Hitachi, Ltd.

Hitachi Maxell, Limited

Hitachi-omron Terminal Solutions, Corporation

Mitsunari Kano

Yoshiharu Konishi

Toshihiko Matsuda

Junichi Oizumi

Yoshitaka Takezawa

Kaneo Mohri

Toshiro Uemura

Jiro Kino

Morihiko Takashi

Eiji Mizuno

Satoshi Shimada

Masahiko Ibamoto

Soshiro Kuzunuki

Toshiaki Nakamura

Shunichi Oohara

Junichi Katagiri

Ikuo Takeuchi

Toshio Oshima

Masao Okayama

Kousuke Noda

Shinji Ohyama

Yukio Akimoto

Ryoko Sato

Noriaki Hagiwara

Manabu Sato

Muneharu Nakabayashi

Toshirou Uemura

Yutaka Nagasawa

Itsuki Hayashi

Hirofumi Noguchi

Tomoaki Ishitsuka

The technique of the present invention enhances the stability of paper material identification of sheets. To achieve the above purpose, both short-wavelength light in the range of 370 nm and long-wavelength light in the range of 420 to 1000 nm are irradiated to paper to be identified in identifying the paper material. The identification is carried out, based on the difference in absorbance of the paper, which is obtained for each irradiated light. The absorbance of the paper varies according to the paper material, thereby enabling the identification of the paper material free from influence, which are caused by differences in manufacturing process, such as shading patterns. In addition, the simultaneous use of the short-wavelength light and the long-wavelength light declines influence on the absorbance, which are caused by environmental factors, such as humidity and deterioration of sheets, thereby resulting in stable identification of the paper material.

Paper quality discriminating machine

Improving reducing or eliminating the effects of variation in characteristics of the resonance circuit in a resonance type displacement detection apparatus, so as to improve displacement detection accuracy. In a displacement detection system, the resonance frequency range assumable by the resonance circuitis estimated in advance, there is determined a drive frequency variation range f&#x2013;fsuch that the estimated resonance frequency range is included therein, and by means of a variable oscillator, drive frequency is repeatedly varied between the first frequency fand the second frequency f. Accordingly, where the resonance frequency of the resonance circuitis fr, when the drive frequency has changed to fr, resonance voltage Vglmay be obtained in the case of large gap G. Where the resonance frequency of the resonance circuitis fr, when the drive frequency has changed to fr, resonance voltage Vglmay be obtained in the case of large gap G.

Displacement detection apparatus and displacement detection method

In reading an image of the document, the CCD sensor reads the image of the document through the image reading lens. The reading head including the image reading lens and the CCD sensor is arranged deviated from the center of the document reading area so that the reading head is removed from above the document. The image of the document read in is corrected by the image correction device, and the corrected image is displayed on the display.

Document reading apparatus

A bill discriminating method of discriminating a paper material independent of a light/dense pattern caused by a difference of manufacturing steps and discriminating a paper material of paper without being influenced by humidity or deterioration of the paper material is provided, Two kinds of infrared rays of different kinds of wavelengths are irradiated onto the paper, thereby discriminating the paper material of the paper by using an absorbance difference between photometric values.

Method and apparatus for paper material discrimination with two near-infrared lights

An automatic code recognizing apparatus includes an arithmetic operation unit for calculating the distance from a barcode scanner to the upper surface center of an article to be detected and the distances from barcode scanners to the side surface centers of the article to be detected based on detection signals from a height sensor and a TV camera. A mirror is controlled to focus the focal positions of the barcode scanners on the upper surface center and side surface centers of the article based on the result of calculation of the arithmetic operation unit. With this arrangement, there can be provided the automatic barcode recognizing apparatus capable of recognizing a barcode with a pinpoint accuracy and excellent responsiveness.

Apparatus and method for treating a commodity by automatically

A method of and an apparatus for detecting information from a code marking formed on a carrier by illuminating the code marking with illuminating light and detecting an emission from an illuminated position on which the illuminating light is projected. The code marking is a two-dimensional code marking bearing the information in first and second directions perpendicular to each other, and an illuminated area at the illuminated position is of a fine ribbon-like shape having a length greater than a maximum possible width of the code marking in the first direction and smaller than a minimum possible information width in the second direction. Illumination of the code marking is carried out by moving in a direction parallel to the second direction while traversing in the first direction.

Two-dimensional code mark detecting method and apparatus therefor

A magnetic detector for detecting a magnetism present in the vicinity of or close to a magnetic wire circumferentially magnetized therein and an electromagnet for generating an A.C. magnetic field on the basis of the magnitude of a Matteucci-effect voltage developed across the magnetic wire when the electromagnet approaches the magnetic wire. A coordinate input device for detecting proximity between the electromagnet and an array of a plurality of such magnetic wires arranged in X and Y directions when the electromagnet approaches the array. A magnetic image sensor for detecting an intensity distribution of a static magnetic field to be detected and present along a longitudinal direction of the wire on the basis of a detection voltage of the wire when a plurality of such electromagnets arranged along the longitudinal direction of the wire are sequentially excited one after another.

Magnetic detector using Matteucci effect

Coordinate input device using Matteucci effect

An optical character reader apparatus includes an image sensor, and a background reflection plate having such reflectivity which allows the image sensor to detect the entry of a document carrying thereon image information such as characters, graphics or the like within the field of view of the image sensor. A method of correcting a shading phenomenon comprises steps of setting a scan timing period of the image sensor at a first scan period, reading the reflection plate with the first scan period, setting the scan timing period of image sensor at a second scan period which is shorter than the first scan period, transporting the document in the field of view of the image sensor, detecting periphery of the document under the timing corresponding to the second scan period, cutting out image information on the document on the basis of the detected periphery thereof, correcting the cut out image information with respect to the shading with reference to the image sensor output derived through reading operation under the timing corresponding to the first scan period, and recognizing the image data undergone the correction of the shading.

Method of correcting shading phenomenon in optical character reader

In a liquid crystal display combined with a signal input tablet of the type which includes a light source, a liquid crystal display disposed on the light source and a transparent tablet for detecting a planar write position by a hand-writing pen which tablet is disposed on the liquid crystal display, the present invention is characterized in that a two-dimensional lens array is disposed as one-to-one erect imaging optical system between the liquid crystal display and the transparent tablet so that the display image of the liquid crystal display is projected as the same size erect image on the surface of the transparent tablet having a light diffusion operation.

Liquid crystal display combined with signal input tablet

In a method of driving an image sensor comprised of a plurality of image sensor chips to sequentially deliver image outputs from the image sensor chips, start signals are initially applied to all of the image sensor chips at the beginning of the drive timing, a shift clock is applied to only each one of the plurality of image sensor chips which is so selected as to deliver an image output, and image outputs are picked up from the individual image sensor chips by sequentially applying shift clocks to selected image sensor chips so as to provide a continuous sensor output signal, whereby no noise is superimposed on the sensor output signal and the quality of images in the image reader, facsimile equipment, OCR equipment and the like can be improved.

Method of driving multiple chip CCD image sensor

A coordinate input apparatus which comprises a display unit having a display layer, and a protecting layer disposed on said display layer and having two-dimensionally arranged light guides for transmitting light from the display layer in the direction substantially perpendicular to the display layer, wherein a user designates a coordinate position on the display layer through the protecting layer.

Coordinate input apparatus

A time limiting function is incorporated in an information carrying medium such as IC card to check whether the current time traced constantly reaches a preset limit time. When the current time reaches the limit time, information to be protected and stored in a memory is erased. For convenience of the user possessing the information carry medium, a card holder is provided which can be connected to the information carrying medium to stop the time limiting function.

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Seto, Japan

Mitsunari Kano