Light source of image reading apparatus and driving device...

Details Light source of image reading apparatus and driving device... Light source of image reading apparatus and driving device...

2007-05-29

2007-05-29

Moe, Aung S. (Department: 2625)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S512000, C358S514000, C358S509000, C358S475000, C250S208100

Reexamination Certificate

active

10214577

ABSTRACT:
The object of the invention is to extend the life of the light source while uniformizing the illuminance intensity in the main scanning direction. The invention is based on a light source of image reading apparatus comprised of film layers laminated on a transparent substrate in the order of a transparent electrode, an area light emitter and a metal electrode, and emitting light by impressing a specific voltage on these two electrodes. And an area light emitter column configured by arranging area light emitters corresponding to each color of R (red), G (green) and B (blue) in the sub scanning direction, or a monochrome area light emitter is arranged repeatedly in the main scanning direction. Accordingly, even when somewhere in the light emitting element has a defect like the film thickness is thin, the current gathering at this point with the low resistance value becomes a very small volume. Therefore, it would not occur that the film burns out from here.

REFERENCES:
patent: 6195183 (2001-02-01), Fujimoto et al.
patent: 6643038 (2003-11-01), Kawahara et al.
patent: 6882379 (2005-04-01), Yokoyama et al.
patent: 02/07427 (2002-01-01), None

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