FLAT PANEL DISPLAY DEVICE USING BACKPROJECT SCREEN

• Main Author: RANDARU DEII BURANCHIYAADO
• Format: Patent
• Language: English
• Published: 03.03.1995
• Edition: 6
• 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HOLOGRAPHY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHOTOGRAPHY; PHYSICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

PURPOSE: To provide a flat panel display system in which a video with high contrast which is not affected by direct sunlights can be obtained. CONSTITUTION: This device is provided with a light modulation liquid crystal display module 34, collimated light source means 10 for transmitting a collimated light to the back face of this liquid crystal display module 34, and back projecting screen 40 arranged so as to be adjacent to the front face of the liquid crystal display module 34. The back projecting screen 40 is provided with a polarizer and a diffuser, and an optical fiber face plate 38 is provided between the back projecting screen 40 and the front face of the liquid crystal display module 34. The collimated light source means 10 is provided with a Fresnel lens 26, and an illuminated light is vertically supplied to the back face of the liquid crystal display module 34.