Neon discharging lamp lighting apparatus with improved lighting

Details Neon discharging lamp lighting apparatus with improved lighting Neon discharging lamp lighting apparatus with improved lighting

1996-02-29

2000-04-25

Vu, David H.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

315219, 315224, 315DIG7, H05B 3700

Patent

active

060548134

ABSTRACT:
A neon discharging lamp lighting apparatus comprises a high frequency inverter of which an asymmetrical ratio of an output voltage waveform thereof is designated from 10 to 60% and a low pressure type neon discharging lamp connected to the high frequency inverter. Since the high frequency inverter circuit applies to the low pressure type neon discharging lamp a voltage having a waveform with an asymmetrical ratio for allowing rays of light free from luminance irregularity to be emitted, fringes can be prevented from taking place in rays of light emitted by the low pressure type neon discharging lamp. Thus, the low pressure type neon discharging lamp can operate as a high quality light source.

REFERENCES:
patent: 5001400 (1991-03-01), Nilssen
patent: 5272327 (1993-12-01), Mitchell et al.
patent: 5510680 (1996-04-01), Nilssen

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