Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy responsive load device
Reexamination Certificate
2007-11-27
2007-11-27
Chen, Shih-Chao (Department: 2821)
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Radiant energy responsive load device
C156S345240
Reexamination Certificate
active
10802591
ABSTRACT:
In a method of detecting arc discharge in a glow-discharge apparatus GD that has a high-frequency power source PS, a cutting pulse is output for time T1 to the high-frequency power source PS to stop a supply of power to the glow-discharge apparatus GD, when dVr/dt−dVf/dt increases over a first level, where Vf and Vr are a traveling-wave voltage and a reflected-wave voltage applied to the glow-discharge apparatus GD, respectively. Arc discharge is determined to have developed in the glow-discharge apparatus, when Vr/Vf increases to a second level or a higher level within a preset time To after the supply of power to the glow-discharge apparatus is stopped.
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A Minh Dieu
Chen Shih-Chao
Shibaura Mechatronics Corporation
Volpe and Koenig P.C.
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