Line illumination device and image input apparatus using the same

Abstract

The invention provides a line illumination device with a compact structure containing a light source and a light-guiding body inside a frame as well as a simple power supply structure of the light source, and an image input device using the line illumination device. The rod-shaped light-guiding body (1) is contained inside the frame (6), and the light source (3) emitting light into the light-guiding body (1) is arranged at the end part of the light-guiding body (1) so that a flexible substrate (4) loading the light source (3) is bent and contained inside the frame (6); wiring installed on the flexible substrate (4) supplies power for the light source (3) so as to emit out line-shaped light from the light-guiding body (1).

Description

technical field [0001] The present invention relates to a line illuminating device that injects light from a light source into a light guide and emits it in a linear form, and an image input device using the line illuminating device for discriminating banknotes and the like. Background technique [0002] Conventionally, image sensors have been used in equipment such as facsimile machines and scanners. For the image sensor, a line illumination device is generally used. [0003] [Patent Document 1] Japanese Patent Laid-Open No. 2001-357429 (Fig. 3) [0004] [Patent Document 2] Japanese Patent Laid-Open No. 2003-60854 (Fig. 1) [0005] [Patent Document 3] Japanese Patent Laid-Open No. 2004-64146 (Fig. 1) [0006] As such a line lighting device, Patent Document 1 ( FIG. 3 ) describes a configuration in which LEDs mounted on a substrate are arranged on side surfaces (ends) of a light guide. In addition, Patent Document 2 ( FIG. 1 ) describes a structure in which a light guide...

AI Technical Summary

Problems solved by technology

However, in Patent Document 2, it is described that the light guide is accommodated by a cover, but there is no description in any of the Patent Documents that not only the light guide but also the light source (light source unit or light source module) are also accommodated in the cover or the frame. Structure

That is, in the above-mentioned patent documents, there is no description of such a compact structure that accommodates the light guide and the light source in the frame.

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