Influence of auxiliary discharges on a multi-lamps backlight for large area LCD TVs

Summary form only given, as follows. In this study a new model is presented for a direct lighting backlight arrayed with multi-lamps of the cold cathode fluorescent lamps (CCFLs) and the external electrode fluorescent lamps (EEFLs). Avoiding the non-uniformity of luminance and the high voltage operation in a conventional direct lighting backlight driven by a single inverter power system for large area panels of LCD TVs, the auxiliary electrodes are placed under the reflection sheet in the backlight, of new model These electrodes lead to an auxiliary discharge at the center of the tube and also sustain the uniform field strength along the discharge tube inside of the longitudinal direction. These auxiliary discharges provide the luminance uniformity in each lamps and the low driving voltage.