CN114185235A - High color gamut coverage 2LCD projection device - Google Patents
High color gamut coverage 2LCD projection deviceDownload PDFInfo
- Publication number
- CN114185235A CN114185235ACN202111491643.7ACN202111491643ACN114185235ACN 114185235 ACN114185235 ACN 114185235ACN 202111491643 ACN202111491643 ACN 202111491643ACN 114185235 ACN114185235 ACN 114185235A
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- light
- lcd module
- light beam
- lens
- lcd
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- QSHDDOUJBYECFT-UHFFFAOYSA-NmercuryChemical compound[Hg]QSHDDOUJBYECFT-UHFFFAOYSA-N0.000claimsdescription2
- 229910052753mercuryInorganic materials0.000claimsdescription2
- 239000003086colorantSubstances0.000description4
- 230000004075alterationEffects0.000description3
- 239000004973liquid crystal related substanceSubstances0.000description3
- 239000000463materialSubstances0.000description1
- 238000012986modificationMethods0.000description1
- 230000004048modificationEffects0.000description1
- 238000006467substitution reactionMethods0.000description1
- 230000000007visual effectEffects0.000description1
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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
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
- 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
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
- 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
- G03B21/206—Control of light source other than position or intensity
- 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]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
- 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
- H04N9/315—Modulator illumination systems
- H04N9/3158—Modulator illumination systems for controlling the spectrum
- 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
- H04N9/315—Modulator illumination systems
- H04N9/3164—Modulator illumination systems using multiple light sources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
Description
Technical Field
The invention relates to the technical field of projectors, in particular to a 2LCD (liquid crystal display) projection device with high color gamut coverage rate.
Background
A projector is a device that can project an image or video onto a curtain or a screen, and at present, projectors are classified into three types: DLP (digital light processing) projectors, single LCD (liquid crystal display) projectors, 3LCD (liquid crystal display) projectors. Wherein: the color gamut coverage of DLP (digital light processing) projectors is high, and the color gamut coverage of 3LCD projectors and single LCD projectors is low; especially for single LCD projectors, the color gamut coverage is low, resulting in poor color saturation and poor visual effect. Therefore, it is urgent to provide a projection apparatus with high color gamut coverage.
The present invention is directed to solving the above problems.
Disclosure of Invention
In order to solve the problem of low color gamut coverage rate of the existing 3LCD projector and single LCD projector, the invention provides a 2LCD projection device with high color gamut coverage rate, which can improve the color gamut coverage rate.
In order to achieve the purpose, the invention adopts the technical scheme that:
the high-color gamut coverage 2LCD projection device comprises a light source, a lens, an LCD module, a light combining lens, a field lens and a projection lens, wherein light rays form a light path along the lens, the LCD module, the light combining lens, the field lens and the projection lens after being emitted from the light source. The light sources are two groups, the first group of light sources emits a first light beam and a second light beam, the second group of light sources emits a third light beam and a fourth light beam, and the two groups of light sources adopt any same type of mercury lamp, LED and LD laser light sources.
The lens adopts an aspheric lens, and can correct the spherical aberration of the spherical lens in the collimation and focusing system in the prior art.
The LCD module adopts two black-white transmission type LCD modules which are respectively a first LCD module and a second LCD module; the two LCD modules have the same structure and comprise a Fresnel lens, an incident polarizing plate, an LCD screen and an emergent polarizing plate. The light emitted by the light source is divergent light, the light is changed into parallel light after passing through the Fresnel lens, the parallel light is changed into polarized light in a single direction after passing through the incident polarizing plate, the polarized light reaches the emergent polarizing plate after passing through the LCD screen, the emergent polarizing plate can filter the light in different vibration directions, the light intensity of each point is changed to form a pattern, and the pattern reaches the light combining lens to form a light path.
The first LCD module displays images of two different color fields of an input video signal alternately, the first light beam and the second light beam illuminate alternately, and the alternate lighting-up and lighting-down periods of the first light beam and the second light beam are synchronous with the alternate periods of the two different color fields of the first LCD module. The second LCD module displays other two different color field images of the input video signal alternately, the third light beam and the fourth light beam illuminate alternately, and the alternate lighting-up and lighting-down periods of the third light beam and the fourth light beam are synchronous with the alternate periods of the two different color fields of the second LCD module.
The wavelength of the first light is 625-645 nm, the wavelength of the second light is 445-485 nm, the wavelength of the third light is 525-555 nm, and the wavelength of the fourth light is 565-585 nm.
The light combining mirror is a dichroic mirror, light with a wavelength of 490-590 nm can penetrate through the light combining mirror, and light with other wavelengths is reflected by the light combining mirror.
The light rays passing through the first LCD module and the second LCD module are combined by the light combining lens, and the image is imaged on a screen after passing through the field lens and the projection lens.
The light of the existing projector adopts three colors, and the projection device of the invention adopts four colors of light, thereby improving the color gamut coverage rate of the projection device.
Compared with the prior art, the projection mode of the aspheric lens and the 2LCD modules solves the technical problem of low color gamut coverage rate of the existing 3LCD projector and single LCD projector, and can realize rich-color image quality on a screen.
Drawings
FIG. 1 is a schematic view of a projection apparatus according to the present invention
FIG. 2 is a schematic view of an LCD module of a projection apparatus
Reference is made to the accompanying drawings in which:
1. the light source comprises a first light beam, a second light beam, a 3 aspheric lens, a 4 first LCD module, a 5 third light beam, a 6 fourth light beam, a 7 aspheric lens, a 8 second LCD module, a 9 light combiner, a 10 field lens, a 11 projection lens, a 41 Fresnel lens, a 42 incident polarizer, a 43 LCD screen, a 44 emergent polarizer.
Detailed Description
In order to better understand the purpose and structure of the present invention, a high color gamut coverage 2LCD projection device of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
the projection device in this embodiment includes a light source, a lens, an LCD module, a light combiner, a field lens, and a projection lens, and light emitted from the light source forms a light path along the lens, the LCD module, the light combiner, the field lens, and the projection lens. The light sources are two groups, the first group of light sources emit a first light beam (1) and a second light beam (2), the second group of light sources emit a third light beam (5) and a fourth light beam (6), and the two groups of light sources adopt LED light sources.
The lenses are aspheric lenses (3, 7), and spherical aberration of the spherical lens in the collimation and focusing system in the prior art can be corrected.
The LCD module adopts two black-white transmission type LCD modules which are respectively a first LCD module (4) and a second LCD module (8); the two LCD modules are identical in structure and comprise a Fresnel lens (41), an incident polarizing plate (42), an LCD screen (43) and an emergent polarizing plate (44). The light emitted by the light source is divergent light, the light is changed into parallel light after passing through the Fresnel lens (41), the parallel light is changed into polarized light in a single direction after passing through the incident polarizing plate (42), the polarized light is turned through the LCD screen (43) and then reaches the emergent polarizing plate (44), the emergent polarizing plate (44) can filter the light in different vibration directions, the light intensity of each point is changed to form a pattern, and the pattern reaches the light combining lens to form a light path.
The first LCD module (4) alternately displays two different color field images of an input video signal, the first light beam (1) and the second light beam (2) alternately illuminate, and the alternate lighting-up and lighting-off periods of the first light beam (1) and the second light beam (2) are synchronous with the alternate periods of the two different color fields of the first LCD module (4). The second LCD module (8) displays other two different color field images of the input video signal alternately, the third light beam (5) and the fourth light beam (6) illuminate alternately, and the alternate lighting-up and lighting-down periods of the third light beam (5) and the fourth light beam (6) are synchronous with the alternate periods of the two different color fields of the second LCD module (8).
The wavelength of the first light beam (1) is 625-645 nm, the wavelength of the second light beam (2) is 445-485 nm, the wavelength of the third light beam (5) is 525-555 nm, and the wavelength of the fourth light beam (6) is 565-585 nm.
The light-combining mirror (9) is a dichroic mirror, light with the wavelength of 490-590 nm can penetrate through the light-combining mirror, and light with other wavelengths is reflected by the light-combining mirror.
The light rays passing through the first LCD module (4) and the second LCD module (8) are combined by the light combining lens (9), and the images are imaged on a screen after passing through the field lens (10) and the projection lens (11).
The projection device of the embodiment adopts four colors of light rays, so that the color gamut coverage rate of the projection device is improved.
Example 2:
the projection device in this embodiment includes a light source, a lens, an LCD module, a light combiner, a field lens, and a projection lens, and light emitted from the light source forms a light path along the lens, the LCD module, the light combiner, the field lens, and the projection lens. The light sources are two groups, the first group of light sources emit a first light beam (1) and a second light beam (2), the second group of light sources emit a third light beam (5) and a fourth light beam (6), and the two groups of light sources adopt LD laser light sources.
The lenses are aspheric lenses (3, 7), and spherical aberration of the spherical lens in the collimation and focusing system in the prior art can be corrected.
The LCD module adopts two black-white transmission type LCD modules which are respectively a first LCD module (4) and a second LCD module (8); the two LCD modules are identical in structure and comprise a Fresnel lens (41), an incident polarizing plate (42), an LCD screen (43) and an emergent polarizing plate (44). The light emitted by the light source is divergent light, the light is changed into parallel light after passing through the Fresnel lens (41), the parallel light is changed into polarized light in a single direction after passing through the incident polarizing plate (42), the polarized light is turned through the LCD screen (43) and then reaches the emergent polarizing plate (44), the emergent polarizing plate (44) can filter the light in different vibration directions, the light intensity of each point is changed to form a pattern, and the pattern reaches the light combining lens to form a light path.
The first LCD module (4) alternately displays two different color field images of an input video signal, the first light beam (1) and the second light beam (2) alternately illuminate, and the alternate lighting-up and lighting-off periods of the first light beam (1) and the second light beam (2) are synchronous with the alternate periods of the two different color fields of the first LCD module (4). The second LCD module (8) displays other two different color field images of the input video signal alternately, the third light beam (5) and the fourth light beam (6) illuminate alternately, and the alternate lighting-up and lighting-down periods of the third light beam (5) and the fourth light beam (6) are synchronous with the alternate periods of the two different color fields of the second LCD module (8).
The wavelength of the first light beam (1) is 625-645 nm, the wavelength of the second light beam (2) is 445-485 nm, the wavelength of the third light beam (5) is 525-555 nm, and the wavelength of the fourth light beam (6) is 565-585 nm.
The light-combining mirror (9) is a dichroic mirror, light with the wavelength of 490-590 nm can penetrate through the light-combining mirror, and light with other wavelengths is reflected by the light-combining mirror.
The light rays passing through the first LCD module (4) and the second LCD module (8) are combined by the light combining lens (9), and the images are imaged on a screen after passing through the field lens (10) and the projection lens (11).
The projection device of the embodiment adopts four colors of light rays, so that the color gamut coverage rate of the projection device is improved.
It is understood that the present invention has been described with reference to certain embodiments. Various changes or equivalent substitutions may be made on these features and embodiments by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A high color gamut coverage 2LCD projection device comprising: light source, lens, LCD module, closed light mirror, field lens, projection lens, its characterized in that: after light is emitted from the light source, a light path is formed along the lenses (3, 7), the LCD module, the light combining lens (9), the field lens (10) and the projection lens (11); the light sources are two groups, the first group of light sources emits a first light beam (1) and a second light beam (2), and the second group of light sources emits a third light beam (5) and a fourth light beam (6); the LCD module is a black-white transmission type LCD module and comprises a first LCD module (4) and a second LCD module (8), wherein the first LCD module (4) alternately displays two different color field images of an input video signal, a first light beam (1) and a second light beam (2) alternately illuminate, and the alternate lighting-up and lighting-down periods of the first light beam (1) and the second light beam (2) are synchronous with the alternate periods of the two different color fields of the first LCD module (4); the second LCD module (8) displays other two different color field images of the input video signal alternately, the third light beam (5) and the fourth light beam (6) illuminate alternately, and the alternate lighting-up and lighting-down periods of the third light beam (5) and the fourth light beam (6) are synchronous with the alternate periods of the two different color fields of the second LCD module (8).
2. A projection device according to claim 1, wherein: the LCD module comprises a Fresnel lens, an incident polarizing plate, an LCD screen and an emergent polarizing plate; the light emitted by the light source is changed into parallel light after passing through the Fresnel lens, the parallel light is changed into polarized light in a single direction after passing through the incident polarizing plate, the polarized light reaches the emergent polarizing plate after passing through the LCD screen, the emergent polarizing plate filters the light in different vibration directions, the light intensity of each point is changed to form a pattern, and the pattern reaches the light combining lens to form a light path.
3. The projection device of any of claims 1-2, wherein: the wavelength of the first beam of light (1) is 625-645 nm, the wavelength of the second beam of light (2) is 445-485 nm, the wavelength of the third beam of light (5) is 525-555 nm, and the wavelength of the fourth beam of light (6) is 565-585 nm.
4. A projection device according to claim 1, wherein: the light combining mirror is a dichroscope, light with the wavelength of 490-590 nm can penetrate through the light combining mirror, and light with other wavelengths is reflected by the light combining mirror.
5. A projection device according to claim 1, wherein: the two groups of light sources are any same type of mercury lamp, LED and LD laser light sources.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111491643.7ACN114185235A (en) | 2021-12-08 | 2021-12-08 | High color gamut coverage 2LCD projection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111491643.7ACN114185235A (en) | 2021-12-08 | 2021-12-08 | High color gamut coverage 2LCD projection device |
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| CN114185235Atrue CN114185235A (en) | 2022-03-15 |
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| CN202111491643.7APendingCN114185235A (en) | 2021-12-08 | 2021-12-08 | High color gamut coverage 2LCD projection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115145097A (en)* | 2022-07-20 | 2022-10-04 | 深圳市科金明电子股份有限公司 | Two-piece type 3D projection system and imaging method thereof |
| CN116841106A (en)* | 2023-06-12 | 2023-10-03 | 深圳市科金明电子股份有限公司 | Two-piece LCD projection device with light filtering function and projection method |
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