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1. 发明授权

US5186780A Method of manufacturing transmission type screen 失效
标题翻译：制造传输类型屏幕的方法
公开(公告)号：US5186780A
公开(公告)日：1993-02-16
申请号：US441385
申请日：1989-11-27
申请人： Kenichi Sakunaga , Mizuo Okada
发明人： Kenichi Sakunaga , Mizuo Okada
IPC分类号： G03B21/62
CPC分类号： G03B21/625
摘要： A transmission type screen having a screen body constituted by at least one plastic sheet formed of a multiplicity of transparent plastic strands arranged in the shape of a sheet, each the strands being welded together at outer surfaces thereof. Each of the transparent strand may have a main portion and another portion different from the main portion in terms of optical effects. This transmission type screen is manufactured by spinning off the transparent strands from a spinning nozzle while aligning the strands; welding each adjacent over of the strands to form a sheet; and forming a screen body from at least one sheet obtained in this manner.

2. 发明授权

US4953948A Rear projection screen 失效
标题翻译：背投屏幕
公开(公告)号：US4953948A
公开(公告)日：1990-09-04
申请号：US294875
申请日：1989-01-09
申请人： Akira Ito , Mizuo Okada
发明人： Akira Ito , Mizuo Okada
IPC分类号： G03B21/62 , G03B21/625
CPC分类号： G03B21/625
摘要： Provided is a rear projection screen formed with entrance lenses on a light receiving side of the screen and exit lenses on a light emanating side of the same for transmitting light rays from the entrance lenses to the exit lenses, wherein the central portion of the entrance lens is so shaped as to have a focal point locating on or near the exit lens surface, and the side portions of the entrance lens are so shaped as to have a focal point or points remote from the entrance lens than the focal point for the central portion.
摘要翻译：本发明提供一种背投屏幕，其在屏幕的受光面上形成有入射透镜，并在该光源的光发射侧形成出射透镜，用于将入射透镜的光线透射到出射透镜，其中入射透镜的中心部分被形成为具有位于出射透镜表面上或附近的焦点，并且入射透镜的侧部被成形为具有远离入射透镜的焦点或焦点，而不是中心部分的焦点。

3. 发明授权

US5058989A Transmission type screen and method of manufacturing the same 失效
标题翻译：传输类型屏幕及其制造方法
公开(公告)号：US5058989A
公开(公告)日：1991-10-22
申请号：US676789
申请日：1991-03-28
申请人： Kenichi Sakunaga , Mizuo Okada
发明人： Kenichi Sakunaga , Mizuo Okada
IPC分类号： G03B21/62
CPC分类号： G03B21/625
摘要： A transmission type screen having a screen body constituted by at least one plastic sheet formed of a multiplicity of transparent plastic strands arranged in the shape of a sheet, each the strands being welded together at outer surfaces thereof. Each of the transparent strand may have a main portion and another portion different from the main portion in terms of optical effects. This transmission type screen is manfactured by spinning off the transparent strands from a spinning nozzle while aligning the strands; welding each adjacent over of the strands to form a sheet; and forming a screen body from at least one sheet obtained in this manner.

4. 发明授权

US5121252A Projection screen and method for producing the same 失效
标题翻译：投影屏幕及其制造方法
公开(公告)号：US5121252A
公开(公告)日：1992-06-09
申请号：US692313
申请日：1991-04-26
申请人： Mizuo Okada , Kenichi Sakunaga , Shigetada Nakagawa , Shozo Saito
发明人： Mizuo Okada , Kenichi Sakunaga , Shigetada Nakagawa , Shozo Saito
IPC分类号： G03B21/56 , G03B21/62
CPC分类号： G03B21/62 , G03B21/56
摘要： A projection screen is comprised of a sheet formed by a multiplicity of light-transmitting plastic strands which strands are arranged and welded in parallel with one another. The width W (mm) of the screen and the pitch p (mm) of the strands meet the following condition (1):0.03.ltoreq.p.ltoreq.W/1000 (1)The radius of curvature R.sub.1 (mm) of the strand at a first side of the screen is determined by the following condition (2)0.5.times.p.ltoreq.R.sub.1 .ltoreq.p (2)The radius of curvature R.sub.2 (mm) of the strand at a second side of the screen meets the following condition(3):R.sub.2 .ltoreq.R.sub.1 (3).

5. 发明授权

US4921329A Rear projection screen 失效
标题翻译：背投屏幕
公开(公告)号：US4921329A
公开(公告)日：1990-05-01
申请号：US221531
申请日：1988-07-19
申请人： Akira Ito , Mizuo Okada
发明人： Akira Ito , Mizuo Okada
IPC分类号： G03B21/62 , G03B21/625
CPC分类号： G03B21/625
摘要： Provided is a rear projection screen of a certain configuration having an entrance surface receiving red, blue and green rays from projectors on a projecting side and formed therein entrance lenses and an exit surface allowing images synthesized or merged with the red, blue and green light rays to be observed on a viewing side and formed therein exit lenses corresponding respectively to the incident lenses, each of the entrance lenses are each of the exit lenses having optical axes and lens surfaces around the optical axes, respectively, with theoretical curvatures so that each entrance lens transmits red, blue and green light rays to the corresponding exit lens while the entrance lens converges the light rays into a certain converging area around the cross point between the lens surface of the corresponding exit lens and the optical axis if the configuration of the screen is theoretical, and each associated exit lens emits the converged light rays from the exit surface toward the viewing side over a predetermined viewing angle, wherein the curvature of each exit lens is made to be moderate more than the theoretical curvature of the exit lens, outside of the converging area around the cross point between the lens surface and the optical axis of the exit lens.
摘要翻译：本发明提供一种具有一定形状的背投屏幕，其入射面从突出侧的投影仪接收红色，蓝色和绿色光线，并形成入射透镜和允许与红色，蓝色和绿色光线合成或合并的图像的出射面在观察侧观察并在其上形成分别对应入射透镜的出射透镜，每个入射透镜分别具有围绕光轴的光轴和透镜表面的理论曲率，使得每个入口透镜将红色，蓝色和绿色光线透射到相应的出射透镜，而入射透镜会将光线会聚到相应出射透镜的透镜表面与光轴之间的交叉点周围的某个会聚区域，如果屏幕的配置是理论上的，并且每个相关联的出射透镜从出射表面朝向视图发射会聚的光线其中每个出口透镜的曲率被制成比出射透镜的理论曲率更适度，在透镜表面和出射光轴之间的交叉点周围的会聚区域外侧镜片。

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