Electric lamp and discharge devices: systems – Plural power supplies – Periodic switch in one of the supply circuits
Reexamination Certificate
2006-05-23
2006-05-23
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Plural power supplies
Periodic switch in one of the supply circuits
C315S176000, C315S22700A, C345S213000
Reexamination Certificate
active
07049756
ABSTRACT:
A capacitive load driving circuit (1) for charging and discharging a capacitive load (11) is provided with a voltage divider (5) for dividing a power supply voltage (VH) into a plurality of different voltages (V1–V9), a plurality of condensers (2a–i) to which the voltages (V1–V9) are respectively charged as terminal voltages, and a switch (7) for switching connections between the capacitive load (11) and the condensers (2a–i), the switch (7) sequentially connecting the condensers (2a–i) in an ascending order of the terminal voltages so that electrostatic energy is supplied to the capacitive load (11) when the capacitive load (11) is charged, the switch (7) sequentially connecting the condensers (2a–i) in a descending order of the terminal voltages so that electrostatic energy is collected from the capacitive load (11) when the capacitive load (11) is discharged. With this, it is possible to provide a capacitive load drive circuit having a simple circuit configuration and capable of efficiently collecting and reusing energy accumulated in the capacitive load, and a capacitive load driving method.
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Aiba Masahiko
Fujita Hirokazu
Wada Takasumi
Birch & Stewart Kolasch & Birch, LLP
Tran Thuy Vinh
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