LED array and partitive driving method therefor using overlapping activation periods
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United States of America Patent
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-
Nov 5, 1991
Issued Date -
N/A
app pub date -
Dec 5, 1989
filing date -
Mar 21, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An LED array has a plurality of LED blocks each of which can independently be illuminated or extinguished. The LED array includes an illumination control unit for illuminating, after the lapse of a time period T1 after a block is illuminated, a succeeding block; an extinguishment control unit for extinguishing, after the lapse of a time period T2 after a block is illuminated, another block which has been illuminated since before the former block was illuminated; and a time control unit for determining the time period T2. The time control unit is adapted to automatically control the time period T2 in accordance with the outputs from a line sensor which reads out an original image illuminated by the LED array.
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