Threshold current；
Based on driving signal, starting current is input to laser, to drive laser emitting laser；
The laser of laser emitting is subjected to projection imaging.
Specifically, the present embodiment before carrying out projection work by pre-entering pretrigger electric current to multiple lasers, and
The time for saving the Pulse delay (pulse daley) of multiple lasers is based on driving signal, again by right in projection
Laser inputs starting current to make laser while shine, so that the picture of projection is not in color difference, improves shadowgraph
The quality in face, specifically, the specific value of pretrigger electric current can voluntarily be set by user, illustratively, pretrigger electric current
It can be the 90%-99% of the threshold current of laser.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (10)
1. a kind of laser drive characterized by comprising current source module and drive module；
The drive module sends driving signal to the current source module；
Pretrigger electric current is input to the laser when not receiving driving signal by the current source module；Receiving driving
When signal, starting current is input to the laser, to drive the laser emitting laser；The electricity of the pretrigger electric current
Flow valuve is less than the threshold current of the laser, and the current value of the starting current is more than or equal to the threshold value electricity of the laser
Stream.
2. laser drive according to claim 1, which is characterized in that the current source module includes adjustable output
The battery of current value.
3. laser drive according to claim 1, which is characterized in that the drive module includes processor.
4. laser drive according to claim 1, which is characterized in that the current value of the pretrigger electric current is set
It is set to the 90%-99% of the threshold current of the laser.
5. a kind of projection device characterized by comprising
Multiple lasers；
It is one-to-one multiple such as laser drive of any of claims 1-4 with the multiple laser；
And
Projecting cell；
Wherein, the laser of laser emitting is carried out projection imaging by the projecting cell.
6. projection device according to claim 5, which is characterized in that the projecting cell includes scanning galvanometer.
7. projection device according to claim 5, which is characterized in that the multiple laser includes that at least one feux rouges swashs
Light device, at least one blue laser and at least one green (light) laser.
8. a kind of laser-driving method, which comprises the following steps:
Pretrigger electric current is input to the laser, the current value of the pretrigger electric current is less than the threshold value electricity of the laser
Stream；
Based on driving signal, starting current is input to the laser, to drive the laser emitting laser, the starting
The current value of electric current is more than or equal to the threshold current of the laser.
9. a kind of projecting method, which comprises the following steps:
Pretrigger electric current is separately input into multiple lasers, the current value of the pretrigger electric current is less than the threshold value of each laser
Electric current；
Based on driving signal, starting current is input to laser, to drive laser emitting laser；
The laser of laser emitting is subjected to projection imaging.
10. projecting method according to claim 9, which is characterized in that the current value of the pretrigger electric current is arranged to
The 90%-99% of the threshold current of the laser.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811417840.2A CN109283782A (en) | 2018-11-26 | 2018-11-26 | A kind of laser drive, projection device and method |
| CN2018114178402 | 2018-11-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110058481A true CN110058481A (en) | 2019-07-26 |
Family
ID=65172758
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811417840.2A Pending CN109283782A (en) | 2018-11-26 | 2018-11-26 | A kind of laser drive, projection device and method |
| CN201910451245.9A Pending CN110058481A (en) | 2018-11-26 | 2019-05-28 | A kind of laser drive, projection device and method |
| CN201920781297.8U Active CN209765254U (en) | 2018-11-26 | 2019-05-28 | Laser driving device and projection equipment |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811417840.2A Pending CN109283782A (en) | 2018-11-26 | 2018-11-26 | A kind of laser drive, projection device and method |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920781297.8U Active CN209765254U (en) | 2018-11-26 | 2019-05-28 | Laser driving device and projection equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456602A (en) * | 2019-08-22 | 2019-11-15 | 歌尔股份有限公司 | A kind of projection pattern means for correcting of optical projection system, method and system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283782A (en) * | 2018-11-26 | 2019-01-29 | 歌尔股份有限公司 | A kind of laser drive, projection device and method |
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| CN110456602B (en) * | 2019-08-22 | 2021-06-18 | 歌尔股份有限公司 | Projection pattern correction device, method and system of projection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN209765254U (en) | 2019-12-10 |
| CN109283782A (en) | 2019-01-29 |
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