Kabushiki Kaisha Nippon Conlux

Nippon Conlux Co., Ltd.

Nippon Hoso' Kyokai

Kabushiki Kaisha Nippon Coinco

Yasuyuki Kimura

Koichi Yamazaki

Kazuo Noda

Susumu Kojima

Osamu Yamada

Takeshi Ishida

Eiji Itako

Yonezo Furuya

Toru Kuroda

Akira Onodera

Satoru Tsurumaki

Seiji Takamatsu

Futoshi Houjo

Jun Yamada

Masaaki Tokiniwa

A coin processing device including: a material detection sensor including first and second coils facing each other with a coin passage interposed therebetween; an outer diameter detection sensor including ring-shaped third and fourth coils that surround the first and second coils, respectively; a first oscillation circuit connected to the material detection sensor that oscillates a first oscillation signal in an individual connection state and a series connected state and is connected to the material detection sensor and the outer diameter detection sensor; a second oscillation circuit connected to the outer diameter detection sensor that oscillates a second oscillation signal in the individual connection state; a switching unit that switches the individual connection state and the series connection state; a coin identification unit that detects an outer diameter of a coin using the second oscillation signal in the individual connection state or the first oscillation signal in the series connection state.

Coin processing device

A sheet recognizing device and method for precisely checking the authentication of a sheet by performing recognition of color and watermark of a sheet and detecting the subtle characteristic of a hue ink printed on one side of the sheet. The sheet recognizing device comprises first and third light sources for projecting light at predetermined angles to a sheet, a second light source for projecting light from a vertical direction, first and second light-receiving elements for receiving light at angles at which the hues of the hue ink printed area originated from the lights from the first and second light sources are different, a third light-receiving element opposed to the second light source with the sheet interposed therebetween, first computing means for computing a first color tone depending on the hue ink printed area on the basis of the light-reception outputs from the first light-receiving element due to the light from the first light source and from the second light-receiving element due to the light from the third light source, second computing means for computing a second color tone independent of the hue ink printed area on the basis of the light-reception outputs from the first light-receiving element due to the light from the second light source and from the third light-receiving element due to the light from the third light source, whereby the sheet is checked on the basis of the computation results by the first and second computing means.

Sheet recognizing device and method

There are provided a sheet paper identification device and method capable of preventing use of the device in an abnormal state by preventing erroneous identification caused by dust attached to an interior of a pickup section, detecting the abnormal state in the pickup section due to the dust, and notifying it outside. When a sheet paper is inserted from a sheet paper insert section (), the sheet paper is fed by a sheet paper feed section (). An image pickup section () images the interior of the image pickup section () before the sheet paper is fed to the image pickup section () so as to acquire image data without any sheet paper so as to acquire image data having the sheet paper. A dust detection section () calculates the position and the area of the image indicating dust of the image data having no sheet paper. When the image data having the sheet paper has an image of the same area at the same position as the image indicating the dust, the image is identified as an image indicating the dust attached to the interior of the image pickup section () in the image data including the sheet paper. If the dust identified is other than a predetermined one, an abnormal state of the image pickup section () is notified to a control section ().

Sheet paper identification device and method

A data recording method and device for an optical memory card which is adapted to prevent a recording error due to step-out during a data recording operation, and minimize a decrease in the recording capacity of an optical memory card. While data are recorded, an output from an SYNC mark detection circuit (,) and an output from an internal synchronization signal generation circuit (,) are compared with each other in a comparator circuit (,). When step-out occurs, a write signal generation circuit (,) is stopped and the data recording operation is interrupted, and a re-recording operation is started at a frame adjacent to the frame in which a recording error occurred, on the basis of the value in a write cycle counter, whereby a decrease in the recording capacity of the optical memory card is minimized.

Data recording method and device for optical memory card capable of stopping recording upon detection of synchronization error

An optical information recording and reproducing method and device, whereby it is possible to prevent reduction in information recording capacity of an optical card and increase in recording and reproduction time due to track jump operations, and there is no occurrence of track jumping errors due to oscillations associated with acceleration and deceleration of the relative speed of movement between the optical card and an optical head. A region where the optical head and optical card are moved at a constant speed relative to each other is provided in the acceleration or deceleration of the relative speed of movement, and a track jump operation is implemented in this region.

Track jump for optical information recording and reproducing method and device

A method and a device for recording data in an optical memory card which facilitate judgment between an unrecorded region and a recorded region in the optical memory card and which prevent double writing. Record pits are formed so that data to be recorded on the optical memory card is recorded in the same way as when recorded in the MFM-RZ modulation system. Data that was recorded in the NRZI-RZ modulation system is reproduced and the modified to record in the MFM-RZ modulation system. This method forms the record pits at least every two recording intervals or less in the recorded region in the optical memory card, making it possible to judge the unrecorded region of the optical memory card from the recorded region according to presence or absence of the record pits and thereby preventing double writing.

Method and device for recording data in an optical memory card

A card conveyance control method and apparatus that allow a card held by a plurality of conveying rollers to be conveyed and securely mounted at the proper position on a conveying platform. The conveying rollers of the first conveyer unit, which holds and conveys an optical card, are rotated in the conveying direction of the optical card, and the card conveying platform of the second conveyer unit is moved in the direction of the first conveyer unit so as to press the leading edge of the optical card conveyed from the first conveyer unit against the back edge of the conveying platform; the conveying platform of the second conveyer unit is then moved in the opposite direction from the first conveyer unit while the conveying rollers of the first conveyer unit are rotated in the conveying direction of the optical card; and this operation is repeated several times.

Card conveyance control method and apparatus

For recording or reproduction of information, the optical beam is moved relative to the recording medium along the longitudinal direction of a certain track. When accessing another track, the relative movement of the light beam along the longitudinal direction of the track is decelerated, and during this deceleration, the light beam is started to move in the direction transverse to the tracks toward the desired track. Thus, it is not necessary to wait for such time when the relative movement of the light beam along the longitudinal direction of the track has been completely stopped, and hence the necessary accessing time can substantially be reduced. If control is made to cause a decelerating rate of the relative movement to decrease continuously gradually or stepwise from a relatively high decelerating rate to a relatively low rate and the light beam is caused to start relatively moving toward the desired track while the relative movement is at the relatively low decelerating rate, it is allowed to effectively suppress occurrence of unwanted mechanical vibration due to abrupt deceleration of the relative movement.

Method and apparatus for accessing a target track on optical medium

In a tracking or focusing servo control loop, there are provided a switch element for switch-controlling a tracking or focusing error signal, and a smoothing circuit for switching passage the error signal. An amount of detected reflection from an optical recording medium is monitored by a controller section, and the switching action of the switch element is ON/OFF-controlled by the controller section so as to maintain a servo loop gain at a predetermined standard. Thus, it is possible to maintain a constant servo loop gain without being influenced by variation in the laser light amount or difference in reflectivity characteristics of the recording layers of individual optical recording media, and constantly stable tracking servo control and/or focusing servo control can be performed.

Optical recording and reproducing system using servo control, switches

In an optical information recording and reproducing apparatus, the recording operation is interrupted when an information pit, dust, scratch, stain, etc. is present on an optical recording medium. However, the recording operation is resumed and kept continued when a dust, scratch, stain, etc. other than the information pit is present on the medium. The apparatus comprises a double recording detecting circuit for detecting a pseudo double recording signal generated by a dust, scratch, stain, etc. on the medium at a period of a recording operation; and a recording signal supply circuit for interrupting the recording operation when the double recording detecting circuit detects the pseudo double recording signal to switch the recording period to a monitor period, for maintaining the interruption of the recording operation when a real double recording signal generated by an information pit is detected at the monitor period, and for resuming the recording operation when the real double recording signal generated by an information pit is not detected at the monitor period. After the recording operation has been resumed and further when the pseudo double recording signal generated by a dust, scratch, stain, etc. still remaining on the medium is detected, the monitor and recording periods are repeated alternately. However, after the medium has become free from a dust, scratch, stain, etc. finally and therefore the real and pseudo double recording signals are not both generated, the recording operation is kept continued normally.

Optical information recording and reproducing apparatus

An error correction coding and decoding circuit for digitally coded information in which a majority difference set cyclic code is used to apply error correction coding and decoding to a data signal having data bits suitably assigned to information bits and parity bits, characterized in that a clock signal (CLKC) for the internal operation of the circuit, a data load clock signal for loading data onto the circuit, and a data read clock signal for reading data from the circuit are delivered from an external circuit provided separately from the error correction coding and decoding circuit.

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Hiki-gun, Japan

Yasuyuki Kimura