Apparatus of driving light source for display device

Details Apparatus of driving light source for display device Apparatus of driving light source for display device

2006-12-05

2006-12-05

Shankar, Vijay (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S087000, C345S090000, C345S091000, C345S098000

Reexamination Certificate

active

07145546

ABSTRACT:
An apparatus of driving a light source for a display device includes a switching unit for selectively transmitting a DC input voltage, an oscillator for converting the DC input voltage into an AC voltage, and a transformer including a primary coil and a secondary coil for boosting the converted AC voltage using mutual inductance and for providing the boosted voltage for the light source. The driving apparatus further includes a current sensor for sensing a current in the oscillator or the secondary coil, and a light controller for controlling the switching unit based on the sensed current by the current sensor and a dimming control signal from an external device. Therefore, the current in the light source can be detected without a separate wire for connecting the light source and the light controller.

REFERENCES:
patent: 5027034 (1991-06-01), Ruby et al.
patent: 6317347 (2001-11-01), Weng
patent: 6388388 (2002-05-01), Weindorf et al.
patent: 6690121 (2004-02-01), Weindorf
patent: 6812916 (2004-11-01), Hwang
patent: 2002/0003525 (2002-01-01), Hwang

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