CN110174813A - Light engine and projector - Google Patents
Light engine and projector Download PDFInfo
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- CN110174813A CN110174813A CN201910522582.2A CN201910522582A CN110174813A CN 110174813 A CN110174813 A CN 110174813A CN 201910522582 A CN201910522582 A CN 201910522582A CN 110174813 A CN110174813 A CN 110174813A
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- 230000010287 polarization Effects 0.000 claims abstract description 103
- 230000003287 optical effect Effects 0.000 claims abstract description 89
- 238000003384 imaging method Methods 0.000 claims abstract description 55
- 239000003518 caustics Substances 0.000 claims abstract description 26
- 230000011514 reflex Effects 0.000 claims abstract description 5
- 238000002834 transmittance Methods 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000001902 propagating effect Effects 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000005570 vertical transmission Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 230000009466 transformation 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
- G03B21/14—Details
- G03B21/20—Lamp housings
-
- 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
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2066—Reflectors in illumination beam
-
- 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
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The present invention discloses a kind of light engine and projector, wherein the light engine includes: lighting unit；Imaging unit is installed on the light emission side of lighting unit；Lens unit, it is installed between lighting unit and imaging unit, lens unit has caustic surface, the optical surface in face of imaging unit and the reflecting surface positioned at caustic surface and optical surface the same side in face of lighting unit, and the light that optical surface and lighting unit issue is arranged in angle；Polarization unit is installed between lens unit and imaging unit, and polarization unit has the plane of polarization in face of imaging unit, and plane of polarization and optical surface are in that the angle greater than 0 ° is arranged；And LCOS chip, it is installed between polarization unit and imaging unit, the light of LCOS chip reflectance-transmittance plane of polarization is to plane of polarization, so that the light of LCOS chip reflection reflexes to imaging unit by plane of polarization.So set, reducing the structure size of light engine, and then be conducive to the volume of reduced projection instrument.
Description
Technical field
The present invention relates to projection device technical field, in particular to a kind of light engine and projector.
Background technique
Existing projector generally includes shell and is installed on the intracorporal light engine of shell, light engine include light source,
Collector lens, reflecting mirror, even mating plate, image formation prism, LCOS chip (Liquid Crystal on Silicon, the attached silicon of liquid crystal)
And camera lens, wherein collector lens is installed on the light emission side of the light source, and even mating plate is installed on the light emission side of collector lens, polarization
Piece is installed on the light emission side of even mating plate, and the plane of polarization and light of the polarizing film are arranged in 45 degree of angles, and LCOS chip is installed on partially
The side of vibration piece and the light reflected for receiving polarizing film, while the LCOS chip turn partially, so that by LCOS to light
The light of chip reflection can enter camera lens through polarizing film.Camera lens is installed on the opposite of LCOS chip, the figure that LCOS chip is formed
As being transmitted through camera lens by polarizing film.
However, each optical element of the light engine in existing projector is L-shaped arrangement, this allows for projecting
The light engine of instrument needs biggish installation space, and then causes the volume of projector entirety bigger.
Summary of the invention
The main object of the present invention is to provide a kind of light engine, it is intended to the volume of reduced projection instrument.
To achieve the above object, a kind of light engine proposed by the present invention is applied to projector, the light engine packet
It includes:
Lighting unit；
Imaging unit is installed on the light emission side of the lighting unit；
Lens unit is installed between the lighting unit and the imaging unit, and the lens unit, which has, faces institute
State lighting unit caustic surface, in face of the imaging unit optical surface and be located at the caustic surface and the optical surface it is same
The light that the reflecting surface of side, the optical surface and the lighting unit issue is arranged in angle, is reflected through the caustic surface
Light light through the reflective surface to the reflecting surface and transmission；
Polarization unit is installed between the lens unit and the imaging unit, and the polarization unit, which has, faces institute
The plane of polarization of imaging unit is stated, the plane of polarization and the optical surface are in that the angle greater than 0 ° is arranged, and can reflect or transmit
Light；And
LCOS chip is installed between the polarization unit and the imaging unit, the LCOS chip reflectance-transmittance institute
The light of plane of polarization is stated to the plane of polarization, so that the light of LCOS chip reflection reflexes to the imaging by the plane of polarization
Unit.
Optionally, the light that the plane of polarization and the lighting unit issue is arranged in 45 ° of angles, the plane of polarization also with institute
LCOS chip is stated in 45 ° of angle settings.
Optionally, the polarization unit also have in face of the optical surface and with plane of polarization light transmission disposed in parallel
Face, the spacing between the transparent surface and the optical surface from a side of the transparent surface to the other side of the transparent surface gradually
Increase setting.
Optionally, the polarization unit list has in face of the optical surface and sets with the plane of polarization in the angle greater than 0 °
The transparent surface set, spacing between the transparent surface and the optical surface is from a side of the transparent surface to the another of the transparent surface
Side is gradually increased setting.
Optionally, the caustic surface is arranged in convexity arc surface, with scheduled curvature, so that passing through the caustic surface
Light all converge at the optical surface.
Optionally, the reflecting surface is coated with reflecting material.
Optionally, the reflecting surface and the optical surface are arranged in angle, so that the light through the reflective surface is complete
Portion is arranged through the optical surface.
The present invention also proposes a kind of projector comprising shell and is installed on the intracorporal light engine of shell, the optics
Engine includes:
Lighting unit；
Imaging unit is installed on the light emission side of the lighting unit；
Lens unit is installed between the lighting unit and the imaging unit, and the lens unit, which has, faces institute
State lighting unit caustic surface, in face of the imaging unit optical surface and be located at the caustic surface and the optical surface it is same
The light that the reflecting surface of side, the optical surface and the lighting unit issue is arranged in angle, is reflected through the caustic surface
Light light through the reflective surface to the reflecting surface and transmission；
Polarization unit is installed between the lens unit and the imaging unit, and the polarization unit, which has, faces institute
The plane of polarization of imaging unit is stated, the plane of polarization and the optical surface are in that the angle greater than 0 ° is arranged, and can reflect or transmit
Light；And
LCOS chip is installed between the polarization unit and the imaging unit, the LCOS chip reflectance-transmittance institute
The light of plane of polarization is stated to the plane of polarization, so that the light of LCOS chip reflection reflexes to the imaging by the plane of polarization
Unit.
Light engine of the invention is by using lens unit and LCOS chip, so that the illumination list in the light engine
Member, lens unit, polarization unit, LCOS chip and imaging unit are in row's setting, compared to using in existing light engine
LCOS chip and make in existing light engine for each L-shaped row of optical element, the present invention in light engine needed for
The installation space wanted is smaller, this is allowed for using to have the volume of the projector of the light engine that can do smaller, so that
It can be adapted for various electronic (such as intelligent glasses, mobile phone) using the projector for having the light engine.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of light engine of the invention；
Fig. 2 is the structural schematic diagram of another embodiment of light engine of the invention.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 100 | Light engine | 31 | Caustic surface |
| 10 | Lighting unit | 32 | Optical surface |
| 20 | Imaging unit | 33 | Reflecting surface |
| 30 | Lens unit | 41 | Plane of polarization |
| 40 | Polarization unit | 42 | Transparent surface |
| 50 | LCOS chip |
The realization, the function and the advantages of the object of the present invention will be described further refering to attached drawing in conjunction with the embodiments.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that the description for being related to " first ", " second " etc. in the present invention is used for description purposes only, and cannot understand
For its relative importance of indication or suggestion or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ",
The feature of " second " can explicitly or implicitly include at least one of the features.In addition, the "and/or" occurred in full text contains
Justice are as follows: including three schemes arranged side by side, by taking " A/B " as an example, including the scheme that A scheme or B scheme or A and B meet simultaneously, separately
Outside, the technical solution between each embodiment can be combined with each other, can be real with those of ordinary skill in the art but must be
Based on existing, the combination of this technical solution will be understood that not when conflicting or cannot achieve when occurs in the combination of technical solution
In the presence of, also not the present invention claims protection scope within.
The present invention proposes a kind of light engine, to change the arrangement mode of each optical element in existing light engine, thus
The volume for reducing light engine, please refers to Fig. 1 or Fig. 2, Fig. 1 shows the structural representation of one embodiment of light engine of the invention
Figure, Fig. 2 shows the structural schematic diagrams of another embodiment of light engine of the invention.The light engine 100 includes lighting unit
10, imaging unit 20, lens unit 30, polarization unit 40 and LCOS chip 50；Wherein, which is installed on the photograph
The light emission side of bright unit 10；The lens unit 30 is installed between lighting unit 10 and imaging unit 20, the lens unit 30 tool
There are the caustic surface 31 in face of lighting unit 10, the optical surface 32 in face of imaging unit 20 and is located at caustic surface 31 and optical surface 32
The reflecting surface 33 of the same side；The polarization unit 40 is installed between lens unit 30 and imaging unit 20, the polarization unit 40 tool
There is the plane of polarization 41 in face of imaging unit 20, the plane of polarization 41 and optical surface 32 are in that the angle greater than 0 ° is arranged；The LCOS chip
50 are installed between polarization unit 40 and imaging unit 20.
First lighting unit 10 can be formed only by the lamp that can be shone, which can also be by can
Luminous lamp and other optical elements composition, such as first lighting unit 10 can be made of white led lamps；For another example this
One lighting unit 10 is by red LED lamp, blue LED lamp, green LED lamp and two filter sets at the green LED lamp direction
Reflector element 30 is arranged, and two optical filters are installed between green LED lamp and reflector element 30, and two optical filters are and green LED lamp
The light of sending is arranged in angle, and blue LED lamp and red LED lamp are mounted on side of two optical filters far from imaging unit 20,
The optical filter of neighbouring green LED lamp is arranged in two optical filter of blue LED lamp face, neighbouring in two optical filter of red LED lamp face
The optical filter of reflector element 30 is arranged, the optical filter of neighbouring green LED lamp can green reflection blue light thoroughly, near reflection unit 30
Optical filter reveal the green and light and blue light while reflecting feux rouges, the light for allowing for three-color LED light sending in this way can converge to be formed it is highlighted
The light of degree.
The imaging unit 20 can be formed only by imaging lens, which can also be by imaging lens and lens
Composition, such as the imaging unit 20 are only formed by camera lens, are received the light that polarization unit 40 reflects and are formed image；For another example this at
As unit 20 is made of imaging lens and lens, which can be convex lens or dioptric lens, be installed on polarization unit
Between 40 and imaging lens, if the lens are convex lens, it is used to converge the light that the polarization unit 40 is reflected, so that this is partially
The light that vibration unit 40 reflects all propagates to imaging lens, if if the lens are dioptric lens, for changing polarization unit
40 light reflected can thus change the position of imaging lens by the dioptric lens.
There are many kinds of the shapes of the lens unit 30, can be triangular prism shaped, prism class shape, more prismatics and other
Shape setting, does not do specific restriction herein, preferably, the lens unit 30 is arranged in triangular prism or prism class, this is thoroughly
Mirror unit 30 forms caustic surface 31 in face of the side surface of lighting unit 10, which forms light to the side surface of imaging unit 20
Face 32, which connects caustic surface 31 and the side surface of optical surface 32 forms reflecting surface 33, which is used for
The light that lighting unit 10 issues is converged, the reflecting surface 33 is for reflecting the light reflected through optical surface 32, and the optical surface 32 is for anti-
The light by caustic surface 31 is penetrated to reflecting surface 33, which is also used to transmit the light reflected through reflecting surface 33.
It should be noted that make to be totally reflected by the light of caustic surface 31 in optical surface 32, then need to meet Si Nie
Ear law, n1sinθ1=n2sinθ2, wherein n1And n2It is the refractive index of two media, θ respectively1And θ2Respectively incident light or folding
The angle for penetrating light and interface discovery, is called incidence angle and refraction angle.Principle is as follows: if incidence angle θ1Equal to some angle θcWhen,
Refracted light is carried out along the tangent line of refracting interface, i.e., refraction angle is 90 °, at this time sin θ2=1, then it can push away to obtain sin θc=sin θ1
=n2/n1.But if incidence angle θ1Greater than this value θcWhen, the sinusoidal sin θ of incidence angle1> n2/n1, sin θ can be pushed away to obtain2> 1, this
A is mathematically nonsensical, so only existing reflected light there is no refraction light at this time, is then just totally reflected.It should
What the angle of optical surface 32 and the light by transparent surface 42 was arranged according to snell law, i.e., by the refractive index n of lens unit 301
With the refractive index n of air2To determine optical surface 32 and by the corner dimension between transparent surface 42.
In addition, it should also be noted that the plane of polarization 41 and the optical surface 32 are in the angle setting greater than 0 °, that is to say, that
The plane of polarization 41 is not arranged in parallel with the optical surface 32, occurs on plane of polarization 41 instead to avoid the light through optical surface 32
It penetrates, so that the problem of light quantity through plane of polarization 41 is reduced.
There are many kinds of the shapes of the polarization unit 40, can be tabular (please referring to Fig. 1), wedge-shaped (referring to figure 2.)
Etc., it is just not listed one by one herein；The polarization unit 40 can be made of glass plate and polarizing coating, which is installed on
Between mirror unit 30 and imaging unit 20, which, which applies, is set to the glass-board surface to the surface of imaging unit 20, to be formed partially
Vibration face 41；The polarization unit 40 can also be made of lens and polarizing coating, which is installed on lens unit 30 and imaging unit
Between 20, which, which applies, is set to lens face to the surface of imaging unit 20, to form plane of polarization 41；The polarization unit 40 may be used also
To be formed by other translucent materials and polarizing coating, be just not listed one by one herein.
LCOS (Liquid Crystal on Silicon) the attached silicon of chip, that is, liquid crystal is a kind of based on reflective-mode
Matrix liquid crystal display device, this allows for the light reflexed on LCOS chip 50 by polarization unit 40 can be by LCOS chip 50
It is reflected back, while the LCOS chip 50 also polarizes light, so that the light of the plane of polarization 41 of light transmission polarization unit 40 can be with
Imaging unit 20 is reflexed to by the plane of polarization 41 of polarization unit 40.
At work, the light that lighting unit 10 issues is converged the light engine 100 by the caustic surface 31 of lens unit 30
In lens unit 30 optical surface 32 and be totally reflected in the optical surface of lens unit 30 32, after light is reflected onto reflecting surface 33
Reflection through reflecting surface 33 propagates to optical surface 32 again, when propagating to optical surface 32 after being reflected due to light by reflecting surface 33, light
Angle between optical surface 32 is changed, this light for allowing for after reflecting surface 33 reflects can set out in optical surface 32
Raw refraction so that light can propagate to the plane of polarization 41 of polarization unit 40 through optical surface 32, the polarization unit 40 it is inclined
Vibration face 41 can be penetrated for the light through optical surface 32, and LCOS chip 50 receives the light through the plane of polarization 41 of polarized lens and will
It is reflexed to again after light polarization on the plane of polarization 41 of polarized lens, since light is polarized by LCOS chip 50, this allows for propagating to
The light of the plane of polarization 41 of polarization unit 40 can not penetrate plane of polarization 41, so that the light reflected through LCOS chip 50 is all inclined
The plane of polarization 41 of vibration lens reflexes to imaging unit 20, forms corresponding image.
Light engine 100 of the invention is by using lens unit 30 and LCOS chip 50, so that the light engine 100
In lighting unit 10, lens unit 30, polarization unit 40, LCOS chip 50 and imaging unit 20 in row setting, compared to
Each L-shaped row of optical element in existing light engine 100 made using LCOS chip in existing light engine 100 and
It says, installation space required for the light engine 100 in the present invention is smaller, this is allowed for using the throwing for having the light engine 100
The volume of shadow instrument can be done smaller, so that can be adapted for a variety of electronics using the projector for having the light engine 100
Equipment (such as intelligent glasses, mobile phone).
Fig. 1 is please referred in one embodiment of this invention to reduce installation space required for the light engine 100
Or Fig. 2, the light that the plane of polarization 41 of the polarization unit 40 and the lighting unit 10 are issued are arranged in 45 ° of angles, the plane of polarization
41 are also arranged with LCOS chip 50 in 45 ° of angles.So set, making lighting unit 10, polarization unit 40 and imaging unit
20 are located along the same line, while the extending direction of the LCOS chip 50 and the lighting unit 10, polarization unit 40 and imaging
Straight line parallel where unit 20, so that each optical element of the light engine 100 is linearly arranged on the whole, in this way
Just further reduce installation space required for the light engine 100.
It is worth noting that, through polarization unit 40 plane of polarization 41 light vertical transmission to LCOS chip 50, to make
Through polarization unit 40 plane of polarization 41 light vertical transmission to LCOS chip 50, then need to adjust light through optical surface 32 with
The angle of plane of polarization 41, there are many kinds of the modes for adjusting the angle of the light and plane of polarization 41 through optical surface 32, of the invention
In one embodiment, please refer to Fig. 1, the polarization unit 40 also have in face of optical surface 32 and with the light transmission disposed in parallel of plane of polarization 41
Face 42, the spacing between the transparent surface 42 and plane of polarization 41 are gradually increased setting from one end of the transparent surface 42 to its other end,
The wedge shaped setting in gap i.e. between the transparent surface 42 and plane of polarization 41.So set, can make through optical surface 32 and
The angle of light and plane of polarization 41 after transparent surface 42 reaches preset requirement, to guarantee that the light through optical surface 32 can be vertical
Propagate to LCOS chip 50.
Obviously, the angle that the light and plane of polarization 41 through optical surface 32 can also be adjusted in other way, at this
In another embodiment of invention, referring to figure 2., which also has in face of optical surface 32 and is in be greater than with plane of polarization 41
The transparent surface 42 of 0 ° of angle setting, the spacing between the transparent surface 42 and plane of polarization 41 are another from one end of the transparent surface 42 to it
One end is gradually increased setting.So set, the light through optical surface 32 is made to go out to occur through face to reflect for the first time, penetrating
Occur to reflect for second when plane of polarization 41, ensures that light can be along the side of vertical LCOS chip 50 after reflecting twice in this way
To propagating to LCOS chip 50.
In order to make wide partially or completely the converging on optical surface 32 of the lighting unit 10 sending, of the invention one
In embodiment, Fig. 1 or Fig. 2 is please referred to, the caustic surface 31 of the lens unit 30 is arranged in convexity arc surface, with scheduled song
Rate, this, which allows for the caustic surface 31, has the function of convex lens, and the light that lighting unit 10 issues can be in the effect of caustic surface 31
Lower whole converges at optical surface 32, and which improves the utilization rates of light, while can also ensure that the imaging of the light engine 100
Effect.
In order to enable reflecting surface 33 that light all to be reflexed to optical surface 32, in one embodiment of this invention, the reflection
Face 33 is convexly equipped with reflecting material (not shown), which can be metallic aluminium, metallic silver or other deielectric-coating.So set
It sets, enables the light for reflexing to reflecting surface 33 through optical surface 32 to be all reflected back toward optical surface 32, avoid part in this way
Light occurs through the problem of reflecting surface 33, improves the utilization rate of light.
It certainly, can also be by adjusting the folder of reflecting surface 33 and optical surface 32 in order to improve the reflecting effect of reflecting surface 33
Angle is realized, so that the light reflected through optical surface 32 can all be reflected back optical surface 32 by reflecting surface 33, that is to say, that make
It is totally reflected at reflecting surface 33 by the light that optical surface 32 reflects, so that the light for propagating to reflecting surface 33 can be whole
It is reflected back toward optical surface 32.
It is worth noting that, the size of the angle between the reflecting surface 33 and optical surface 32 is also with the reflecting surface 33 and through being somebody's turn to do
Corner dimension between the light of optical reflection is related, and the light for reflexing to reflecting surface 33 through optical surface 32 will reflect total reflection, then needs
Want snell law, i.e. n1sinθ1=n2sinθ2, wherein n1And n2It is the refractive index of two media, θ respectively1And θ2Be respectively into
It penetrates light or reflects the angle of light and interface discovery, be called incidence angle and refraction angle.Principle is as follows: if incidence angle θ1Equal to a certain
A angle θcWhen, refracted light is carried out along the tangent line of refracting interface, i.e., refraction angle is 90 °, at this time sin θ2=1, then it can push away to obtain sin
θc=sin θ1=n2/n1.But if incidence angle θ1Greater than this value θcWhen, the sinusoidal sin θ of incidence angle1> n2/n1, sin can be pushed away to obtain
θ2> 1, this is mathematically nonsensical, so only existing reflected light there is no refraction light at this time, is then just occurred
Total reflection.What the angle of the reflecting surface 33 and the light reflected through optical surface 32 was arranged according to snell law, i.e., by lens unit
30 refractive index n1With the refractive index n of air2To determine optical surface 32 and by the corner dimension between transparent surface 42.
In addition, the reflecting surface 33 is also possible to curved surface it should also be noted that, the reflecting surface 33 can be plane, this is anti-
It is curved surface that penetrate face 33, which can also be partially planar section, does not do specific restriction herein.
The present invention proposes a kind of projector, which includes shell and be installed on the intracorporal light engine 100 of shell, should
The specific structure of light engine 100 is referring to above-described embodiment, since this projector uses whole skills of above-mentioned all embodiments
Art scheme, therefore at least all beneficial effects brought by the technical solution with above-described embodiment, this is no longer going to repeat them.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (8)
1. a kind of light engine, it is applied to projector, which is characterized in that the light engine includes:
Lighting unit；
Imaging unit is installed on the light emission side of the lighting unit；
Lens unit is installed between the lighting unit and the imaging unit, and the lens unit, which has, faces the photograph
The caustic surface of bright unit, in face of the optical surface of the imaging unit and positioned at the caustic surface and described optical surface the same side
The light that reflecting surface, the optical surface and the lighting unit issue is arranged in angle, is reflected through the light of the caustic surface extremely
The light of the reflecting surface and transmission through the reflective surface；
Polarization unit is installed between the lens unit and the imaging unit, the polarization unit have in face of it is described at
As the plane of polarization of unit, the plane of polarization and the optical surface are in that the angle greater than 0 ° is arranged, and can be reflected or transmitted light；With
And
LCOS chip is installed between the polarization unit and the imaging unit, described in the LCOS chip reflectance-transmittance partially
The light in vibration face is to the plane of polarization, so that the light of LCOS chip reflection reflexes to the imaging list by the plane of polarization
Member.
2. light engine as described in claim 1, which is characterized in that the light that the plane of polarization is issued with the lighting unit is in
45 ° of angle settings, the plane of polarization are also arranged with the LCOS chip in 45 ° of angles.
3. light engine as described in claim 1, which is characterized in that the polarization unit also have in face of the optical surface and
With plane of polarization transparent surface disposed in parallel, spacing between the transparent surface and the optical surface is from the one of the transparent surface
The other side of the lateral transparent surface is gradually increased setting.
4. light engine as described in claim 1, which is characterized in that the polarization unit list have in face of the optical surface and
It is in the transparent surface that the angle greater than 0 ° is arranged with the plane of polarization, spacing between the transparent surface and the optical surface is from described
One side of transparent surface is gradually increased setting to the other side of the transparent surface.
5. light engine as described in claim 1, which is characterized in that the caustic surface is arranged in convexity arc surface, has pre-
Fixed curvature, so that the light by the caustic surface all converges at the optical surface.
6. light engine as described in claim 1, which is characterized in that the reflecting surface is coated with reflecting material.
7. light engine as described in claim 1, which is characterized in that the reflecting surface and the optical surface are arranged in angle,
So that the light through the reflective surface is all arranged through the optical surface.
8. a kind of projector, which is characterized in that draw including shell and optics as claimed in any of claims 1 to 7 in one of claims
It holds up, the light engine is installed in the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522582.2A CN110174813A (en) | 2019-06-17 | 2019-06-17 | Light engine and projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910522582.2A CN110174813A (en) | 2019-06-17 | 2019-06-17 | Light engine and projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110174813A true CN110174813A (en) | 2019-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910522582.2A Pending CN110174813A (en) | 2019-06-17 | 2019-06-17 | Light engine and projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110174813A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203838464U (en) * | 2014-05-15 | 2014-09-17 | 广景科技有限公司 | Linear DLP micro projector |
| CN105182456A (en) * | 2015-09-11 | 2015-12-23 | 成都迅达光电有限公司 | Prism and projector |
| CN205157822U (en) * | 2015-09-11 | 2016-04-13 | 成都迅达光电有限公司 | Prism and projecting apparatus |
| CN208654519U (en) * | 2018-09-05 | 2019-03-26 | 成都迅达光电有限公司 | The light engine and projector of projector |
| CN209979998U (en) * | 2019-06-17 | 2020-01-21 | 成都晶华光电科技股份有限公司 | Optical engine and projector |
-
2019
- 2019-06-17 CN CN201910522582.2A patent/CN110174813A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203838464U (en) * | 2014-05-15 | 2014-09-17 | 广景科技有限公司 | Linear DLP micro projector |
| CN105182456A (en) * | 2015-09-11 | 2015-12-23 | 成都迅达光电有限公司 | Prism and projector |
| CN205157822U (en) * | 2015-09-11 | 2016-04-13 | 成都迅达光电有限公司 | Prism and projecting apparatus |
| CN208654519U (en) * | 2018-09-05 | 2019-03-26 | 成都迅达光电有限公司 | The light engine and projector of projector |
| CN209979998U (en) * | 2019-06-17 | 2020-01-21 | 成都晶华光电科技股份有限公司 | Optical engine and projector |
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