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For using them as a optical source of inspections equipment for LCD panel, the design of excellent backlight system, brightness uniformity and high power and good protection against heat is essential. In this paper, backlight system which is built in the 45 inch side emitting LCD backlight by LED array structure and driving circuit were designed and developed. After that, their performances were measured. It showed the luminance from 3,000 to 25,000[cd/m 2 ], the mean value x:0.3144, y:0.3076 of x-y chromaticity, dimming range of 27~515[cd/m 2 ], free flicker noise in the 80kHz and black level of 0.7~0.1[cd/m 2 ], thermal test of cooling system in 20,000[cd/m 2 ] over values. Key Words : LCD, LED, Backlight Array, Side Emitting, Medical Display Equipment 1.    (BLU: backlight unit)  LCD     (light source), , , ,   ,          ,   [1,2].   slim , ,  , ,      LED  [3-5]. LED            , , ,     .      ,            LED  BLU          . ,

The Fabrication and Design of Driving Circuit for LCD panel using the high efficiency LED