JPS612651U

JPS612651U - Transparent screen

Info

Publication number: JPS612651U
Application number: JP1984085721U
Authority: JP
Inventors: 誠本田
Original assignee: 大日本印刷株式会社
Priority date: 1984-06-09
Filing date: 1984-06-09
Publication date: 1986-01-09

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は光源とスクリーンとあ関係を示す側断面図、第
２図はフレネルレンズと入射光の関係を示す側断面図、
第３図ａは入射角度が２５度未満の場合、ｂは入射角度
が２５度以上の場合の光分布状態を説明する概略線図、
第４図は本考案による透過型スクリーンの構成を示す側
断面図、第５図は，第４図に示す蝿の目レンズシ一トの
二部拡大断面３，４・・・凸レンズ、５５・・・蝿の目
レンズシ一ト、６・・・光源（ＣＲＴ）、７・・・フレ
ネルレンズ、８・・・フレネルレンズシ一ト、９、・・
・一光層。Figure 1 is a side sectional view showing the relationship between the light source and the screen, Figure 2 is a side sectional view showing the relationship between the Fresnel lens and incident light.
FIG. 3 a is a schematic diagram illustrating the light distribution state when the incident angle is less than 25 degrees, and FIG. 3 b is a schematic diagram explaining the light distribution state when the incident angle is 25 degrees or more.
FIG. 4 is a side cross-sectional view showing the structure of the transmission screen according to the present invention, and FIG. 5 is an enlarged cross-section of two parts of the fly's-eye lens sheet shown in FIG.・Fly's eye lens sheet, 6... Light source (CRT), 7... Fresnel lens, 8... Fresnel lens sheet, 9...
・One light layer.

Claims

[Scope of utility model registration request]

(1) A first lens surface on which a plurality of convex lenses are arranged is formed on one surface, and a second convex lens is formed on the other surface so that the optical axis substantially coincides with each convex lens on the first lens surface. A transmissive screen consisting of a Fresnel lens sheet placed on the light source side of a lens sheet in which multiple lenses are arranged.

(2) The transmission type screen according to claim 1, which is a utility model registration, and is formed by having a lens surface of a Fresnel lens sheet facing the lens sheet.

(3) The transmission type screen according to claim 1, which is a registered utility model, and comprises a light-shielding layer provided on the viewer's side light condensing portion of the lens sheet.