LIGHT SOURCE ADAPTED FOR LCD BACK-LIT DISPLAYS

• Main Authors: MOK THYE LINN, TAN SIEW KIM
• Format: Patent
• Language: English
• Published: 29.11.2006
• Subjects: BASIC ELECTRIC ELEMENTS; 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; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEMICONDUCTOR DEVICES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

An LED(Light Emitting Diode) die apparatus and a surface illuminating method are provided to increase the amount of light reaching a light pipe, thereby improving the light collecting efficiency, by using a substrate having a reflective surface. A light source includes a plurality of LED dies arranged in an array along a first direction. Each of the LED dies emits a light in a second direction. A light pipe(73) includes a transparent material layer having an upper surface(74), a bottom surface(75), and an edge surface. A reflective plate reflects the light from the LED dies, which move in the second direction, into the edge surface of the light pipe, thereby reflecting a portion of the light by the upper surface and the bottom surface of the reflective plate.