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Self-discharge synchronizing operations in the external electrode fluorescent multi-lamps backlight

Guangsup Cho1, Nam O Kwon1, Young M Kim1, Sung J Kim1, Tae S Cho1, Bong S Kim1, June G Kang1, Eun H Choi1, Ung W Lee2, Soon C Yang2 and Han S Uhm3

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The external electrode fluorescent lamp (EEFL) is operated in a high frequency mode because the lamp lighting is basically a dielectric barrier discharge. The self-discharge synchronization is defined by synchronizing the self-discharge time of the dielectric wall charge with the voltage rising and falling time. It is shown that for the self-discharge synchronization a high brightness is obtained in the multi-lamps backlight connected in parallel with the EEFLs operated with square waves from a switching inverter. The frequency for self-discharge synchronizing is also shown to increase as the driving voltage increases.


PACS

42.72.Bj Visible and ultraviolet sources

84.30.Ng Oscillators, pulse generators, and function generators

52.80.Hc Glow; corona

84.30.Jc Power electronics; power supply circuits

Subjects

Electronics and devices

Optics, quantum optics and lasers

Plasma physics

Dates

Issue 20 (21 October 2003)

Received 28 June 2003

Published 1 October 2003



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