06222172 is referenced by 64 patents and cites 2 patents.

A light-emitting diode array is driven by a digital control. The digital control modulates the pulse width of pulses applied to the light-emitting diode. The intensity of the output is controlled by controlling the width of pulses applied to the light-emitting diode. Since light-emitting diodes have very low inertial energy, this system can be rapidly turned on and turned off. The output is integrated to produce a uniform output.

Title
Pulse-controlled light emitting diode source
Application Number
9/246013
Publication Number
6222172 (B1)
Application Date
February 4, 1999
Publication Date
April 24, 2001
Inventor
Gregory Waligorski
Arcadia
CA, US
Eric R Fossum
La Crescenta
CA, US
Agent
Fish & Richardson P C
US
Assignee
Photobit Corporation
CA, US
IPC
G01J 5/30
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