Tung & Associates
Light emitting device array driver circuit and current splitter circuit and method of splitting current therefor
The present invention discloses a current splitter circuit for splitting a supply current to multiple light emitting device strings of a light emitting device array. The current splitter circuit includes: a minimum selector circuit coupled to the multiple light emitting device strings to generate a minimum signal which indicates a minimum voltage of the light emitting device strings; and multiple current source circuits each including a first current source end coupled to a corresponding light emitting device string, a second current source end coupled to ground, and a current source control end receiving a current control signal related to the minimum signal, so as to control currents through the corresponding light emitting device string.
Richtek Technologies Corporation, R.O.C.
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H05B H05B G09G G09G H05B Y02B H05B H05B
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Chiawei Jing-Meng
Liao Liu