CN102162982B - Projector and optical path control method thereof - Google Patents
Projector and optical path control method thereof Download PDFInfo
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- CN102162982B CN102162982B CN 201110093865 CN201110093865A CN102162982B CN 102162982 B CN102162982 B CN 102162982B CN 201110093865 CN201110093865 CN 201110093865 CN 201110093865 A CN201110093865 A CN 201110093865A CN 102162982 B CN102162982 B CN 102162982B
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Abstract
The invention discloses a projector. The projector comprises a light source, a polarizing beam splitting unit, a first micro-display chip, a second micro-display chip, a first six-axis adjustment device, a second six-axis adjustment device and a projection lens, wherein the light source is used for emitting an illumination beam; the illumination beam is split by the polarizing beam splitting unit to obtain an S-polarized beam and a P-polarized beam; and the S-polarized beam and the P-polarized beam are respectively modulated and combined to one beam through the space arrangement of the polarizing beam splitting unit, the first micro-display chip, the second micro-display chip and the projection lens. Therefore, the beam emitted by the projector contains the S-polarized beam and the P-polarized beam, thereby achieving 3D display by projecting the beam on a metal screen. The projector has low cost, miniaturized design and convenience in operation, and has no obvious difference with the common 2D projector in the playing, focusing and other operations. Therefore, the projector is convenient in operation when being used for playing 3D movies so as to facilitate the popularization of 3D movies, and the common people can watch 3D images at home.
Description
Technical field
The present invention relates to field of projection display, particularly relate to the control method of a kind of projector and light path thereof.
Background technology
Existing 3D film is play, be the twin-lens mode, need two identical general projectors, before the projection lens of two projector, add respectively mutually orthogonal linear polarization eyeglass, by the polarization of linear polarization eyeglass to light beam, two linear polarization eyeglasses are outgoing S polarized light and P-polarized light respectively, this S polarized light and P-polarized light is projected on the screen that does not change incident light polarization state, such as metal screen, frosted screen.Afterwards, the beholder wears the 3D glasses, and the left and right sides eyeglass of 3D glasses adopts respectively the polarized lenses of different polarization direction, and beholder's right and left eyes just can receive respectively the picture of one of them polarization direction like this, again can the compound stereoscopic image through brain.The broadcast mode of above-mentioned 3D film, cost is very high, and operate very complicated, at first, the screen position will be fixed in advance, then needs respectively two projector focusing and adjusts the angle of inclination of projection lens projects, the image high precision that projects on the screen is overlapped, operator professional required high, be difficult to popularly, only be applied at present movie theatre.
Summary of the invention
Technical matters to be solved by this invention is: remedy above-mentioned the deficiencies in the prior art, propose a kind of projector and method for controlling optical path thereof, so that it is easy and simple to handle when being applied to the 3D film and playing, make things convenient for popular that the 3D film plays.
Technical matters of the present invention is solved by following technical scheme:
A kind of projector comprises light source, polarization spectro unit, the first micro display chip, the second micro display chip, the one or six axis adjustment device, the two or six axis adjustment device and projection lens; Described light source emissive lighting light beam; Described polarization spectro unit is arranged at the outlet of described light source, the S polarized light in receiving beam and the reflection receivable light beam, the P-polarized light in the transmission receiving beam; Described the first micro display chip and described the second micro display chip are arranged at the adjacent light outlet side of described polarization spectro unit; Described the first micro display chip receives the S polarized light of described illuminating bundle, and it is modulated into the P-polarized light, and is reflected back described polarization spectro unit; Described the second micro display chip receives the P-polarized light of described illuminating bundle, and it is modulated into S polarized light, and is reflected back described polarization spectro unit; The one or six axis adjustment device is connected with described the first micro display chip, is used for adjusting the position of described the first micro display chip; The two or six axis adjustment device is connected with described the second micro display chip, is used for adjusting the position of described the second micro display chip; Described projection lens and described polarization spectro unit, described the first micro display chip interval are oppositely arranged, and be used for receiving the light beam of described polarization spectro unit outgoing and it is amplified output.
Technical matters of the present invention is solved by following further technical scheme:
A kind of control method of projector light path may further comprise the steps: 1) illumination beam is carried out the polarization spectro processing, and the S polarized light in the described illuminating bundle and P-polarized light are penetrated along both direction respectively; 2) S polarized light in the described illuminating bundle is carried out Polarization Modulation and process, it is modulated into the P-polarized light; P-polarized light in the described illuminating bundle is carried out Polarization Modulation process, it is modulated into S polarized light; 3) with step 2) in the described P-polarized light that obtains and the synthetic a branch of light beam of S polarized light; 4) described light beam synthetic in the step 3) is amplified the rear output of processing.
The beneficial effect that the present invention is compared with the prior art is:
Projector of the present invention, utilize the polarization spectro unit to the light splitting of carrying out of light beam, and the spatial placement by polarization spectro unit and the first micro display chip, the second micro display chip and projection lens, synthetic a branch of light beam again after the S polarized light that separates and P-polarized light modulated respectively, so that the light beam of projector outgoing namely is the light beam that comprises S polarized light and P-polarized light, follow-uply project to the demonstration that namely can be used for 3D on the metal screen.Projector cost of the present invention is low, microminiaturization, easily operation, playing the operation such as focusing does not obviously distinguish with common 2D projector, so that it is easy and simple to handle when being applied to the 3D film and playing, make things convenient for popular that the 3D film plays, can allow masses be in and just can watch the 3D image.
Description of drawings
Fig. 1 is the inside index path of the polarization spectro unit in the projector of the specific embodiment of the invention when selecting the grating polarization optical splitter;
Fig. 2 is the inside index path of the polarization spectro unit in the projector of the specific embodiment of the invention when selecting polarization splitting prism;
Fig. 3 is the first micro display chip and the second micro display chip input picture graph of a relation of the specific embodiment of the invention;
Fig. 4 is the image that the projector of the specific embodiment of the invention presents in exterior screen when inputting image shown in Figure 2;
Fig. 5 is the control method process flow diagram of the projector light path of the specific embodiment of the invention.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is described in further details.
As shown in Figure 1, be the inner index path of the projector of this embodiment.Projector comprises light source 1, polarization spectro unit 2, the first micro display chip 3, the second micro display chip 4, the one or six axis adjustment device 5, the two or six axis adjustment device 6 and projection lens 7.
Wherein, light source 1 is LED, the emissive lighting light beam.Light source also can be selected other unpolarized light source such as Halogen lamp LED except selecting the LED, also can select the linear polarization light source that comprises P-polarized light and S polarized light.
Preferably, the parameter of polarization spectro unit 2 is: Rs＞0.8; Tp＞0.8; Divide backscatter extinction logarithmic ratio
For: 0.9≤
≤ 1; The reflected light extinction ratio
For:
＞100:1; The transmitted light extinction ratio
For:
＞100:1; Wherein, Rs is the reflectivity to S polarized light, and Rp is the reflectivity to the P-polarized light, and Ts is the transmissivity to S polarized light, and Tp is the transmissivity to the P-polarized light.When the parameter of polarization spectro unit 2 satisfies above-mentioned the setting, can play better spectrophotometric result to P-polarized light and S polarized light, the P-polarized light of telling and S polarized light are each other without crosstalking, when the synthetic light beam of follow-up formation is used for the 3D Projection Display, can make the chroma-luminance high conformity of the image of projection, the good contrast of image (dark clearly demarcated), (right and left eyes is only seen respectively a wherein width of cloth image to the 3D good contrast, image is crosstalked lower), namely bring 3D viewing effect more true to nature to the beholder.
The first micro display chip 3 and the second micro display chip 4 are the LCOS micro-display, and both are arranged at the adjacent light outlet side 21 and 22 of polarization spectro unit 2.When the S polarized light component in the illuminating bundle was incident to the first micro display chip 3, the first micro display chip 3 was modulated into the P-polarized light with the S polarized light component of illuminating bundle, and was reflected back polarization spectro unit 2; When the P-polarized light component in the illuminating bundle was incident to the second micro display chip 4, the first micro display chip 3 was modulated into S polarized light with the P-polarized light component of illuminating bundle, and was reflected back polarization spectro unit 2.When the P-polarized light after the above-mentioned modulation is reflected back polarization spectro unit 2, polarization spectro unit 2 is to its transmission, when the S polarized light after the above-mentioned modulation is reflected back polarization spectro unit 2, polarization spectro unit 2 is to its reflection, behind polarization spectro unit 2, the P-polarized light of modulation and S polarized light synthesize a branch of light beam.
Preferably, the size that above-mentioned polarization spectro unit 2 projects to the first micro display chip 3 place sides and the second micro display chip 4 place sides is respectively L1 and L2, described the first micro display chip effectively show dimensions as L3, described the second micro display chip effectively show dimensions as L4, satisfy: L1＞L3, L2＞L4.Satisfy this size relation, can guarantee that the polarization spectro unit 2 that passes through that the image information of each micro display chip can be complete is delivered to projection lens 7.
The one or six axis adjustment device 5 is connected with the first micro display chip 3, is used for adjusting the position of the first micro display chip 3; The two or six axis adjustment device 6 is connected with the second micro display chip 4, is used for adjusting the position of the second micro display chip 4.Two 6 axis adjustment devices comprise XY translation slide unit, XY gradient slide unit, Z-axis direction translation guide rail, and the platform that rotates around Z axis, respectively the position of corresponding LCOS micro-display is adjusted, thereby to the sharpness of the image that arrives projection lens 7, the best adjustment is carried out in the aspects such as consistance.
When using projector, at first utilize the position of 5 pairs of the first micro display chips 3 of the one or six axis adjustment device to adjust: 1) the XY translation slide unit of the one or six axis adjustment device 5 to be adjusted, made the center of LCOS micro-display and the central axis of projection lens 7 carry out centering; 2) to the first micro display chip 3 input image information sources, adjust the Z-axis direction translation guide rail of the one or six axis adjustment device 5, make projector projects in the clear picture of extraneous curtain; 3) the Z axis rotation platform of the one or six axis adjustment device 5 is adjusted, making projector projects is horizontality at the image of extraneous curtain; 4) XY gradient slide unit and the Z-axis direction translation guide rail of the one or six axis adjustment device 5 are cooperated adjustment, make projector projects clear consistent at the image view picture of extraneous curtain.Then, utilize the position of 6 pairs of the second micro display chips 4 of the two or six axis adjustment device to adjust according to above-mentioned method of adjustment again, it is clear that the image that the first micro display chip 3 and the second micro display chip 4 are projected overlaps fully.
Need to explanatorily be when this projector uses the image information source of input also to be had certain requirement.When the first micro display chip 3 and the second micro display chip 4 input image information sources are identical image, the first micro display chip 3 and the identical image of the second micro display chip 4 meeting display directions, but behind polarization spectro unit 2 and projection lens 7, under the rolling action of light beam, both images on exterior screen are " mirror image " relation each other, then can't be used for the 3D Projection Display.And when the first micro display chip 3 and the second micro display chip 4 input image information sources are mutually " mirror images " when concerning, as shown in Figure 3, take the input content as shown in the AB, the image of the first micro display chip 3 inputs should be AB, the image of the second micro display chip 4 inputs is BA, and then under the rolling action of light beam, both can realize the image of " binocular parallax " on exterior screen, as shown in Figure 4, could be used for the 3D Projection Display.
In the projector of this embodiment, utilize the light-splitting processing of the 2 pairs of light beams in polarization spectro unit, the spatial relation that cooperates the first micro display chip 3, the second micro display chip 4 and polarization spectro unit 2, the first micro display chip 3 and the second micro display chip 4 receive respectively S polarized light and P-polarized light separately, and the polarisation of light direction that receives is rotated 90 ° modulation, light after the modulation is 2 synthetic a branch of light beams through the polarization spectro unit again, output after projection lens 5 amplifies.The light beam of projector outgoing namely is the light beam that comprises S polarized light and P-polarized light, follow-uply projects to the demonstration that namely can be used for 3D on the metal screen.Projector easily operates when using, get final product by the one or six axis adjustment device 5 and 6 adjustment of the two or six axis adjustment device, play focusing and wait operation and common not obviously difference of 2D projector, so that it is easy and simple to handle when being applied to the 3D film and playing, make things convenient for popular that the 3D film plays.
Also comprise a kind of control method of projector light path in this embodiment, as shown in Figure 5, may further comprise the steps: A1) illumination beam is carried out the polarization spectro processing: the S polarized light in the illuminating bundle and P-polarized light are penetrated along both direction respectively; A 2) S polarized light and the P-polarized light told in the illumination beam carry out modulation treatment: the S polarized light in the illumination beam carries out Polarization Modulation to be processed, and it is modulated into the P-polarized light; P-polarized light in the illumination beam carries out Polarization Modulation to be processed, and it is modulated into S polarized light; A 3) with step 2) in the P-polarized light that obtains and the synthetic a branch of light beam of S polarized light; A 4) light beam synthetic in the step 3) is amplified process rear output.
Preferably, by the polarization spectro unit reflection of the S polarized light in the illuminating bundle is penetrated in the step 1), the P-polarized light transmission in the illuminating bundle is penetrated.
Step 2) carries out Polarization Modulation by the S polarized light in the first micro display chip illumination beam in and process, carry out Polarization Modulation by the P-polarized light in the second micro display chip illumination beam and process.
Described step 3), control P-polarized light and S polarized light are incident to the polarization spectro unit from adjacent both sides, and make described S polarized light through the described P-polarized light of polarization spectro unit transmission and reflection from same outlet outgoing, synthetic a branch of light beam.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, make without departing from the inventive concept of the premise some substituting or obvious modification, and performance or purposes are identical, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. a projector is characterized in that: comprise light source, polarization spectro unit, the first micro display chip, the second micro display chip, the one or six axis adjustment device, the two or six axis adjustment device and projection lens;
Described light source emissive lighting light beam;
Described polarization spectro unit is arranged at the outlet of described light source, the S polarized light in receiving beam and the reflection receivable light beam, the P-polarized light in the transmission receiving beam;
Described the first micro display chip and described the second micro display chip are arranged at the adjacent light outlet side of described polarization spectro unit; Described the first micro display chip receives the S polarized light of described illuminating bundle, and it is modulated into the P-polarized light, and is reflected back described polarization spectro unit; Described the second micro display chip receives the P-polarized light of described illuminating bundle, and it is modulated into S polarized light, and is reflected back described polarization spectro unit;
The one or six axis adjustment device is connected with described the first micro display chip, is used for adjusting the position of described the first micro display chip;
The two or six axis adjustment device is connected with described the second micro display chip, is used for adjusting the position of described the second micro display chip;
Described projection lens and described polarization spectro unit, described the first micro display chip interval are oppositely arranged, and be used for receiving the light beam of described polarization spectro unit outgoing and it is amplified output;
Wherein, the parameter of described polarization spectro unit is: Rs＞0.8; Tp＞0.8; Divide backscatter extinction logarithmic ratio
For:
The reflected light extinction ratio
For:
The transmitted light extinction ratio
For:
Wherein, Rs is the reflectivity to S polarized light, and Rp is the reflectivity to the P-polarized light, and Ts is the transmissivity to S polarized light, and Tp is the transmissivity to the P-polarized light.
2. projector according to claim 1, it is characterized in that: described polarization spectro unit is at the projection size of described the first micro display chip place side effective display size greater than described the first micro display chip, and described polarization spectro unit is at the projection size of described the second micro display chip place side effective display size greater than described the second micro display chip.
3. projector according to claim 1, it is characterized in that: described polarization spectro unit is grating polarization optical splitter or polarization splitting prism.
4. projector according to claim 1, it is characterized in that: described the first micro display chip and described the second micro display chip are the LCOS micro-display.
5. projector according to claim 1, it is characterized in that: described the one or six axis adjustment device and the two or six axis adjustment device comprise XY translation slide unit, XY gradient slide unit, Z-axis direction translation guide rail and the platform that rotates around Z axis.
6. the control method of a projector light path is characterized in that: may further comprise the steps: 1) illumination beam is carried out polarization spectro and is processed, and the S polarized light in the described illuminating bundle and P-polarized light are penetrated along both direction respectively; 2) S polarized light in the described illuminating bundle is carried out Polarization Modulation and process, it is modulated into the P-polarized light; P-polarized light in the described illuminating bundle is carried out Polarization Modulation process, it is modulated into S polarized light; 3) with step 2) in the described P-polarized light that obtains and the synthetic a branch of light beam of S polarized light; 4) with step 3) in synthetic described light beam amplify process after output; Described step 1) by the polarization spectro unit reflection of the S polarized light in the described illuminating bundle is penetrated in, the P-polarized light transmission in the described illuminating bundle is penetrated; Wherein, the parameter of described polarization spectro unit is: Rs＞0.8; Tp＞0.8; Divide backscatter extinction logarithmic ratio
For:
The reflected light extinction ratio
For:
The transmitted light extinction ratio
For:
Wherein, Rs is the reflectivity to S polarized light, and Rp is the reflectivity to the P-polarized light, and Ts is the transmissivity to S polarized light, and Tp is the transmissivity to the P-polarized light.
7. the control method of projector light path according to claim 6, it is characterized in that: by the first micro display chip the S polarized light in the described illuminating bundle is carried out Polarization Modulation described step 2) and process, by the second micro display chip the P-polarized light in the described illuminating bundle is carried out Polarization Modulation and process.
8. the control method of projector light path according to claim 6, it is characterized in that: described step 3), control described P-polarized light and described S polarized light and be incident to the polarization spectro unit from adjacent both sides, and make described S polarized light through the described P-polarized light of described polarization spectro unit transmission and reflection from same outlet outgoing, synthetic a branch of light beam.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6311219B2 (en) * | 2012-07-26 | 2018-04-18 | 株式会社リコー | Illumination light forming device, illumination light source device, and image display device |
| CN106210582B (en) * | 2015-05-06 | 2019-07-26 | 联想(北京)有限公司 | A kind of projecting method, device and electronic equipment |
| CN106324961B (en) | 2016-08-26 | 2019-10-25 | 合肥鑫晟光电科技有限公司 | Image display method and system |
| CN114002899A (en) * | 2021-10-14 | 2022-02-01 | 河南中光学集团有限公司 | LCOS projection optical structure |
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