Sony Corporation

Other

Canon Kabushiki Kaisha

Pioneer Electronic Corporation

Pioneer Video Corporation

Pioneer Display Products Corporation

Shinichiro Iimura

Hiroshi Ogawa

Shoei Kobayashi

Kazuo Kuroda

Toshio Suzuki

Yoshiyuki Akiyama

Akiyoshi Inoue

Minemasa Ota

Shouji Taniguchi

Tamotsu Yamagami

Nobuyoshi Kobayashi

Kazunari Fujii

Yukio Furukawa

Takahiro Akiyama

Sunao Aoki

Shimpei Matsuo

Tatsuya Hotogi

Nobuhiko Tsukahara

Kunihiko Miyake

Soichiro Suzuki

Ryuhei Shoji

In step S, the address generator generates address information composed of a sync signal which is recorded on an optical disc, address data and an error correction code for the address data, pre-encodes and supplies it to a modulator. At the same time, a carrier signal generator generates a carrier signal which is to carry the address information, and supplies it to the modulator. In step S, the modulator makes MSK modulation of the carrier signal supplied from the carrier signal generator on the basis of the pre-encoded address information supplied from the address generator, and supplies a resultant MSK modulation signal to a wobbling unit. In step S, the wobbling unit forms, on the optical disc, a spiral groove wobbled adaptively to the MSK modulation signal supplied from the modulator. In this optical disc, a given address can be accessed quickly and accurately.

Method of, and apparatus for, recording address information to disc medium

A light deflector device includes a light deflector having an oscillation system, a driving unit for driving the oscillation system and a drive controlling unit for supplying a drive signal. The oscillation system simultaneously generates a first oscillating motion of a first frequency and a second oscillating motion of a second frequency. The drive controlling unit supplies a drive signal formed by synthetically combining a first signal having the first frequency and a second signal having the second frequency to the driving unit and, at the same time, another drive signal for changing at least the amplitude of the first oscillating motion, the amplitude of second oscillating motion or the relative phase difference of the first oscillating motion and the second oscillating motion to the driving unit in order to correct an offset of scanning light deflected by the light deflector.

Light deflector device and image forming apparatus

Disclosed is an oscillator device that includes an oscillating system having a first oscillator, a second oscillator, a first torsion spring for connecting the first and second oscillators each other, and a second torsion spring being connected to the second oscillator and having a common torsional axis with the first torsion spring; a supporting system for supporting the oscillating system; a driving system for driving the oscillating system so that at least one of the first and second oscillators produces oscillation as can be expressed by an equation that contains a sum of a plurality of time functions; a signal producing system for producing an output signal corresponding to displacement of at least one of the first and second oscillators; and a drive control system for controlling the driving system on the basis of the output signal of the signal producing system so that at least one of amplitude and phase of the time function takes a predetermined value.

Oscillator device, optical deflecting device and method of controlling the same

There is provided an optical disc having preformed thereon a spiral wobbled track as a grove and/or land along with data is to be recorded. The track is wobbled for a series of predetermined signal units each composed of an FSK information bit part based on a waveform resulted from FSK modulation of information bit and a singe-frequency part based on a waveform of a single frequency. The FSK modulation uses two different frequencies of which the one is the same as the single frequency and the other is different from the single frequency. These different frequencies are in such a relation that each of them has an even number of wobbles and an odd number of wobbles alternately in a predetermined cycle.

Disc-shaped recording medium, cutting apparatus for same, and disc drive

Disclosed are an optical disk recording and reproducing apparatus, a remote controller, and a content management method capable of allowing a user to easily confirm contents recorded on an optical disk, wherein an optical disk is integrally provided with a read-only RFID tag that records only a disk ID to identify the optical disk as an individual. When a content is recorded on the optical disk, a video recorder records disk management information including the disk ID of the optical disk and index information about the content. After the content is recorded, a remote controller noncontactly reads the disk ID from the RFID tag of the optical disk and transmits the disk ID to the video recorder. The video recorder extracts index information corresponding to the received disk ID from the disk management information and displays the index information in a list.

Optical disk recording and reproducing apparatus, remote controller, and content management method

An optical reading unit which ensures that address information recorded as guide groove wobbles on an optical recording medium is easily played back. A light-receiving device () for detecting returning light from the optical recording medium has detection areas (A to D) delimited by a plurality of split lines (), (), and (). The position of one of the split lines functioning as a detection reference line is changed according to the position of a returning light spot S on a light-receiving surface () of the light-receiving device () and push-pull signals (PPto) are acquired by calculating the difference between signals received on two detection areas delimited by the split line to eliminate common-mode components.

Optical read device, information processing device using optical recording medium, and information reproduction method

A disk drive device capable of satisfactorily detecting address information recorded by land prepits even after data is recorded is provided. When address information recorded by land prepits is detected from a disk on which lands and grooves as recording tracks are formed and address information is recorded as land prepits on the lands, a window signal is generated by binarizing a push-pull signal (window generation circuit), the push-pull signal is integrated in a period based on the window signal (integration circuit), and the address information by the land prepits is extracted from the integrated signal (, and).

Disk drive device and address detection method with binarized push-pull signal

Method and apparatus for recording address information on disc medium

Disc-shaped recording medium, disc-state recording medium cutting apparatus, and disc drive apparatus

Growing community of inventors

Tokyo, Japan

Shinichiro Iimura