CN108845477A - It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle applied to laser light source - Google Patents
It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle applied to laser light source Download PDFInfo
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- CN108845477A CN108845477A CN201811023948.3A CN201811023948A CN108845477A CN 108845477 A CN108845477 A CN 108845477A CN 201811023948 A CN201811023948 A CN 201811023948A CN 108845477 A CN108845477 A CN 108845477A
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- screen
- vibration
- light source
- speckle
- laser light
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- 230000010355 oscillation Effects 0.000 title claims abstract description 16
- 230000008030 elimination Effects 0.000 claims abstract description 15
- 238000003379 elimination reaction Methods 0.000 claims abstract description 15
- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 229910000640 Fe alloy Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000013013 elastic material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 229910001339 C alloy Inorganic materials 0.000 description 2
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- RIVZIMVWRDTIOQ-UHFFFAOYSA-N cobalt iron Chemical compound [Fe].[Co].[Co].[Co] RIVZIMVWRDTIOQ-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 208000003464 asthenopia Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 230000000007 visual effect 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
- G03B21/54—Accessories
- G03B21/56—Projection screens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The present invention relates to a kind of screen electromagnetic oscillation devices that elimination speckle is shown applied to laser light source, including screen, the screen back side, which is equipped with, to be vibrated by the screen of electromagnetism power drive to eliminate the vibration unit of speckle, and the vibration unit is uniformly placed with several in screen；Vibration unit is the contact type structure for pushing directly on screen vibration, and contact type structure includes electromagnetic coil, vibration transfer layer, vibration transmitting block, vibrating reed；Vibration unit is the contactless structure for driving screen vibration indirectly, and contactless structure includes electromagnetic coil, permanent magnets.The present invention is pushed directly on or screen is driven to vibrate using electromagnetic force, laser speckle eradicating efficacy more preferably, have the advantages that structure it is simple, it is easy for installation, be hardly damaged, long service life.
Description
Technical field
The present invention relates to laser light source projection screen technical fields, specifically a kind of to disappear applied to laser light source projection
Except the screen electromagnetic oscillation device of speckle.
Background technique
With the development of motion picture technique, cinematographic projector develops to digital projection by past film projection, then by now
Extensive use of the laser light source projection technologies in movie theatre, laser light source projection technologies are with its brilliant color rendition degree, bright-coloured
The industrial advantages such as degree, high life and hi-vision resolution just gradually capture motion picture projection market, and completely new viewing is brought to spectators
Impression.
But due to limitation of the laser projector in technical conditions at this stage, so that laser is after screen surface projection reflects
The interference of light is caused, thus the dazzling snow of the graininess for forming random distribution, i.e. laser speckle.Laser speckle can greatly shadow
Image sharpness and image quality effect are rung, and spectators is made to be easy to produce visual fatigue, to significantly reduce film viewing experience.
Mainly there are several types of technical methods for the method for elimination laser speckle at present：
1, upgrade laser projector technology, such as 3P, 6P laser projector and fluorescent powder laser projector application.
2, the vision for making screen generate vibration interference laser speckle is formed, and e.g., is had using taut curtain tube vibration and is driven screen
The form of vibration, or have and drive screen using air agitation, it is allowed to certain frequency amplitude vibrations.
The equipment cost of above method is excessively high, is generally only applicable to the large-scale screen of cinemas movie theater, and screen vibration transmitting
Excessively soft apart from too long or vibration transfer medium, meeting vibrational energy generates loss, to influence the whole eradicating efficacy of laser speckle；
Secondly the above method for eliminating laser speckle, can inevitably generate equipment noise, to influence the sound effect of movie theater projection
Fruit, therefore there is deficiencies for above scheme, are not able to satisfy the demand of social development.
In conclusion in view of the drawbacks of the prior art, there is an urgent need to a kind of vibration transmitting apart from short, vibrational energy loss
It is low, mechanical or noise of air screen vibration device is not generated, so as to solve the deficiencies in the prior art.
Summary of the invention
In order to avoid with solve above-mentioned technical problem, the invention proposes one kind be applied to laser light source projection eliminate speckle
Screen electromagnetic oscillation device.
The technical problems to be solved by the invention are realized using following technical scheme：
It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle, including screen, the screen back applied to laser light source
Face, which is equipped with, to be vibrated by the screen of electromagnetism power drive to eliminate the vibration unit of speckle, and the vibration unit is uniformly arranged in screen
There are several.
As a further improvement of the present invention, the vibration unit is the contact type structure for pushing directly on screen vibration.
As a further improvement of the present invention, the contact type structure include electromagnetic coil, the vibration that is connected in screen
Transfer layer, the vibration transmitting block being connected with vibration transfer layer, one end is connected on vibration transmitting block and the other end is connected to electromagnetism
Vibrating reed on coil.
As a further improvement of the present invention, 1cm before end occurs for the magnetic that the vibrating reed is arranged in parallel in electromagnetic coil
Place.
As a further improvement of the present invention, the soft elastic material system that the vibration transfer layer is thickness 0.5cm~5cm
At the soft elastic material is sponge or silica gel.
As a further improvement of the present invention, the disc-shaped hard material that the vibration transmitting block is diameter 2cm~30cm
It is made, the hard material is any one of iron, aluminium, steel, plastics, plank.
As a further improvement of the present invention, the vibrating reed is made of magnetic conductive metal material, the magnetic conductive metal material
Material is pure iron or ferrous alloys, and the ferrous alloys can be in ferro-silicium, iron-nickel alloy, ferrocobalt, iron-carbon alloy
It is any.
As a further improvement of the present invention, the vibration unit is in lattice arrangement on the screen back side, including transversely
Conllinear distribution, along longitudinal direction conllinear distribution.
As a further improvement of the present invention, the vibration unit is in lattice arrangement on the screen back side, including transversely
Conllinear distribution is interspersed along longitudinal direction.
As a further improvement of the present invention, the vibration unit is the contactless structure for driving screen vibration indirectly.
As a further improvement of the present invention, the vibration unit is arranged in two sides up and down or the surrounding of screen at equal intervals.
As a further improvement of the present invention, the contactless structure include electromagnetic coil, be connected to the screen back side and
The permanent magnets being placed in above the magnetic generation end of electromagnetic coil；The magnetic that the permanent magnets are located at electromagnetic coil occurs above end at 1cm.
As a further improvement of the present invention, it is logical by conducting wire to be connected with power supply, the other end for one end of the electromagnetic coil
It crosses conducting wire and is connected with electric current voltage regulation and frequency modulation device.
The beneficial effects of the invention are as follows：
1, the present invention is pushed directly on using electromagnetic force or screen is driven to vibrate, and screen is made to generate one under controllable state
The vibration of Frequency and Amplitude is determined, so that the speckle effect for interfering laser to be formed in screen curtain face reflection interference, has in visual effect
Effect eliminates 90% or more laser speckle.
2, apart from short, vibrational energy loss is low for present invention vibration transmitting, almost without equipment operation noise, single vibration device
The laser speckle of controllable 3~5 ㎡ screens is eliminated, and will not be impacted, is convenient for screen quality with use process in installation
Common screen is transformed into the vibration screen of laser projection.
3, the present invention have the advantages that structure it is simple, it is easy for installation, be hardly damaged, long service life.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the structural schematic diagram of the embodiment of the present invention one；
Fig. 2 is the lattice arrangement distribution schematic diagram one of vibration unit in the embodiment of the present invention one；
Fig. 3 is the lattice arrangement distribution schematic diagram two of vibration unit in the embodiment of the present invention one；
Fig. 4 is the structural schematic diagram of the embodiment of the present invention two；
Fig. 5 is the arrangement schematic diagram of vibration unit in the embodiment of the present invention two.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below it is right
The present invention is further described.
Embodiment one：
As shown in Figure 1 to Figure 3, a kind of screen electromagnetic oscillation device for showing elimination speckle applied to laser light source, including
Screen 1,1 back side of screen, which is equipped with, to be vibrated by the screen of electromagnetism power drive to eliminate the vibration unit 2 of speckle, and the vibration is single
Member 2 is uniformly placed with several in screen 1.
The vibration unit 2 is the contact type structure 21 for pushing directly on screen vibration.
The contact type structure 21 includes that electromagnetic coil 211, the vibration transfer layer 212 being connected in screen 1 and vibration pass
Pass that the connected vibration transmitting block 213 of layer 212, one end is connected on vibration transmitting block 213 and the other end is connected to electromagnetic coil 211
On vibrating reed 214.
The magnetic that the vibrating reed 214 is arranged in parallel in electromagnetic coil 211 occurs before the 211a of end at 1cm.
The vibration transfer layer 212 is made of the soft elastic material of thickness 0.5cm~5cm, the soft elastic material
For sponge or silica gel.
The vibration transmitting block 213 is made of the disc-shaped hard material of diameter 2cm~30cm, and the hard material is
Any one of iron, aluminium, steel, plastics, plank.
The vibrating reed 214 is made of magnetic conductive metal material, and the magnetic conductive metal material is pure iron or ferrous alloys, institute
Stating ferrous alloys can be any one of ferro-silicium, iron-nickel alloy, ferrocobalt, iron-carbon alloy.
The vibration unit 2 is in lattice arrangement on 1 back side of screen, including transversely conllinear distribution, conllinear point along longitudinal direction
Cloth.
The vibration unit 2 is in lattice arrangement on 1 back side of screen, including is transversely collinearly distributed, staggeredly divides along longitudinal direction
Cloth.
One end of the electromagnetic coil 211 is connected with power supply 3, the other end by conducting wire and is connected with electric current pressure regulation by conducting wire
Frequency modulator 4.
The surface of the electric current voltage regulation and frequency modulation device 4 be equipped with adjust voltage, electric current, frequency parameter regulation key 5, the parameter
Adjusting key 5 includes operation button, operation knob.
In the present embodiment, vibration unit 2 is placed in 1 back side of screen, vibration transfer layer 212 is made gently to touch the back of screen 1
Face, and do not make screen 1 that obvious perceptible deformation occur, recycle conducting wire by electromagnetic coil 221 and electric current voltage regulation and frequency modulation device 4,
Power supply 3 is connected, and constitutes complete electric loop, wherein the voltage and frequency in circuit is adjusted in electric current voltage regulation and frequency modulation device 4, has reached
Control the magnetic force size and magnetic field alternative frequency of electromagnetic coil 221.
In use, opening power supply 3, the screen 1 laser picture being projected under vibrational state passes through observation laser speckle
Elimination situation adjusts electric current voltage regulation and frequency modulation device 4, controls the parameters such as magnetic force, the frequency of electromagnetic coil 211, shakes to control screen 1
It is dynamic, and reach optimal speckle eradicating efficacy, after debugging out optimal speckle eradicating efficacy, it can determine electric current voltage regulation and frequency modulation device
4 parameter, be allowed to afterwards in use, may be implemented direct firing current voltage regulation and frequency modulation device 4 just reach optimal speckle elimination
Effect.
Embodiment two：
As shown in Figure 4, Figure 5, a kind of to show the screen electromagnetic oscillation device for eliminating speckle, including silver applied to laser light source
Curtain 1,1 back side of screen is evenly equipped with several and is vibrated by the screen of electromagnetism power drive to eliminate the vibration unit 2 of speckle, described
Vibration unit 2 is distributed in lattice arrangement.
The vibration unit 2 is the contactless structure 22 for driving screen vibration indirectly.
The vibration unit 2 is arranged in two sides up and down or the surrounding of screen 1 at equal intervals.
The contactless structure 22 includes electromagnetic coil 211, is connected to 1 back side of screen and is placed in electromagnetic coil 211
Permanent magnets 221 above the 211a of end occur for magnetic；1cm above the 211a of end occurs for the magnetic that the permanent magnets 221 are located at electromagnetic coil 211
Place.
One end of the electromagnetic coil 211 is connected with power supply 3, the other end by conducting wire and is connected with electric current pressure regulation by conducting wire
Frequency modulator 4.
The surface of the electric current voltage regulation and frequency modulation device 4 be equipped with adjust voltage, electric current, frequency parameter regulation key 5, the parameter
Adjusting key 5 includes operation button, operation knob.
In use, opening power supply 3, the screen 1 laser picture being projected under vibrational state passes through observation laser speckle
Elimination situation adjusts electric current voltage regulation and frequency modulation device 4, controls the parameters such as magnetic force, the frequency of electromagnetic coil 211, shakes to control screen 1
It is dynamic, and reach optimal speckle eradicating efficacy, after debugging out optimal speckle eradicating efficacy, it can determine electric current voltage regulation and frequency modulation device
4 parameter, be allowed to afterwards in use, may be implemented direct firing current voltage regulation and frequency modulation device 4 just reach optimal speckle elimination
Effect.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and what is described in the above embodiment and the description is only the present invention
Principle, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these variation and
Improvement is both fallen in claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (10)
1. a kind of show the screen electromagnetic oscillation device for eliminating speckle, including screen (1) applied to laser light source, feature exists
In：Screen (1) back side, which is equipped with, to be vibrated by the screen of electromagnetism power drive to eliminate the vibration unit (2) of speckle, the vibration
Unit (2) is uniformly placed with several on screen (1).
2. a kind of screen electromagnetic oscillation device that elimination speckle is shown applied to laser light source according to claim 1,
It is characterized in that：The vibration unit (2) is the contact type structure (21) for pushing directly on screen vibration.
3. a kind of screen electromagnetic oscillation device that elimination speckle is shown applied to laser light source according to claim 2,
It is characterized in that：The vibration transfer layer that the contact type structure (21) includes electromagnetic coil (211), is connected on screen (1)
(212), vibration transmitting block (213), the one end being connected with vibration transfer layer (212) are connected in vibration transmitting block (213) and separately
One end is connected to the vibrating reed (214) on electromagnetic coil (211).
4. a kind of screen electromagnetic oscillation device that elimination speckle is shown applied to laser light source according to claim 3,
It is characterized in that：The magnetic that the vibrating reed (214) is arranged in parallel in electromagnetic coil (211) occurs before end (211a) at 1cm.
5. a kind of screen electromagnetism for showing elimination speckle applied to laser light source according to any one of claim 1 to 4
Vibration device, it is characterised in that：The vibration unit (2) is collinearly divided on screen (1) back side, including transversely in lattice arrangement
Cloth, along longitudinal direction conllinear distribution.
6. a kind of screen electromagnetism for showing elimination speckle applied to laser light source according to any one of claim 1 to 4
Vibration device, it is characterised in that：The vibration unit (2) is collinearly divided on screen (1) back side, including transversely in lattice arrangement
Cloth is interspersed along longitudinal direction.
7. a kind of screen electromagnetic oscillation device that elimination speckle is shown applied to laser light source according to claim 1,
It is characterized in that：The vibration unit (2) is the contactless structure (22) for driving screen vibration indirectly.
8. a kind of screen electromagnetic oscillation device that elimination speckle is shown applied to laser light source according to claim 7,
It is characterized in that：The vibration unit (2) is arranged in two sides up and down or the surrounding of screen (1) at equal intervals.
9. a kind of screen electromagnetic oscillation device that elimination speckle is shown applied to laser light source according to claim 7,
It is characterized in that：The contactless structure (22) includes electromagnetic coil (211), is connected to screen (1) back side and is placed in electromagnetic wire
Enclose the permanent magnets (221) above magnetic generation end (211a) of (211)；The permanent magnets (221) are located at the magnetic of electromagnetic coil (211)
Occur above end (211a) at 1cm.
10. a kind of according to claim 3 or 8 show the screen electric and magnetic oscillation dress for eliminating speckle applied to laser light source
It sets, it is characterised in that：One end of the electromagnetic coil (211) is connected with power supply (3), the other end by conducting wire and is connected by conducting wire
There is electric current voltage regulation and frequency modulation device (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811023948.3A CN108845477A (en) | 2018-09-04 | 2018-09-04 | It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle applied to laser light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811023948.3A CN108845477A (en) | 2018-09-04 | 2018-09-04 | It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle applied to laser light source |
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| Publication Number | Publication Date |
|---|---|
| CN108845477A true CN108845477A (en) | 2018-11-20 |
Family
ID=64188974
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811023948.3A Pending CN108845477A (en) | 2018-09-04 | 2018-09-04 | It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle applied to laser light source |
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| Country | Link |
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| CN (1) | CN108845477A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286553A (en) * | 2019-06-25 | 2019-09-27 | 四川长虹电器股份有限公司 | The screen and screen system of laser speckle can be eliminated |
| CN110609394A (en) * | 2019-10-17 | 2019-12-24 | 杭州中科极光科技有限公司 | Laser speckle eliminating device and projection system |
| WO2023024528A1 (en) * | 2021-08-27 | 2023-03-02 | 深圳市时代华影科技股份有限公司 | Screen vibrator and screen vibration system |
| WO2023196195A1 (en) * | 2022-04-07 | 2023-10-12 | Dolby Laboratories Licensing Corporation | Speckle mitigation for projection screens |
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| CN105759553A (en) * | 2016-05-10 | 2016-07-13 | 郑强 | Screen speckle removing system and speckle removing method thereof |
| CN106094242A (en) * | 2016-05-10 | 2016-11-09 | 许江珂 | A kind of light field scanner for eliminating picture laser speckle |
| CN107831634A (en) * | 2017-12-12 | 2018-03-23 | 芜湖爱幕显示科技有限公司 | A kind of vibration screen for eliminating laser speckle |
| CN108319099A (en) * | 2018-03-09 | 2018-07-24 | 芜湖影星巨幕有限公司 | A kind of small vibrating device for eliminating speckle applied to laser light source projection screen |
| CN108462917A (en) * | 2018-03-30 | 2018-08-28 | 四川长虹电器股份有限公司 | Electromagnetic excitation energy converter and laser projection optics sound equipment screen and its synchronous display method |
| CN208654525U (en) * | 2018-09-04 | 2019-03-26 | 芜湖影星巨幕有限公司 | It is a kind of to show the screen electromagnetic oscillation device for eliminating speckle applied to laser light source |
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2018
- 2018-09-04 CN CN201811023948.3A patent/CN108845477A/en active Pending
Patent Citations (6)
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| CN105759553A (en) * | 2016-05-10 | 2016-07-13 | 郑强 | Screen speckle removing system and speckle removing method thereof |
| CN106094242A (en) * | 2016-05-10 | 2016-11-09 | 许江珂 | A kind of light field scanner for eliminating picture laser speckle |
| CN107831634A (en) * | 2017-12-12 | 2018-03-23 | 芜湖爱幕显示科技有限公司 | A kind of vibration screen for eliminating laser speckle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110286553A (en) * | 2019-06-25 | 2019-09-27 | 四川长虹电器股份有限公司 | The screen and screen system of laser speckle can be eliminated |
| CN110609394A (en) * | 2019-10-17 | 2019-12-24 | 杭州中科极光科技有限公司 | Laser speckle eliminating device and projection system |
| WO2023024528A1 (en) * | 2021-08-27 | 2023-03-02 | 深圳市时代华影科技股份有限公司 | Screen vibrator and screen vibration system |
| WO2023196195A1 (en) * | 2022-04-07 | 2023-10-12 | Dolby Laboratories Licensing Corporation | Speckle mitigation for projection screens |
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