CN101246301A - Projection device - Google Patents
Projection device Download PDFInfo
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- CN101246301A CN101246301A CNA2007100052311A CN200710005231A CN101246301A CN 101246301 A CN101246301 A CN 101246301A CN A2007100052311 A CNA2007100052311 A CN A2007100052311A CN 200710005231 A CN200710005231 A CN 200710005231A CN 101246301 A CN101246301 A CN 101246301A
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- catoptron
- light
- reflecting surface
- monochromatic source
- projection
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Abstract
A projection device comprises body and optical train. The body is provided with a first project ostium and a second ostium from which first image and second image are projected respectively, the optical train is set in the body.
Description
Technical field
The present invention relates to a kind of projection arrangement, relate to a kind of projection arrangement that can throw a plurality of images simultaneously.
Background technology
Because personal electronic device is compactization day by day, the user has faced the problem of sharing video frequency archives (as photo, bulletin, film etc.) simply, and one of shortcoming of microminiaturized portable electronic device be can't be as the keyboard that uses personal computer, can import data apace, therefore reduced the efficient of human-computer interaction, and minitype projection module is one of effective scheme that addresses the above problem.In the minitype projection machine of a new generation, Portable led light source projector based on firm importing market, but still there are many obstacles in it, can influence life-span of LED and luminescence efficiency, heat dissipation problem, need accurate factors such as focus lens as the not good operating temperature that causes module brightness to be difficult to promote, improve when increasing brightness of photoelectric transformation efficiency; The restriction of its mechanical-optical setup of this external cause, though cause it can be contracted to hand size, but still can't the breakthrough volume restriction and be integrated within the electronic apparatus, so the micro projection mechanism of non-the best still.In other relevant micro projection technology, shadow casting technique is expected most with miniature laser, it mainly is light source with laser, collocation MEMS miniscanning catoptron is an operating principle, this framework can be accomplished the volume also littler than matchbox, therefore is the projection mechanism that is built in mobile device in the following energy of having an opportunity most.Therefore creation motivation of the present invention is to expect that following mobile phone will not only need screen of projection, but at least two screen images, for example while projection screen picture and dummy keyboard so can be imported and operate personal data fast, and reach the function of mobile computer; Two screen images also can be incident upon same plane in addition, and realize the effect of screen size multiplication; So create a kind of device that can biplane projection with this notion.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of projection arrangement that can throw a plurality of images simultaneously.
The preferred embodiment of projection arrangement of the present invention comprises body and optical system.Body is provided with first projection mouthful and second projection mouthful, and optical system is located in the body, and mouthful projects first image and second image with the second projection mouth from first projection respectively.
In above-mentioned preferred embodiment, optical system comprises: the LASER Light Source and first catoptron.LASER Light Source comprises a plurality of monochromatic sources.First catoptron has first reflecting surface and second reflecting surface, corresponds respectively to this first projection mouth and this second projection mouth.Light from this LASER Light Source, be incident in this first reflecting surface and this second reflecting surface respectively, and by the reflection of this first reflecting surface and this second reflecting surface and project this first image and this second image from this first projection mouthful and this second projection mouth respectively.
In above-mentioned preferred embodiment, LASER Light Source comprises first monochromatic source, second monochromatic source, the 3rd monochromatic source.
In above-mentioned preferred embodiment, above-mentioned optical system more comprises light-dividing device, light from first monochromatic source is distinguished incident first reflecting surface and second reflecting surface via light-dividing device, and only is incident in second reflecting surface from the light of second monochromatic source and the 3rd monochromatic source
In above-mentioned preferred embodiment, above-mentioned optical system more comprises the 4th monochromatic source, the 5th monochromatic source and the 6th monochromatic source, light from the 4th monochromatic source, the 5th monochromatic source and the 6th monochromatic source is incident in first reflecting surface, and is incident in this second reflecting surface from the light of first monochromatic source, second monochromatic source and the 3rd monochromatic source.
In above-mentioned preferred embodiment, first catoptron more comprises first turning axle, when the light from LASER Light Source was incident in first catoptron, first catoptron was that swing in suitable angular range at the center with first turning axle, and produces first image and second image respectively.
In above-mentioned preferred embodiment, optical system more comprises second catoptron and the 3rd catoptron, have second turning axle and the 3rd turning axle respectively, be incident in second catoptron from the light of first reflecting surface reflection, and be that the center is swung in suitable angle and produced first image with second turning axle by second catoptron, be incident in the 3rd catoptron from the light of second reflecting surface reflection, and be that the center is swung in suitable angle and produced second image with the 3rd turning axle by the 3rd catoptron.
In above-mentioned preferred embodiment, first catoptron more comprises second turning axle, when the light from LASER Light Source is incident in first catoptron, first catoptron is that swing in suitable angular range at the center with first turning axle, and first catoptron is that the center is swung in suitable angular range and produced first image and second image respectively with second turning axle then.
In above-mentioned preferred embodiment, optical system more comprises drive unit, and driving first catoptron is that the center rotates in suitable angular range with first turning axle.Drive unit can electromagnetic type, the mode of electrostatic, electrothermal, piezoelectric type or memorial alloy drives first catoptron.
For above-mentioned and other purposes of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and cooperate appended diagram, be described in detail below:
Description of drawings
Fig. 1 a, 1b are the stereographic map of a preferred embodiment of projection arrangement of the present invention.
Fig. 2 a is the synoptic diagram of an embodiment of the optical system of projection arrangement of the present invention.
Fig. 2 b is the synoptic diagram of the first mirror reflects light beam.
Fig. 3 is the synoptic diagram of the main structure of first catoptron.
Fig. 4 is the synoptic diagram of another embodiment of optical system,
Fig. 5 is the synoptic diagram of another embodiment of optical system,
The synoptic diagram of another embodiment of Fig. 6 optical system,
Fig. 7 is the synoptic diagram of another embodiment of optical system.
Fig. 8 a is the synoptic diagram of another embodiment of first catoptron of the present invention.
Fig. 8 b is the synoptic diagram of the first mirror reflects light beam of Fig. 8 a.
Fig. 8 c is the synoptic diagram of another embodiment of first catoptron of the present invention.
Fig. 9 a, 9b are the synoptic diagram of another embodiment of the body of projection arrangement of the present invention.
Figure 10 is the system diagram that throws the projection arrangement of a plurality of images of the present invention.
Description of reference numerals
12 catoptrons, 14,16,17 catoptrons
18,19 optical mirror slips, 100 bodies
120 first projections mouthful 140 second projection mouths
150 pedestals, 170 projecting cells
200 optical systems, 220 LASER Light Source
221 first monochromatic sources, 222 second monochromatic sources
223 the 3rd monochromatic sources 224 the 4th monochromatic source
225 the 5th monochromatic sources 226 the 6th monochromatic source
230,231,232,233 optical splitters, 235 light modulators
240 first catoptrons, 241 supportive bodies
242 first reflectings surface, 243 torsion beam
244 second reflectings surface, 245 substrates
246 second torsion beam, 247 drive coils
248,249 magnet, 250 comb electrodes
260 second catoptrons 280 the 3rd catoptron
1000 mobile phones, 2411,2412,2451 comb electrodes
The A1 first turning axle A2 second turning axle
A3 the 3rd turning axle L1 light beam
The L2 light beam
Embodiment
Fig. 1 a, 1b are the stereographic map of a preferred embodiment of projection arrangement of the present invention.Do explanation though the projection arrangement among Fig. 1 a, the 1b is example with the mobile phone, be not limited to mobile phone.Wherein Fig. 1 a watches from the front, and Fig. 1 b watches from the back side.Mobile phone 1000 comprises body 100 and 120 and second projection 140 of the first projection mouth, and wherein the first projection mouth 120 is the fronts that are arranged at body 100, and the second projection mouth 140 is the back side that is arranged at body 100.Be provided with optical system described later in body 100, can project first image from the first projection mouth 120, project second image from the second projection mouth 140, first image can be the image of dummy keyboard, and second image can be film or image.
Fig. 2 a is the synoptic diagram of an embodiment of the optical system in the body 100.Optical system 200 comprises LASER Light Source 220, first catoptron 240, second catoptron 260 and the 3rd catoptron 280.LASER Light Source 220 comprises first monochromatic source 221, second monochromatic source 222, the 3rd monochromatic source 223 and the 4th monochromatic source 224, in the present embodiment, first monochromatic source 221 is a red-light source, second monochromatic source 222 is a green-light source, the 3rd monochromatic source 223 is a blue light source, and the 4th monochromatic source 224 is a red-light source.From the light beam of the 4th monochromatic source 224 by catoptron 12 reflections after, be incident in first catoptron 240, after compiling by optical mirror slip 18,19 and from the light beam of second monochromatic source 222 and the 3rd monochromatic source 223 by catoptron 17 reflection backs from the light beam of first monochromatic source 221, after catoptron 16 reflections, be incident to first catoptron 240. Optical mirror slip 18,19 possesses high pass or low pass filtered luminous energy power, forms light beam and compiles element, will be incident in this first catoptron 240 from the light of this monochromatic source after the pooling.
Fig. 2 b is the synoptic diagram of first catoptron, 240 folded light beams.First catoptron 240 has first reflecting surface 242 and second reflecting surface 244,12 beam reflected L1 are incident in first reflecting surface 242 via catoptron, after 242 reflections of first reflecting surface, be incident in second catoptron 260, then by first projection mouthful 120 formation, first image.17 beam reflected L2 then are incident in second reflecting surface 244 via catoptron, after changing direct of travel by catoptron 14 then, be incident in the 3rd catoptron 280, then by second projection mouthful 140 formation, second image, because second image is to be mixed by three kinds of coloured light, be coloured image therefore.Below how explanation forms first image and second image.First catoptron 240 has the first turning axle A1, and second catoptron 260 has the second turning axle A2, and the 3rd catoptron 280 has the 3rd turning axle A3, and the second turning axle A2 and the 3rd turning axle A3 are all vertical with the first turning axle A1.When light beam L1 is projected to screen via first reflecting surface 242 and second catoptron 260, second catoptron 260 is that swing in suitable angle at the center with the second turning axle A2, make light beam L1 on screen, do horizontal fast scan, and first catoptron 240 is that swing in suitable angle at the center with the first turning axle A1, make light beam L1 on screen, do fast scan longitudinally, so can on screen, form first image of two dimension.Similarly light beam L2 is that the center swings in suitable angle that to make light beam L2 be that swing at the center doing the horizontal fast scan and first catoptron 240 on the screen with the first turning axle A1 by the 3rd catoptron 280 in suitable angle with the 3rd turning axle A3 also, makes light beam L2 do fast scan longitudinally on screen and forms second image of two dimension.
When feeding alternating current to drive coil 247, drive coil 247 can be had an effect with the magnetic field of magnet 249, first catoptron 240 can reverse along the direction of electromagnetic force effect, when the different light beams of twice are incident to first, second reflecting surface 242,244, after first catoptron 240 can be done swing fast with level or vertical direction, with beam reflection to the second catoptron 260 or the 3rd catoptron 280, project two dimensional image at last.Substrate 245 is selected suitable material for use according to required oscillation frequency, as glass or acryl resin etc., and make as copper drive coil 247 in modes such as plating or electroforming thereon, wherein this drive coil mode that can three-dimensional stack is made, to increase coil number, the middle part then plate or paste as reflective metal films such as aluminium or chromium to form reflecting surface reflect beams of laser light, another side is also made reflecting surface with aforesaid same way as.
Except above-mentioned electromagnetic mode drives the rotation of first catoptron 240, can also adopt the mode of electrostatic, electrothermal, piezoelectric type or memorial alloy to drive.
Fig. 4 is the synoptic diagram of another embodiment of optical system 200, in the present embodiment, the 4th monochromatic source 224, the 5th monochromatic source 225 and the 6th monochromatic source 226 are set more, wherein the 4th monochromatic source 224 is a red-light source, the 5th monochromatic source is that green-light source 225, the six monochromatic sources 226 are blue light source.The light of first, second and third monochromatic source 221,222,223 is incident to first catoptron 240 and forms first image via second catoptron 260, four, the light of the 5th and the 6th monochromatic source 224,225,226 is incident to first catoptron 240 and forms second image via the 3rd catoptron 280, so two images can throw same plane, form two screen images, or engage two image boundaries and form the wide cut image, because first, second image is three kinds of monochromatic light and mixes, therefore be coloured image.
Fig. 5 is the synoptic diagram of another embodiment of optical system 200, in the present embodiment, first, second and third monochromatic source 221,222,223, optical splitter 230 and two light modulators 235 only is set, and all the other are identical with the embodiment of Fig. 2 a.Light from first monochromatic source 221 is divided into the twice light beam via optical splitter 230, one of them is by light modulator 235 and by after catoptron 12 reflections, be incident in first catoptron 240, after another road light beam compiles by optical mirror slip 18,19 and from the light beam of second monochromatic source 222 and the 3rd monochromatic source 223 by another light modulator 235 and by catoptron 17 reflection back, after catoptron 16 reflections, be incident to first catoptron 240.All the other are identical with the embodiment shown in Fig. 2 a.
Fig. 6 is the synoptic diagram of another embodiment of optical system 200, is that with a last embodiment difference a last embodiment only is provided with optical splitter 230, and only the light beam of first monochromatic source 221 is by beam split, and therefore first image is the image of a monochrome.In the present embodiment, be provided with three optical splitters 231,232 and 233 altogether, correspond respectively to first monochromatic source 221, second monochromatic source 222 and the 3rd monochromatic source 223, therefore the light beam of three monochromatic sources is all by minute twice, after process light modulator 235 converges, be incident to first reflecting surface 242 and second reflecting surface 244 respectively, form first image and second image via second catoptron 260 and second catoptron 280 respectively then.In this enforcement, first image and second image are coloured image.
Except using two catoptrons such as first catoptron 240 and second catoptron 260 to form the image of two dimension, also can on a catoptron, form two turning axles, so can use a catoptron that light beam is scanned on both direction and form the two dimension image.Fig. 7 is the synoptic diagram of another embodiment of optical system 200.Compare with the embodiment of Fig. 2 a,, therefore omitted second, third catoptron 260 and 280 because first catoptron 240 has two turning axles.Fig. 8 a is the synoptic diagram of first catoptron 240 of present embodiment.First catoptron 240 comprises supporting construction 241, two substrates 245 that first torsion beam 243 links to each other with two torsion beam 243 both sides and two second torsion beam 246.First torsion beam 243 forms the first turning axle A1, and second torsion beam 246 forms the second turning axle A2.Can on supporting construction 241 and substrate 245, coil be set, and around supporting construction 241, magnet 248 is set corresponding to first torsion beam 243 and second torsion beam, 246 places, making substrate 245 by the structure as the magnet of Fig. 3 and coil then is the center rotation with the first turning axle A1 and the second turning axle A2, magnet 248 is placed on the direction of oblique angle 45 degree of supporting construction 241, also can reach effect same.Fig. 8 b represents to form first image of two dimension and the synoptic diagram of second image simultaneously with first catoptron 240, compares with Fig. 2 b, and present embodiment only needs first catoptron 240 to reach.
Fig. 8 c represents that another kind has the synoptic diagram of another embodiment of first catoptron 240 of two turning axles.This is a kind of electrostatic structure, form outward extending comb electrode 2411 in the both sides of supporting construction 241, be provided with comb electrode 250 in the outside of supporting construction 241, corresponding to comb electrode 2411, simultaneously be provided with comb electrode 2412 in the inboard of supporting construction 241, the outside at substrate 245 also is provided with comb electrode 2451, corresponding to comb electrode 2412, when comb electrode 2411 and 250 has potential difference (PD), can make supporting construction 241 serves as the axle rotation with second torsion beam 246, torsion beam 246 depends on supporter (not shown), when comb electrode 2412 and 2451 has potential difference (PD), can make substrate 245 serves as the axle rotation with first torsion beam 243, so can produce the effect identical with first catoptron of Fig. 8 a.
Fig. 9 a, 9b are the synoptic diagram of another embodiment of body 100.In the 9th figure, body 100 comprises pedestal 150 and projecting cell 170.Projecting cell 170 rotatably is incorporated into pedestal 150, the first projections mouthful 120 and second 140 in a projection mouth and is located at respectively on the projecting cell 170.
In the various embodiments described above, be to be example with the projection arrangement that projects two images, illustrate that the present invention uses the catoptron with double-reflecting face, project two two dimensional images simultaneously,, can adopt a plurality of catoptrons with double-reflecting face if desire to project plural image, as shown in figure 10, use a plurality of LASER Light Source 220, and row first catoptron 240 and row second catoptron 260 are set, and produce a plurality of two dimensional images.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when by being as the criterion that claim defined.
Claims (21)
1. projection arrangement comprises:
Body is provided with the first projection mouth and the second projection mouth; And
Optical system is located in this body, and projects first image and second image from this first projection mouth and this second projection mouth respectively.
2. projection arrangement as claimed in claim 1, wherein this optical system comprises:
LASER Light Source comprises a plurality of monochromatic sources; And
First catoptron, have first reflecting surface and second reflecting surface, correspond respectively to this first projection mouth and this second projection mouth, wherein, light from this LASER Light Source, be incident in this first reflecting surface and this second reflecting surface respectively, and by the reflection of this first reflecting surface and this second reflecting surface and project this first image and this second image from this first projection mouthful and this second projection mouth respectively.
3. projection arrangement as claimed in claim 2, wherein this LASER Light Source comprises first monochromatic source, second monochromatic source, the 3rd monochromatic source
4. projection arrangement as claimed in claim 3, wherein this optical system more comprises light-dividing device, light from this first monochromatic source is distinguished this first reflecting surface of incident and this second reflecting surface via this light-dividing device, and only is incident in this second reflecting surface from the light of this second monochromatic source and the 3rd monochromatic source.
5. projection arrangement as claimed in claim 3, wherein this optical system more comprises light-dividing device and light modulator, is incident in this first reflecting surface and this second reflecting surface from the light of this first monochromatic source, this second monochromatic source and the 3rd monochromatic source respectively after via this light-dividing device and this light modulator.
6. projection arrangement as claimed in claim 3, wherein this optical system more comprises the 4th monochromatic source, light from the 4th monochromatic source is incident in this first reflecting surface, then is incident in this second reflecting surface from the light of this first monochromatic source, this second monochromatic source and the 3rd monochromatic source.
7. projection arrangement as claimed in claim 6, wherein this first, second, third, fourth monochromatic source is semiconductor laser light resource.
8. projection arrangement as claimed in claim 3, wherein this optical system more comprises the 4th monochromatic source, the 5th monochromatic source and the 6th monochromatic source, light from the 4th monochromatic source, the 5th monochromatic source and the 6th monochromatic source is incident in this first reflecting surface, and is incident in this second reflecting surface from the light of this first monochromatic source, this second monochromatic source and the 3rd monochromatic source.
9. projection arrangement as claimed in claim 8, wherein this first, second, third, fourth, the 5th and the 6th monochromatic source is a semiconductor laser light resource.
10. projection arrangement as claimed in claim 2, wherein this first catoptron more comprises first turning axle, when the light from this LASER Light Source is incident in this first catoptron, this first catoptron is that swing in suitable angular range at the center with this first turning axle, and produces this first image and this second image respectively.
11. projection arrangement as claimed in claim 10, wherein this optical system more comprises second catoptron and the 3rd catoptron, have second turning axle and the 3rd turning axle respectively, be incident in this second catoptron from the light of this first reflecting surface reflection, and be that the center is swung in suitable angle and produced this first image with this second turning axle by this second catoptron, be incident in the 3rd catoptron from the light of this second reflecting surface reflection, and be that the center is swung in suitable angle and produced this second image with the 3rd turning axle by the 3rd catoptron.
12. projection arrangement as claimed in claim 11, wherein this second turning axle is all vertical with this first turning axle with the 3rd turning axle.
13. projection arrangement as claimed in claim 10, wherein this first catoptron more comprises second turning axle, when the light from this LASER Light Source is incident in this first catoptron, this first catoptron is that swing in suitable angular range at the center with this first turning axle, and this first catoptron is that the center is swung in suitable angular range and produced this first image and this second image respectively with this second turning axle then.
14. projection arrangement as claimed in claim 13, wherein this first turning axle and this second turning axle are orthogonal.
15. projection arrangement as claimed in claim 10, wherein this optical system more comprises drive unit, and driving this first catoptron is that the center rotates in this suitable angular range with this first turning axle.
16. projection arrangement as claimed in claim 15, wherein this drive unit drives in the mode of electromagnetic type, electrostatic, electrothermal, piezoelectric type or memorial alloy.
17. projection arrangement as claimed in claim 3, wherein this optical system comprises that more light beam compiles element, compiles via this light beam from the light of this monochromatic source to be incident in this first catoptron after element compiles.
18. projection arrangement as claimed in claim 17, wherein this light beam compiles element and comprises the optical mirror slip that possesses high pass or low pass filtered luminous energy power at least, makes the light beams of different wavelengths of the both sides of its filter wavelength scope that sets produce the phenomenon that penetrates or reflect.
19. projection arrangement as claimed in claim 2, wherein this LASER Light Source comprises first monochromatic source and second monochromatic source, light from this first monochromatic source is incident in this first catoptron, is incident in this second catoptron from the light of this second monochromatic source.
20. projection arrangement as claimed in claim 1, wherein this body comprises pedestal and projecting cell, and this projecting cell rotatably is located on this pedestal, and this first projection mouth is located on this projecting cell with this second projection mouth.
21. a projection arrangement comprises:
Body is provided with a plurality of projections mouths; And
Optical system is located in this body, and projects a plurality of images from this projection mouth respectively, comprising:
LASER Light Source; And
A plurality of catoptrons, the catoptron of part has first reflecting surface and second reflecting surface, and the catoptron of another part only has first reflecting surface, this catoptron is corresponding to this projection mouth, wherein, from the light of this LASER Light Source, be incident in this first reflecting surface and this second reflecting surface respectively, and by the reflection of this first reflecting surface and this second reflecting surface and mouthful project this image from this projection respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100052311A CN101246301A (en) | 2007-02-12 | 2007-02-12 | Projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100052311A CN101246301A (en) | 2007-02-12 | 2007-02-12 | Projection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101246301A true CN101246301A (en) | 2008-08-20 |
Family
ID=39946825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100052311A Pending CN101246301A (en) | 2007-02-12 | 2007-02-12 | Projection device |
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| CN (1) | CN101246301A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404009A (en) * | 2014-07-31 | 2016-03-16 | 欧司朗有限公司 | Optical engine for optical projection device, and optical projection device |
| WO2018141112A1 (en) * | 2017-02-06 | 2018-08-09 | Goertek. Inc | Micro laser diode projector and electronics apparatus |
| CN109946909A (en) * | 2017-12-21 | 2019-06-28 | 中强光电股份有限公司 | Projection arrangement |
| CN112305845A (en) * | 2020-11-13 | 2021-02-02 | 歌尔光学科技有限公司 | Projection light path and projection equipment |
| CN113556523A (en) * | 2021-07-09 | 2021-10-26 | 湖州师范学院 | Virtual reality live-action projection system |
| CN115016125A (en) * | 2022-07-07 | 2022-09-06 | 业成科技（成都）有限公司 | Image generation module, head-up display system and vehicle |
-
2007
- 2007-02-12 CN CNA2007100052311A patent/CN101246301A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105404009A (en) * | 2014-07-31 | 2016-03-16 | 欧司朗有限公司 | Optical engine for optical projection device, and optical projection device |
| WO2018141112A1 (en) * | 2017-02-06 | 2018-08-09 | Goertek. Inc | Micro laser diode projector and electronics apparatus |
| US11099467B2 (en) | 2017-02-06 | 2021-08-24 | Goertek Inc. | Micro laser diode projector and electronics apparatus |
| CN109946909A (en) * | 2017-12-21 | 2019-06-28 | 中强光电股份有限公司 | Projection arrangement |
| CN109946909B (en) * | 2017-12-21 | 2022-10-04 | 中强光电股份有限公司 | Projection device |
| CN112305845A (en) * | 2020-11-13 | 2021-02-02 | 歌尔光学科技有限公司 | Projection light path and projection equipment |
| CN113556523A (en) * | 2021-07-09 | 2021-10-26 | 湖州师范学院 | Virtual reality live-action projection system |
| CN115016125A (en) * | 2022-07-07 | 2022-09-06 | 业成科技（成都）有限公司 | Image generation module, head-up display system and vehicle |
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Application publication date: 20080820 |