Driver of cold-cathode fluorescent lamp

Details Driver of cold-cathode fluorescent lamp Driver of cold-cathode fluorescent lamp

1998-05-06

1999-03-23

Nguyen, Matthew

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Silicon controlled rectifier ignition

310318, 323299, H05B 3700, H02N 200, G05F 500

Patent

active

058864776

ABSTRACT:
In a driver of a CCFL for lightening the CCFL by using a piezoelectric transformer, a current supplied from a power source or a power consumption of the CCFL is detected and the piezoelectric transformer is on-off driven at a frequency different from an operating frequency of the piezoelectric trabsformer by a pulse width modulation signal having a duty cycle ratio corresponding to the detected value. The current supplied from the power source does not exceed a predetermined value, so that a capacity of the power source can be small and thus the cost of the power source can be reduced.

REFERENCES:
patent: 4982141 (1991-01-01), Pace
patent: 5731652 (1998-03-01), Shimada
patent: 5739679 (1998-04-01), Takehara et al.

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