WO2006059480A1 - レーザ光用スクリーン - Google Patents
レーザ光用スクリーン Download PDFInfo
- Publication number
- WO2006059480A1 WO2006059480A1 PCT/JP2005/020948 JP2005020948W WO2006059480A1 WO 2006059480 A1 WO2006059480 A1 WO 2006059480A1 JP 2005020948 W JP2005020948 W JP 2005020948W WO 2006059480 A1 WO2006059480 A1 WO 2006059480A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- laser light
- light
- screen
- blue
- pixel
- Prior art date
Links
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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
Definitions
- the present invention relates to a screen (also referred to as a display device depending on the shape) that displays an image of visible light that is irradiated with laser light emitted by a force such as a laser projector, and particularly relates to improvement of sharpness in the image display. It is.
- a laser projector in order to obtain an image by using a coherent laser beam, has a high energy density, and on the principle of drawing one pixel with a laser beam spot, light per pixel is used. On ordinary screens and walls where power is strong, blurring of light occurs, causing a decrease in contrast and a decrease in sharpness.
- Patent Document 1 a laser projector has been proposed in which a black portion is provided by blocking laser light between pixels in order to display text and images clearly on a screen.
- blue light emitting diodes are commercially available, and caps covering diodes that produce blue light using blue light as a light source and adding a material that converts blue light into red and green are also on the market.
- a diode with this cap it is possible to produce white light with only one type of diode without using the diodes of the three primary colors of light.
- Color LED display is possible with this principle Red and green diodes are cheaper than blue diodes, so color LED displays based on light conversion have been put to practical use. No. 296677 Disclosure of the invention
- the laser projector has a problem that blurring of light occurs on a normal screen or wall and the sharpness is lowered. Further, in the proposal of Patent Document 1, although the sharpness can be improved, the laser beam is mechanically turned on and off with the chitsuba in synchronization with the image signal, so that there is a problem that the control mechanism becomes complicated. is there.
- the present invention has been made under such circumstances, and it is an object of the present invention to provide a laser light screen that can display a clear image without blurring with a simple configuration. Means for solving the problem
- a laser light screen is provided with the following (1) to (1
- a plurality of pixel portions each of which is added with a diffusing material that diffuses light, and is arranged around each pixel portion in the plurality of pixel portions to isolate each pixel portion from each other;
- a screen for laser light is provided.
- the isolation part is a screen for laser light which is a light absorber.
- the isolation part is a screen for laser light which is a light reflector.
- the isolation part is a laser light screen in which a light reflector and a light absorber are sequentially arranged from the pixel part side.
- the pixel unit is a laser light screen which is a sphere.
- each pixel portion is added with a wavelength conversion material that emits a second harmonic when irradiated with infrared laser light together with the additive.
- each pixel portion, together with the diffusing material has blue, blue-violet, or ultraviolet light.
- the pixel unit that emits red, green, and blue light each has a required two-dimensional shape. As arranged in a pattern, each of the pixel portions emits red, green, and blue light, which are the three source colors of light when irradiated with blue, blue-violet, or ultraviolet laser light together with the diffusing material.
- a screen for laser light in which the aperture ratio of each pixel portion is adjusted in consideration of human specific visual sensitivity.
- FIG. 1 is a diagram showing a configuration of Example 1.
- FIG. 2 Diagram showing an example of a circular pixel part
- FIG. 3 is a diagram showing the configuration of Example 2.
- FIG. 1 is an enlarged view of a part of the “laser beam screen” of Example 1, (a) is a plan view thereof, and (b) is a cross section taken along the line A—A.
- FIG. 1 is a laser light screen
- 2 is a pixel unit
- 3 is a light absorption unit that is arranged around the pixel unit 2 and isolates the pixel unit 2 from each other.
- the light absorbing portion 3 is a black plastic plate formed by a mold and having a concave portion 4 as shown in FIG. 1B at a pixel portion forming portion. The same plastic material.
- the pixel portion 2 that is a plastic material including a diffusing material that diffuses light is provided in the concave portion (which may be a through-hole) 4 of the light absorber 3, so that the laser light of this embodiment can be used.
- a screen is obtained. In the case of a through-hole, rear projection is possible.
- a method of providing the pixel portion 2 in the concave portion 4 there is a method in which a liquid plastic material for forming the pixel portion 2 is applied to a plastic plate which is the light absorbing portion 3, and the concave portion 4 is filled and cured.
- An appropriate method can be used such as printing a liquid plastic material forming the pixel portion 2 on the plastic plate as the light absorbing portion 3 by a screen printing method.
- the number of pixels of the screen can be varied without deteriorating the image quality.
- the light absorption part has no recess!
- the pixel portion that may be formed in (1) is formed by screen printing or the like.
- the light absorbing portion may be a metal plate or a metal film. In this case, a black or other light absorbing efficiency is obtained for light absorption.
- the shape of the pixel portion may be circular as shown in FIG.
- the light absorbing portion is a plastic material
- the loss of incident light can be prevented by surrounding each pixel portion with a reflecting material, compared to the case where only the light absorbing material is used.
- the light reflecting material can be made of a metal thin film, and a bright screen can be realized.
- a wavelength conversion material that emits a second harmonic, for example, green may be added to convert the color of the laser beam.
- the pixels are optically blocked, and the laser spot light is confined within the pixel. If the laser spot light is confined in the pixel, the contrast will be greatly improved and the sharpness will be improved.
- a black material is generally used as the light absorbing material. Although it is a desirable material to make black appear, it requires a certain depth and width to absorb light. This is a problem of the aperture ratio, so it must be noted.
- each pixel portion is surrounded by a reflective material. If each pixel portion is surrounded by a reflective material, it is possible to prevent the loss of incident light compared to the case where a light absorbing material is used. Since the light-reflecting material can be composed of a metal thin film, the aperture ratio can be made larger than when a light-absorbing material is used, and a bright screen can be realized in combination with the effect of reducing the loss.
- each pixel is formed of small spheres or particles.
- the light whose refractive index is less than the reflection critical angle is reflected on the surface of the sphere or particle. Since it returns to the inside, the blur incident on other spheres or particles is reduced.
- the three methods can be used alone, or by combining the yarns, A screen can be realized without bleeding.
- the projector is characterized in that the number of pixels and the size of the screen can be changed freely, unlike the display with a fixed number of pixels and screen size (plasma, electroluminescence, liquid crystal, CRT).
- the size can be changed, the number of pixels cannot be changed. It is only a pseudo change and the image quality deteriorates. For example, if a liquid crystal display with 1024 * 738 pixels is set to a resolution of 800 * 600, the number of pixels is not an integer multiple or a fraction of an integer. Easy to check on the display.
- a compact and lightweight projector without using a vacuum on the same principle as a television that irradiates an electron beam onto the surface of a cathode ray tube and emits phosphors on the surface of the cathode ray tube. Can be manufactured. In the present invention, this is realized by changing the screen.
- a screen for rear projection in which an image is viewed on the front surface by irradiating a laser beam from the back surface of the screen is possible, and a screen for front projection is possible by attaching a light reflecting sheet to the back surface of the screen.
- Advertisements can be circulated simply by attaching a detachable rear projection screen to a glass show window in a store. Video can be provided easily when needed without requiring any special refurbishment of glass windows.
- a front projection screen is pasted on a simple wall, an image can be easily projected there.
- the screen for example, silicone rubber is used as a structure, and a diffusing material or a wavelength converting material can be added therein. Of course, it can be used for bumps or curved surfaces.
- FIG. 3 is an enlarged view of a part of the “laser beam screen” according to the second embodiment.
- (A) is an example in which the pixel portion is square, and (b) is the pixel portion.
- (C) is an example of a pattern similar to TV. R (red), G (green), and B (blue) pixel forces As shown, they are arranged in the required 2D pattern.
- the laser beam screen of this example is basically Since it is configured in the same manner as in Example 1, the explanation of Example and its modifications is cited.
- Each of the R, G, and B pixel portions generates white light by adding a material that generates white light upon incidence of blue, blue-violet, and ultraviolet laser light together with a diffusing material. This is achieved by color conversion using red, green, and blue filters. This is the same principle as a color liquid crystal display realized by combining a white backlight, a liquid crystal element, and a color filter.
- each of the R, G, and B pixel portions is realized by a method of generating the three primary colors R, G, and B by adding a material that converts the wavelength of the incident laser light together with the diffusing material. It's okay.
- the red and blue pixel portions are large, and the green pixel portion is small.
- the contrast is remarkably improved and a clear color image without blur can be displayed.
- a wide viewing angle can be obtained by diffusion of light.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004346392A JP4111947B2 (ja) | 2004-11-30 | 2004-11-30 | レーザ光用スクリーンの製造方法 |
JP2004-346392 | 2004-11-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006059480A1 true WO2006059480A1 (ja) | 2006-06-08 |
Family
ID=36564915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/020948 WO2006059480A1 (ja) | 2004-11-30 | 2005-11-15 | レーザ光用スクリーン |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP4111947B2 (ja) |
WO (1) | WO2006059480A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020507121A (ja) * | 2017-01-31 | 2020-03-05 | サン−ゴバン グラス フランス | 指向性拡散反射をもたらす、透明な層でできた積層要素 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1976304A1 (en) * | 2007-03-31 | 2008-10-01 | Sony Deutschland Gmbh | Method for image projection, image projecting apparatus and screen |
CN101950122B (zh) * | 2007-05-17 | 2012-01-04 | Prysm公司 | 用于扫描光束显示系统的具有发光带的多层屏幕 |
JP2009288741A (ja) * | 2008-06-02 | 2009-12-10 | Mitsubishi Electric Corp | 画像表示装置 |
Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02199975A (ja) * | 1989-01-27 | 1990-08-08 | Sony Corp | ディスプレイ装置 |
JPH03113484A (ja) * | 1989-09-28 | 1991-05-14 | Toshiba Lighting & Technol Corp | ディスプレイデバイス |
JPH04315138A (ja) * | 1991-04-15 | 1992-11-06 | Nippon Telegr & Teleph Corp <Ntt> | 自己発光スクリーンおよびこの自己発光スクリーンを用いた像情報の表示方法 |
JPH04323686A (ja) * | 1991-04-23 | 1992-11-12 | Clarion Co Ltd | ディスプレイ装置 |
JPH05165414A (ja) * | 1991-12-17 | 1993-07-02 | Ricoh Co Ltd | 大画面ディスプレイおよび画像表示方法 |
JPH05325839A (ja) * | 1992-05-25 | 1993-12-10 | Tadahiro Ishikawa | 電気表示器の無反射スクリーン |
JPH10206972A (ja) * | 1997-01-28 | 1998-08-07 | Mitsubishi Materials Corp | 蛍光スクリーン及びこれを用いた表示装置 |
JPH1138901A (ja) * | 1997-07-23 | 1999-02-12 | Toshiba Corp | 表示装置 |
JP2000260331A (ja) * | 1999-03-10 | 2000-09-22 | Nec Corp | プラズマディスプレイ装置 |
WO2003085627A2 (en) * | 2002-04-01 | 2003-10-16 | Sony Electronics Inc. | Color separator for emissive display |
JP2003315921A (ja) * | 2002-04-22 | 2003-11-06 | Fusao Terada | 電磁波投射による発光画像システム |
JP2003331783A (ja) * | 2002-05-15 | 2003-11-21 | Nippon Hoso Kyokai <Nhk> | 紫外光源及び自発光型表示装置 |
-
2004
- 2004-11-30 JP JP2004346392A patent/JP4111947B2/ja not_active Expired - Fee Related
-
2005
- 2005-11-15 WO PCT/JP2005/020948 patent/WO2006059480A1/ja active Application Filing
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02199975A (ja) * | 1989-01-27 | 1990-08-08 | Sony Corp | ディスプレイ装置 |
JPH03113484A (ja) * | 1989-09-28 | 1991-05-14 | Toshiba Lighting & Technol Corp | ディスプレイデバイス |
JPH04315138A (ja) * | 1991-04-15 | 1992-11-06 | Nippon Telegr & Teleph Corp <Ntt> | 自己発光スクリーンおよびこの自己発光スクリーンを用いた像情報の表示方法 |
JPH04323686A (ja) * | 1991-04-23 | 1992-11-12 | Clarion Co Ltd | ディスプレイ装置 |
JPH05165414A (ja) * | 1991-12-17 | 1993-07-02 | Ricoh Co Ltd | 大画面ディスプレイおよび画像表示方法 |
JPH05325839A (ja) * | 1992-05-25 | 1993-12-10 | Tadahiro Ishikawa | 電気表示器の無反射スクリーン |
JPH10206972A (ja) * | 1997-01-28 | 1998-08-07 | Mitsubishi Materials Corp | 蛍光スクリーン及びこれを用いた表示装置 |
JPH1138901A (ja) * | 1997-07-23 | 1999-02-12 | Toshiba Corp | 表示装置 |
JP2000260331A (ja) * | 1999-03-10 | 2000-09-22 | Nec Corp | プラズマディスプレイ装置 |
WO2003085627A2 (en) * | 2002-04-01 | 2003-10-16 | Sony Electronics Inc. | Color separator for emissive display |
JP2003315921A (ja) * | 2002-04-22 | 2003-11-06 | Fusao Terada | 電磁波投射による発光画像システム |
JP2003331783A (ja) * | 2002-05-15 | 2003-11-21 | Nippon Hoso Kyokai <Nhk> | 紫外光源及び自発光型表示装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020507121A (ja) * | 2017-01-31 | 2020-03-05 | サン−ゴバン グラス フランス | 指向性拡散反射をもたらす、透明な層でできた積層要素 |
JP7163295B2 (ja) | 2017-01-31 | 2022-10-31 | サン-ゴバン グラス フランス | 指向性拡散反射をもたらす、透明な層でできた積層要素 |
Also Published As
Publication number | Publication date |
---|---|
JP4111947B2 (ja) | 2008-07-02 |
JP2006154443A (ja) | 2006-06-15 |
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