Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 11, 2007
Patent Application Number
09855208
Date Filed
May 14, 2001
Patent Primary Examiner
Patent abstract
A system and method are provided for determining a light output of a light emitting diode (LED) in a scanner. The system includes a processor circuit to execute current control logic to obtain an optimum light output from the LED. The current control logic repeatedly applies increasing or decreasing currents to the LED until a saturation point is identified. This may be accomplished, for example, by comparing two measures of the light output of the LED for two different currents applied to the LED. When a difference equaling a predetermined threshold between the two measures is detected, then the saturation point is identified.
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