Reflective projection-type displaying apparatus

Details Reflective projection-type displaying apparatus Reflective projection-type displaying apparatus

1998-11-20

2000-05-23

Schuberg, Darren E.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 34, 349 62, 349106, G02B 532

Patent

active

060671769

ABSTRACT:
A projection-type displaying apparatus is disclosed. The apparatus has a coupling prism, a glass substrate joined to the coupling prism and a liquid crystal display panel containing pixel electrodes. A refractive index of the coupling prism is greater than a refractive index of the glass substrate. The apparatus also has a transmission-type holographic color filter provided between the glass substrate and liquid crystal display panel. Light beams enter the apparatus through the plane of incidence of the coupling prism and go through the glass substrate. The light beams are then focused onto the pixel electrodes by the holographic color filter. The focused light beams are modulated by the pixel electrodes and exit the apparatus as projection light beams.

REFERENCES:
patent: 5737040 (1998-04-01), Ichikawa et al.

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