LIQUID CRYSTAL DISPLAY APPARATUS

• Main Authors: KAKU NOBUYUKI, ABE FUKUOKU, OGIJI KENJI
• Format: Patent
• Language: English
• Published: 02.04.2009
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; 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; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; LIGHTING; MECHANICAL ENGINEERING; NON-LINEAR OPTICS; NON-PORTABLE LIGHTING DEVICES; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEMICONDUCTOR DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To provide a technology for providing a uniform and high luminance image quality, in a liquid crystal display apparatus using an LED back light. SOLUTION: This liquid crystal display apparatus has a liquid crystal display 3 and a plurality of light emitting diodes 7 as a directly underlaying type back light which is disposed on a rear surface of the liquid crystal display so as to irradiate lights upon the liquid crystal display, wherein a light guidance member 5 formed of a light transmissive member is provided at least corresponding to each one or more of light emitting diodes, and the light guidance member 5 is formed in a cylindrical configuration, and reflection surfaces are defined on each of outer wall surfaces 53 and inner wall surfaces 52 of the cylindrical light guidance member so as to reflect the lights from the light emitting diodes by these reflection surfaces, and thereby guiding them onto a side of the liquid crystal display. COPYRIGHT: (C)2009,JPO&INPIT