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    • 29. 发明授权
    • Rear projection screen
    • 背投屏幕
    • US4525029A
    • 1985-06-25
    • US564301
    • 1983-12-22
    • Masao InoueShingo SuzukiHajime Gotoh
    • Masao InoueShingo SuzukiHajime Gotoh
    • H04N5/72G03B21/62G03B21/625G03B21/60
    • G03B21/625
    • In the embodiments of the invention disclosed herein a rear projection screen has a projection surface and a viewing surface with one of the surfaces formed so as to serve as a lens to provide bright stripe portions where the light passes and dark stripe portions where no light passes. Grooves are formed in the viewing surface along the dark stripe portions and thread-like members are disposed in these grooves as light-absorbing means. The lens formed in the screen surface may be formed of lenticules grooves having total reflection surfaces provided on both sides thereof and a Fresnel lens may be provided on the projection side surface. The thread-like members may be self-adhesive and may be disposed under tension in a screen having a curved surface. A diffusion agent and/or a light-absorbing colorant may be mixed into a medium constituting the screen.
    • 在本文公开的本发明的实施例中,背投屏幕具有​​突出表面和观察表面,其中一个表面形成为用作透镜,以提供光通过的亮条部分和没有光通过的暗条纹部分 。 在沿着暗条纹部分的观察表面上形成槽,并且在这些槽中设有线状构件作为光吸收装置。 形成在屏幕表面上的透镜可以由在其两侧设置有全反射面的微细凹槽形成,并且可以在突出侧表面上设置菲涅尔透镜。 螺纹状构件可以是自粘合的,并且可以在具有弯曲表面的筛网中在张力下设置。 扩散剂和/或吸光性着色剂可以混合到构成筛网的介质中。