CN114185234A - High color gamut coverage 3LCD projection device - Google Patents

High color gamut coverage 3LCD projection device Download PDF

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Publication number
CN114185234A
CN114185234A CN202111491411.1A CN202111491411A CN114185234A CN 114185234 A CN114185234 A CN 114185234A CN 202111491411 A CN202111491411 A CN 202111491411A CN 114185234 A CN114185234 A CN 114185234A
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CN
China
Prior art keywords
light
lcd screen
lens
red
spectroscope
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Pending
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CN202111491411.1A
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Chinese (zh)
Inventor
朱县雄
范春荣
曾令丰
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Shenzhen Kejinming Electronic Co Ltd
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Shenzhen Kejinming Electronic Co Ltd
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Priority to CN202111491411.1A priority Critical patent/CN114185234A/en
Publication of CN114185234A publication Critical patent/CN114185234A/en
Pending legal-status Critical Current

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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
    • G03B21/005—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
    • 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
    • G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
    • G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2073—Polarisers in the lamp house
    • 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
    • G03B21/208—Homogenising, shaping of the illumination light
    • 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
    • H04N9/3114—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 by using a sequential colour filter producing one colour at a time
    • 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
    • H04N9/3152—Modulator illumination systems for shaping the light beam
    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Liquid Crystal (AREA)

Abstract

The invention relates to a 3LCD projection device with high color gamut coverage rate.A white light emitted by a light source is subjected to light homogenizing and P/S conversion and then is condensed by a condenser lens; the first spectroscope reflects the blue light therein, then the blue light passes through the reflector, the condenser and the polarizing plate and reaches the first LCD screen, and light with other wavelengths is transmitted; the second spectroscope reflects the green light therein, the green light passes through the condenser lens and the polarizing plate and then reaches the second LCD screen, and light with other wavelengths is transmitted; the transmitted light with other wavelengths passes through a relay lens, a reflector, a red-yellow color wheel, a red condenser and a polarizing plate and then irradiates a third LCD screen. And finally, combining the light and imaging on a screen through a projection lens. Compared with the existing 3LCD projector, the invention has the advantages that the central wavelength of the green part is reduced, the green color is better, and in addition, the yellow part is added, so that the integral color gamut coverage rate is obviously improved.

Description

High color gamut coverage 3LCD projection device
Technical Field
The invention relates to the technical field of projectors, in particular to a high-color-gamut-coverage-rate 3LCD (liquid crystal display) projection device.
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 3LCD projector is a mainstream product. The product realizes the display of images by utilizing the principle of three primary colors of red, green and blue, and in order to achieve higher brightness in use, the 3LCD projector has the defect of larger wavelength width of a green part, thereby causing the problems of yellow green and reduced color gamut coverage.
The present invention is directed to solving the above problems.
Disclosure of Invention
In order to solve the technical problems of yellow green and low color gamut coverage rate in the prior art, the invention provides a 3LCD projector, which can improve the color gamut coverage rate of the prior 3LCD projector.
In order to achieve the above purpose, the 3LCD projection device of the present invention adopts the following technical solution:
a high color gamut coverage 3LCD projection device comprising: the device comprises a light source, a lens, a polarizing beam splitter, a condenser, a spectroscope, a reflector, a polarizing plate, an LCD screen, a relay lens, a red-yellow color wheel, a light-combining prism and a projection lens; after light is emitted from a light source, a main light path is formed along a lens, a polarization beam splitter and a condenser lens, then the main light path is divided into three branch light paths by a beam splitter, and finally the three branch light paths are synthesized by a light-combining prism; wherein: the lens adopts a fly-eye lens for light equalization; a Polarization Beam Splitter (PBS) for P/S light conversion; the spectroscope comprises a first spectroscope and a second spectroscope; the LCD screen comprises a first LCD screen, a second LCD screen and a third LCD screen; the light source is any one of a mercury lamp and an LED light source.
White light emitted by the light source is subjected to P/S light conversion by a fly-eye lens and a PBS (Polarizing Beam Splitter), and then is condensed by a condenser lens. Then the first spectroscope reflects the blue light therein, and reaches the first LCD screen after passing through the reflector, the condenser (blue-green) and the polarizer, and the light with other wavelengths is transmitted; the second spectroscope reflects the green light in the second spectroscope, the light splitting film on the spectroscope can change the central wavelength of the reflected green light, the reflected light reaches the second LCD screen after passing through a condenser (blue-green) and a polarizing plate, and the light with other wavelengths is transmitted; and the transmitted light with other wavelengths passes through the relay lens A, the reflecting mirror, the relay lens B, the red-yellow color wheel, the reflecting mirror, the red condenser and the polarizing plate and then irradiates to a third LCD screen.
The first LCD screen processes the blue image; the second LCD screen processes the green image; the third LCD screen processes red and yellow images, and the conversion period of the red and yellow images is the same as the rotation period of the red and yellow color wheel. And finally, combining the images of the three LCD screens through a light combining prism, and imaging the images on the screen through a projection lens.
Compared with the existing 3LCD projector, the technical scheme of the invention has the advantages that the central wavelength of the green part is reduced from about 560nm to about 540nm, the green color is better, and in addition, the yellow part of about 580nm is added, so that the integral color gamut coverage rate is obviously improved.
Drawings
FIG. 1 is a schematic view of a projection apparatus according to the present invention
Reference is made to the accompanying drawings in which:
1. light source, 2, fly-eye lens (incident), 3, fly-eye lens (emergent), 4, Polarizing Beam Splitter (PBS), 5, condenser, 6, first spectroscope (blue), 7, second spectroscope (green), 8, relay lens A, 9, reflector (red), 10, reflector (blue), 11, condenser (blue-green), 12, polarizing plate (green), 13, LCD screen, 14, polarizing plate (blue), 15, relay lens B, 16, red-yellow color wheel, 17, condenser (red), 18, polarizing plate (red), 19, light-combining prism, 20, projection lens.
Detailed Description
In order to better understand the purpose and structure of the present invention, the high color gamut coverage 3LCD projection device of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
the projection apparatus in this embodiment includes: the device comprises a light source, a lens, a polarizing beam splitter, a condenser, a spectroscope, a reflector, a polarizing plate, an LCD screen, a relay lens, a red-yellow color wheel, a light-combining prism and a projection lens; after light is emitted from a light source, a main light path is formed along a lens, a polarization beam splitter and a condenser lens, then the main light path is divided into three branch light paths by a beam splitter, and finally the three branch light paths are synthesized by a light-combining prism; wherein: the lenses adopt fly-eye lenses (2 and 3) for light equalization; a Polarization Beam Splitter (PBS) (4) for P/S light conversion; the spectroscope comprises a first spectroscope (6) and a second spectroscope (7); the LCD screen (13) includes a first LCD screen, a second LCD screen, and a third LCD screen. The light source (1) in the embodiment adopts an LED light source.
White light emitted by the light source (1) is subjected to P/S light conversion by the fly-eye lenses (2 and 3) and the polarization beam splitter (4), and then is condensed by the condenser lens (5). Then the blue light in the first spectroscope (6) is reflected, passes through a reflector (10), a condenser (blue-green) (11) and a polarizing plate (14) and reaches a first LCD screen (13), and light with other wavelengths is transmitted; the second spectroscope (7) reflects the green light in the green light, the light splitting film on the spectroscope can change the central wavelength of the reflected green light, the reflected light reaches the second LCD screen (13) after passing through a condenser (blue-green) (11) and a polarizing plate (12), and the light with other wavelengths is transmitted; the transmitted light with other wavelengths passes through a relay lens A (8), a reflector (9), a relay lens B (15), a red-yellow color wheel (16), the reflector (9), a condenser (red) (17) and a polarizing plate (18) and then irradiates a third LCD screen (13). In this embodiment, the relay lens a is different from the relay lens B, and the mirror behind the relay lens a is the same as the mirror behind the red-yellow color wheel.
The first LCD screen processes the blue image; the second LCD screen processes the green image; the third LCD screen processes red and yellow images, and the conversion period of the red and yellow images is the same as the rotation period of the red and yellow color wheel. Finally, the images of the three LCD screens are combined through a light combination prism (19) and imaged on the screen through a projection lens (20).
Example 2:
the projection apparatus in this embodiment includes: the device comprises a light source, a lens, a polarizing beam splitter, a condenser, a spectroscope, a reflector, a polarizing plate, an LCD screen, a relay lens, a red-yellow color wheel, a light-combining prism and a projection lens; after light is emitted from a light source, a main light path is formed along a lens, a polarization beam splitter and a condenser lens, then the main light path is divided into three branch light paths by a beam splitter, and finally the three branch light paths are synthesized by a light-combining prism; wherein: the lenses adopt fly-eye lenses (2 and 3) for light equalization; a Polarization Beam Splitter (PBS) (4) for P/S light conversion; the spectroscope comprises a first spectroscope (6) and a second spectroscope (7); the LCD screen (13) includes a first LCD screen, a second LCD screen, and a third LCD screen. The light source (1) in the present embodiment is a mercury lamp.
White light emitted by the light source (1) is subjected to P/S light conversion by the fly-eye lenses (2 and 3) and the polarization beam splitter (4), and then is condensed by the condenser lens (5). Then the blue light in the first spectroscope (6) is reflected, passes through a reflector (10), a condenser (blue-green) (11) and a polarizing plate (14) and reaches a first LCD screen (13), and light with other wavelengths is transmitted; the second spectroscope (7) reflects the green light in the green light, the light splitting film on the spectroscope can change the central wavelength of the reflected green light, the reflected light reaches the second LCD screen (13) after passing through a condenser (blue-green) (11) and a polarizing plate (12), and the light with other wavelengths is transmitted; the transmitted light with other wavelengths passes through a relay lens A (8), a reflector (9), a relay lens B (15), a red-yellow color wheel (16), the reflector (9), a condenser (red) (17) and a polarizing plate (18) and then irradiates a third LCD screen (13). In this embodiment, the relay lens a is different from the relay lens B, and the mirror behind the relay lens a is the same as the mirror behind the red-yellow color wheel.
The first LCD screen processes the blue image; the second LCD screen processes the green image; the third LCD screen processes red and yellow images, and the conversion period of the red and yellow images is the same as the rotation period of the red and yellow color wheel. Finally, the images of the three LCD screens are combined through a light combination prism (19) and imaged on the screen through a projection lens (20).
In the two embodiments, the central wavelength of the green part is reduced from about 560nm to about 540nm, the green color is better, and the yellow part of about 580nm is added, so that the overall color gamut coverage rate is obviously 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 (3)

1. A high color gamut coverage 3LCD projection device, comprising: the device comprises a light source, a lens, a polarizing beam splitter, a condenser, a spectroscope, a reflector, a polarizing plate, an LCD screen, a relay lens, a red-yellow color wheel, a light-combining prism and a projection lens; the method is characterized in that: after light is emitted from a light source, a main light path is formed along a lens, a polarization beam splitter and a condenser lens, then the main light path is divided into three branch light paths by a beam splitter, and finally the three branch light paths are synthesized by a light-combining prism; the lens is a fly-eye lens and is used for homogenizing light; the polarization beam splitter is used for P/S light conversion; the spectroscope comprises a first spectroscope and a second spectroscope; the LCD screen comprises a first LCD screen, a second LCD screen and a third LCD screen; the first spectroscope reflects the blue light, then the blue light passes through the reflector, the condenser and the polarizing plate and reaches the first LCD screen, and light with other wavelengths is transmitted and passed; the second spectroscope reflects the green light, the light splitting film on the spectroscope can change the central wavelength of the reflected green light, the reflected light reaches the second LCD screen after passing through the condenser lens and the polarizing plate, and the light with other wavelengths is transmitted; and the transmitted light with other wavelengths passes through the relay lens A, the reflecting mirror, the relay lens B, the red-yellow color wheel, the reflecting mirror, the red condenser and the polarizing plate and then irradiates to a third LCD screen.
2. A projection device according to claim 1, wherein: the first LCD screen processes blue images, and the second LCD screen processes green images; the third LCD screen processes red and yellow images, and the conversion period of the red and yellow images is the same as the rotation period of the red and yellow color wheel.
3. A projection device according to claim 1, wherein: the light source is any one of a mercury lamp and an LED.
CN202111491411.1A 2021-12-08 2021-12-08 High color gamut coverage 3LCD projection device Pending CN114185234A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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
CN115220324A (en) * 2022-08-04 2022-10-21 业成科技（成都）有限公司 Image forming apparatus and vehicle
CN115373199A (en) * 2022-07-08 2022-11-22 深圳市科金明电子股份有限公司 Adjustable reflective ultrashort burnt 2LCD projector

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CN110471246A (en) * 2018-05-10 2019-11-19 深圳光峰科技股份有限公司 Ray machine regulating system and method
CN111722463A (en) * 2019-03-20 2020-09-29 青岛海信激光显示股份有限公司 Laser projection device
CN112992025A (en) * 2021-02-23 2021-06-18 南通大学 Four-primary-color wide-color-gamut AR glasses and color management method thereof
CN213715678U (en) * 2020-11-16 2021-07-16 深圳彩翼光电科技有限公司 Novel 3LCD projector laser lighting system and 3LCD projector

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JP2002341346A (en) * 2001-05-18 2002-11-27 Fujitsu General Ltd Liquid crystal projector device
CN1717715A (en) * 2002-07-24 2006-01-04 吉诺彩色技术有限公司 High brightness wide gamut display
CN2621303Y (en) * 2003-06-18 2004-06-23 北京电影机械研究所 Optical engine for liquid crystal projector
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115373199A (en) * 2022-07-08 2022-11-22 深圳市科金明电子股份有限公司 Adjustable reflective ultrashort burnt 2LCD projector
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
CN115145097B (en) * 2022-07-20 2024-01-16 深圳市科金明电子股份有限公司 Two-piece type 3D projection system and imaging method thereof
CN115220324A (en) * 2022-08-04 2022-10-21 业成科技（成都）有限公司 Image forming apparatus and vehicle
CN115220324B (en) * 2022-08-04 2023-11-14 业成科技（成都）有限公司 Imaging device and vehicle

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