CN109884843A - Projector - Google Patents
Projector Download PDFInfo
- Publication number
- CN109884843A CN109884843A CN201810148522.4A CN201810148522A CN109884843A CN 109884843 A CN109884843 A CN 109884843A CN 201810148522 A CN201810148522 A CN 201810148522A CN 109884843 A CN109884843 A CN 109884843A
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- Prior art keywords
- light
- filter
- optical element
- optical
- illuminating bundle
- 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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- 230000003287 optical effect Effects 0.000 claims abstract description 123
- 239000011248 coating agent Substances 0.000 claims abstract description 34
- 238000000576 coating method Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 21
- 238000005286 illumination Methods 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 230000013011 mating Effects 0.000 claims 1
- 238000001914 filtration Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 7
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- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 230000005374 Kerr effect Effects 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
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- 210000002858 crystal cell Anatomy 0.000 description 1
- KPHWPUGNDIVLNH-UHFFFAOYSA-M diclofenac sodium Chemical compound [Na+].[O-]C(=O)CC1=CC=CC=C1NC1=C(Cl)C=CC=C1Cl KPHWPUGNDIVLNH-UHFFFAOYSA-M 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- Projection Apparatus (AREA)
- Optical Filters (AREA)
Abstract
A kind of projector includes the optical element of light source, equal optical element, light valve and light-permeable.The exportable illuminating bundle of light source, and optical element, light valve and optical element are set in the transmission path of illuminating bundle.Optical element is set between light valve and equal optical element and is located in the transmission path of illuminating bundle, and the surface of optical element is equipped with filter coating, and the completely illuminated light beam of the filter coating is covered.
Description
Technical field
The present invention relates to a kind of projector more particularly to a kind of projectors with the preferred image uniformity.
Background technique
The image that projector is projected out, because being influenced to be easy to cause by material absorption or glasses lens plated equal various factors
The intensity distribution of tri- kinds of colors of RGB is inconsistent, causes image chroma uniformity bad, such as certain a shade intensity of middle section
Compared with strong, coloured light described in surrounding is relatively weak.It so can not meet the equal specification requirement of color, such as whole image white chromaticity coordinates
Difference value need to requirement less than 0.005.When being spliced into TV spelling wall image using more projectors, can more be highlighted in seam crossing
The bad problem of the color of image uniformity out reduces the overall quality and visual effect of stitching image.
Summary of the invention
The present invention provides a kind of projector, the optical element including light source, equal optical element, light valve and light-permeable.Light source
Exportable illuminating bundle, and optical element, light valve and optical element are set in the transmission path of illuminating bundle.Optical element is set to
Between light valve and equal optical element and it is located in the transmission path of illuminating bundle, the surface of optical element is equipped with filter coating, and filters
The completely illuminated light beam of light film is covered.
The present invention provides a kind of projectors, integrator, light valve, optics in the transmission path including being set to illuminating bundle
Element and optical filter.Optical element and optical filter are set between light valve and integrator, and effective filter range of optical filter is less than
The illuminating bundle range of optical filter position.
The present invention provides a kind of projectors, by the way that on optical element surface or between different optical elements, setting can
The filtering structure for filtering out or weakening the relatively stronger coloured light of specific region intensity, can improve the colour brightness of image section region
Height, and the problem of intensity distribution unevenness is compared with other coloured light, meet the requirement of the equal specification of color.Furthermore it is projected when using more
Machine is spliced into TV when spelling wall image, because each projected image has good color uniformity, therefore spliced general image
Color change is more smooth and has preferable visual effect.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Fig. 1 is projector's embodiment schematic diagram of the invention.
Fig. 2 is another embodiment schematic diagram of projector of the invention.
Fig. 3 is another embodiment schematic diagram of projector of the invention.
Fig. 4 is another embodiment schematic diagram of projector of the invention.
Fig. 5 is another embodiment schematic diagram of projector of the invention.
Fig. 6 A and Fig. 6 B show use or the white light intensity area distribution map that unused feux rouges filter filters respectively.
Specific embodiment
Referring to Fig. 1, Fig. 1 draws the schematic diagram for having stated the projector of one embodiment of the invention.In projector 1, according to Mingguang City
The transmission path of beam, sequentially include light source 10 in the transmission path of illuminating bundle, equal optical element 12, deviation mirror 14,
Optical element 16, filter coating 20, optical element 22 and light valve 30.Light source 10 provides illuminating bundle I.Optical element 22 is set to light
Between valve 30 and optical element 12.
In this specific embodiment, light source 10 can be existing thermoelectricity light source, fluorescent lamp, light emitting diode, lasing fluorescence two
Pole tube light-emitting element or other can provide the device or element of illumination light.In this example, light source 10 is encapsulated and has fluorescent
The white light emitting diode illuminating module of powder.
In the present invention, " equal optical element " 12 refers to lens array (LENS ARRAY), integral pillar (INTEGRATE
ROD), rotatable prism etc. can be used for the various elements or mould group of equal, even light.In this example, equal optical element 12 is solid product
Divide column.
In this example, deviation mirror 18 can be plane, concave surface or convex reflecting mirror；Its reflecting surface can be non-spherical surface
It or is free form surface.In this example, deviation mirror is plane mirror, can indirect illumination light.
There is the material that partly or entirely can be reflected or penetrate to be constituted for " optical element " term of the invention, finger element,
It generally includes glass or plastic cement is formed.For example, optical element can be lens, total reflection prism (TIR Prism), anti-
To total-reflection prism group (RTIR Prism), various integrators, various optical filters etc..In this specific embodiment, optical element
16 biconvex lens for being positive for diopter and at least some light being allowed to pass through.
In this specific embodiment, the kenel of filter coating 20 is not limited, and be not limited to it is membranaceous, can also be stick formula filter
Light diaphragm, plated film, optical filtering part are seeped miscellaneous optical surface, with optical surface or element for filtering out specific wavelength ability etc..
In this example, filter coating 20 be can at least filtration fraction red range wavelength optical coating, the only filtrable light of filter coating 20
Line is not limited with red, and can be that e.g. blue and green light, UV, IR or the light with particular polarity also may be used.
In this specific embodiment, optical element 22 can be field lens, the total internal reflection prism as composed by more pieces of prisms
(TIR PRISM) or inverse type total internal reflection prism group (RTIR PRISM) including single prism.In this present embodiment, light
It learns element 22 and is formed by total internal reflection prism group by two pieces of full prisms for one, each incidence surface and light-emitting surface of optical element 22 are equal
For plane.
Light valve (Light valve) 30 1 words have been that projection production circle is widely used, and can be used to refer to one mostly in this industry
Some Individual optical units in kind spatial light modulator (Spatial Light Modulator, SLM).So-called spatial light tune
Become device, containing there are many separate unit (Individual optical unit), these separate units are spatially arranged in one-dimensional or two-dimensional array.
Each unit can independently receive the control of optical signalling or electrical signal, using various physical effects (bubble Ke Ersi effect,
Kerr effect, acoustooptical effect, magneto-optic effect, the Self Electro-optic Effect of semiconductor or photorefractive effect etc.) change itself optics it is special
Property, so that the illuminating bundle to illumination in multiple separate units is modulated, and image output light beam.Separate unit can be miniature
The optical elements such as reflecting mirror or liquid crystal cells.Light valve can be digital micromirror elements (Digital Micro-mirror
Device, DMD), silica-based liquid crystal panel (liquid-crystal-on-silicon panel, LCOS Panel) or penetrate
Formula liquid crystal display panel etc..
And projector is in the way of optical projection by the device on image projecting to screen, and in projector's industry, one
As according to light valve 30 used in inside difference, by projector be divided into cathode-ray tube (Cathode Ray Tube) formula projection
Machine, liquid crystal display (Liquid Crystal Display, LCD) formula projector, digital light projection machine (Digital Light
Projector, DLP) and liquid crystal cover silicon (Liquid Crystal on Silicon, LCOS) projector.Because projector operates
When light can use the projection of the light valves such as LCOS, DLP by LCD panel as light valve, so belong to penetration projector
Machine is then the principle imaging by light reflection, so referred to as opaque projector.And in this present embodiment, projector is number
Light projector, and light valve 30 is digital micromirror elements (DMD).
In this present embodiment, illuminating bundle I can be exported after light valve 30 is converted to image strip via optical element 22, and
When filter coating 20 is outside the transmission path for being set to image strip, the imaging of image strip less will affect, preferably to set
Meter.Filter coating 20 may be provided at the light-entering surface of optical element 22 (total reflection prism).As shown in Figure 1, what light source 10 issued
After illuminating bundle I is homogenized via equal optical element 12, lens L is passed through, enters total internal reflection prism 22 via filter coating 20 and projects
To light valve 30.Filter coating 20 can provide the effect for filtering out or weakening specific coloured light, if there is image region coloured light intensity excessively high
The weaker problem in periphery, the filter coating 20 being set on 22 surface of total internal reflection prism can weaken the coloured light in the region
Intensity improves the problem of projected image coloured light intensity distribution unevenness.
For example, if the picture centre feux rouges that is projected out of projector 10 is relatively strong, periphery feux rouges is weaker, can be used for example
Feux rouges filter (dichroic mirror-RED), which filters out or weakens, to be passed through total internal reflection prism 22 by center portion and enters light valve
30 feux rouges improves the color homogeneity of image entirety.
Fig. 2 draws the schematic diagram for having stated the projector of another embodiment of the present invention.In this present embodiment, the optical filtering of projector 2
Film 20 may be provided at the side to light LS of lens 16 and in the transmission path of illuminating bundle I.Only illustrate to draw in Fig. 2 single
Lens 16, but those of ordinary skill in the art are when can understand between equal optical element 14 and light valve 30 can be equipped with multiple lens, and are equipped with
The optical element 22 of filter coating 20 can be in these lens near light valve 30 or the lens 16 of total internal reflection prism 22.Set on saturating
The filter coating 20 of the side to light LS of mirror 16 can equally reflect, absorb or the means such as wavelength convert filter or weaken specific region
The relatively stronger coloured light of intensity keeps the light color into light valve different zones uniform.It should be noted filter coating 20 on lens 16
Forming position do not limit, in another embodiment, filter coating 20 can also be formed in the light-emitting surface LS ' of lens 16, or simultaneously
The different zones being formed on side to light LS and light-emitting surface LS '.
In the above embodiments, be set to 22 surface of optical element filter coating 20 can completely illuminated light beam I contained
Lid.For example, as shown in Figures 1 and 2, the filter coating 20 for being set to 22 surface of optical element falls completely within equal 14 institute of optical element
In the regional scope that the outermost edge MR of the light beam of sending is defined.Also even illuminating bundle I is in filter coating 20 along vertical optical axis
The extension plane in direction forms a view field, and the edge MR of view field is as depicted in Fig. 1,2.Filter coating 20 can be fallen completely within
In the view field, and the entire area of filter coating 20 can be less than illuminating bundle I in the view field of filter coating 20 position
Area.
Fig. 3 draws the schematic diagram for having stated the projector of another embodiment of the present invention.In this present embodiment, projector 3 includes
Light source 10, integrator 12 ', lens 16, optical filter 20 ', total internal reflection prism 22 and light valve 30.
" integrator " 12 ' term of the invention or light integrators, can be used for the homogenization of light.Integrator can be divided into two
Kind pattern, i.e. lens array (LENS ARRAY) or integral pillar (INTEGRATE ROD).Integral pillar light integrators can be
The bar of hollow or non-hollow construction, rod integrator.And lens array column integrator can be a fly's-eye lens.In this example,
Integrator 12 ' is a solid integration rod.
In this specific embodiment, light source 10 is an encapsulated and luminous mould of white light emitting diode with phosphor powder
Group, it is possible to provide an illuminating bundle I.Integrator 12 ', light valve 30, lens 16 and total internal reflection prism 22 are set on illuminating bundle I's
In transmission path.One optical filter (filter) 20 ' is set to the transmission between integrator 12 ' and light valve 30 and being located at illuminating bundle I
On path.In this present embodiment, optical filter 20 ' can be between lens 16 and total internal reflection prism 22, and optical filter 20 ' has
Imitate the illuminating bundle range that filter range is less than 20 ' position of optical filter.Refer in optical filter in this " effective filter range "
There is the whole region of colour filter ability, if the periphery of optical filter there are filtering capabilities, even if dull thread passes through, also belongs to effective optical filtering model
The a part enclosed.Furthermore illuminating bundle I can form view field, institute in extension plane of the optical filter 20 ' along vertical optical axis direction
State the illuminating bundle range that view field is 20 ' position of optical filter.Optical filter 20 ', which equally can provide, filters out or weakens spy
The effect for determining the relatively stronger coloured light of field strength, improves the color homogeneity of projected image.Optical filter 20 ' is in integrator 12 '
Setting position between light valve 30 does not limit, as shown in figure 4, optical filter 20 ' also may be disposed at the integrator of projector 4
Between 12 ' (or deviation mirrors 14) and lens 16.
In above-described embodiment, the kenel of optical filter 20 ' does not limit and is not limited to sheet, can also be diaphragm, plated film,
Optical filtering part etc., such as attenuator, colored filter, high-pass/low-pass optical filter, bandpass filter, dichronic mirror, as its example.
In this example, optical filter 20 ' is an attenuator that can filter feux rouges to scale.Furthermore optical filter 20 ' can be independently arranged and can lead to
A supporting element 28 support is crossed in the optical path between integrator 12 ' and total internal reflection prism 22.The branch on 20 ' periphery of optical filter
The plate glass or single support rod that support member 28 may be, for example, light transmission are without limiting, while supporting element 28 can be with optical filter 20 '
Be at least partly one of the forming (ONE PIECE FORMED).
In an embodiment, filter coating 20 (or optical filter 20 ') is in the length on vertical optical axis direction, before being less than optical path
The clear aperature of the optical element (such as total internal reflection prism 22) of the optical element (such as lens 16) or optical path rear of side
(clear aperture), or it is less than the clear aperature of its forward and backward optical element simultaneously.Refer in this " clear aperature " term
Lens or prism surface are formed with the diameter of the partial region of the raw optical property of midwifery.For example, lens or prism are in periphery
Region is formed with flange (flange) or other structures with for purposes such as positioning assemblings, and the positioning package assembly is to be located at thoroughly
Outside the optics effective diameter of mirror or prism.In addition, the light output surface of filter coating 20 and optical filter 20 ' can be set to optical element 16 or
The optical path upstream of optical element 22, or, set on light enter each optical element 16,22 before position.
Furthermore the coloured light type and filtered region that filter coating 20 (or optical filter 20 ') to be filtered out do not limit completely, this field
Technical staff can configure filter coating 20 (or optical filter 20 ') selected location in optical path and be applied to institute according to actual demand
The environment needed reduces specific coloured light to reach the uniform effect of color of image.For example, as shown in figure 5, filter coating 20 (or
Optical filter 20 ') the different optical elements that can be set in optical path simultaneously and different color light can be filtered out respectively, such as projector 5 is complete
The glue-bondable Red lightscreening plate 20 ' of internal reflection prism 22 is in its surface to reduce feux rouges, and the regional area on 16 surface of lens can
Green filter film 20 is coated with to reduce green light.
Fig. 6 A and Fig. 6 B show use or the colors that unused feux rouges filter (dichroic mirror-RED) filters respectively
Luminous intensity regional distribution chart, wherein abscissa is the different measurement position points by picture centre (0) to outer most edge (18), abscissa
Numerical value 10 to 18 is the measuring point of image outermost, and ordinate is the normalizing of feux rouges (R), green light (G), blue light (B), white light (W)
Change intensity percent.It is that maximum value is 100% and is normalized that the numerical value of Fig. 6 A and Fig. 6 B, which take the brightness of image center,.By
Fig. 6 A can be seen that the feux rouges of the corner regions of image is weaker, therefore the intensity of opposite green/blue generates biggish drop, through filtering
Afterwards because the maximum value of the feux rouges of image middle section is reduced, so that the intensity distribution of three coloured light (RGB) is as shown in Figure 6B on image
It is more consistent, reach the uniform effect of color of image.
By the design of above-mentioned each embodiment, by being arranged on optical element surface or between different optical elements
The filtering structure that can filter out or weaken the relatively stronger coloured light of specific region intensity, can improve the colour brightness of image section region
It is excessively high, and the problem of intensity distribution unevenness is compared with other coloured light, meet the requirement of the equal specification of color.Furthermore it is thrown when using more
Shadow machine is spliced into a TV when spelling wall image, because each projected image has good color uniformity, therefore spliced entirety
Color of image variation is more smooth and has preferable visual effect.
When using, various details can freely change the present invention.A scale is utilized for example, referring in an example above-mentioned
Lesser optical filter, come filter illuminating ray middle section red light, with reach homogeneous image center, edge color it is strong
The purpose of degree.But other than Red lightscreening plate, it can also change and be reached with filtering the optical filter of other color lights or filter coating
Opposite effect.In addition, optical filter or filter coating are not also limited with the center for being set to optical surface, it, can be on-demand when needing
Adjust the position of its setting.
The above is only the preferred embodiment of the present invention, is not intended to limit the present invention in any form, though
So the present invention is disclosed above with preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the method and technique content using the disclosure above make it is a little more
Equivalent embodiment that is dynamic or being modified to equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the present invention
Technical spirit any simple modification, equivalent change and modification to the above embodiments, still fall within technical solution of the present invention
In the range of.
Claims (10)
1. a kind of projector characterized by comprising
Light source, exportable illuminating bundle；
Equal optical element, in the transmission path of the illuminating bundle；
Light valve, in the transmission path of the illuminating bundle；And
The optical element of light-permeable is set between the light valve and the equal optical element, and is located at the transmission path of illuminating bundle
On, the surface of the optical element is equipped with filter coating, and effective filter range of the filter coating the illuminating bundle in
In the illumination zone of the position of optical element, and effective filter range of the optical element is less than the illumination model
It encloses.
2. projector according to claim 1, which is characterized in that the optical element of the light-permeable is total internal reflection rib
Mirror, and the filter coating is arranged at the incidence surface of the total internal reflection prism.
3. projector according to claim 2, which is characterized in that the optical element of the light-permeable is a lens, and institute
State the surface that filter coating is arranged at the lens.
4. a kind of projector characterized by comprising
Light source, exportable illuminating bundle；
Integrator, in the transmission path of the illuminating bundle；
Light valve, in the transmission path of the illuminating bundle；
The optical element of light-permeable is set between the light valve and the integrator, and is located at the transmission road of the illuminating bundle
On diameter；And
Optical filter is set between the light valve and the integrator, and is located in the transmission path of the illuminating bundle, the filter
Effective filter range of mating plate, less than the illuminating bundle range in the optical filter position.
5. projector according to claim 4, which is characterized in that the optical filter is glued on the optical element.
6. projector according to claim 1 or 4, which is characterized in that the light output surface of the optical filter is set to the light
Learn the optical path upstream of element.
7. projector according to claim 1 or 4, which is characterized in that the optical element is prism.
8. projector according to claim 1 or 4, which is characterized in that between the light valve and the light source and be located at institute
The transmission path for stating illuminating bundle is equipped with multiple lens, and the optical element is in the multiple lens near the light
The lens of valve.
9. projector according to claim 4, which is characterized in that the optical filter is Red lightscreening plate, may filter that feux rouges.
10. projector according to claim 4, which is characterized in that along the transmission path of the illuminating bundle, sequentially include
The light source, the integrator, the optical filter, the optical element and the light valve, the integrator are integration rod；Institute
Stating optical filter is feux rouges optical filter, may filter that feux rouges, the optical element are total-reflection prism group, including two prisms；The light
Valve is digital micromirror elements.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106142800 | 2017-12-06 | ||
| TW106142800A TWI670558B (en) | 2017-12-06 | 2017-12-06 | Projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109884843A true CN109884843A (en) | 2019-06-14 |
| CN109884843B CN109884843B (en) | 2021-12-24 |
Family
ID=66924790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810148522.4A Active CN109884843B (en) | 2017-12-06 | 2018-02-13 | Projector with a light source |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109884843B (en) |
| TW (1) | TWI670558B (en) |
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| CN1229180A (en) * | 1998-03-12 | 1999-09-22 | 松下电器产业株式会社 | Lens element and illumination optical apparatus and projection display apparatus |
| CN1099048C (en) * | 1996-10-31 | 2003-01-15 | 索尼公司 | Image projecting apparatus |
| US20090168041A1 (en) * | 2007-12-27 | 2009-07-02 | Konica Minolta Opto, Inc. | Projection apparatus |
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| CN102445764A (en) * | 2010-10-12 | 2012-05-09 | 亚洲光学股份有限公司 | Three-color light synthesis device |
| CN102654721A (en) * | 2011-03-01 | 2012-09-05 | 三菱电机株式会社 | Projection display device |
| CN103065551A (en) * | 2013-01-16 | 2013-04-24 | 深圳市华星光电技术有限公司 | Spliced display screen |
| CN103809361A (en) * | 2013-08-02 | 2014-05-21 | 吴震 | Projection display system |
| CN203786454U (en) * | 2014-01-08 | 2014-08-20 | 扬明光学股份有限公司 | Illumination system and projection device |
| CN104102079A (en) * | 2013-04-02 | 2014-10-15 | 扬明光学股份有限公司 | Light source module and projector |
| CN104516181A (en) * | 2014-12-17 | 2015-04-15 | 广东威创视讯科技股份有限公司 | Lighting system, projector and back projection system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI456333B (en) * | 2013-03-28 | 2014-10-11 | Delta Electronics Inc | Lighting system for using in digital cinema projection apparatus |
-
2017
- 2017-12-06 TW TW106142800A patent/TWI670558B/en active
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- 2018-02-13 CN CN201810148522.4A patent/CN109884843B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1099048C (en) * | 1996-10-31 | 2003-01-15 | 索尼公司 | Image projecting apparatus |
| CN1229180A (en) * | 1998-03-12 | 1999-09-22 | 松下电器产业株式会社 | Lens element and illumination optical apparatus and projection display apparatus |
| US20090168041A1 (en) * | 2007-12-27 | 2009-07-02 | Konica Minolta Opto, Inc. | Projection apparatus |
| CN201796193U (en) * | 2010-07-07 | 2011-04-13 | 北京中视中科光电技术有限公司 | Device for weakening laser speckle |
| CN102445764A (en) * | 2010-10-12 | 2012-05-09 | 亚洲光学股份有限公司 | Three-color light synthesis device |
| CN102654721A (en) * | 2011-03-01 | 2012-09-05 | 三菱电机株式会社 | Projection display device |
| CN103065551A (en) * | 2013-01-16 | 2013-04-24 | 深圳市华星光电技术有限公司 | Spliced display screen |
| CN104102079A (en) * | 2013-04-02 | 2014-10-15 | 扬明光学股份有限公司 | Light source module and projector |
| CN103809361A (en) * | 2013-08-02 | 2014-05-21 | 吴震 | Projection display system |
| CN203786454U (en) * | 2014-01-08 | 2014-08-20 | 扬明光学股份有限公司 | Illumination system and projection device |
| CN104516181A (en) * | 2014-12-17 | 2015-04-15 | 广东威创视讯科技股份有限公司 | Lighting system, projector and back projection system |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI670558B (en) | 2019-09-01 |
| TW201925899A (en) | 2019-07-01 |
| CN109884843B (en) | 2021-12-24 |
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