WO2006123727A1 - Ecran de projection utilisant un element de deviation et systeme d’affichage par projection - Google Patents

Ecran de projection utilisant un element de deviation et systeme d’affichage par projection Download PDF

Info

Publication number
WO2006123727A1
WO2006123727A1 PCT/JP2006/309899 JP2006309899W WO2006123727A1 WO 2006123727 A1 WO2006123727 A1 WO 2006123727A1 JP 2006309899 W JP2006309899 W JP 2006309899W WO 2006123727 A1 WO2006123727 A1 WO 2006123727A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
incident
deflecting element
projector
angle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2006/309899
Other languages
English (en)
Japanese (ja)
Inventor
Tatsuo Uchida
Baku Katagiri
Toru Kawakami
Yuhei Kuratomi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOHOKU TECHNO-BRAINS Corp
Tohoku Techno Brains Corp
Original Assignee
TOHOKU TECHNO-BRAINS Corp
Tohoku Techno Brains Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TOHOKU TECHNO-BRAINS Corp, Tohoku Techno Brains Corp filed Critical TOHOKU TECHNO-BRAINS Corp
Publication of WO2006123727A1 publication Critical patent/WO2006123727A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G03B21/62—Translucent screens

Definitions

  • the present invention relates to a projection display screen and a projection display system, and more particularly to a projection display screen and a projection using a deflection element that provide a display image with a high quality and a high contrast ratio. ⁇ It relates to the cushion display system.
  • the present inventors have realized a high quality display image by using a screen having a diffusion film force instead of a screen having a lenticular lens force used in a conventional projection display (for example, Patent Document 1). reference). Also, a thin rear projection display providing high image quality was realized by matching the allowable incidence angle area of the screen with the emission angle area of the projector light from the deflecting element (Patent Document 2).
  • Patent Document 1 PCT / JP03 / 13050
  • Patent Document 2 Japanese Patent Application No. 2004-190318
  • the inventors of the present invention have determined that it is essential to improve the photopic contrast ratio in order to achieve higher quality, and in order to realize this, diffuse reflection of external light to the viewer side is performed. The challenge was to control it. It is an object of the present invention to provide a projection display screen and a projection display system using a deflecting element, embodying a high-quality thin rear projection display that can solve this problem.
  • a deflecting element that deflects incident light from a projector light incident angle region and emits the deflected light to a deflecting element exit angle region and a deflecting element exit surface region according to the projector light incident angle region, and A black matrix having a transmission surface area aligned with the deflection element exit surface area and an allowable incident angle area matched with the deflection element exit angle area are diffused to diffuse the incident light from the deflection element exit angle area.
  • the deflection element is a prism array in which either one or both of the upper surface and the lower surface of the prism are formed by joining a plurality of planes. Screen described.
  • the diffusion film includes a layered or linear structure having different refractive indexes, and emits incident light from a specific incident allowable angle region to a specific diffusion angle region.
  • FIG. 1 is a schematic sectional view showing an example of a basic form of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing an example of an embodiment of the present invention in which a BM and a light absorbing member are disposed together It is.
  • FIG. 3 is a schematic cross-sectional view showing an example of an embodiment of the present invention in which a prism surface is composed of a plurality of planes.
  • FIG. 4 is a schematic cross-sectional view showing an example of an embodiment of the present invention in which prisms are spaced apart from each other.
  • FIG. 5 is a schematic sectional view showing an example of an embodiment of the present invention using a deflecting element having a light condensing function.
  • FIG. 6 is a schematic cross-sectional view showing an example of an embodiment of the present invention in which the thickness of BM is relatively thick.
  • the basic form of the present invention is, for example, as shown in FIG. 1, a deflecting element 1 that changes the traveling direction of projector light 4, a BM (meaning black matrix; the same applies hereinafter) 2 that absorbs external light, and A diffusion film 3 for diffusing the projector light 4 is laminated in this order.
  • the deflecting element 1 is an optical element having an optical characteristic that deflects incident light having a projector light incident angle region force and outputs the deflected light to a deflecting element exit angle region and a deflecting element exit surface region corresponding to the projector light incident angle region.
  • it consists of a prism array 1.
  • Deflection element 1 and BM2 that should avoid the projector light 4 being absorbed in BM2 are aligned with the transmission surface area 2A of deflection element exit surface area force 3 ⁇ 4M2, and the deflection element exit surface area is BM2. Designed to be included in transparent area 2A.
  • the deflection element 1 and the diffusion film 3 that slide so that all the projector light 4 is diffused to the observation angle region have a deflection element exit angle region. It is designed so that the area is aligned with the allowable incident angle area of the diffusing film 3 and the exit angle area of the deflecting element is included in the allowable incident angle area of the diffusing film 3.
  • the projector light 4 is not absorbed by the BM 2 and is diffused in the observation angle region, so that high projector light utilization efficiency can be realized.
  • the external light 5 is incident on the screen from the observer side, reflected at the air interface of the prism array 1 and emitted to the observer side, and must pass through BM2 twice on the way. Is done. Therefore, a high external light suppression effect is realized.
  • the deflecting element 1 is not limited to the prism array illustrated in FIG. 1, but may be a lens array, a hologram, a mirror array, a fiber array, or the like having similar optical characteristics. A similar effect can be obtained.
  • a light absorbing member may be provided to cover all or part of the deflecting element other than the projector light incident part on the projector light incident side. This also absorbs the external light incident on the screen, and similarly a high external light suppression effect can be obtained.
  • FIG. 2 it is possible to obtain a higher external light 5 suppressing effect by arranging the light absorbing member 7 together with BM2.
  • the prism-shaped total reflection portion is covered with a light absorbing member.
  • the prism-shaped total reflection portion can be covered with the light absorbing member, and a higher effect of suppressing external light 5 can be obtained.
  • the upper surface of the prism is configured by joining a plurality of planes as shown in FIG. 3 (or the lower surface is similarly configured instead of or in addition to the upper surface).
  • the cross-sectional area of the projector light 4 passing through the BM2 surface can be reduced, the transmission surface area 2A can be reduced, and a higher external light 5 suppression effect can be obtained.
  • a projector (not shown) is further arranged on the exit side surface (observer side surface) of the diffusion film 3 so that the projector light has linearly polarized light. Therefore, it is possible to absorb only 50% of outside light that is generally non-polarized light without lowering the projector light utilization efficiency, and to further increase the contrast ratio of the displayed image. Further, by arranging a circular polarizer instead of the polarizer, when the projector light has circularly polarized light, in addition to the above effects, the backscattering in the diffusion film can be absorbed by the circular polarizer, and the display image It is possible to significantly increase the contrast ratio.
  • the deflection element is a prism array
  • the incident surface of the prism It is desirable that the projector light is incident perpendicularly to the projector.
  • the portion forming the transmission surface area of the BM (medium satisfying the transmission surface area) is matched in refractive index with the prism array and Z or the diffusion film.
  • the deflecting element is a prism array
  • a plurality of prisms for deflecting the projector light need not be present on the entire projector light incident side, but as shown in FIG.
  • a force projector that is designed so that all of the deflection element exit surface area is included in the BM transmission surface area is absorbed.
  • 80% or more of the BM is not limited to all of the deflection element exit surface area.
  • the case where it is included in the transmission surface area of the light is allowed, and the case where it is covered is also included in the scope of the present invention.
  • the present invention is not limited to all of the deflection element emission angle areas.
  • the case where 80% or more is included in the allowable incident angle region of the diffusing film is allowed, and the case where force is applied is also included in the scope of the present invention.
  • Fig. 1 shows an example in which the external light 5 incident on the transmission surface area 2A of BM2 is hardly absorbed in the transmission surface area 2A regardless of the incident angle, that is, the thickness of BM2 is almost infinitely small. It was.
  • This example is a force that conforms to a commonly used form of BM.
  • the present invention is not limited to this.
  • FIG. It may be the screen of the embodiment in which the minute is absorbed.
  • the transmission / absorption function of BM2 depends on both the surface area and the angle area, so that it is possible to further suppress the diffuse reflection of the external light 5 to the viewer side, which is preferable.
  • the above-mentioned condition that 80% or more of the deflection element exit surface area is included in the BM transmission surface area is satisfied, and thus the projector light utilization efficiency is the same as in FIG.
  • the width of the conventional BM transmissive surface area is about 30 ⁇ m, in order to obtain an external light absorption function in a practical angular region,
  • the thickness of the BM is preferably 10 m or more, more preferably 20 ⁇ m or more, further preferably 30 ⁇ m or more, and ideally 50 ⁇ m or more.
  • FIG. 5 shows an example of the screen in FIG. 1 in which the deflecting element 6 having a condensing function is used instead of the deflecting element 1 having no condensing function.
  • the deflecting element 6 having a condensing function by condensing the projector light 4 on the BM2 surface by the deflecting element 6 having a condensing function, the transmission surface area 2A of the BM2 surface is reduced and the utilization efficiency of the projector light 4 is reduced. Therefore, it is possible to increase the external light 5 suppression effect.
  • a prism array having a curved upper surface is used as the deflecting element 6 having a condensing function.
  • the lower surface of the prism is used.
  • the surface on which the light 4 is incident or a prism array with curved upper and lower surfaces may be used, or a lens array, hologram, mirror array, fiber array, etc. may be used instead of the prism.
  • the deflecting element is a prism array
  • the individual prisms are sufficiently fine, the assumption that the incident angle of the projector light does not change within one prism holds.
  • the BM absorption surface area can theoretically be set to approximately 100%. Therefore, when using a prism array in which only the upper surface of the prism is curved and the lower surface is flat as shown in FIG. It is desirable that the curve on the upper surface of the prism is such that the cross-sectional shape of the curved surface is a quadratic curve.
  • the ratio of the transmission surface area on the BM surface is not limited to an ideal shape in which the projector light is focused on one point on the BM surface. If it is 80% or less compared to the configuration using the deflecting element 1 having no light condensing function, this is allowed, and such a case is also included in the scope of the present invention.
  • the diffusion film force may also be such that the area from which the projector light is emitted becomes too small and the image may become discontinuous.
  • the deflection characteristics of the deflecting element differ depending on the location of the screen.
  • a part of the external light is absorbed by the BM, so that the contrast ratio can be increased.
  • the force shown in the cross-sectional view of the screen in FIGS. 1 to 6 As long as the above-described conditions are satisfied, a part of the external light is absorbed in the BM, so the structure in the direction perpendicular to the paper in the figure is not particularly limited .
  • the three-dimensional shape of the prism array is a Fresnel lens type prism array shape that can be obtained by rotating the screen cross-sectional figures of FIGS. 1 to 6 around one central axis perpendicular to the screen surface.
  • the prism array shape in which the cross-sectional shapes at all the positions in the vertical direction of FIGS. the effect of suppressing external light can be realized.
  • a BM material and a light-absorbing member material a material that is decomposed by photosensitivity and that peels only the decomposed portion by subsequent cleaning is used.
  • the light absorbing member material, the deflecting element, the BM material, and the diffusing film are laminated in this order, or the light absorbing member material, the deflecting element, and the diffusing film are stacked in this order, and the deflecting element is incident on this. It is preferable to use a manufacturing method in which projector light is incident from the side.
  • the projector light incident on the deflecting element exits to the deflecting element exit area corresponding to the projector light incident angle area according to the deflection characteristics of the deflecting element, and the BM material and Z or the light absorbing member material Is exposed to light, so that the exposed portion becomes the transmission surface area as it is. That is, according to this manufacturing method, the transmission surface area of the BM (in the case of a light absorbing member, the portion not covered by this corresponds to the transmission surface area) is automatically adjusted to the deflection element emission surface area. Can do.
  • the deflecting element can be formed of a lens array, a hologram, a mirror array, a fiber array, or the like in addition to the prism array.
  • Diffusion films are commonly used in the past, and include diffusion films that use diffusion due to internal fine particles, diffusion films that use diffusion due to surface roughness, hologram diffusion films, etc.
  • the prism array is used in the case where the prism array is used as the deflecting element.
  • the projector incident angle with respect to the BM was set to 55 ° to 75 °, and the ratio of the BM absorption area in the BM plane was derived by numerical simulation.
  • the allowable incidence angle region of the diffusion film was set to ⁇ 25 to 25 °. The angle is 0 ° for the direction normal to the prism alignment direction of the prism array (the normal of the surface where the prisms are aligned), and the counterclockwise direction is positive.
  • the angle of inclination of the upper and lower surfaces of the prism is 36 ° and -9 °, respectively, so that projector light with a projector light incident angle of 55 to 75 ° can be incident on the diffusion film without loss. It is possible to deflect in the angular region.
  • the ratio of the absorption surface area of BM is 38% and 74%, respectively.
  • the projector light is incident when the projector light incident angle is 55 °. Is incident on the top surface of the prism at an angle between 54.32 ° and 70.68 °. In addition, when the projector light incident angle is 75 °, the projector light is incident on the upper surface of the prism at an angle of 44.32 ° to 60.68 °.
  • this prism array is made of a material that totally reflects if the incident angle at the air interface is 41 ° or more, the projector light is totally reflected on the top surface of the prism, and the projector light is lost without loss. Can be deflected to an allowable angle range of incident light, and it is theoretically possible to absorb almost 100% of external light.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

L’invention concerne un écran de projection utilisant un élément de déviation, qui réfléchit/diffuse à peine la lumière parasite vers un utilisateur, et présentant un rapport de contraste élevé en environnement clair, ainsi qu’un système de projection. L’écran comprend un élément de déviation (1) qui dévie la lumière entrante d’une zone d’angle d’entrée de lumière de projecteur et la dirige vers une zone d’angle de sortie et une zone de surface de sortie d’élément de déviation correspondant à ladite zone d’angle d’entrée, une matrice noire (2) avec une zone de surface d’émission (2A) correspondant à la zone de surface de sortie et un film de diffusion (3) avec une zone d’angle autorisé d’entrée correspondant à la zone d’angle de sortie, qui diffuse la lumière arrivant de la zone d’angle de sortie et dirige la lumière diffusée vers une zone d’angle d’affichage correspondant à la zone d’angle de sortie. Les trois éléments sont disposés en strates dans l’ordre de mention pour constituer l’écran.
PCT/JP2006/309899 2005-05-20 2006-05-18 Ecran de projection utilisant un element de deviation et systeme d’affichage par projection Ceased WO2006123727A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005148265A JP2006323284A (ja) 2005-05-20 2005-05-20 偏向素子を用いたプロジェクションディスプレイ用スクリーン及びプロジェクションディスプレイシステム
JP2005-148265 2005-05-20

Publications (1)

Publication Number Publication Date
WO2006123727A1 true WO2006123727A1 (fr) 2006-11-23

Family

ID=37431299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/309899 Ceased WO2006123727A1 (fr) 2005-05-20 2006-05-18 Ecran de projection utilisant un element de deviation et systeme d’affichage par projection

Country Status (3)

Country Link
JP (1) JP2006323284A (fr)
TW (1) TW200710536A (fr)
WO (1) WO2006123727A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113433693A (zh) * 2021-06-16 2021-09-24 合肥疆程技术有限公司 一种显示系统、车载抬头显示器和车辆

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008191172A (ja) * 2007-01-31 2008-08-21 Tohoku Univ 広入射角レンジ対応レンズシートおよびリアプロジェクションディスプレイ用スクリーン
JP5119680B2 (ja) * 2007-02-21 2013-01-16 セイコーエプソン株式会社 スクリーン及びプロジェクションシステム
JP5358280B2 (ja) * 2009-05-12 2013-12-04 日立コンシューマエレクトロニクス株式会社 投写ボード装置、及びこれに用いる透過型スクリーン
TWI414673B (zh) * 2009-12-08 2013-11-11 Ind Tech Res Inst 導光微結構片，導光方法，以及窗戶結構的應用
JP5750355B2 (ja) * 2011-10-17 2015-07-22 株式会社有沢製作所 透過型スクリーン及びリアプロジェクション装置

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62249134A (ja) * 1986-04-22 1987-10-30 Mitsubishi Rayon Co Ltd 背面投影スクリ−ン
JPS6330835A (ja) * 1986-07-24 1988-02-09 Matsushita Electric Ind Co Ltd 透過型スクリ−ン
JPS6332528A (ja) * 1986-07-25 1988-02-12 Matsushita Electric Ind Co Ltd 透過型スクリ−ン
JPS63139331A (ja) * 1986-12-01 1988-06-11 Mitsubishi Rayon Co Ltd 背面投影スクリ−ン
JPH032742A (ja) * 1989-05-30 1991-01-09 Dainippon Printing Co Ltd 透過形スクリーン
JPH0627535A (ja) * 1992-07-06 1994-02-04 Casio Comput Co Ltd 透過式スクリーンおよび背面投影型表示装置
JP2000180973A (ja) * 1998-12-18 2000-06-30 Mitsubishi Rayon Co Ltd 透過型スクリーン
JP2002090888A (ja) * 2000-09-14 2002-03-27 Toppan Printing Co Ltd 背面投写型ディスプレイ装置
JP2002277963A (ja) * 2001-03-21 2002-09-25 Mitsubishi Electric Corp 背面投写スクリーン
WO2004034145A1 (fr) * 2002-10-11 2004-04-22 Tohoku Techno-Brains Corporation Ecran pour afficheur a projection par transparence
JP2004206037A (ja) * 2002-10-31 2004-07-22 Dainippon Printing Co Ltd フレネルレンズシート、透過型スクリーンおよび背面投射型表示装置
JP4073133B2 (ja) * 1999-11-25 2008-04-09 株式会社前川製作所 食鶏腿肉脱骨用自動筋入れ方法とその装置

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62249134A (ja) * 1986-04-22 1987-10-30 Mitsubishi Rayon Co Ltd 背面投影スクリ−ン
JPS6330835A (ja) * 1986-07-24 1988-02-09 Matsushita Electric Ind Co Ltd 透過型スクリ−ン
JPS6332528A (ja) * 1986-07-25 1988-02-12 Matsushita Electric Ind Co Ltd 透過型スクリ−ン
JPS63139331A (ja) * 1986-12-01 1988-06-11 Mitsubishi Rayon Co Ltd 背面投影スクリ−ン
JPH032742A (ja) * 1989-05-30 1991-01-09 Dainippon Printing Co Ltd 透過形スクリーン
JPH0627535A (ja) * 1992-07-06 1994-02-04 Casio Comput Co Ltd 透過式スクリーンおよび背面投影型表示装置
JP2000180973A (ja) * 1998-12-18 2000-06-30 Mitsubishi Rayon Co Ltd 透過型スクリーン
JP4073133B2 (ja) * 1999-11-25 2008-04-09 株式会社前川製作所 食鶏腿肉脱骨用自動筋入れ方法とその装置
JP2002090888A (ja) * 2000-09-14 2002-03-27 Toppan Printing Co Ltd 背面投写型ディスプレイ装置
JP2002277963A (ja) * 2001-03-21 2002-09-25 Mitsubishi Electric Corp 背面投写スクリーン
WO2004034145A1 (fr) * 2002-10-11 2004-04-22 Tohoku Techno-Brains Corporation Ecran pour afficheur a projection par transparence
JP2004206037A (ja) * 2002-10-31 2004-07-22 Dainippon Printing Co Ltd フレネルレンズシート、透過型スクリーンおよび背面投射型表示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113433693A (zh) * 2021-06-16 2021-09-24 合肥疆程技术有限公司 一种显示系统、车载抬头显示器和车辆

Also Published As

Publication number Publication date
TW200710536A (en) 2007-03-16
JP2006323284A (ja) 2006-11-30

Similar Documents

Publication Publication Date Title
JP2888602B2 (ja) 視準像を観測者の視野に導入する装置
EP1731943B1 (fr) Dispositif optique et dispositif de visualisation d'images virtuelles
US6728032B2 (en) Rear projection display system
US10078222B2 (en) Light guide device and virtual-image display device
US9618744B2 (en) Optical device and virtual image display apparatus
TWI243609B (en) Screen
JP2019101055A (ja) 空中映像表示装置
US9354500B2 (en) Screen for reflective projector
US20060092513A1 (en) Polarizing beam splitter and display including the same
JPWO2010061699A1 (ja) 薄型バックライトシステムおよびこれを用いた液晶表示装置
TW523609B (en) Illumination optical system and projector using the same
CN115997157A (zh) 空间悬浮影像信息显示系统和其中使用的光源装置
WO2006123727A1 (fr) Ecran de projection utilisant un element de deviation et systeme d’affichage par projection
JP2005010545A (ja) 透過型スクリーン及びそれを用いた背面投写型映像表示装置
CN116149065A (zh) 光学模组以及可穿戴设备
CN116500792A (zh) 光学模组和抬头显示器
JP4747408B2 (ja) スクリーンとそれを用いた立体表示システム
US20090086167A1 (en) Projection type image displaying apparatus
JP4041397B2 (ja) 画像表示装置
JP2000162710A (ja) 指向性反射スクリーンおよび画像表示装置
JP6820424B2 (ja) 画像表示装置
JP5397912B2 (ja) 反射型再帰性フロントスクリーンおよび反射型立体表示用スクリーン
CN111077678A (zh) 一种显示面板及显示装置
CN211905753U (zh) 一种光学透镜
JPH10221642A (ja) 画像表示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 06746587

Country of ref document: EP

Kind code of ref document: A1