DRIVER CICRUIT APPARATUS FOR AN LED STRING, LIGHT SOURCE APPARATUS AND INTEGRATED CIRCUIT
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United States of America Patent
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Issued Date -
Feb 14, 2013
app pub date -
Feb 15, 2010
filing date -
Feb 15, 2010
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Abstract
A driver circuit apparatus for light emitting diodes comprises a current mirror (212) that includes a first branch for coupling to a first string of light emitting diodes (202), and a second branch for coupling to a second string of light emitting diodes (204). The apparatus also comprises a voltage controlled current source (214) coupled to the current mirror (212).
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