JPS63153245U - - Google Patents
Info
- Publication number
- JPS63153245U JPS63153245U JP1987046178U JP4617887U JPS63153245U JP S63153245 U JPS63153245 U JP S63153245U JP 1987046178 U JP1987046178 U JP 1987046178U JP 4617887 U JP4617887 U JP 4617887U JP S63153245 U JPS63153245 U JP S63153245U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- total reflection
- sides
- rear projection
- 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.)
- Granted
Links
- 230000000630 rising effect Effects 0.000 claims description 2
- 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、４ａ…凹レ
ンズ面、４ｂ…凸レンズ面、５…全反射面、５ａ
…立上り面。
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, 4a... Concave lens surface, 4b... Convex lens surface, 5... Total reflection surface, 5a
...Rising 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を、その中央を
凹レンズ面とし、両側を前記凹レンズ面と連続す
る凸レンズ面とした形状とするとともに、前記各
レンズ単位の両側の全反射面の上端側を、この全
反射面の傾斜角よりも急角度で立上る立上り面と
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. The lens portion of each lens unit of the lenticular lens has a shape with a concave lens surface at the center and convex lens surfaces continuous with the concave lens surface on both sides, and both sides of each lens unit A rear projection screen characterized in that the upper end side of the total reflection surface is a rising surface that rises at a steeper angle than the inclination angle of the total reflection surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046178U JPH0518749Y2 (en) | 1987-03-28 | 1987-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987046178U JPH0518749Y2 (en) | 1987-03-28 | 1987-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63153245U true JPS63153245U (en) | 1988-10-07 |
| JPH0518749Y2 JPH0518749Y2 (en) | 1993-05-18 |
Family
ID=30865600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987046178U Expired - Lifetime JPH0518749Y2 (en) | 1987-03-28 | 1987-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0518749Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59133535A (en) * | 1983-01-20 | 1984-07-31 | Dainippon Printing Co Ltd | Translucent screen |
| JPS59193436A (en) * | 1983-04-18 | 1984-11-02 | Victor Co Of Japan Ltd | Transmission type screen |
| JPS60159733A (en) * | 1983-12-30 | 1985-08-21 | ノ−ス・アメリカン・フィリップス・コンシュ−マ・エレクトロニクス・コ−ポレ−ション | Back production screen |
-
1987
- 1987-03-28 JP JP1987046178U patent/JPH0518749Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59133535A (en) * | 1983-01-20 | 1984-07-31 | Dainippon Printing Co Ltd | Translucent screen |
| JPS59193436A (en) * | 1983-04-18 | 1984-11-02 | Victor Co Of Japan Ltd | Transmission type screen |
| JPS60159733A (en) * | 1983-12-30 | 1985-08-21 | ノ−ス・アメリカン・フィリップス・コンシュ−マ・エレクトロニクス・コ−ポレ−ション | Back production screen |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0518749Y2 (en) | 1993-05-18 |