PAN TYPE LENS AND LIGHT EMITTING DIODE FOR BACKLIGHT MODULE

• Main Author: WU MENGAI
• Format: Patent
• Language: English
• Published: 27.07.2006
• 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; 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; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; WEAPONS

PROBLEM TO BE SOLVED: To provide a backlight module keeping a standardized brightness without increasing the whole module thickness. SOLUTION: The pan type lens 21 includes a light-transmitting surface 211, a light-reflecting surface 212, two smooth curvature surfaces 213, and a light-scattering surface 214. The light-transmitting surface 211 forms a concave bottom surface of the pan type lens 21. The light-reflecting surface 212 with virtually concave cross-section forms a top surface of the pan type lens 21. Smooth curvature surfaces 213 are translucent, which connect the light-reflecting surface 212 and the light-transmitting surface 211 with its position inclined, forming both sides of the pan type lens. The light-scattering surface 214 with a convex cross-section is located on a medial axis of the light-reflecting surface 212. The light-reflecting surface 212 includes a space 217 and a flat surface 218. The space 217 is positioned at the center of the light-transmitting surface 211 to accommodate a light emitting diode 601. COPYRIGHT: (C)2006,JPO&NCIPI