Pioneer Corporation

Pioneer Electronic Corporation

Pioneer Electric Corporation

Takanori Maeda

Ikuya Kikuchi

Yoshitsugu Araki

Hajime Koyanagi

Kiyoshi Tateishi

Atsushi Onoe

Mitsuru Sato

Seiichi Ohsawa

Noriaki Murao

Eiji Muramatsu

Masayuki Iwasaki

Makoto Sato

Takayuki Nomoto

Katsuhiro Koike

Hirokazu Takahashi

Susumu Nomura

Kenjiro Fujimoto

Masahiro Ishimori

Jun Suzuki

Hiroyuki Ota

Fumitaka Kotaka

Tomotaka Yabe

Shuntaro Mori

Hideki Kobayashi

Hiroki Kuribayashi

Takuma Yanagisawa

Junichi Furukawa

Toru Akiyama

Kazuo Takahashi

Hiroshi Nishiwaki

Kenjiro Hamanaka

Toshiharu Ezuka

Takahito Ono

A capacitance detecting apparatus which can detect the change in minute capacitance of a measuring object with high sensitivity comprises a signal generator, a differential amplifying circuit, and a detecting unit. The signal generator generates a probe signal w(t) to be applied to one end of the measuring object. The differential amplifying circuit amplifies differentially a response signal v() developed at the other end of the measuring object in response to the application of the probe signal w(t) and the probe signal w(t). The detecting unit detects capacitance change of the measuring object based on the amplified signal v(t) from the differential amplifying circuit.

Capacitance detecting apparatus

A physical properties detection device comprising a probe to be placed near or touching a surface of a ferroelectric; an oscillation loop including the probe and capacitance within the ferroelectric; and detection means for detecting a physical properties of the ferroelectric on the basis of a frequency variation of a measurement signal generated in the oscillation loop, the frequency variation accompanying application of an alternating electric field to the ferroelectric; and the physical properties detection device is further comprising frequency conversion means for converting the frequency of the measurement signal to a low frequency and outputting the resulting signal as a converted measurement signal; frequency control means for controlling the frequency of the converted measurement signal so as to match a target frequency; frequency detection means for generating a frequency detection signal that has a signal level corresponding to the frequency of the converted measurement signal; and synchronous detection means for synchronously detecting the frequency detection signal on the basis of a synchronization signal.

Physical properties detection device and physical properties detection method

A recording/reproducing apparatus () is provided with: a first substrate () on which a recording medium () is mounted; and a second substrate () to which a recording/reproducing head (), which performs information recording and information reproduction on the recording/reproducing medium is fixed, wherein the second substrate is relatively displaced in a predetermined direction substantially parallel to the first substrate with respect to the first substrate, a particulate () is placed in a gap between the first substrate and the second substrate, the particulate can be displaced with displacement of the second substrate, the particulate has a substantially circular cross section in a direction that the second substrate is displaced when the second substrate is displaced.

Recording/reproducing apparatus

A driving apparatus () is provided with: a fixed part () having a fixed-part plane (); and a driven part () having a driven-part plane (), which faces the fixed-part plane, and driven in a direction substantially parallel to the fixed-part plane, a liquid lubricant () is between the fixed-portion plane and the driven-part plane, the driven-part plane faces the fixed-part plane such that the driven-part plane is substantially parallel to the fixed-part plane.

Driving apparatus and recording/reproducing apparatus

A driving apparatus is provided with: a stage structure on which a medium having a small recording domain is mounted; and a facing structure which is provided with at least one small action structure, which faces the medium, for performing a predetermined action to the medium, and which is displaced relatively on a predetermined flat surface with respect to the stage structure, the facing structure comprising a facing-side position detecting unit for detecting a relative reference position of the facing structure with respect to the stage structure, the stage structure comprising a stage-side position detecting unit for detecting a relative reference position of the facing structure with respect to the stage structure.

Driving apparatus

An information recording/reproducing device is provided with a recording medium with a recording surface, a plurality of probes that carry out at least either record processing or reproduction processing by scanning a plurality of information tracks on the recording surface, a position detecting means that detects a position of at least one information track by using the probe for every plural divided regions into which the recording medium is divided in a direction intersecting the plural information tracks and which contain at least one information track, and a track control means that controls tracking of the probe used for at least either record processing or reproduction processing for every plural divided regions. Thus, the device structure can be simplified.

Information recording/reproducing apparatus and method using a plurality of probes

A probe group is composed of, for instance, four probes adjacently arranged, and one modulation circuit is arranged for each probe group. At the time of recoding information, a changeover switch connects one of the four probes with the modulation circuit, and subsequently changes the probes to be connected with the modulation circuit while reciprocal movement of a recording medium is being controlled.

Information recording/reproducing apparatus

An actuator comprises a connection section having one end rotatably connected to a connection point (C) of a fixed section and the other end rotatably connected to a connection point (C) of a moving section, a connection section having one end rotatably connected to a connection point (C) of the fixed section and the other end rotatably connected to a connection point (C) of the moving sections a comb-teeth electrode having the root section connected to a comb-teeth base point (B) and the fore-end section extending along the turning path, and a comb-teeth electrode having the root section connected to the fixed section and the other section extending along the curve of the comb-teeth electrode and opposed to the comb-teeth electrode with a predetermined gap.

Actuator using comb-tooth

A first thermal buffer layer and a second thermal buffer layer are arranged between a recording medium and an actuator structure. The heat conductivity of the first thermal buffer layer is set low and the heat conductivity of the second thermal buffer layer is set high. Most of the heat generated from a coil wiring of the actuator structure is blocked by the first thermal buffer layer, and heat leaked from the first thermal buffer layer is diffused by the second thermal buffer layer. Temperature distribution on the recording medium is made uniform, and thus, a configuration wherein the recording medium and the actuator structure are placed one over another can be provided, information reading accuracy or information recording stability can be improved and the sizes of an information storage device can be reduced.

Information memory apparatus using probe

In a two-dimensional probe array, an interval between the leading ends of probes adjacent to each other in an X direction is made shorter than that between the leading ends of probes adjacent to each other in a Y direction. Thus, the leading ends of the probes are arranged to form a lattice wherein many rectangles are arranged. Furthermore, the lowest resonance frequency of an actuator which moves a recording medium in the X direction is set higher than the lowest resonance frequency of an actuator which moves the recording medium in the Y direction. At the time of recording or reading information, the recording medium is reciprocated in the X direction at a frequency substantially equal to the lowest resonance frequency of the actuator.

A recording/reproducing apparatus () is provided with comprising: recording devices (-) for recording record signals (WS-WS) in parallel and in synchronization with a record clock; a signal generating device () for generating record signals such that a reproduction clock synchronized with the record clock can be generated on the basis of the reproduced record signals, if the plurality of record signals are reproduced in parallel; reproducing devices (-) for reproducing the record signals in parallel; and a clock generating device () for generating a reproduction clock.

Signal generating apparatus and method, recording apparatus and method, reproducing apparatus and method, recording/reproducing apparatus and method, computer program, and recording medium

A signal processing circuit is provided with a signal input layer having a plurality of signal input sections which receive signal input; a plurality of signal processing layers whereupon a plurality of signal processing sections, which are arranged corresponding to each of the signal input sections and processes in parallel signals from the signal input sections, are dispersed; and connecting lines for associating and connecting the signal input sections with the signal processing sections, respectively. The size of a region occupied by each of the signal processing sections on the signal processing layers is larger than the arrangement intervals between the signal input sections on the signal input layers.

Signal processing circuit and reproducing apparatus

A probe () is provided with: a substrate () having a surface facing a medium (); and a point electrode (), formed in the substrate, for performing at least one of detection operation of a state of a domain of the medium and change operation of the state of the domain of the medium, a tip portion, which is an edge portion on a side facing the medium, out of the point electrode being disposed in one point in a plane which is formed in a vicinity of an area portion in which the point electrode is formed by the surface.

Probe, recording apparatus, reproducing apparatus, and recording/reproducing apparatus

A position control area (A) is partly formed in the recording area () of a recording medium () and position information is recorded only in the position control area (A). To record data in the recording medium () by a head () having a plurality of cantilevers (A), (B), . . . , the position information is read by the cantilever (E) corresponding to the position control area (A) and, based on the position information, the positioning control or moving control of all the other cantilevers is performed.

Data recording and reproducing device, data recording and reproducing method, and recording medium

A multi-layer-information-recording medium is applied to an information recording and reproducing apparatus capable of recording or reproducing information on and from either of a single-layer-information-recording medium having a single recording layer on one side, and a multi-layer-information-recording layer having a plurality of recording layers layered on a spacer layer on one side as a change in reflectivity by irradiating a light beam. The multi-layer-information-recording medium is compatible in terms of at least reproducing and recording with a single-layer-information-recording medium having a cover layer having a predetermined refractive index 'n' and a thickness 't' disposed on a recording layer on a light incident side surface. The multi-layer-information-recording medium includes a deepest recording layer deepest from the light incident side surface. The deepest recording layer is formed at an optical distance dfrom the light incident side surface satisfying an equation d=nt. The multi-layer-information-recording medium also includes at least one shallow recording layer formed at an optical distance dsatisfying an inequality d&#x3c;nt from the light incident side surface.

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Tsurugashima, Japan

Takanori Maeda