CN104238250A - Mini-type LCOS projection optical engine - Google Patents
Mini-type LCOS projection optical engine Download PDFInfo
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- CN104238250A CN104238250A CN201410487487.0A CN201410487487A CN104238250A CN 104238250 A CN104238250 A CN 104238250A CN 201410487487 A CN201410487487 A CN 201410487487A CN 104238250 A CN104238250 A CN 104238250A
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Abstract
The invention provides a mini-type LCOS projection optical engine. The mini-type LCOS projection optical engine comprises a light emission unit, an imaging unit and a projection unit, and the imaging unit and the projection unit are arranged in the spreading direction of light rays. According to the mini-type LCOS projection optical engine, as the light emission unit comprises a light source used for emitting light rays and a light guide board used for converting a point light source emitted by the light source into an area light source, the light source is formed by arranging a plurality of low-power white light LEDs in a lattice array mode, the light guide board comprises a light guide face, a reflection face and a light outlet face with a 3D texture structure, and light rays can be emitted out evenly only through one light guide board, the mini-type LCOS projection optical engine is simple in structure, small in size and high in light energy utilization rate, and the cost is accordingly lowered.
Description
Technical field
The invention belongs to optical imaging field, be specifically related to a kind of miniature LCOS projecting optical engine.
Background technology
Projection display technique refers to and utilizes optical system and projector space Nonlinear magnify and display method on the projection screen.Popular along with smart mobile phone and wearable device, proposes more requirements to the display under different scene.Wherein microminiaturized projector, owing to having small in volume and can meet the basic function of projection, is highly suitable on this kind equipment integrated, has expanded the usable range of projector, had wide market outlook.
LCOS light engine, as one of basic micro projection technology, comparatively has cheap in other technology, and the feature of projection excellent performance is most possible business-like micro projection technology.LCOS optical engine system generally comprises light source, display chip and imaging system, traditional LCOS optical engine system adopt compound eye array complete light on illuminatian plate by uneven distribution to equally distributed space transforming, but when compound eye array realizes Uniform Illumination, need the compound eye array that two row optical axises are parallel to each other, placement condenser is also needed after secondary series compound eye array, its structure is more complicated, volume is comparatively large, causes the cost of LCOS light engine higher.
Summary of the invention
The present invention is for solving the problem and carrying out, object is by providing a kind of light guide plate that adopts to complete light on illuminatian plate by the miniature LCOS projecting optical engine of uneven distribution to equally distributed space transforming, the structure of the existing miniature LCOS projecting optical engine of further simplification, reduces volume simultaneously.
Present invention employs following technical scheme:
Miniature LCOS projecting optical engine provided by the invention, has such feature, comprising: Optical Transmit Unit, for emission of light, comprise light source and be arranged at the light guide plate on light transmition direction, light source is used for emitting beam, and the line source that light guide plate is used for light source to send changes area source into; Image-generating unit, is connected with Optical Transmit Unit, for the imaging of light emitting units emitting light; And projecting cell, be connected with image-generating unit, for image projection that image-generating unit is formed at screen.
Wherein, light guide plate comprises light guiding surface, reflecting surface and exiting surface, light guiding surface is relative with Optical Transmit Unit outlet, for importing the light that light source sends, reflecting surface is for the light reflection that imported by light guiding surface to exiting surface, and exiting surface and image-generating unit are oppositely arranged, for by the outgoing from light guide plate of uniform light ground, exiting surface is with 3D texture structure, and 3D texture structure is used for carrying out scattering, with making uniform light from exiting surface outgoing to the light that reflective surface goes out.
Miniature LCOS projecting optical engine provided by the invention, such feature can also be had: image-generating unit comprises the PBS prism and LCOS chip that are linked in sequence, PBS prism is used for the nonpolarized light of Optical Transmit Unit incidence to be divided into the mutually perpendicular P linearly polarized light of two bundles and S linearly polarized light, LCOS chip be used for by PBS prism through light, be converted to coloured image.
Miniature LCOS projecting optical engine provided by the invention, can also have such feature: Optical Transmit Unit also comprises uv absorption assembly, for absorb Optical Transmit Unit emit beam in ultraviolet.
Miniature LCOS projecting optical engine provided by the invention, can also have such feature: light source is made up of at least one white light LEDs and reflective surface, white light LEDs is used for emitting beam, and light for collecting light, and is injected light guide plate by reflective surface.
Miniature LCOS projecting optical engine provided by the invention, can also have such feature: image-generating unit also comprises polarization components, described polarization components between described PBS prism and described LCOS chip, for the veiling glare in coloured image described in filtering.
Miniature LCOS projecting optical engine provided by the invention, can also have such feature: LCOS chip is colorized optical filtering type.
Miniature LCOS projecting optical engine provided by the invention, such feature can also be had: there is in LCOS chip signal and control light valve assembly, signal control light valve assembly be used for by PBS prism through white light conversion be coloured image, coloured image is converted to P linearly polarized light simultaneously.
Invention effect and effect
The invention provides a kind of miniature LCOS projecting optical engine, the image-generating unit comprising Optical Transmit Unit and be arranged on light transmition direction and projecting cell, according to LCOS projecting optical engine provided by the invention, because Optical Transmit Unit comprises the optical plate that the light source for emitting beam and the pointolite for being sent by light source are converted to area source, light source adopts multiple miniwatt white light LEDs to arrange with lattice array, light guide plate comprises light guiding surface, reflecting surface and the exiting surface with 3D texture structure, only need one piece of light guide plate can realize the uniform of light, make miniature LCOS projecting optical engine structure provided by the invention simple, volume is little, the efficiency of light energy utilization is high, and then cost is minimized.
Accompanying drawing explanation
Fig. 1 is the structural representation of miniature LCOS projecting optical engine of the present invention;
Fig. 2 is the structural representation of light source of the present invention;
Fig. 3 is the structural representation of light guide plate of the present invention;
Fig. 4 be in the present invention above structural representation.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.
The present embodiment carries out system explanation with white light LEDs, Wedge shape light conduction board, PBS prism, colorized optical filtering type LCOS chip to miniature LCOS projecting optical engine of the present invention, but the scope of the present embodiment not delimit the scope of the invention.
Fig. 1 is the structural representation of the miniature LCOS projecting optical engine of the present embodiment.
As shown in Figure 1, miniature LCOS projecting optical engine 100 comprises Optical Transmit Unit 1, image-generating unit 2, projecting cell 3 and screen 4, Optical Transmit Unit 1 comprises light source 11, light guide plate 12 and uv absorption assembly 13, image-generating unit 2 comprises in PBS prism 21, LCOS chip 22 and the polaroid between PBS prism 21 and LCOS chip 22 23, LCOS chip 22 and also controls light valve assembly 221 with signal.
Light source 11 is for emission of light, and light guide plate 12 changes area source into for the line source sent by light source, and uv absorption assembly 13, for absorbing the ultraviolet in light guide plate injection light, avoids ultraviolet to the infringement of LCOS chip 22; In image-generating unit 2, PBS prism 21 is for being divided into the mutually perpendicular P linearly polarized light of two bundles and S linearly polarized light by the nonpolarized light of Optical Transmit Unit 1 incidence, LCOS chip 22 for by PBS prism through light, be converted to coloured image, polaroid 23 is for the veiling glare in filtering coloured image.
Fig. 2 is the structural representation of the light source in the present embodiment.
As shown in Figure 2, light source 11 comprises multiple white light LED array 112 that cross section is parabolical parabolic reflector 111 and is placed in bottom reflecting surface, and parabolic reflector 111 inside is coated with cold reflective membrane, and multiple white light LED array 112 mode with lattice arrangement arranges.
Fig. 3 is the structural representation of the light guide plate in the present embodiment.
Fig. 4 be in the present embodiment above structural representation.
As shown in Figure 3 and Figure 4, light guide plate 12 comprises: side 121, bottom surface 122, inclined-plane 123 and above 124, above 124 comprise with 3D texture structure 3D texture face 1241 and do not occupied by 3D texture structure, be positioned at face, upper left 1242 above on the left of 124, bottom surface 122 and face, upper left 1242 opposite face each other, 3D texture face 1241 and inclined-plane 123 opposite face each other.
Side 121 is light guiding surface, just export light source 11, for importing the light of light source 11 outgoing, bottom surface 122, inclined-plane 123 and face, upper left 1242 are all coated with reflectance coating, for reflecting surface, for light reflection that light source 11 is sent to the 3D texture face 1241 as exiting surface.
After the light of light source 11 outgoing is imported by side 121, light reflexes to 3D texture face 1241 by the reflective membrane on bottom surface 122, inclined-plane 123 or face, upper left 1242, after the scattering of 3D texture structure, uniformly from light guide plate 12 outgoing; Because light entry position is different, some light through primary event both can arrive 3D texture face 1241 (as light in Fig. 3 a), some light then needs the multiple reflections through multiple just can be reflected onto (the light b as in Fig. 3) in 3D texture face 1241.
As shown in Figures 1 to 4, in miniature LCOS projecting optical engine 100, parabolic reflector 111 in light source 11 is laterally placed, outlet is just to the side 121 of light guide plate 12, as the 3D texture face 1241 of exiting surface just to PBS prism 21, ultraviolet is inhaled assembly 13 and is placed between 3D texture face 1241 and PBS prism 21, and polaroid 23 is placed between LCOS chip 22 and PBS prism 21.
The implementation procedure of miniature LCOS projecting optical engine 100 is: white light LEDs 112 emits beam, collected by parabolic reflective surface 111, and be injected in the side 121 in light guide plate 12 by the cold reflective membrane reflection in it, light in light guide plate 12 after the scattering in multiple reflections and 3D texture face 1241, uniform from light guide plate 12 outgoing, carry out double absorption, filtration by the ultraviolet in uv absorption assembly 13 pairs of light, then enter PBS prism 21, the nonpolarized light of Optical Transmit Unit 1 outgoing is divided into the mutually perpendicular P linearly polarized light of two bundles and S linearly polarized light by PBS prism 21, S linearly polarized light is through PBS prism 21, P linearly polarized light is then reflected, through S linearly polarized light enter LCOS chip 22, signal in LCOS chip 22 controls light valve assembly 221, white light is formed the coloured image of RGB combination, and convert the S linearly polarized light presented with coloured image to P linearly polarized light in inside, after polaroid 23 filtering veiling glare, reflected by PBS prism 21, reflection ray is through projecting cell 3, projection on the screen 4, obtain desirable novel, image clearly.
In the present embodiment, 3D texture structure is made up of multiple little bulge-structure, and the shape of small embossment is circular or polygon.
Embodiment effect and effect
Present embodiments provide a kind of miniature LCOS projecting optical engine, the image-generating unit comprising Optical Transmit Unit and be arranged on light transmition direction and projecting cell, according to LCOS projecting optical engine provided by the invention, because Optical Transmit Unit comprises the light guide plate that the light source for emitting beam and the pointolite for being sent by light source are converted to area source, light source adopts multiple miniwatt white light LEDs to arrange with lattice array, light guide plate comprises light guiding surface, reflecting surface and the exiting surface with 3D texture structure, only need one piece of light guide plate can realize the uniform of light, make miniature LCOS projecting optical engine structure provided by the invention simple, volume is little, the luminescence efficiency of LED improves, and then cost is minimized.
Claims (7)
1. a miniature LCOS projecting optical engine, is characterized in that, comprising:
Optical Transmit Unit, for emission of light, comprise light source and be arranged at the light guide plate on light transmition direction, described light source is used for emitting beam, and described light guide plate is used for changing the line source that described light source sends into area source;
Image-generating unit, is connected with described Optical Transmit Unit, for the imaging of described light emitting units emitting light; And
Projecting cell, is connected with described image-generating unit, for image projection that described image-generating unit is formed at screen,
Wherein, described light guide plate comprises light guiding surface, reflecting surface and exiting surface, described light guiding surface is relative with described Optical Transmit Unit outlet, for importing the light that described light source sends, the described light reflection extremely described exiting surface of described reflecting surface for described light guiding surface is imported, described exiting surface and described image-generating unit are oppositely arranged, for by the outgoing from described light guide plate of described uniform light ground
Described exiting surface is with 3D texture structure, and described 3D texture structure is used for carrying out scattering to the light that described reflective surface goes out, with making uniform light from described exiting surface outgoing.
2. miniature LCOS projecting optical engine according to claim 1, is characterized in that:
Wherein, described image-generating unit comprises the PBS prism and LCOS chip that are linked in sequence, described PBS prism is used for the nonpolarized light of described Optical Transmit Unit incidence to be divided into the mutually perpendicular P linearly polarized light of two bundles and S linearly polarized light, described LCOS chip be used for by described PBS prism through light, be converted to coloured image.
3. miniature LCOS projecting optical engine according to claim 1, is characterized in that:
Wherein, described Optical Transmit Unit also comprises uv absorption assembly, for absorb described Optical Transmit Unit emit beam in ultraviolet.
4. miniature LCOS projecting optical engine according to claim 1, is characterized in that:
Wherein, described light source is made up of at least one white light LEDs and reflective surface, and described white light LEDs is used for emitting beam, and described light for collecting described light, and is injected described light guide plate by described reflective surface.
5. miniature LCOS projecting optical engine according to claim 2, is characterized in that:
Wherein, described image-generating unit also comprises polarization components, described polarization components between described PBS prism and described LCOS chip, for the veiling glare in coloured image described in filtering.
6. miniature LCOS projecting optical engine according to claim 2, is characterized in that:
Wherein, described LCOS chip is colorized optical filtering type.
7. miniature LCOS projecting optical engine according to claim 7, is characterized in that:
Wherein, there is in described LCOS chip signal and control light valve assembly, described signal control light valve assembly be used for by described PBS prism through white light conversion be coloured image, described coloured image is converted to P linearly polarized light simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410487487.0A CN104238250A (en) | 2014-09-23 | 2014-09-23 | Mini-type LCOS projection optical engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410487487.0A CN104238250A (en) | 2014-09-23 | 2014-09-23 | Mini-type LCOS projection optical engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108761899A (en) * | 2018-04-19 | 2018-11-06 | 北京灵犀微光科技有限公司 | Light source for liquid crystal on silicon lighting device |
| CN110146990A (en) * | 2019-06-17 | 2019-08-20 | 成都晶华光电科技股份有限公司 | Light engine and intelligent glasses |
| US11899235B2 (en) | 2018-12-05 | 2024-02-13 | Elbit Systems Ltd. | Display illumination optics |
| JP7537461B2 (en) | 2022-03-30 | 2024-08-21 | セイコーエプソン株式会社 | Light source device and projector |
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| CN102243376A (en) * | 2011-06-16 | 2011-11-16 | 中国科学院福建物质结构研究所 | High-light-efficiency and high-brightness miniature projection liquid crystal on silicon (LCOS) optical engine |
| CN102298253A (en) * | 2010-06-25 | 2011-12-28 | 鸿富锦精密工业（深圳）有限公司 | Miniature silicon crystal projector |
| CN102411206A (en) * | 2010-09-23 | 2012-04-11 | 鸿富锦精密工业（深圳）有限公司 | Projection system |
| JP2014119472A (en) * | 2012-12-13 | 2014-06-30 | Seiko Epson Corp | Image display system |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030086066A1 (en) * | 2001-11-02 | 2003-05-08 | Nec Viewtechnology, Ltd. | Polarizing unit, polarizing illumination device using same polarizing unit and projection display device using same polarizing illumination device |
| CN101231452A (en) * | 2008-01-31 | 2008-07-30 | 浙江金成科技发展有限公司 | Reflexion type light-valve minisize projection apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761899A (en) * | 2018-04-19 | 2018-11-06 | 北京灵犀微光科技有限公司 | Light source for liquid crystal on silicon lighting device |
| US11899235B2 (en) | 2018-12-05 | 2024-02-13 | Elbit Systems Ltd. | Display illumination optics |
| CN110146990A (en) * | 2019-06-17 | 2019-08-20 | 成都晶华光电科技股份有限公司 | Light engine and intelligent glasses |
| JP7537461B2 (en) | 2022-03-30 | 2024-08-21 | セイコーエプソン株式会社 | Light source device and projector |
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Application publication date: 20141224 |