JPS63153246U - - Google Patents
Info
- Publication number
- JPS63153246U JPS63153246U JP1987046179U JP4617987U JPS63153246U JP S63153246 U JPS63153246 U JP S63153246U JP 1987046179 U JP1987046179 U JP 1987046179U JP 4617987 U JP4617987 U JP 4617987U JP S63153246 U JPS63153246 U JP S63153246U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- total reflection
- screen
- sides
- rear projection
- 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 1
- 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図および第２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斜視図および１
つのレンズ単位の光拡散状態図、第３図および第
４図はこの考案の他の実施例を示す背面投影スク
リーンの一部分の斜視図および１つのレンズ単位
の光拡散状態図である。
１…スクリーン本体、２…レンチキユラーレン
ズ、３…レンズ単位、４…レンズ部、４ｂ…直線
面、５…全反射面。
1 and 2 are perspective views of a portion of a rear projection screen showing one embodiment of this invention, and FIG.
FIGS. 3 and 4 are perspective views of a portion of a rear projection screen and diagrams of light diffusion of one lens unit, respectively, showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Screen body, 2... Lenticular lens, 3... Lens unit, 4... Lens part, 4b... Linear surface, 5... Total reflection surface.
Claims (1)
させる背面投影スクリーンであつて、スクリーン
表面に、頂部をレンズ部とし両側面を全反射面と
した多数のレンズ単位が連続するレンチキユラー
レンズを形成してなり、かつ前記レンチキユラー
レンズの各レンズ単位のレンズ部の中央部に、こ
のレンズ単位の両側の全反射面とそれぞれ対向す
る直線面を形成するとともに、前記全反射面を、
スクリーン背面側から入射光を前記直線面に向け
て反射集光させる彎曲面としたことを特徴とする
背面投影スクリーン。 It is a rear projection screen that allows the optical image projected from the back side to be observed from the front side, and the screen surface has a lenticular lens in which a number of continuous lens units each having a lens portion at the top and total reflection surfaces at both sides are arranged. A linear surface is formed in the center of the lens portion of each lens unit of the lenticular lens, and the total reflection surface is formed to face the total reflection surfaces on both sides of the lens unit.
A rear projection screen characterized by having a curved surface that reflects and condenses incident light from the rear side of the screen toward the linear surface.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046179U JPS63153246U (en) | 1987-03-28 | 1987-03-28 | |
| US07/079,883 US4875064A (en) | 1986-08-06 | 1987-07-30 | Projector apparatus with mirror means |
| US07/359,399 US4941732A (en) | 1986-08-06 | 1989-05-31 | Transmission type projection screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046179U JPS63153246U (en) | 1987-03-28 | 1987-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63153246U true JPS63153246U (en) | 1988-10-07 |
Family
ID=30865602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987046179U Pending JPS63153246U (en) | 1986-08-06 | 1987-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63153246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02119640U (en) * | 1989-03-14 | 1990-09-26 |
-
1987
- 1987-03-28 JP JP1987046179U patent/JPS63153246U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02119640U (en) * | 1989-03-14 | 1990-09-26 |