P-36: LCD Planar Backlight Employing the External Electrode Fluorescent Lamps Driven by Square Pulses from Switching Inverter

The planar luminaries with the external electrode fluorescent lamps arrayed on a flat panel for the LCD-backlight have been improved by driving with the square pulses from a single switching inverter. With the square pulses of the driving frequency about 30 kHz, the high efficiency up to 40–70 lm/W and high brightness up to 30,000 cd/m2 along with the luminance uniformity 90% in the 15-inch, 18-inch, 21-inch diagonal panels, respectively, could be obtained.