| Patent application number | Description | Published |
|---|
| 20080205235 | Optical-pickup-adjustment optical disk, method of adjusting optical pickup device, and method of producing optical pickup device - An optical-pickup-adjustment optical disk used for adjusting or producing an optical pickup device, includes a transparent protective substrate; and an optical-pickup-adjustment middle-depth information recording layer formed on a side of an inside surface of the transparent protective substrate, wherein the optical-pickup-adjustment middle-depth information recording layer is formed to have a middle depth which is a center of the maximum depth of the maximum-depth information recording layer prescribed by the optical disk standard and the minimum depth of the minimum-depth information recording layer prescribed by the optical disk standard. | 08-28-2008 |
| 20100085854 | OPTICAL DISC DISCRIMINATING METHOD AND OPTICAL DISC DISCRIMINATING APPARATUS - An optical disc discriminating method and an optical disc discriminating apparatus which can discriminate a type of optical disc with a simple configuration, causes a drive means to vary an incident angle of a laser light beam with respect to an optical disc while irradiating the optical disc with the laser light beam from a light beam generating section, causes a photodetector to detect a diffraction light of the laser light beam from a recording track of the optical disc, detects a value corresponding to the incident angle when the diffraction light is detected, and discriminates the type of the optical disc on the basis of the detected value. | 04-08-2010 |
| 20100097917 | DIFFRACTIVE OPTICAL ELEMENT AND OPTICAL PICKUP - An optical pickup with a simplified structure in which, according to the type of optical disc, diffracted light from three types of laser light can be directed efficiently onto a photodetector and appropriate focus control can be performed based on the signals detected by the photodetector, and a diffractive optical element that can be used in the optical pickup, which has a semiconductor laser | 04-22-2010 |
| 20100149936 | OPTICAL HEAD APPARATUS AND OPTICAL DISC APPARATUS - In an optical head apparatus and an optical disc apparatus which can reduce influence of interlayer stray light on a differential push-pull signal without making the configuration complicated, U | 06-17-2010 |
| 20110128832 | OPTICAL HEAD DEVICE AND OPTICAL DISC APPARATUS - An optical head device and an optical disc apparatus of a simple structure capable of canceling an offset in a tracking error signal caused when an objective lens shifts; in the optical head device, a polarizing hologram | 06-02-2011 |
| 20110211429 | OPTICAL PICKUP DEVICE AND OPTICAL DISC DEVICE - An optical pickup device includes a plurality of laser light sources emitting laser beams of different oscillation wavelengths, and a plurality of objective lenses on which the laser beams in the form of diverging beams emitted by the plurality of laser light sources are incident, and which directly focus the laser beams onto a recording surface of an optical disc. A rising mirror reflects a laser beam in the form of a diverging beam emitted by a laser light source of a predetermined oscillation wavelength among the plurality of laser light sources so as to lead the laser beam to one of the plurality of objective lenses, and transmits the laser beam in the form of a diverging beam emitted by the other laser light source. As the rising mirror transmits the laser beam in the form of the diverging beam emitted by said other laser light source, astigmatism is generated so as to correct existing astigmatism of the laser beam emitted by said other laser light source. | 09-01-2011 |
| 20110271291 | OPTICAL DISC DISCRIMINATION METHOD, OPTICAL DISC TRANSPORT DEVICE, OPTICAL DISC DEVICE, OPTICAL DISC INSPECTION DEVICE, AND OPTICAL PICKUP INSPECTION DEVICE - An optical disc device compatible with optical discs of different types having different track pitches, having a light detecting means ( | 11-03-2011 |
| Patent application number | Description | Published |
|---|
| 20090102427 | SELECTOR CIRCUIT - A selector circuit outputs one of a first input voltage or a second input voltage via an output terminal. A first transistor and a second transistor are provided in series between a first input terminal and the output terminal A third transistor and a fourth transistor are provided in series between a second input terminal and the output terminal. A control unit controls the ON/OFF operations of the first transistor through the fourth transistor. The back gates of the first transistor and the second transistor are connected such that at least one body diode of the first transistor M | 04-23-2009 |
| 20090108911 | ANALOG SWITCH - An analog signal is input to an input terminal. An analog signal is output via an output terminal. A first transistor is an N-channel MOSFET, and is provided between the input terminal and the output terminal. A first resistor is provided between the gate of the first transistor and a first fixed voltage terminal (power supply terminal), which sets the gate of the first transistor to a high-impedance state. | 04-30-2009 |
| 20100066336 | POWER CONTROL CIRCUIT - A control circuit | 03-18-2010 |
| 20110176248 | PROTECTION CIRCUIT - A first protection circuit includes a first diode and a first transistor. The anode of the first diode is connected to a terminal to be protected. The first transistor is configured as an N-channel MOSFET, and arranged such that the first terminal of the conduction channel thereof is connected to the cathode of the first diode, and the second terminal of the conduction channel thereof, and the gate and the back gate thereof are connected to a fixed voltage terminal. The first transistor is configured as a floating MOSFET formed within an N-type well formed in a P-type semiconductor substrate. The first diode is formed in the shared N-type well in which the first transistor is formed. The cathode of the first diode and the first terminal of the conduction channel of the first transistor are connected to the N-type well. | 07-21-2011 |
