MULTICOLOR PROJECTION TYPE LIQUID CRYSTAL DISPLAY

Japanese Patent JPS6468090

A

PURPOSE:To attain miniaturization, high luminance and high contrast by being composed of a single light source, two dichroic mirrors, projecting system composed of three reflection type liquid crystal elements and projecting lens, and a writing system having a semiconductor laser as a main part. CONSTITUTION:White projected light irradiated from a xenon arc lamp is narrowed down by a lens system 13 and reflected to a dichroic mirror 121 side by a mirror 141 provided on a central part in a projecting lens 16 by an off-axis optical system. Out of the reflected white light, only a blue light component is reflected by the dichroic mirror 121, reflected by a mirror 142 and made incident on a liquid crystal element 151. Out of red and green light components to permeate through the dichroic mirror 121, only the green light component is reflected by a dichroic mirror 122, reflected by a mirror 143 and made incident on a liquid crystal element 152. The red one permeates through the dichroic mirrors 121 and 122 and is made incident on a liquid element 153. Thus, the miniaturization, the high luminance and the high contrast can be attained.

JP3257067	LIQUID CRYSTAL PROJECTOR
WO/2022/141825	AUTOMATIC FOCUSING PROJECTION METHOD AND SYSTEM
JP2580285	[Title of Invention] 3-tube projection television

FUNAHATA KAZUYUKI
NAGAE KEIJI
MORI YUJI
HASHIMOTO TADAHIKO

JP22407387A

March 14, 1989

September 09, 1987

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HITACHI LTD

H04N9/31; (IPC1-7): H04N9/31

JPS61177079A	1986-08-08
JPS6113885A	1986-01-22

Masami Akimoto

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