Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1991007851) MATRIX ADDRESSED LIQUID CRYSTAL LIGHT VALVE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007851 International Application No.: PCT/US1990/006447
Publication Date: 30.05.1991 International Filing Date: 09.11.1990
Chapter 2 Demand Filed: 14.06.1991
IPC:
G02F 1/135 (2006.01) ,H04N 9/31 (2006.01)
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01
for the control of the intensity, phase, polarisation or colour
13
based on liquid crystals, e.g. single liquid crystal display cells
133
Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
135
Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
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:
GREYHAWK SYSTEMS, INC. [US/US]; 1557 Centre Pointe Drive Milpitas, CA 95053, US
Inventors:
HAVEN, Duane, A.; US
STEFANOV, Michael, E.; US
BONE, Matthew, F.; US
KAHN, Frederic, J.; US
SLOBODIN, David; US
Agent:
TEST, Aldo, J. ; Flehr, Hohbach, Test, Albritton & Herbert 4 Embarcadero Center Suite 3400 San Francisco, CA 94111-4187, US
GALLIANI, William, S.; Flehr,Hohbach, Test, Albritton & Herbert Four Embarcadero Center Ste. 3400 San Francisco, CA 94111, US
Priority Data:
436,44714.11.1989US
Title (EN) MATRIX ADDRESSED LIQUID CRYSTAL LIGHT VALVE
(FR) VALVE DE LUMIERE A CRISTAUX LIQUIDES A ADRESSAGE MATRICIEL
Abstract:
(EN) This light valve comprises a light modulating and amplification device consisting of a photoconductor activated liquid-crystal light valve (50) together with an underlying structure. The underlying structure provides spatial, temporal and amplitude modulation to the liquid crystal light valve by means of a x, y matrix of photo-emissive, photo-refractive, or photo-transmissive elements (60) such as an active matrix liquid crystal (60b) or an AC thin film electroluminescent panel (60a).
(FR) Cette valve de lumière comprend un dispositif de modulation et d'amplification de lumière consistant en une valve de lumière à cristaux liquides activée par photoconducteur (50) et en une structure sous-jacente. La structure sous-jacente assure une modulation spatiale, temporale et d'amplitude à la valve de lumière à cristaux liquides au moyen d'une matrice x, y d'éléments photo-émetteurs, photo-réflecteurs ou phototransmetteurs (60) tels qu'un cristal liquide matriciel actif (60b) ou un panneau électroluminescent à fine pellicule AC (60a).
Designated States: CA, JP, KR
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)