Image reading device

Abstract

An image reading system which reads the images of a detectable object comprising an image display device that has an image display area to display images having luminosity corresponding to the display gradation and radiates the display illumination according to this luminosity; a detection surface in which the entire image display area of the image display device is covered with a laminated layer arrangement and a detectable object is placed; an image reading device comprising a first sub-area in the detection surface on which the detectable object is placed and a second sub-area which consists of an area corresponding to at least a portion of the area of the image display area except for the first sub-area; and a plurality of photosensors arranged in a matrix form provided in the first sub-area and second sub-area which has uniform transmittance, wherein at least a portion of the display illumination is permeated and the image of the detectable object is read in the first sub-area. While being able to read a detectable object image adequately, the image display can be performed satisfactorily.

Description

technical field [0001] The present invention relates to an image reading device, and more particularly to an image reading device which has an image display function in addition to an image reading function and can be well mounted on a small electronic device such as a portable device. A personal authentication system that uses a device to authenticate the user himself. Background technique [0002] Conventionally, as an image reading device that reads fine concave-convex shapes such as fingerprints, etc., it is generally known to detect electrostatic capacitance based on a potential difference generated between a subject (finger) and a detection sensor, thereby reading fingerprints, etc. Semiconductor-type device structure such as electrostatic capacitance reading type of the subject image; or taking the subject image through an optical system such as a prism or a mirror, and using light sensors such as CCD or CMOS sensors arranged in a matrix to read light and dark informa...

AI Technical Summary

Problems solved by technology

[0007] However, in the case of this structure, the size of the electronic equipment, especially the portable electronic equipment, will increase, which hinders the mobility of the portable electronic equipment.

On the contrary, in order to suppress the increase in the size of electronic equipment, the size of the image reading device may be reduced. In this case, it is difficult to read the subject image such as fingerprints satisfactorily, and there is a problem that personal authentication cannot be performed stably.

Images