Projection apparatus and observation apparatus

A Okuyama - US Patent 6,513,934, 2003 - Google Patents
The present invention relates to an apparatus for project ing an image and an apparatus for
observing an image and, more particularly, to those Suitably applicable to liquid crystal …

Projection display having polarization compensator

AL Huang - US Patent 6,781,640, 2004 - Google Patents
5,221,982. A 6/1993 Faris 5,272,553 A 12/1993 Yamamoto et al............. 349/8 (57)
ABSTRACT 5,329,387 A 7/1994 Yanagisawa et al. 5,381,278 A 1/1995 Shingaki et al. A …

Color liquid crystal projector having an improved optical system

K Aoto, K Yanagawa - US Patent 6,454,416, 2002 - Google Patents
A color liquid crystal projector has an optical system for color splitting. The optical system
includes a mirror for reflecting a first primary-color light and transmitting second and third …

Image projection system and method of using same

AP Minich, L Shapiro - US Patent 5,517,263, 1996 - Google Patents
An image projection system includes a bright light source of polarized light, and in one form
of the invention, a spatial light modulator, having an alignment layer, to modulate the …

Illumination system for an LCD display system

JF Goldenberg, JD Eskin - US Patent 4,913,529, 1990 - Google Patents
An illumination system for an LCD projection display system to increase the brightness of the
system. The system includes a polarizing beam splitter which splits a beam of light from a …

Color liquid crystal projector device

K Ueda, T Miyake - US Patent 5,852,479, 1998 - Google Patents
A liquid crystal projector includes a light source for generating light; a liquid crystal display
device for modulating the light; a projection optical system for projecting light modulated by …

Liquid-crystal projector with light beam reduction lens array for improved brightness of image outer portions

T Shimazaki - US Patent 4,722,593, 1988 - Google Patents
(57) ABSTRACT A liquid-crystal projector reduces outer portions of a light beam
corresponding to a projection image from a liquid-crystal display panel illuminated with light …

Apparatuses and methods for high-efficiency polarization conversion in a projection light engine

L Li - US Patent App. 13/243,871, 2013 - Google Patents
BACKGROUND 0001 Embodiments of the present invention are related generally to the
field of projection light engines and, more particularly, to apparatuses and methods for high …

Etendue efficient combination of multiple light sources

KK Li - US Patent App. 12/638,486, 2010 - Google Patents
In response to these needs, the present invention uses a waveguide system to perform the
polarization recovery function in an LCD projection system. In particular, the present …

Image display system and method

S Yamazaki, Y Hirakata, J Koyama… - US Patent …, 2010 - Google Patents
An image display system comprises a first liquid crystal pro jector which projects a
counterclockwise-rotating, circularly polarized light beam to form an image containing …