CN113556522A - Light combination adjusting method for three-piece projector - Google Patents
Light combination adjusting method for three-piece projector Download PDFInfo
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- CN113556522A CN113556522A CN202110684128.4A CN202110684128A CN113556522A CN 113556522 A CN113556522 A CN 113556522A CN 202110684128 A CN202110684128 A CN 202110684128A CN 113556522 A CN113556522 A CN 113556522A
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- monochromatic
- pictures
- screen
- projector
- monochromatic pictures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3147—Multi-projection systems
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
Abstract
The invention discloses a light combination adjusting method of a three-piece projector, which aims at solving the problems that the precision requirement of a mechanical structure of a light combination part is very high, the technical difficulty of the part is high, the cost is high and the application of the three-piece projector is seriously restricted in the prior art, and provides a method for splitting light rays emitted by a light source into R, G, B single-color pictures through a light splitting system; three monochromatic pictures are irradiated to corresponding display devices, and the display area of each display device is set to be larger than the graphic display area; then, the three monochromatic pictures are combined into one path of light through the light combining structure and projected onto a screen through the lens, and finally, the graphic display position on the display device is calibrated, so that the three monochromatic pictures can be projected onto the screen in a completely overlapped manner. The purpose is as follows: by adjusting the electronic position of the three monochromatic pictures, the precision of the mechanical structure of the light combining part is not high, and the technical difficulty and the cost can be greatly reduced.
Description
Technical Field
The invention belongs to the technical field of projection, and particularly relates to a light combination adjusting method for a three-piece projector.
Background
The traditional three-piece projector comprises a 3LCD projector, a 3DLP projector and a 3LCOS projector, wherein the projector divides a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and the three paths of three monochromatic pictures are respectively displayed on three display devices; and finally, combining the light beams into a path of light through a light combining lens, and projecting the light beam onto a screen through a lens.
The existing three-piece projector collects three monochromatic pictures on a display device onto a light combining mirror for combination through the design of a mechanical structure.
However, the prior art has at least the following technical problems:
the clear color picture can be restored only by accurately positioning three monochromatic pictures, so that the precision requirement of a mechanical structure of a light coupling part of the traditional three-piece projector is very high, the technical difficulty of the part is high, the cost is high, and the application of the three-piece projector is severely restricted.
Disclosure of Invention
Aiming at the problems that the precision requirement of a mechanical structure of a light combining part is very high, the technical difficulty of the part is high, the cost is high, and the application of a three-piece projector is seriously restricted in the prior art, the invention provides a light combining adjustment method of the three-piece projector, and the purpose of the method is as follows: the electronic adjustment of the positions of the three monochromatic pictures is carried out, so that the precision of a mechanical structure of the light combining part is not high, and the technical difficulty and the cost can be greatly reduced.
In order to achieve the purpose, the invention adopts the technical scheme that: a light combination adjusting method for a three-piece projector specifically comprises the following steps: dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three display devices;
then, combining the three monochromatic pictures into a light ray through a light combining structure, and projecting the light ray onto a screen through a lens;
and finally, electronically calibrating the positions of the monochromatic pictures on the display device to ensure that the three monochromatic pictures are projected on the screen in a complete superposition manner.
Preferably, the three-chip projector according to the present invention is a 3LCD projector, and claim 1 specifically includes:
dividing a color picture emitted by a signal source into three single-color pictures with three paths of R, G, B primary colors, and respectively displaying each single-color picture on three liquid crystal screens;
setting a display area of the liquid crystal screen to be larger than a display area of a monochromatic picture;
then combining the three monochromatic pictures through a light combining lens, and projecting the three monochromatic pictures to a screen through a lens;
and finally, carrying out position electronic calibration on the monochromatic pictures on the liquid crystal screen, so that the three monochromatic pictures can be projected on the screen in a completely overlapped manner.
Preferably, the calibration of the monochrome picture on the liquid crystal screen specifically comprises the following steps:
and taking any one of the three monochromatic pictures as a reference, adjusting the electronic driving scheme, and moving the positions of the other two monochromatic pictures on the liquid crystal screen to enable the positions of the corresponding monochromatic pictures on the screen to be moved, thereby finally realizing that R, G, B monochromatic pictures are completely overlapped on the screen.
Preferably, the camera is arranged at the front part of the projector, an image projected by a lens of the projector is captured, and then the position of a monochromatic picture on the liquid crystal screen is adjusted through the setting of a calibration algorithm, so that the image captured by the camera is automatically calibrated.
Preferably, the three-piece projector according to the present invention is a 3DLP projector, and claim 1 specifically includes:
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three DMD chips;
setting the display area of the DMD chip to be larger than the display area of the monochromatic picture;
then, combining the three monochromatic pictures through a light-combining prism, and projecting the three monochromatic pictures onto a screen through a lens;
and finally, performing position electronic calibration on the three monochromatic pictures on the DMD chip to ensure that the three monochromatic pictures can be projected on a screen in a completely overlapped manner.
Preferably, the calibration of the three monochromatic pictures on the DMD chip of the present invention specifically comprises: and taking any one of the three monochromatic pictures as a reference, adjusting an electronic driving scheme, moving the positions of the other two monochromatic pictures on the DMD chip, correspondingly moving the positions of the monochromatic pictures on the screen, and finally realizing that R, G, B three monochromatic pictures are completely overlapped on the screen.
Preferably, the camera is arranged at the front part of the projector, an image projected by a lens of the projector is captured, and then the position of a monochromatic picture on the DMD chip is adjusted through the setting of a calibration algorithm so as to realize automatic calibration on the image captured by the camera.
Preferably, the three-chip projector according to the present invention is a 3LCOS projector, and claim 1 specifically includes:
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three Lcos chips;
setting the LCOS chip display area to be larger than the display area of the monochromatic picture;
then, combining the three monochromatic pictures through a light-combining prism, and projecting the three monochromatic pictures onto a screen through a lens;
and carrying out electronic position calibration on the three monochromatic pictures on the LCOS chip so that the three monochromatic pictures can be projected on a screen in a complete superposition manner.
Preferably, the calibration of the three monochromatic pictures on the LCOS chip in the present invention specifically comprises: and taking any one of the three monochromatic pictures as a reference, adjusting the electronic driving scheme, and moving the positions of the other two monochromatic pictures on the LCOS chip to ensure that the positions of the corresponding monochromatic pictures on the screen are also moved, thereby finally realizing that R, G, B monochromatic pictures are completely overlapped on the screen.
Preferably, the camera is arranged at the front part of the projector, an image projected by a lens of the projector is captured, and then the position of the monochromatic picture on the LCOS chip is adjusted through the setting of the calibration algorithm, so that the image captured by the camera is automatically calibrated.
Compared with the prior art, the technical scheme of the invention has the following advantages/beneficial effects:
1. the method for electronically adjusting the position of the monochromatic picture is adopted, the precision of a mechanical structure of the light coupling part is not high, and the technical difficulty and the cost can be greatly reduced.
2. The front end of the projector is provided with the camera, so that automatic calibration is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a primary color light adjustment process in an embodiment of the present invention.
FIG. 2 is a schematic view of an acceptance panel and graphic display area of the present invention.
The labels in the figure are respectively: 1. a display device display area; 2. a monochrome picture display area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.
As shown in the figure, the invention provides a light combination adjusting method for a three-plate projector, which comprises the following steps:
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three display devices;
as shown in fig. 2, the display device display area 1 is set larger than the monochrome picture display area 2;
then, combining the three monochromatic pictures into a light ray through a light combining structure, and projecting the light ray onto a screen through a lens;
the light combining structure does not need high precision, so that after light combination, three monochromatic pictures projected on the screen are not completely overlapped, electronic position calibration is carried out on the monochromatic pictures on the display device, and three primary color pictures can be projected on the screen in a completely overlapped mode, as shown in fig. 1.
Example 1: the three-piece projector is a 3LCD projector.
Dividing a color picture emitted by a signal source into three single-color pictures with three paths of R, G, B primary colors, and respectively displaying each single-color picture on three liquid crystal screens;
setting a display area of the liquid crystal screen to be larger than a display area of a monochromatic picture;
then combining the three monochromatic pictures through a light combining lens, and projecting the three monochromatic pictures to a screen through a lens;
and finally, carrying out position electronic calibration on the monochromatic pictures on the liquid crystal screen, so that the three monochromatic pictures can be projected on the screen in a completely overlapped manner.
The calibration of the monochrome picture on the liquid crystal screen in the embodiment specifically includes:
and taking any one of the three monochromatic pictures as a reference, adjusting the electronic driving scheme, and moving the positions of the other two monochromatic pictures on the liquid crystal screen to enable the positions of the corresponding monochromatic pictures on the screen to be moved, thereby finally realizing that R, G, B monochromatic pictures are completely overlapped on the screen.
In this embodiment, a camera is installed in front of the projector to capture an image projected by a lens of the projector, and then the position of a monochromatic picture on the liquid crystal screen is adjusted by setting a calibration algorithm to automatically calibrate the image captured by the camera.
Example 2: the three-piece projector is a 3DLP projector,
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three DMD chips;
setting the display area of the DMD chip to be larger than the display area of the monochromatic picture;
then, combining the three monochromatic pictures through a light-combining prism, and projecting the three monochromatic pictures onto a screen through a lens;
and finally, performing position electronic calibration on the three monochromatic pictures on the DMD chip to ensure that the three monochromatic pictures can be projected on a screen in a completely overlapped manner.
In this embodiment, the calibration of three monochromatic pictures on the DMD chip specifically includes: and taking any one of the three monochromatic pictures as a reference, adjusting an electronic driving scheme, moving the positions of the other two monochromatic pictures on the DMD chip, correspondingly moving the positions of the monochromatic pictures on the screen, and finally realizing that R, G, B three monochromatic pictures are completely overlapped on the screen.
In this embodiment, a camera is installed in front of the projector to capture an image projected by a lens of the projector, and then the position of a monochrome picture on the DMD chip is adjusted by setting a calibration algorithm to automatically calibrate the image captured by the camera.
Example 3: the three-piece projector is a 3LCOS projector,
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three Lcos chips;
setting the LCOS chip display area to be larger than the display area of the monochromatic picture;
then, combining the three monochromatic pictures through a light-combining prism, and projecting the three monochromatic pictures onto a screen through a lens;
and carrying out electronic position calibration on the three monochromatic pictures on the LCOS chip so that the three monochromatic pictures can be projected on a screen in a complete superposition manner.
In this embodiment, the calibration of three monochromatic pictures on the LCOS chip specifically includes: and taking any one of the three monochromatic pictures as a reference, adjusting the electronic driving scheme, and moving the positions of the other two monochromatic pictures on the LCOS chip to ensure that the positions of the corresponding monochromatic pictures on the screen are also moved, thereby finally realizing that R, G, B monochromatic pictures are completely overlapped on the screen.
In the embodiment, the camera is installed at the front part of the projector, an image projected by a lens of the projector is captured, and then the position of a monochromatic picture on the LCOS chip is adjusted through setting of a calibration algorithm, so that automatic calibration of the image captured by the camera is realized.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. A light combination adjusting method of a three-piece projector is characterized by comprising the following steps:
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three display devices;
then, combining the three monochromatic pictures into a light ray through a light combining structure, and projecting the light ray onto a screen through a lens;
and finally, electronically calibrating the positions of the monochromatic pictures on the display device to ensure that the three monochromatic pictures are projected on the screen in a complete superposition manner.
2. The light combination adjusting method of a three-chip projector according to claim 1, wherein the three-chip projector is a 3LCD projector, and claim 1 specifically includes:
dividing a color picture emitted by a signal source into three single-color pictures with three paths of R, G, B primary colors, and respectively displaying each single-color picture on three liquid crystal screens;
setting a display area of the liquid crystal screen to be larger than a display area of a monochromatic picture;
then combining the three monochromatic pictures through a light combining lens, and projecting the three monochromatic pictures to a screen through a lens;
and finally, carrying out position electronic calibration on the monochromatic pictures on the liquid crystal screen, so that the three monochromatic pictures can be projected on the screen in a completely overlapped manner.
3. The light combination adjustment method for the three-chip projector according to claim 2, wherein the step of calibrating the monochrome picture on the liquid crystal screen specifically comprises:
and taking any one of the three monochromatic pictures as a reference, adjusting the electronic driving scheme, and moving the positions of the other two monochromatic pictures on the liquid crystal screen to enable the positions of the corresponding monochromatic pictures on the screen to be moved, thereby finally realizing that R, G, B monochromatic pictures are completely overlapped on the screen.
4. The light combination adjustment method for the three-chip projector according to claim 3, wherein a camera is installed at the front of the projector to capture the image projected by the lens of the projector, and then the position of the monochrome picture on the liquid crystal screen is adjusted through the setting of the calibration algorithm to automatically calibrate the image captured by the camera.
5. The method for adjusting the light combination of a three-chip projector according to claim 1, wherein the three-chip projector is a 3DLP projector, and claim 1 specifically comprises:
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three DMD chips;
setting the display area of the DMD chip to be larger than the display area of the monochromatic picture;
then, combining the three monochromatic pictures through a light-combining prism, and projecting the three monochromatic pictures onto a screen through a lens;
and finally, performing position electronic calibration on the three monochromatic pictures on the DMD chip to ensure that the three monochromatic pictures can be projected on a screen in a completely overlapped manner.
6. The light combination adjustment method for the three-chip projector according to claim 5, wherein the calibration of the three monochromatic pictures on the DMD chip specifically comprises: and taking any one of the three monochromatic pictures as a reference, adjusting an electronic driving scheme, moving the positions of the other two monochromatic pictures on the DMD chip, correspondingly moving the positions of the monochromatic pictures on the screen, and finally realizing that R, G, B three monochromatic pictures are completely overlapped on the screen.
7. The light combination adjustment method for the three-piece projector according to claim 5, wherein a camera is installed in front of the projector to capture the image projected by the lens of the projector, and then the position of the monochrome picture on the DMD chip is adjusted through the setting of the calibration algorithm to automatically calibrate the image captured by the camera.
8. The light combination adjusting method of the three-chip projector according to claim 1, wherein the three-chip projector is a 3LCOS projector, and claim 1 specifically includes:
dividing a color picture emitted by a signal source into three paths of three monochromatic pictures with R, G, B three primary colors, and respectively displaying each monochromatic picture on three Lcos chips;
setting the LCOS chip display area to be larger than the display area of the monochromatic picture;
then, combining the three monochromatic pictures through a light-combining prism, and projecting the three monochromatic pictures onto a screen through a lens;
and carrying out electronic position calibration on the three monochromatic pictures on the LCOS chip so that the three monochromatic pictures can be projected on a screen in a complete superposition manner.
9. The light combination adjustment method for the three-chip projector according to claim 8, wherein calibrating the three monochromatic pictures on the LCOS chip specifically comprises: and taking any one of the three monochromatic pictures as a reference, adjusting the electronic driving scheme, and moving the positions of the other two monochromatic pictures on the LCOS chip to ensure that the positions of the corresponding monochromatic pictures on the screen are also moved, thereby finally realizing that R, G, B monochromatic pictures are completely overlapped on the screen.
10. The light combination adjustment method for the three-chip projector according to claim 8, wherein a camera is installed at the front of the projector to capture the image projected by the lens of the projector, and then the position of the monochrome picture on the LCOS chip is adjusted by the setting of the calibration algorithm to automatically calibrate the image captured by the camera.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110684128.4A CN113556522A (en) | 2021-06-21 | 2021-06-21 | Light combination adjusting method for three-piece projector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110684128.4A CN113556522A (en) | 2021-06-21 | 2021-06-21 | Light combination adjusting method for three-piece projector |
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| CN113556522A true CN113556522A (en) | 2021-10-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114446192A (en) * | 2022-02-24 | 2022-05-06 | 武汉精立电子技术有限公司 | Method and equipment for attaching micro display |
| CN114464102A (en) * | 2022-02-24 | 2022-05-10 | 武汉精立电子技术有限公司 | Micro display attaching method and device and readable storage medium |
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| FR2843645A1 (en) * | 2003-01-31 | 2004-02-20 | Thomson Licensing Sa | Calibration method for the output signals of the control circuit of a video display unit, determining voltage differences for each video output relative to a reference output and then compensating using a feedback loop |
| US20070097213A1 (en) * | 2003-06-27 | 2007-05-03 | Takeyuki Ajito | Correction data acquisition method and calibration sysytem for image display device |
| CN108376527A (en) * | 2017-02-01 | 2018-08-07 | 精工爱普生株式会社 | Image display device and its control method |
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2021
- 2021-06-21 CN CN202110684128.4A patent/CN113556522A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2843645A1 (en) * | 2003-01-31 | 2004-02-20 | Thomson Licensing Sa | Calibration method for the output signals of the control circuit of a video display unit, determining voltage differences for each video output relative to a reference output and then compensating using a feedback loop |
| US20070097213A1 (en) * | 2003-06-27 | 2007-05-03 | Takeyuki Ajito | Correction data acquisition method and calibration sysytem for image display device |
| CN108376527A (en) * | 2017-02-01 | 2018-08-07 | 精工爱普生株式会社 | Image display device and its control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114446192A (en) * | 2022-02-24 | 2022-05-06 | 武汉精立电子技术有限公司 | Method and equipment for attaching micro display |
| CN114464102A (en) * | 2022-02-24 | 2022-05-10 | 武汉精立电子技术有限公司 | Micro display attaching method and device and readable storage medium |
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