Rear projection screen having resistance to change of external h

Details Rear projection screen having resistance to change of external h Rear projection screen having resistance to change of external h

1998-08-26

2000-07-11

Metjahic, Safet

Optical: systems and elements

Projection screen

359451, 359455, 359457, G03B 2156, G03B 2160

Patent

active

060881585

ABSTRACT:
A rear projection screen free from lowering of resolution which is caused when the screen set undergoes separation or undesirably warps due to a change in the external humidity. The rear projection screen is composed of a plurality of sheets, a front surface sheet 13, a lenticular lens sheet 11 and a Fresnel lens sheet 12. The front surface sheet 13 and the Fresnel lens sheet 12 are respectively composed of two layers, an inner layer 13a, 12a and an outer layer 13b, 12b. The inner layer 13a, 12a is made from a material having susceptibility to water higher than that of a material from which the outer layer 13b, 12b is made.

REFERENCES:
patent: 4730897 (1988-03-01), Mckechnie et al.
patent: 4868261 (1989-09-01), Kobayashi et al.
patent: 4910291 (1990-03-01), Yamamoto et al.
patent: 4961642 (1990-10-01), Ogino
patent: 5337179 (1994-08-01), Hodges
patent: 5745288 (1998-04-01), Miyata et al.

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