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1. (WO1998053364) LIGHT-MODULATING ELEMENT AND PROJECTION DISPLAY
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1998/053364 International Application No.: PCT/JP1998/002200
Publication Date: 26.11.1998 International Filing Date: 19.05.1998
IPC:
G03B 21/00 (2006.01) ,H04N 9/31 (2006.01)
G PHYSICS
03
PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
B
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21
Projectors or projection-type viewers; Accessories therefor
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
9
Details of colour television systems
12
Picture reproducers
31
Projection devices for colour picture display
Applicants: HASHIZUME, Toshiaki[JP/JP]; JP (UsOnly)
HABA, Shinji[JP/JP]; JP (UsOnly)
SEIKO EPSON CORPORATION[JP/JP]; 4-1, Nishi-shinjuku 2-chome Shinjuku-ku Tokyo 163-0811, JP (AllExceptUS)
Inventors: HASHIZUME, Toshiaki; JP
HABA, Shinji; JP
Agent: SUZUKI, Kisaburo ; Seiko Epson Corporation Intellectual Property Dept. 3-5, Owa 3-chome Suwa-shi Nagano-ken 392-8502, JP
Priority Data:
9/13009320.05.1997JP
9/33061901.12.1997JP
Title (EN) LIGHT-MODULATING ELEMENT AND PROJECTION DISPLAY
(FR) ELEMENT MODULATEUR DE LUMIERE ET ECRAN DE PROJECTION
Abstract:
(EN) Liquid crystal modulating elements (light-modulating elements) (925R, G, B) are so arranged that the light-emerging surfaces (9252R, G, B) thereof are opposed to light-entering surfaces (911R, G, B) of a color combining prism (910). Transparent plates (970R, G, B) are respectively stuck to the light-emerging surfaces (9252R, G, B). This prevents dust from adhering to the light-emerging surfaces (9252R, G, B), and also prevents the reflection of light due to a difference in the refractance at the interface between the light-emerging surfaces (9252R, G, B) and the air. Therefore, an image of a high quality can be projected without deteriorating the switching characteristics of the liquid crystal modulating elements (925R, G, B), since the light-emerging surfaces (9252R, G, B) are not contaminated.
(FR) Des éléments modulateurs à cristaux liquides (éléments modulateurs de lumière) (925R, V, B) sont agencés de manière que leurs surfaces (9252R, G, B) de sortie de lumière se trouve en face de surfaces (911R, V, B) d'entrée de lumière d'un prisme de combinaison chromatique (910). Des plaques transparentes (970R, V, B) sont plaquées respectivement sur les surfaces (9252R, V, B) de sortie de lumière. Ceci empêche la poussière d'adhérer aux surfaces (9252R, V, B) de sortie de lumière, et empêche également le reflet de la lumière dû à une différence de réfractance à l'interface entre les surfaces (9252R, V, B) de sortie de lumière et l'air. Par conséquent, on peut projeter une image de haute qualité sans détériorer les caractéristiques de commutation des éléments modulateurs à cristaux liquides (925R, V, B) étant donné que les surfaces (9252R, V, B) de sortie de lumière ne sont pas contaminées.
front page image
Designated States: CN, JP, KR, US
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)