Method for driving light emitting diode

Details Method for driving light emitting diode Method for driving light emitting diode

2006-11-21

2006-11-21

Tran, Henry N. (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S082000, C345S690000, C345S212000, C315S169100, C315S169300, C315S169400

Reexamination Certificate

active

07138969

ABSTRACT:
A method for sequentially driving light emitting diodes (LEDs) arranged in an array is provided. The method includes steps of a) electrically connecting anodes and cathodes of the LEDs to a ground; b) keeping the cathodes of a first part of the LEDs being electrically connected to the ground; c) increasing anode potentials of the LEDs to a first reference potential, and floating the cathodes of other parts of the LEDs simultaneously; d) supplying a current to the first part of the LEDs, and increasing cathode potentials of the other parts of the LEDs to a second reference potential simultaneously; and e) repeating the steps a)–d) for a second part of the LEDs. In which, the first part of the LEDs is arranged in a target row of the array and the second part of the LEDs is arranged in a row next to the target row.

REFERENCES:
patent: 5844368 (1998-12-01), Okuda et al.
patent: 6501226 (2002-12-01), Lai et al.
patent: 6608448 (2003-08-01), Boer
patent: 6650308 (2003-11-01), Kawashima
patent: 6714177 (2004-03-01), Ishizuka

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