Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Discharge device load
Reexamination Certificate
2005-08-09
2005-08-09
Vo, Tuyet Thi (Department: 2821)
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Discharge device load
C315S056000, C313S620000, C313S621000, C313S622000
Reexamination Certificate
active
06927539
ABSTRACT:
An ultra-high pressure high pressure discharge lamp device in which the lamp voltage and the distance between the lamp electrodes can be kept stable is achieved by an operating device supplying an alternating current with rectangular waves to the discharge lamp and control is exercised such that a lower boundary value is set and the operating voltage is increased by reducing the operating frequency of the discharge lamp by a given amount, when the operating voltage of the discharge lamp is below the set lower boundary value. Furthermore, control can also be exercised in such a way that an upper boundary value is set and the operating voltage is reduced by increasing the operating frequency of the discharge lamp by a given amount when the operating voltage of the discharge lamp exceeds the set upper boundary value.
REFERENCES:
patent: 5109181 (1992-04-01), Fischer et al.
patent: 6271628 (2001-08-01), Sugitani et al.
patent: 6545430 (2003-04-01), Ono et al.
patent: 2003/0080693 (2003-05-01), Ono et al.
patent: 2004/0000880 (2004-01-01), Ozasa et al.
Arimoto Tomoyoshi
Suzuki Yoshikazu
Nixon & Peabody LLP
Safran David S.
Ushiodenki Kabushiki Kaisha
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