CN101976014A - Laser projector capable of eliminating speckles - Google Patents
Laser projector capable of eliminating speckles Download PDFInfo
- Publication number
- CN101976014A CN101976014A CN2010105202603A CN201010520260A CN101976014A CN 101976014 A CN101976014 A CN 101976014A CN 2010105202603 A CN2010105202603 A CN 2010105202603A CN 201010520260 A CN201010520260 A CN 201010520260A CN 101976014 A CN101976014 A CN 101976014A
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- Prior art keywords
- module
- vibration
- laser
- housing
- speckle
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Abstract
The invention provides a laser projector which comprises a shell, a laser source arranged in the shell and a vibration module for driving the laser source to vibrate with specific amplitude. In the invention, speckles can be eliminated by means of vibration of the laser source in the projector, and the projected image quality of the projector is ensured.
Description
Technical field
The present invention relates to a kind of laser projection, relate in particular to a kind of laser projection that can eliminate speckle.
Background technology
Therefore laser projection has advantages such as long-life, low energy consumption owing to adopt laser as light source.Because laser is a kind of coherent light (coherent light),, then understand the speckle pattern because of the laser interference generation of display brightness skewness on the screen, promptly so-called speckle (speckle) if laser is not done any processing and is directly used in Projection Display.
Publication number be CN1665285 patent disclosure adopt the method for oscillating mirror to eliminate speckle, the shortcoming of this patent is to cause complex structure, reliability reduces.
Summary of the invention
In view of this, be necessary to provide a kind of laser projection that can eliminate speckle.
The invention provides a kind of laser projection, comprise housing and the LASER Light Source LASER Light Source that is positioned at housing, this projector is the involving vibrations module also, and this vibration module is used to drive the vibration that this LASER Light Source is made specific amplitude.
By utilizing vibration that the LASER Light Source in the projector is vibrated, can eliminate speckle, guarantee the quality of image that projector's projection goes out.
Description of drawings
Fig. 1 forms the principle schematic of hot spot for showing laser.
Fig. 2 is the frame diagram of laser projection of the present invention.
The main element symbol description
| |
102、103 |
| The surface of |
104 |
| Laser projection | 10 |
| LASER Light Source | 20 |
| Projecting lens | 30 |
| The vibration module | 40 |
| The vibration damping module | 50 |
| Regulate module | 60 |
Embodiment
Fig. 1 has illustrated the synoptic diagram that laser speckle forms.When the surface 104 of coarse screen is arrived in laser radiation, be example with close light beam 102 and 103, after the process diffuse reflection of screen, the A point of light beam 102 and 103 before screen interferes.If the generation constructive interference, then the A point is shown as bright spot, if destructive interference takes place, then the A point is shown as dim spot.Therefore, if the lasing light emitter of projector is not directly used in Projection Display through handling, can show the speckle of irregular distribution on the screen.
With reference to figure 2, laser projection 10 of the present invention comprises LASER Light Source 20, projecting lens 30 and vibration module 40.Be appreciated that ground, for more succinct description the present invention, the present invention only illustrates element related to the present invention.This vibration module 40 is used to drive LASER Light Source 20 and does slightly motion.In the present embodiment, this vibration module 40 can clocklike vibrate on two orthogonal directions.Because LASER Light Source 20 along with vibration module 40 slightly moves, makes that the speckle on the screen also moves accordingly.So, though speckle can not disappear, because the visual persistence effect of human eye, as if observing what aware is the stack pattern of the speckle in a period of time, if the vibration frequency of vibration module 40 is selected suitably then observing and thinking that speckle disappears.
In the present embodiment, in order to reduce the influence that 40 pairs of projector's 10 integral body of vibration module cause, this vibration module 40 also is connected with a vibration damping module 50, this vibration damping module 50 is used to partially absorb the vibration that vibration module 40 produces, and this vibration damping module 50 can be the elastomeric pad on the housing that is arranged on projector 10.
In the present embodiment, this projector 10 also comprises adjusting module module 60, this adjusting module 60 is used to adjust the power input of vibration module 40, adjust the amplitude that vibration module 40 drives LASER Light Source 20 motions with this, thereby can obtain the effect of best elimination speckle when needed by adjusting module 60.
Claims (5)
1. a laser projection comprises housing and the LASER Light Source that is positioned at housing, and it is characterized in that: go back the involving vibrations module, this vibration module is used to drive the vibration that this LASER Light Source is made specific amplitude.
2. laser projection as claimed in claim 1 is characterized in that, also comprises the vibration damping module, and this vibration damping module is used to absorb the vibration of this vibration module to housing.
3. laser projection as claimed in claim 2 is characterized in that, this vibration damping module is the elastomeric pad that is arranged in the housing.
4. laser projection as claimed in claim 2 is characterized in that, this vibration damping module is the spring that is arranged in the housing.
5. laser projection as claimed in claim 1 is characterized in that, also comprises the adjusting module, and this adjusting module is used to regulate the output power of this vibration module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105202603A CN101976014A (en) | 2010-10-26 | 2010-10-26 | Laser projector capable of eliminating speckles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105202603A CN101976014A (en) | 2010-10-26 | 2010-10-26 | Laser projector capable of eliminating speckles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101976014A true CN101976014A (en) | 2011-02-16 |
Family
ID=43575908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105202603A Pending CN101976014A (en) | 2010-10-26 | 2010-10-26 | Laser projector capable of eliminating speckles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101976014A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213839A (en) * | 2011-06-21 | 2011-10-12 | 西安邮电学院 | Laser speckle eliminating device with dodging function |
| CN104155832A (en) * | 2013-05-14 | 2014-11-19 | 罗伯特·博世有限公司 | Laser projection device and laser projection method for projecting laser beams onto a projection plane |
| CN104375280A (en) * | 2014-11-20 | 2015-02-25 | 西安炬光科技有限公司 | Semiconductor laser unit system eliminating laser speckles |
| CN106094242A (en) * | 2016-05-10 | 2016-11-09 | 许江珂 | A kind of light field scanner for eliminating picture laser speckle |
-
2010
- 2010-10-26 CN CN2010105202603A patent/CN101976014A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213839A (en) * | 2011-06-21 | 2011-10-12 | 西安邮电学院 | Laser speckle eliminating device with dodging function |
| CN104155832A (en) * | 2013-05-14 | 2014-11-19 | 罗伯特·博世有限公司 | Laser projection device and laser projection method for projecting laser beams onto a projection plane |
| CN104155832B (en) * | 2013-05-14 | 2018-04-06 | 罗伯特·博世有限公司 | For the laser projection device and method for projecting to laser beam on projection plane |
| CN104375280A (en) * | 2014-11-20 | 2015-02-25 | 西安炬光科技有限公司 | Semiconductor laser unit system eliminating laser speckles |
| CN106094242A (en) * | 2016-05-10 | 2016-11-09 | 许江珂 | A kind of light field scanner for eliminating picture laser speckle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110216 |