PROJECTION TYPE DISPLAY DEVICE AND MULTI-SCREEN DISPLAY DEVICE USING THE SAME

PROBLEM TO BE SOLVED: To lower the heat-resistant temperature of a luminous flux control means for reducing irregular intensity and irregular color caused by the vignetting at the edge of a projection lens, and also to restrain the lowering of contrast caused by stray light. SOLUTION: The projection...

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Bibliographic Details
Main Authors EBIHARA MASAYUKI, NAKAO MITSUYA, SATO TADASHI, KOBAYASHI KAZUO, KANBARA TAKASHI, TANAKA KEIICHIRO, SAKAMOTO SHUICHI, ICHIKAWA KIMIFUNE
Format Patent
LanguageEnglish
Published 15.03.2007
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING
ELECTROGRAPHY
FREQUENCY-CHANGING
HOLOGRAPHY
NON-LINEAR OPTICS
OPTICAL ANALOGUE/DIGITAL CONVERTERS
OPTICAL LOGIC ELEMENTS
OPTICS
PHOTOGRAPHY
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:PROBLEM TO BE SOLVED: To lower the heat-resistant temperature of a luminous flux control means for reducing irregular intensity and irregular color caused by the vignetting at the edge of a projection lens, and also to restrain the lowering of contrast caused by stray light. SOLUTION: The projection type display device is equipped with: a light source; a liquid crystal panel; an integrator comprising a first lens array and a second lens array and uniformly illuminating the liquid crystal panel; the projection lens for enlarging and projecting an optically modulated image by the liquid crystal panel onto a screen; and the luminous flux control means for controlling luminous flux made incident on the integrator from the light source between the light source and the integrator. The luminous flux made incident from the peripheral part of the reflection mirror of the light source out of the luminous flux made incident on the integrator from the light source is intercepted by the luminous flux control means. COPYRIGHT: (C)2007,JPO&INPIT
Bibliography:Application Number: JP20060306131