Light guide panel for TFT-LCD back light unit and TFT-LCD back light unit and TFT-LCD device

• Main Author: CHI CHUL GOO,KIM MAN SUK,JEONG O. YONG,HAN YOUNG SU
• Format: Patent
• Language: English
• Published: 06.06.2007
• Subjects: 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; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Disclosed are a light guide panel for a TFT-LCD back light unit and a TFT-LCD back light unit and a TFT-LCD device having the same. The light guide panel (30) includes a main light guide member (300) for converting light into uniform plane light and emitting the plane light through an upper surface thereof; and subsidiary light guide member (330), each of which is disposed at the corresponding one of the side surfaces of the main light guide member and is provided with a first surface (331) being close to the corresponding side surface of the main light guide member, a second surface (332) being parallel with the first surface (331), having a height higher than that of the first surface (331), and being close to the corresponding one of light sources (305), and connection surfaces (333, 334) for connecting the first surface (331) and the second surface (332).