JPS6440838U - - Google Patents
Info
- Publication number
- JPS6440838U JPS6440838U JP13508887U JP13508887U JPS6440838U JP S6440838 U JPS6440838 U JP S6440838U JP 13508887 U JP13508887 U JP 13508887U JP 13508887 U JP13508887 U JP 13508887U JP S6440838 U JPS6440838 U JP S6440838U
- Authority
- JP
- Japan
- Prior art keywords
- screen
- screen body
- rear projection
- transparent sheets
- projection 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
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図はこの考案の一実施例を示す背面投影ス
クリーンの一部分の断面図、第２図および第３図
はそれぞれこの考案の他の実施例を示す背面投影
スクリーンの一部分の断面図、第４図は背面投影
スクリーンを使用する投影装置の原理図、第５図
は従来の背面投影スクリーンを示す第４図Ａ部に
おける拡大断面図である。
１０……スクリーン本体、１０ａ……光出射領
域、１１……表面側透明シート、１２……裏面側
透明シート、１３……ブラツクストライプ、１４
……光拡散レンズ面、１５……全反射面、１６…
…光線補正用フレネルレンズ面、１７……光拡散
層、１８……集光レンズ面。
FIG. 1 is a sectional view of a part of a rear projection screen showing one embodiment of this invention, FIGS. 2 and 3 are sectional views of a part of a rear projection screen showing other embodiments of this invention, and FIG. This figure is a principle diagram of a projection apparatus using a rear projection screen, and FIG. 5 is an enlarged sectional view of a conventional rear projection screen at section A in FIG. 4. DESCRIPTION OF SYMBOLS 10...Screen main body, 10a...Light emission area, 11...Front side transparent sheet, 12...Back side transparent sheet, 13...Black stripe, 14
...Light diffusing lens surface, 15... Total reflection surface, 16...
... Fresnel lens surface for light beam correction, 17 ... light diffusion layer, 18 ... condensing lens surface.
Claims (1)
させる背面投影スクリーンであつて、光屈折率が
異なる表裏２枚の透明シートを密着させたスクリ
ーン本体の前面に所定間隔でブラツクストライプ
を設けるとともに、前記スクリーン本体の表裏の
透明シートの境界面に前記各ブラツクストライプ
とそれぞれ対向させて、スクリーン背面からの入
射光をスクリーン本体前面の各ブラツクストライ
プ間の光出射領域に向けて反射させる全反射面を
形成したことを特徴とする背面投影スクリーン。 A rear projection screen that allows an optical image projected from the rear side to be observed from the front side, which has black stripes provided at predetermined intervals on the front surface of the screen body, which has two transparent sheets, front and back, having different optical refractive indexes in close contact with each other, and A total reflection surface is provided on the boundary surface of the front and back transparent sheets of the screen body, facing each of the black stripes, and reflecting incident light from the back side of the screen toward a light output area between each black stripe on the front side of the screen body. A rear projection screen characterized by forming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13508887U JPS6440838U (en) | 1987-09-04 | 1987-09-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13508887U JPS6440838U (en) | 1987-09-04 | 1987-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6440838U true JPS6440838U (en) | 1989-03-10 |
Family
ID=31394410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13508887U Pending JPS6440838U (en) | 1987-09-04 | 1987-09-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6440838U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003114481A (en) * | 2001-10-05 | 2003-04-18 | Mitsubishi Electric Corp | Translucent screen and projection type display |
| US7233439B2 (en) | 2003-09-08 | 2007-06-19 | Seiko Epson Corporation | Screen member for a transmission screen, a transmission screen and a rear projection |
-
1987
- 1987-09-04 JP JP13508887U patent/JPS6440838U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003114481A (en) * | 2001-10-05 | 2003-04-18 | Mitsubishi Electric Corp | Translucent screen and projection type display |
| US7233439B2 (en) | 2003-09-08 | 2007-06-19 | Seiko Epson Corporation | Screen member for a transmission screen, a transmission screen and a rear projection |
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