초록 ▼

A rear projection screen suitable for use as, for example, a screen for video projector. The rear projection screen is provided with a lenticulated surface at least one the viewer\s side thereof. The lenticulated surface is constituted by a plurality of lenticule units each having total reflection s

A rear projection screen suitable for use as, for example, a screen for video projector. The rear projection screen is provided with a lenticulated surface at least one the viewer\s side thereof. The lenticulated surface is constituted by a plurality of lenticule units each having total reflection surfaces on both inclined flanks thereof and a plurality of curved surface portions between both inclined flanks. The arrangement is such that a part of the light rays impinging from the projection side of the screen are reflected by the total reflection surfaces and then pass through the curved surface portions of each lenticule unit. Another type of lens may be formed between each of the adjacent lenticule units.

대표청구항 ▼

A rear projection screen having front and rear surfaces and a light transmitting medium therebetween, the screen being adapted to receive light rays at the rear surface and transmit the rays through the medium and cause them to emanate from the front surface, the front surface being formed with a pl

A rear projection screen having front and rear surfaces and a light transmitting medium therebetween, the screen being adapted to receive light rays at the rear surface and transmit the rays through the medium and cause them to emanate from the front surface, the front surface being formed with a plurality of parallel lenticule units arranged to disperse emanating light rays over a wide angle, each lenticule unit being formed with a pair of flanks and with a crest having only two curved surfaces, one adjacent to each flank, each flank having a portion extending toward the rear surface of the screen which forms an angle greater than the critical angle to the plane of the rear surface so as to provide a total reflection surface to reflect transmitted rays incident on that flank portion and cause them to emanate through the adjacent curved surface.