JPH02134527U - - Google Patents
Info
- Publication number
- JPH02134527U JPH02134527U JP1989042874U JP4287489U JPH02134527U JP H02134527 U JPH02134527 U JP H02134527U JP 1989042874 U JP1989042874 U JP 1989042874U JP 4287489 U JP4287489 U JP 4287489U JP H02134527 U JPH02134527 U JP H02134527U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- lens surfaces
- concentric
- fresnel lens
- screen
- 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.)
- Pending
Links
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
Description
第１図は本考案の一実施例を示す投射型デイス
プレイ装置用スクリーンの断面図、第２図は従来
の同スクリーンの断面図である。
１……投射型デイスプレイ装置用スクリーン、
２…フレネルレンズ、２ａ……同心円状レンズ面
、２ｂ……段差部の壁面、３……レンチキラーレ
ンズ、３ａ……半円筒面状レンズ面、４……吸収
層または光散乱層。
FIG. 1 is a sectional view of a screen for a projection type display device showing an embodiment of the present invention, and FIG. 2 is a sectional view of the conventional screen. 1...Screen for projection type display device,
2...Fresnel lens, 2a...Concentric lens surface, 2b...Wall surface of step portion, 3...Wrench killer lens, 3a...Semi-cylindrical lens surface, 4...Absorption layer or light scattering layer.
Claims (1)
つフレネルレンズで構成され、表示画面側の面が
整列した多数の半円筒面状レンズ面を持つレンチ
キラーレンズで構成された投射型デイスプレイ装
置用スクリーンにおいて、 前記フレネルレンズにおける隣接する同心円状
レンズ面の境界の段差部の壁面に可視光を吸収す
る吸収層を形成したことを特徴とする投射型デイ
スプレイ装置用スクリーン。 ２ ＣＲＴ側の面が多数の同心円状レンズ面を持
つフレネルレンズで構成され、表示画面側の面が
整列した多数の半円筒面状レンズ面を持つレンチ
キラーレンズで構成された投射型デイスプレイ装
置用スクリーンにおいて、 前記フレネルレンズにおける隣接する同心円状
レンズ面の境界の段差部の壁面に、可視光を散乱
する光散乱層を形成したことを特徴とする投射型
デイスプレイ装置用スクリーン。[Claims for Utility Model Registration] 1. A lenticiller lens consisting of a Fresnel lens whose surface on the CRT side has a number of concentric lens surfaces, and whose surface on the display screen side has a number of aligned semi-cylindrical lens surfaces. In the screen for a projection type display device constructed as above, an absorption layer for absorbing visible light is formed on a wall surface of a stepped portion at a boundary between adjacent concentric lens surfaces of the Fresnel lens. . 2 For projection type display devices, in which the surface on the CRT side is composed of a Fresnel lens with many concentric lens surfaces, and the surface on the display screen side is composed of a wrenchkiller lens with many aligned semicylindrical lens surfaces. A screen for a projection display device, characterized in that a light scattering layer for scattering visible light is formed on a wall surface of a stepped portion at a boundary between adjacent concentric lens surfaces of the Fresnel lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989042874U JPH02134527U (en) | 1989-04-12 | 1989-04-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989042874U JPH02134527U (en) | 1989-04-12 | 1989-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02134527U true JPH02134527U (en) | 1990-11-08 |
Family
ID=31554798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989042874U Pending JPH02134527U (en) | 1989-04-12 | 1989-04-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02134527U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027399A1 (en) * | 2000-09-29 | 2002-04-04 | Mitsubishi Denki Kabushiki Kaisha | Fresnel lens, screen, image display device, lens mold manufacturing method, and lens manufacturing method |
| WO2003040824A1 (en) * | 2001-11-09 | 2003-05-15 | Mitsubishi Denki Kabushiki Kaisha | Image display system |
-
1989
- 1989-04-12 JP JP1989042874U patent/JPH02134527U/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002027399A1 (en) * | 2000-09-29 | 2002-04-04 | Mitsubishi Denki Kabushiki Kaisha | Fresnel lens, screen, image display device, lens mold manufacturing method, and lens manufacturing method |
| US6726859B2 (en) | 2000-09-29 | 2004-04-27 | Mitsubishi Denki Kabushiki Kaisha | Fresnel lens, screen, image display device, lens mold manufacturing method and lens manufacturing method |
| US7116476B2 (en) | 2000-09-29 | 2006-10-03 | Mitsubishi Denki Kabushiki Kaisha | Fresnel lens, screen, image displaying device, lens forming mold manufacturing method and lens manufacturing method |
| WO2003040824A1 (en) * | 2001-11-09 | 2003-05-15 | Mitsubishi Denki Kabushiki Kaisha | Image display system |