Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Yoshihiro Kanda

Hiroyuki Yamaguchi

Takeharu Yamamoto

Mitsurou Moriya

Osamu Yamaguchi

Yoshihisa Fukushima

Masaru Odagiri

Takashi Kishimoto

Yoshihiro Mushika

Takashige Hiratsuka

Hiromichi Ishibashi

Mitsuro Moriya

Kenji Fujiune

Yuuichi Kuze

Rie Takahashi

Mitsuteru Fujimoto

Minoru Ochiai

Shinji Inoue

Dai Shintani

Kenichi Honjo

Hidenori Wada

Yusuke Adachi

Kanji Wakabayashi

Masahiro Inata

Daisuke Ogata

Shinichi Yamada

Shin-ichi Yamada

Tetsuya Shihara

Yasuki Matsumoto

Yoshihiro Ikawa

Katsuhiko Yasuda

Jun Kikuchi

Toshiyuki Kinou

Naoya Hotta

Mitsuru Sakai

The present image blurring correction device includes light field information generating portion, angle blurring amount detecting portion and correcting portion. The light field information generating portion generates a series of light field information corresponding to consecutive shooting images shot by a digital camera. The angle blurring amount detecting portion detects a blurring amount of the digital camera based on variation in the series of light field information. The correcting portion corrects the series of light field information in accordance with the blurring amount so as to suppress variation in the series of light field information.

Image blurring correction device

A drive unit includes an ultrasonic actuator, which has an actuator body formed using a piezoelectric element and outputs a driving force by vibration of the actuator body, and a control section which induces vibration in the actuator body by supplying a plurality of AC voltages to the piezoelectric element. The control section provides, in combination, phase control, which controls the driving force by adjusting a phase difference between a first and a second AC voltages, and wave-number control, which controls the driving force by adjusting the wave number included in a predetermined burst period in each AC voltage.

Drive unit, lens barrel, and camera

An imaging device disclosed herein is a device for acquiring image data about a subject, comprising an image acquisition section, a housing, a flash device, and a flash controller. The image acquisition section is configured to continuously acquire a plurality of image data from an optical image of a subject. The housing holds the image acquisition section. The flash device is configured to emit a flash of light, with which the emission angle of the flash light with respect to the housing can be varied. The flash controller is configured to control the flash device so that the emission angle of the flash light when the plurality of image data are being continuously acquired will differ for at least two image data out of the plurality of image data.

Imaging device

A phase error detection apparatus capable of performing offset correction of a tracking error signal accurately even when there is a defect or a non-recorded position on an optical disc. There are provided a phase difference detection circuit () which receives two sequences of digital signals, performs phase comparison using a distance between zerocross points of the two sequences of digital signals, and outputs a phase comparison result PCR and a phase comparison completion signal PCC, and an offset control circuit () which outputs an offset correction amount for each phase comparison completion signal PCC from the phase difference detection circuit (), and the offset correction amount &#x394;&#x3b1; is added to the phase comparison result PCR to avoid offset correction in a position where phase comparison is not carried out.

Phase error detection apparatus

An optical disc device including a high frequency band processing circuit for removing low frequency components of signals outputted from plural photodetectors of a pickup, and generating various kinds of signals required for recording/playback of an optical disc by digital processing after performing AD conversion by a high-speed low-bit AD converter; and a low frequency band processing circuit for removing high frequency components of the signals outputted from the respective photodetectors of the pickup, and generating various kinds of signals required for recording/playback of an optical disc by digital processing after performing AD conversion by a low-speed high-bit time-division AD converter.

Optical disc device

In a recordable data storage medium on which property data was recorded after having been modulated and on which data that is decodable by a cryptographic key to be generated from the property data was recorded, the property data was preferably modulated by a different method from that applied to a read-only data storage medium. Then, an optical disc drive, having no ability to distinguish the recordable data storage medium from the read-only data storage medium, cannot read the recordable data storage medium. Consequently, a greater number of drives should be equipped with the function of recognizing the type of a given data storage medium and the copyright protection function should be consolidated.

Optical disc drive

In a repetitive control device used for processing a servo signal, a memory () is used as a delay element for a filter (), and a filtering process by the filter () is carried out using a clock signal that is an integral multiple of an operation frequency of a driving signal. Therefore, the gain can be increased without generating phase rotation with respect to a compensated signal, and high followability can be achieved to fluctuations in the track position which are caused by the shape of a disc such as decentering or surface wobbling, during recording and playback in an optical disc device.

Repetitive control device and optical disc device

According to the present invention, a moving element such as an electrostatically driven actuator is displaced by supplying a drive signal thereto. Meanwhile, a displacement sensing section senses its displacement and a calibrating section automatically calibrates the correlation between the drive signal and the displacement, thereby compensating for a variation in the characteristic of the actuator with time and according to the environment. A switching section selectively connects the single displacement sensing section to a plurality of moving elements one after another, thereby cutting down the circuit for displacement sensing.

Microactuator with displacement sensing function and deformable mirror including the microactuator

An information playback apparatus comprises an input amplifier to which an RF signal reproduced from an optical disc is input; a high-pass filter to which the output of the input amplifier is input; an AD converter to which the output of the high-pass filter is input; a lag lead filter to which the output of the AD converter is input; and a demodulator for digitally processing the output of the lag lead filter to demodulate it as a binary signal. Thereby, an optical disc playback apparatus that realizes a DVD-RAM playback function at low cost can be realized.

Information playback apparatus, in-line circuit, and method for implementing in-line circuit on information playback apparatus

A laser power control circuit that is constituted by CMOS transistors reduces variations in a laser power that is emitted from a semiconductor laser, which are caused by a mismatch of the transistors. An offset amount of a differential amplifier is digitally calculated using an A/D converter that is located on the same chip, and a voltage value of a variable voltage source is controlled for applying a voltage in a direction opposite to the offset voltage of the differential amplifier to correct the offset voltage of the laser power control circuit, thereby reducing the variations in the laser power emitted from the semiconductor laser.

Laser power control circuit

To greatly increase the storage density of a storage apparatus, an electron beam E emitted from a cold cathodeis accelerated by an accelerating electrode, caused to converge by a convergence electrode, deflected by a deflection electrodeand applied to a minute region of a storage film. The storage filmincludes, for example, a phase change film. The film is rapidly heated and cooled to change into an amorphous state upon irradiation with an electron beam E with high energy, while being gradually cooled to change into a crystallized state upon irradiation with an electron beam E with approximately intermediate energy, thereby storing data. Upon irradiation with an electron beam E with low energy, the potential difference between a detection electrodeand an anodeis detected depending on the state, i.e., the amorphous or crystallized state, thereby reading stored data.

Information storage apparatus storing and reading information by irradiating a storage medium with electron beam

According to the present invention, a moving element Ai such as an electrostatically driven actuator is displaced by supplying a drive signal thereto. Meanwhile, a displacement sensing sectionsenses its displacement and a calibrating sectionautomatically calibrates the correlation between the drive signal and the displacement, thereby compensating for a variation in the characteristic of the actuator with time and according to the environment. A switching sectionselectively connects the single displacement sensing section to a plurality of moving elements Ai one after another, thereby cutting down the circuit for displacement sensing.

A servo error signal generation circuit comprises a first sampling unit for sampling first detection signals at first sampling timings, a second sampling unit for sampling second detection signals at second sampling timings which are obtained by periodically thinning out the first sampling timings, an AD converter for analog-to-digital converting the data sampled by the first and second sampling units, and a completion unit for completing the sampling date of the timings which have been thinned out by the sub sampling timing generator, for the data which have been sampled by the second sampling unit and outputted from the AD converter.

Servo error signal generation circuit and servo error signal generation method

A tracking error detection apparatus comprises a phase difference detection circuit for receiving two sequences of digital signals, and performing phase comparison using a distance between zerocross points of the two sequences of digital signals to output a result of phase comparison, and an LPF for generating a tracking error signal from the result of phase comparison. The phase difference detection circuit does not carry out phase composition in a position that is not appropriate as a target position to perform phase comparison, and outputs the result of phase comparison as a pulse signal corresponding to one sampling clock. Therefore, even when a disc is played at CAV or a flaw or the like exists on the disc, an accurate tracking error signal can be detected.

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Osaka, Japan

Yoshihiro Kanda