Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Mitsubishi Kasei Corporation

Tadahiko Hamaguchi

Masatoshi Katoh

Tsuneo Sato

Kei Ishihara

Atsushi Tamaki

Kiyoshi Matsuda

Takashi Takeda

An image sensor uses an image reading element formed by integrating pixels for converting image information to an electric signal. In each of the pixels, a common electrode common to all the pixels and an individual electrode corresponding to each of the pixels are disposed through at least an organic photoconductive layer. A crosstalk capacitance of each of the pixels is equal to or smaller than 35% of a sum of an electric capacitance between individual electrodes and an output capacitance of the individual electrode. A blocking layer may be disposed between the common and individual electrodes. Each of the pixels may be constructed such that the individual electrode is arranged on a supporting body, and a blocking layer and the photoconductive layer are formed on the individual electrode, and the common electrode is arranged on the blocking and photoconductive layers. Otherwise, each of the pixels may be constructed such that the common electrode is arranged on a supporting body, and a blocking layer and the photoconductive layer are formed on the common electrode, and the individual electrode is arranged on the blocking and photoconductive layers.

Image sensor using organic photoconductor

In a color scanning system according to this invention, signals from the detectors of an image sensor for converting a color image into electric signals are subjected to specified processing, thereby to sharply reduce noise at the contour part of the image.

Color scanning system

In a color scanning system for producing color signals for an original scanned by an array of picture elements made up of multiple detectors with color filters, color distortion at boundaries between regions of different colors is reduced by means of signal processing. Differences in a brightness signal between adjacent picture elements are used to determine whether signals attributed to a detector of a given picture element will be signals detected on that detector or on a respective detector of an adjacent picture element, or a signal interpolated between signals from that detector and respective detectors of adjacent picture elements or between the respective detectors and a reference point. In a another embodiment, detectors in a row on picture elements are arranged in first and second rows. Each of the first and second rows has a charge coupled device (CCD) for storing color signals produced by the detectors in each row and for shifting the stored signals out. An intermediate storage device is interposed between the first row of detectors and the CCD. The intermediate device stores signals from the first row until the CCD of the second row samples signals. Thus, data in the CCDs of both rows are shifted out simultaneously.

Growing community of inventors

Kamakura, Japan

Tadahiko Hamaguchi