Control circuit for balancing current and method thereof

Details Control circuit for balancing current and method thereof Control circuit for balancing current and method thereof

2006-04-03

2009-10-20

Shalwala, Bipin (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S039000, C345S052000, C345S063000, C345S077000, C345S214000

Reexamination Certificate

active

07605807

ABSTRACT:
A control circuit for balancing current in a thin display device includes a light source, a power supply, and a control part. The light source includes a plurality of parallel light-emitting diode (LED) rows. The LED row includes at least one LED and a switch unit. The switch unit is in series connection with the LED. The switch unit has two working conditions, one is on and the other is off, to determine whether the current passes through the LED row. The power supply provides a working power for the LEDs. The control part detects the currents of the LED rows, controls the on-state timing ratio of the switch unit and controls the output power of the power supply.

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