CN104656362B - Projector - Google Patents
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- CN104656362B CN104656362B CN201510073843.9A CN201510073843A CN104656362B CN 104656362 B CN104656362 B CN 104656362B CN 201510073843 A CN201510073843 A CN 201510073843A CN 104656362 B CN104656362 B CN 104656362B
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- face
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- digital micro
- projector
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- 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
- G03B21/142—Adjusting of projection optics
-
- 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
- G03B21/28—Reflectors in projection beam
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The present invention provides a kind of projector and includes light source, digital micro-mirror device, camera lens, the first prism and the second prism.Light source is used to send incident light.Digital micro-mirror device in orthogonal first direction and second direction have respectively first while and when second, digital micro-mirror device is received and reflects incident light for imaging.Camera lens is used to receive and projection imaging light.First prism is arranged between light source and digital micro-mirror device, is used to receive and transmit light.First prism includes neighbouring light source and receives the first face of the incident light, adjacent first face and reflection incident light to the second face of digital micro-mirror device, the 3rd face of parallel digital micro-mirror device.Second prism is arranged between the first prism and camera lens, for receiving and transmits imaging.Fourth face of second prism comprising parallel second face, and adjacent fourth face and fiveth face relative with camera lens.
Description
Technical field
A kind of projector of present invention description, espespecially a kind of projector with the convertible digital micro-mirror device of two axles.
Background technology
Projector, can using image-forming principle and by digital micro-mirror device (Digital Micro-mirror Device)
Micro image is projected on upper jumbo screen, and enough brightness is provided, image information is shared with everybody.
Fig. 1 is the element architecture figure of conventional projectors 50, as shown in figure 1, conventional projectors 50 contain digital micro-mirror dress
10 are put, (Total Internal Reflection, TIR) prism group 11, speculum 12, lens module 13, Yi Jiguang is totally reflected
Conduit (Light Pipe) 14.3 axial directions of rectangular coordinate system are shown in order to define view directions, on the right of Fig. 1.With Fig. 1
For, X-axis is the direction by origin to the right, Y-axis be by origin downwardly direction, Z axis be refer into direction.In conventional projectors
In 50, light passes through lens module 13 via photoconductive tube 14, then reflexes to total-reflection prism group 11 via speculum 12, most passes through afterwards
Imaging is reached into camera lens by digital micro-mirror device 10 and is projected on screen.However, the digital micro-mirror dress of conventional projectors 50
10 are put because the limitation of physical characteristic, can only receive incident light to slant incidence.Therefore, total-reflection prism group 11 is relatively digital micro-
Lens device 10 inclines an angle and sets (such as 45 degree), and this will cause the volume of conventional projectors 50 to be restricted, micro- pursuing
Today of little Hua projectors, the excessive volume of conventional projectors 50 will cause convenience not enough and gradually lose competitiveness.
Therefore, it is very important to develop a kind of projector of small volume.
The content of the invention
It is an object of the invention to provide a kind of projector, it has less volume.
To reach above-mentioned purpose, the present invention proposes a kind of projector, comprising light source, digital micro-mirror device, camera lens, the first rib
Post and the second prism.Light source is used to send incident light.Digital micro-mirror device is in orthogonal first direction and second direction point
Not Ju You first while and when second, in the second side, digital micro-mirror device is received and reflects incident light for imaging first length of side, into
As light is advanced along third direction, and the vertical first direction of third direction.Camera lens is for receiving simultaneously projection imaging light, the first prism
It is disposed between light source and digital micro-mirror device, for receiving and transmits light.First prism includes the first face, the second face and the
Three faces.First face is to be adjacent to light source and for receiving incident light, and the second face is to be adjacent to the first face and for reflecting incident light
To digital micro-mirror device, the 3rd face is parallel to digital micro-mirror device and is adjacent to the first face with adjacent side, and adjacent side is also
Parallel to the first side.Second prism is disposed between the first prism and camera lens, for receiving and transmits imaging.Second prism bag
Containing fourth face and the 5th face, fourth face is parallel to the second face, and the 5th face is to be adjacent to fourth face, and relative with camera lens.
Preferably, the digital micro-mirror device is the convertible digital micro-mirror device of two axles.
Preferably, parallel 3rd face in the 5th face.
Preferably, also including：
First angle, positioned between first face and second face；
Second angle, positioned between second face and the 3rd face；And
3rd angle, positioned between the 3rd face and first face；
Wherein, the 3rd angle is more than first angle and second angle.
Preferably, the direction in the incident light beam strikes first face is perpendicular to first face.
Preferably, the third direction is perpendicular to the 5th face.
Preferably, having gap between second face and the fourth face.
Preferably, having gap between the digital micro-mirror device and the 3rd face.
Preferably, lens module is also included, located between the light source and first face.
Preferably, the effective focal length of the lens module is between 80mm~82mm.
Preferably, also including：Photoconductive tube, located between the light source and the lens module, is used to receive and transmit the incident light.
The photoconductive tube is wedge-shaped light guide.Preferably, the photoconductive tube, the lens module, first prism, second prism, the numeral
Micro-mirror device constitutes optical-mechanical system, and the enlargement ratio of the optical-mechanical system is between 1.65~1.85.
Compared with prior art, a kind of projector of the invention, its designing axiom is using convertible digital micro- of two axles
Lens device, makes total-reflection prism group not have unnecessary angle with digital micro-mirror device.Therefore, compared to traditional projector,
Its small volume of projector of the invention, and the space configuration of element can obtain further optimization, therefore more using upper
Convenience.
Brief description of the drawings
Fig. 1 is the element architecture figure of conventional projectors.
Fig. 2 is the element architecture figure of the projector of the embodiment of the present invention.
Fig. 3 is two schematic diagrames of prism structure in the projector of Fig. 2 embodiments.
Fig. 4 is the side view of the projector of Fig. 2 embodiments.
Fig. 5 is the light path simulation drawing of the projector of another embodiment of the present invention.
Specific embodiment
Fig. 2 is the element architecture figure of the projector 100 of the embodiment of the present invention.As shown in Fig. 2 projector 100 contains number
Word micro-mirror device (Digital Micro-mirror Device) 20, lens module 21, photoconductive tube (Light Pipe) 22, light
Source 23, camera lens 24, the first prism S1 and the second prism S2.Light source 23 is used for launching incident light A.Digital micro-mirror device 20 is square
The plane device of shape, with a plurality of micro mirrors for reflecting incident light A for imaging B, and digital micro-mirror device 20 has phase
Mutual vertical side C long and short side D (shown in Fig. 4).In the present embodiment, digital micro-mirror device 20 is the convertible crystalline substance of two axles
Piece group (TRP (Tilt＆Roll Pixel)PicoTMChipset), its micro mirror may be reversed in the state of ON, OFF two.When
Micro mirror be OFF state when, each micro mirror along two axles respectively upset 17 degree with by incident light A with about 34~36 degree of angle reflection be imaged
Light B.Camera lens 24 is used for receiving imaging B.First prism S1 and the second prism S2 are arranged at lens module 21, digital micro-mirror dress
Put between 20 and camera lens 24, be used to receive transmitted by lens module 21 incident light A, reflexed to digital micro-mirror device 20,
And imaging B is transmitted to camera lens 24.In projector 100, after the transmitting incident light of light source 23 A, incident light A is via photoconductive tube 22
Penetrate lens module 21, the first prism S1 is reached along light path L1, and be all-trans along light path L2 that to be incident upon numeral micro- in the first prism S1
Lens device 20；The reflection incident light of digital micro-mirror device 20 A is imaging B, and imaging B is returned in the first prism S1 along light path L3, into
The first prism S1 and the second prism S2 is then sequentially penetrated as light B, and enters camera lens 24, detailed light transmission feelings along light path L4
Condition will be in describing in detail hereinafter.In order to define view directions, the upper right corner of Fig. 2 shows 3 axial directions of rectangular coordinate system.With Fig. 2
Speech, to point out direction, Y-axis is that, by origin upwardly direction, Z axis are origin direction to the left to X-axis.In the present embodiment, first
There is gap between prism S1 and the first prism S2, there is gap, but this hair between the first prism S1 and digital micro-mirror device 20
Bright not limited to this, in other embodiments, between the first prism S1 and the first prism S2, the first prism S1 and digital micro-mirror device 20
Between can be to be brought into close contact.The structure of the first prism S1 and the first prism S2 in projector 100 is will be detailed below, and
Light how between two prisms reflect detailed process.
Fig. 3 is the schematic diagram of the first prism S1 and the second prism S2 structures in the projector 100 of Fig. 2 embodiments.In this reality
Apply in example, the first prism S1 is triangular prism, with five planes, comprising the first triangular form plane TP1, the second triangular form plane
TP2, the first face P1, the second face P2 and the 3rd face P3.And the first face P1 and the second face P2 fold first included angle A 1, the second face
P2 and the 3rd face P3 fold the second included angle A 2, the 3rd face P3 and a first face P1 and fold the 3rd included angle A 3.In this implementation
In example, the 3rd included angle A 3 can be more than the first included angle A 1 and the second included angle A 2.For example, the first included angle A 1 is 52.31 degree, second
Included angle A 2 is 29.50 degree, and the 3rd included angle A 3 is 98.19 degree.Second prism S2 is also triangular prism, with five planes, comprising
3rd triangular form plane TP3, the 4th triangular form plane TP4, fourth face P4, the 5th face P5 and the 6th face P6.And fourth face P4 with
5th face P5 folds the 4th included angle A 4, and fourth face P4 and the 6th face P6 folds the 5th included angle A 5, the 5th face P5 and
Six face P6 fold the 6th included angle A 6.In the present embodiment, the 4th included angle A 4 can be equal to the second included angle A 2.Citing comes
Say, the 4th included angle A 4 is 29.50 degree, the 5th included angle A 5 is 95.50 degree, and the 6th included angle A 6 is 55.50 degree.In the present embodiment,
First prism S1 and the second prism S2 will meet following locality condition：The 3rd face P3 of the first prism S1 is parallel to the second prism
Fourth face P4s of the second face P2 of the 5th face P5 of S2, the first prism S1 parallel to the second prism S2；Also, the first prism S1's
3rd face P3 must (parallel in Y-axis) parallel with the digital micro-mirror device 20 in Fig. 2, and the 3rd face P3 of the first prism S1 and
Simultaneously the adjacent side E of P1 must be parallel (parallel in X-axis) with the side C long of digital micro-mirror device 20.
Below by according to the structure of Fig. 2 and Fig. 3 in detail, the process of incident light A and imaging B transmission in projector 100 is described in detail.
In Fig. 2, incident light A is received by photoconductive tube 22 immediately from after the transmitting of light source 23.Photoconductive tube used by the present embodiment can be wedge shape
(Wedge) photoconductive tube 22, i.e. photoconductive tube 22 receive the lighting area of the incidence surface product more than output incident light A of incident light A, because
This can effectively lift photoconductive tube 22 and receive light quantity (coupling efficiency).Incident light A sequentially penetrate photoconductive tube 22 and thoroughly
Mirror module 21.The function of lens module 21 is, using the physical characteristic boundling incident light A for focusing on, incident light A is thrown exactly
Penetrate in digital micro-mirror device 20.Lens module 21 in embodiment is the lens composition of at least more than one, and its equivalent focal length exists
Between 80~82mm, but other embodiments can also use other focal lengths.Incident light A vertically enters afterwards through lens module 21
Penetrate the first face P1 in the first prism S1, that is, the incident light A incident normal vector (Normal for being oriented parallel to the first face P1
Vector).Incident light A reflects in advancing according to light path L1 in the first prism S1 until by the second face P2 of the first prism S1.This
Reflection is herein total reflection (Total Internal Reflection), therefore incident light A is via still can be in identical Jie after reflection
Transmission in matter (the first prism S1), and after incident light A is totally reflected via the second face P2, advancing along light path L2, eventually passes through the
The 3rd face P3 of one prism S1 and the digital micro-mirror device 20 that arrives.Here, digital micro-mirror device 20 has length respectively at X-axis and Y-axis
Side C and short side D, and the adjacent side E of the 3rd face P3 and the first face P1 of the first prism S1 puts down with the side C long of digital micro-mirror device 20
Row (parallel in X-axis).Therefore, incident light A can be considered incident light A courts along light path L2 incidence digital micro-mirror devices 20 in X-Y plane
The side C long incidences (as shown in Figure 4) of digital micro-mirror device 20.In the present embodiment, due to digital micro-mirror device 20 for two axles are turned over
Rotatable chipset (TRP (Tilt＆Roll Pixel)PicoTMChipset), its micro mirror is along the respectively upset 17 of two axles
Degree.Therefore, when incident light A is along light path L2 incidence digital micro-mirror devices 20, can be by about in being reflected into imaging B with 34~36 degree.
Imaging B sequentially advances along light path L3, through the 3rd face P3 and the second face P2 of the first prism S1.Here, light path L3 is about with
Three face P3 are vertical.After imaging B is reflected between the first prism S1, the second prism S2 because of air dielectric, sequentially along light path L4
Advance, through the fourth face P4 and the 5th face P5 of the second prism S2.Here, because the 5th face P5 of the second prism S2 is parallel to
The 3rd face P3 of one prism S1, and the second prism S2 of light path L4 parallel light path L3, imaging B near vertical incidence the 5th face
P5, therefore imaging B is directed through the 5th face P5 and will be connect by camera lens 24 without having any reflection, last imaging B
Receive.
In projector 100, the size of digital micro-mirror device 20 is about 1.65~1.85 in contrast to the size of photoconductive tube 22
Times, it is equivalent to enlargement ratio and is about 1.65~1.85 times.And it is used to receive the camera lens 24 of imaging B, its aperture size is F1.7
Aperture.However, the enlargement ratio and aperture size used by the present invention are but not limited, can use in other embodiments
Any enlargement ratio, and any f-number (such as bigger F1.5 apertures) realizes projector 100.
Fig. 4 is the side view of the projector 100 of Fig. 2 embodiments.As shown in figure 4, the side view outward appearance of projector 100 is included
Total reflection (Total Internal Reflection, TIR) prism group 25, digital micro-mirror device 20, lens module 21 and light
Conduit 22.In order to define view directions, the upper right corner of Fig. 4 shows 3 axial directions of rectangular coordinate system.For Fig. 4, X-axis is
By origin direction to the left, Y-axis is that, by origin upwardly direction, Z axis are to enter direction by finger.And total-reflection prism group 25 is contained
The framework of the first prism S1 and the second prism S2 described in Fig. 3.Digital micro-mirror device of the present invention 20 uses the convertible crystalline substance of two axles
Piece group (TRP (Tilt＆Roll Pixel)PicoTMChipset), the 3rd face P3 and the first face P1 of the first prism S1
Adjacent side E parallel to digital micro-mirror device 20 side C (as shown in Figures 3 and 4) long, and incident light A is by light path L2 towards number
The side C long of word micro-mirror device 20 is incident.Therefore, different from projector 50 traditional in Fig. 1, the relative number of total-reflection prism group 11
The angle of inclination of word micro-mirror device 10 is set.In Fig. 4, total-reflection prism group 25 is filled with digital micro-mirror for projector of the invention 100
Put 20 and do not have unnecessary angle.And with Z axis to visual angle for, incident light A and imaging B are almost with rectilinear direction via light
Conduit 22, lens module 21, total-reflection prism group 25 be transferred to digital micro-mirror device 20 (incident light A and imaging B in Fig. 2,
Reflected in the first prism S1 and digital micro-mirror device 20 in Y-Z plane respectively, if therefore with Z axis to visual angle see it, its
It is straight ahead).In fig. 4, because total-reflection prism group 25 does not have unnecessary angle with digital micro-mirror device 20, therefore throw
Compared with traditional projector 50, its space configuration is optimized the volume of shadow machine 100.
Fig. 5 is the incident light A light path simulation drawings of the projector 200 of another embodiment of the present invention.As shown in figure 5, projector
200 side view outward appearance includes total-reflection prism group 25, digital micro-mirror device 20, lens module 21, photoconductive tube 22 and reflection
Mirror 26.Projector 200 is similar to projector 100, and its difference is only that and make use of speculum 26, will pass through the incidence of lens module
Light A is reflexed in total-reflection prism group 25, with the further volume of reduced projection machine 200.In order to define view directions, Fig. 5's
The upper left corner shows 3 axial directions of rectangular coordinate system.In Figure 5, to point out direction, Y-axis is by origin upwardly direction, Z to X-axis
Axle is origin direction to the left.Photoconductive tube 22 reaches incident light A in lens module 21, and lens module 21 gathers incident light A
It is defocused, via reflected light path as described in Figure 5, incident light A is reflexed in the pixel coverage of digital micro-mirror device 20.And entering
Penetrate during light A reflects, it is possible to have a situation of light leak, but the energy of the energy of this light leak and entirety incident light A
It is insignificant that amount is compared.
In sum, the invention discloses a kind of projector, its designing axiom is to be filled using the convertible digital micro-mirror of two axles
Put, total-reflection prism group is not had unnecessary angle with digital micro-mirror device.Therefore, compared to traditional projector, this hair
Its small volume of bright projector, and the space configuration of element can obtain further optimization, therefore more use is upper just
Profit.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to the claims in the present invention with repair
Decorations, should all belong to covering scope of the invention.
Claims (12)
1. a kind of projector, it is characterised in that include：
Light source, sends incident light；
Digital micro-mirror device, in orthogonal first direction and second direction have respectively first while and when second, this first
In second side, the digital micro-mirror device is received and reflects the incident light for imaging the length of side, and the imaging is along third direction row
Enter, the vertical first direction of the third direction, the digital micro-mirror device is the convertible digital micro-mirror device of two axles；
Camera lens, receives and projects the imaging；And
First prism, is arranged between the light source and the digital micro-mirror device, receives and transmit the incident light and the imaging, and this
One prism is included：
First face, the neighbouring light source and receives the incident light；
Second face, abuts first face and reflects the incident light to the digital micro-mirror device；And
3rd face, first face is abutted parallel to the digital micro-mirror device and with adjacent side, the adjacent side parallel to this first
Side, second face reflects the incident light and passes through the 3rd face to the digital micro-mirror device；And
Second prism, is arranged between first prism and the camera lens, receives and transmit the imaging, comprising：
Fourth face, parallel to second face；And
5th face, adjacent fourth face and relative with the camera lens.
2. projector as claimed in claim 1, it is characterised in that the 5th face is parallel to the 3rd face.
3. projector as claimed in claim 1, it is characterised in that also include：
First angle, positioned between first face and second face；
Second angle, positioned between second face and the 3rd face；And
3rd angle, positioned between the 3rd face and first face；
Wherein, the 3rd angle is more than first angle and second angle.
4. projector as claimed in claim 1, it is characterised in that the direction in the incident light beam strikes first face perpendicular to this
Simultaneously.
5. projector as claimed in claim 1, it is characterised in that the third direction is perpendicular to the 5th face.
6. projector as claimed in claim 1, it is characterised in that there is gap between second face and the fourth face.
7. projector as claimed in claim 1, it is characterised in that between having between the digital micro-mirror device and the 3rd face
Gap.
8. projector as claimed in claim 1, it is characterised in that also include：
Lens module, located between the light source and first face.
9. projector as claimed in claim 8, it is characterised in that the effective focal length of the lens module 80mm~82mm it
Between.
10. projector as claimed in claim 9, it is characterised in that also include：
Photoconductive tube, located between the light source and the lens module, is used to receive and transmit the incident light.
11. projectors as claimed in claim 10, it is characterised in that the photoconductive tube is wedge-shaped light guide.
12. projectors as claimed in claim 10, it is characterised in that the photoconductive tube, the lens module, first prism, should
Second prism and the digital micro-mirror device constitute optical-mechanical system, and the enlargement ratio of the optical-mechanical system is between 1.65~1.85.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510073843.9A CN104656362B (en) | 2015-02-12 | 2015-02-12 | Projector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510073843.9A CN104656362B (en) | 2015-02-12 | 2015-02-12 | Projector |
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| CN104656362A CN104656362A (en) | 2015-05-27 |
| CN104656362B true CN104656362B (en) | 2017-06-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105759548A (en) * | 2016-04-15 | 2016-07-13 | 苏州佳世达光电有限公司 | Projector |
| TWI682229B (en) * | 2018-04-27 | 2020-01-11 | 華冠通訊股份有限公司 | Projector device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565897A (en) * | 2010-12-30 | 2012-07-11 | 比亚迪股份有限公司 | Prism system and projector with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100381262B1 (en) * | 2000-08-10 | 2003-04-26 | 엘지전자 주식회사 | Total Internal Reflection Prism System using the Digital Micromirror Device |
| CN1609655A (en) * | 2003-10-21 | 2005-04-27 | 台达电子工业股份有限公司 | Reflective projection display system |
| CN100343722C (en) * | 2004-12-17 | 2007-10-17 | 扬明光学股份有限公司 | Projection display system |
| CN1811522A (en) * | 2005-01-27 | 2006-08-02 | 乐金电子（沈阳）有限公司 | Optical system for projection image display equipment |
| WO2009095406A1 (en) * | 2008-01-28 | 2009-08-06 | Upstream Engineering Oy | Double-reverse total-internal-reflection-prism optical engine |
| CN102621698A (en) * | 2012-03-31 | 2012-08-01 | 福建网讯科技有限公司 | Optical projection system for improving stray light near projection picture |
| US9500866B2 (en) * | 2013-04-04 | 2016-11-22 | Texas Instruments Incorporated | Near display and imaging |
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- 2015-02-12 CN CN201510073843.9A patent/CN104656362B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565897A (en) * | 2010-12-30 | 2012-07-11 | 比亚迪股份有限公司 | Prism system and projector with same |
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