DOWNWARD EMITTING TYPE BACKLIGHT SYSTEM

A downstream emissive backlight system is provided to offer a uniform emissive distribution at a low manufacturing cost, and to use an inexpensive LED, then to employ a smaller number of LEDs, thereby cutting down the manufacturing cost to the maximum. A flexible circuit board(101) is equipped. A do...

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Bibliographic Details
Main Authors LEE, HYUN KYUNG, SO, BYUNG HOON, YANG, DONG HYEN
Format Patent
LanguageEnglish
Published 26.02.2009
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 LOGIC ELEMENTS
OPTICS
PHYSICS
TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Summary:A downstream emissive backlight system is provided to offer a uniform emissive distribution at a low manufacturing cost, and to use an inexpensive LED, then to employ a smaller number of LEDs, thereby cutting down the manufacturing cost to the maximum. A flexible circuit board(101) is equipped. A dome-shaped key switch(111) is disposed in an upper part of the flexible circuit board. An optical film(150) covers the dome-shaped key switch and the flexible circuit board. A light source is disposed in one side portion on top of the flexible circuit board, and is arranged to make light incident toward an upper surface of the optical film by bending the one side portion of the flexible circuit board upwards.
Bibliography:Application Number: KR20070119536