SCANNER, AND LIGHT SOURCE DEVICE USED THEREFOR

摘要

PROBLEM TO BE SOLVED: To shorten warm-up time required for a scanner employing a cold cathode fluorescent tube as a light source. SOLUTION: A scanner 100 comprises a light source 110, an optical sensor module 150, a gain amplifier 160 and a signal processing module 170. The light source 110 comprises a cold cathode fluorescent tube 115, a light emitting diode module 120, an optical sensor 125, a servo control module 130 and a light emitting diode drive module 135 and a cold cathode fluorescent tube drive module 140. Just after the start of the scanner 100, the servo control module 130 drives the light emitting diode module 120 by controlling the light emitting diode drive module 135 via a first control signal CS1 and then drives the cold cathode fluorescent tube 115 by controlling the cold cathode fluorescent tube drive module 140 via a second control signal CS2. COPYRIGHT: (C)2008,JPO&INPIT