Displays having improved contrast

Details Displays having improved contrast Displays having improved contrast

1991-10-15

1992-12-29

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 84, 359 54, 359 53, 359 98, G02F 113

Patent

active

051756374

ABSTRACT:
A display presenting an image having enhanced contrast has a screen which switches between a bright, image-presenting state and a dark, image-less state, to minimize glare from ambient light reflections. Alternatively, a shutter which switches between a substantially transparent state and a dark, light absorbing state is placed over a conventional screen.

REFERENCES:
patent: 4299447 (1981-11-01), Soltan
patent: 4451852 (1984-05-01), Masuda et al.
patent: 4611889 (1986-09-01), Buzak
patent: 4613207 (1986-09-01), Fergason
patent: 4652087 (1987-03-01), Bos et al.
patent: 4693560 (1987-09-01), Wiley
patent: 4758818 (1988-07-01), Vatne
patent: 4995719 (1991-02-01), Shanks
patent: 4997271 (1991-03-01), Shanks

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