Kyocera Document Solutions Inc.

Kyocera Mita Corporation

Hirotoshi Tagawa

Yasuyuki Horiguchi

Kei Ouchi

Masahiro Higashitani

Katsuhiko Okamoto

Sou Takahashi

An image reading device includes a contact glass, a document transport device, a first reading module, a second reading module, a opposite roller, and roller holders. The opposite roller transports a document while keeping it in close contact with an image reading surface of the second reading module arranged inside the document transport device. The roller holders rotatably support the opposite roller, and on their faces facing the second reading module, a pair of patterns for detection is provided to detect the inclination of the opposite roller. The patterns for detection are each formed to be increasingly wide toward a first end side in the axial direction upstream from an intersection in a central part thereof in the document transport direction, and increasingly wide toward a second end side opposite from the first end side downward from the intersection in the document transport direction.

Image reading device and image forming apparatus therewith

An image processing portion determines that a black stripe is present when among a plurality of main scanning lines included in a back end side range from a last back end position of the reading image data in a sub-scanning direction to a predetermined position, a main scanning line in which a density value of a pixels in a predetermined position is higher than a first threshold density is present, sets, at a reference line, a main scanning line farthest from the last back end position among the main scanning lines in which the density value of the pixel in the predetermined position is higher than the first threshold density and replaces density values of all pixels included in a range from a position of the reference line in the sub-scanning direction to the last back end position with a density value corresponding to white.

Image reading device and image forming apparatus

An image reading device includes a light source, an imaging element and a control unit. The light source irradiates light on a document. The irradiated light of the light source reflected by the document is incident on the imaging element. The control unit is configured to, if the document is an ordinary document having no light-emitting screen, set a light amount of the irradiated light of the light source at a predetermined reference value and is configured to, if the document is a special document having a light-emitting screen, reduce the light amount of the irradiated light of the light source to become lower than the reference value.

An image scanning device has an image sensor including a plurality of arrayed light receiving elements; a light source for shining light upon a scanning object; a lens unit for guiding reflected light from a scanning object to the image sensor and having a plurality of rod lens arrays, in which a plurality of rod lenses are arrayed, joined together; and a correction unit for generating image data based on the output values from the light receiving elements of the image sensor and correcting the pixel values of pixels in the image data corresponding to a position of a joint section between rod lens arrays so that the pixel values become darker.

Image scanning device, image forming device, and method for correcting pixel value for pixel corresponding to position of rod lens array joint

An image reading device is provided. The image reading device suppresses uneven intensity of light emitted on a subject, by disposing a diffusion plate between the subject and a plurality of luminescence portions, and an image forming device that includes this image reading device. The image reading device includes an illumination portion that irradiates light onto a subject. The illumination portion includes: a plurality of LED's disposed at predetermined intervals in a main scanning direction; and an elliptical diffuser plate that is disposed between the subject and the plurality of LED's and diffuses light emitted by the plurality of LED's in a higher diffusion rate in the main scanning direction than in a sub-scanning direction.

Image reading device and image forming device

The present invention is aimed at providing an image reading device that suppresses generation of a so-called edge shadow while suppressing uneven intensity of light emitted onto an original. A color copy machineincludes an illumination portionthat irradiates an original G with light. The illumination portionincludes a plurality of LEDsdisposed at predetermined intervals in a main scanning direction, an elliptical diffuser platethat is disposed between the plurality of LEDsand the original G and causes the light emitted by the plurality of LEDsto diffuse, and a second reflection mirrorB that reflects light, which is a portion of the light diffused by the elliptical diffuser plateand not directly irradiated onto the original G, so as to irradiate the light onto the original G.

Growing community of inventors

Osaka, Japan

Hirotoshi Tagawa