JPH0197327U - - Google Patents
Info
- Publication number
- JPH0197327U JPH0197327U JP1987193371U JP19337187U JPH0197327U JP H0197327 U JPH0197327 U JP H0197327U JP 1987193371 U JP1987193371 U JP 1987193371U JP 19337187 U JP19337187 U JP 19337187U JP H0197327 U JPH0197327 U JP H0197327U
- Authority
- JP
- Japan
- Prior art keywords
- lens sheet
- approximate spherical
- close contact
- spherical surface
- spherical shape
- 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
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Transforming Electric Information Into Light Information (AREA)
- Overhead Projectors And Projection Screens (AREA)
Description
第１図は、本考案による透過形スクリーンの一
実施例を示した斜視図である。第２図は、本考案
による透過形スクリーンの断面形状の他の実施例
を示した図である。第３図は、本考案による透過
形スクリーンの製造工程の他の実施例を示した図
である。第４図は、従来の透過形スクリーンの一
例を示した図、第５図は、同従来例透過形スクリ
ーンの問題点を説明するための図である。
１…本考案による透過形スクリーン、１１，２
０，２２，２４，２６，２８，３０，３２…フレ
ネルレンズシート、１２，２１，２３，２５，２
７，２９，３１，３３…レンチキユラーレンズシ
ート、１３…光吸収層、４…従来の透過形スクリ
ーン、４１…フレネルレンズシート、４２…レン
チキユラーレンズシート、５…プロジエクタ。
FIG. 1 is a perspective view showing an embodiment of a transmissive screen according to the present invention. FIG. 2 is a diagram showing another embodiment of the cross-sectional shape of the transmission screen according to the present invention. FIG. 3 is a diagram showing another embodiment of the manufacturing process of a transmission type screen according to the present invention. FIG. 4 is a diagram showing an example of a conventional transmissive screen, and FIG. 5 is a diagram for explaining problems with the conventional transmissive screen. 1... Transmissive screen according to the present invention, 11, 2
0, 22, 24, 26, 28, 30, 32... Fresnel lens sheet, 12, 21, 23, 25, 2
7, 29, 31, 33... Lenticular lens sheet, 13... Light absorption layer, 4... Conventional transmission screen, 41... Fresnel lens sheet, 42... Lenticular lens sheet, 5... Projector.
Claims (1)
ンズシートの両レンズシートが同一方向に凸にな
るように成形されて密着している透過形スクリー
ンにおいて、前記各レンズシートは、その断面が
２以上の直線および／または曲線を組み合わせた
近似球面状になるように成形されることを特徴と
する透過形スクリーン。 (2) 前記近似球面状に成形されるレンズシート
は、その近似球面の内側がレンチキユラーレンズ
シートであることを特徴とする実用新案登録請求
の範囲第１項記載の透過形スクリーン。 (3) 前記近似球面状に成形されるレンズシート
は、内側になる方のレンズシートの外側の近似球
面の曲率半径が、外側になる方のレンズシートの
内側の近似球面の曲率半径と等しいかもしくはそ
れよりも小さくなるように成形されており、両レ
ンズシートを周縁部で強制的に密着させることに
より全体が密着することを特徴とする実用新案登
録請求の範囲第１項記載の透過形スクリーン。[Claims for Utility Model Registration] (1) In a transmission screen in which both a Fresnel lens sheet and a lenticular lens sheet are molded so as to be convex in the same direction and are in close contact with each other, each of the lens sheets is A transmission screen characterized in that its cross section is shaped into an approximate spherical shape that is a combination of two or more straight lines and/or curves. (2) The transmission screen according to claim 1, wherein the lens sheet formed into an approximate spherical shape is a lenticular lens sheet on the inside of the approximate spherical surface. (3) In the lens sheet formed into the approximate spherical shape, is the radius of curvature of the outer approximate spherical surface of the inner lens sheet equal to the radius of curvature of the inner approximate spherical surface of the outer lens sheet? The transmission type screen according to claim 1 of the utility model registration claim, which is formed to be smaller than that, and is characterized in that the entire lens sheet is brought into close contact by forcibly bringing both lens sheets into close contact with each other at the periphery. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987193371U JPH0197327U (en) | 1987-12-18 | 1987-12-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987193371U JPH0197327U (en) | 1987-12-18 | 1987-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0197327U true JPH0197327U (en) | 1989-06-28 |
Family
ID=31484165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987193371U Pending JPH0197327U (en) | 1987-12-18 | 1987-12-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0197327U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6061738A (en) * | 1983-09-16 | 1985-04-09 | Hitachi Ltd | Screen in back projecting device |
-
1987
- 1987-12-18 JP JP1987193371U patent/JPH0197327U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6061738A (en) * | 1983-09-16 | 1985-04-09 | Hitachi Ltd | Screen in back projecting device |