Patent application number | Description | Published |
20100027573 | METHOD OF DRIVING A LASER DIODE - An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration is provided. In a method of driving a laser diode, the laser diode is driven by a pulse current which is 10 or more times higher than a threshold current value. The width of the pulse current is preferably 10 nanoseconds or less, and the value of the pulse current is specifically 0.4 amperes or over. | 02-04-2010 |
20100246622 | BI-SECTION SEMICONDUCTOR LASER DEVICE, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR DRIVING THE SAME - A method for manufacturing a bi-section semiconductor laser device includes the steps of (A) forming a stacked structure obtained by stacking, on a substrate in sequence, a first compound semiconductor layer of a first conductivity type, a compound semiconductor layer that constitutes a light-emitting region and a saturable absorption region, and a second compound semiconductor layer of a second conductivity type; (B) forming a belt-shaped second electrode on the second compound semiconductor layer; (C) forming a ridge structure by etching at least part of the second compound semiconductor layer using the second electrode as an etching mask; and (D) forming a resist layer for forming a separating groove in the second electrode and then forming the separating groove in the second electrode by wet etching so that the separating groove separates the second electrode into a first portion and a second portion. | 09-30-2010 |
20110063384 | LIQUID CONTAINER AND IMAGE FORMING APPARATUS - A disclosed liquid container containing liquid to be supplied to a liquid discharge head includes a container main body defining a liquid containing section and including an opening section formed in one surface of the container main body, the opening section including an opening; and a film-like flexible member sealing the opening section of the container main body. Further, the film-like flexible member is joined with a joint section formed on the opening section of the container main body in a state where the film-like flexible member is bent, and a concave-convex structure is formed in the circumferential direction of the joint section. | 03-17-2011 |
20110103419 | OPTICAL DEVICE - The present invention provides an optical device capable of suppressing a drive current and an optical output to be varied with a passage of the time. The optical device includes: an optical element including a first end face and a second end face, and emitting light having a wavelength from 300 nm to 600 nm both inclusive at least from the second end face in the first end face and the second end face; a pedestal including a supporting substrate supporting the optical element, and a connecting terminal electrically connected to the optical element; and a sealing section including a light transmitting window in each of a portion facing the first end face and a portion facing the second end face, and sealing the optical element. | 05-05-2011 |
20110164632 | METHOD OF DRIVING A LASER DIODE - An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration. The laser diode can be driven by a pulse current which is 10 or more times higher than a threshold current value. The width of the pulse current is preferably 10 nanoseconds or less, and the value of the pulse current is specifically 0.4 amperes or over. | 07-07-2011 |
20110216788 | MODE-LOCKED SEMICONDUCTOR LASER DEVICE AND DRIVING METHOD THEREOF - Provided is a driving method of a mode-locked semiconductor laser device comprising a laminated structure in which a first compound semiconductor layer, a third compound semiconductor layer having an emission region and a second compound semiconductor layer are successively laminated, a second electrode, and a first electrode. The laminated structure is formed on a compound semiconductor substrate having polarity, the third compound semiconductor layer includes a quantum well structure having a well layer and a barrier layer. The well layer has a depth of 1 nm or more and 10 nm or less. The barrier layer has an impurity doping density of 2×10 | 09-08-2011 |
20110216797 | SELF-OSCILLATING SEMICONDUCTOR LASER DEVICE AND DRIVING METHOD THEREOF - There is provided a driving method of a self-oscillating semiconductor laser device including a first compound semiconductor layer having a first conductive type and composed of a GaN base compound semiconductor, a third compound semiconductor layer and a second compound semiconductor layer configuring an emission region and a saturable absorption region, are successively laminated, a second electrode formed on the second compound semiconductor layer, and a first electrode electrically connected to the first compound semiconductor layer. The second electrode is separated into a first portion to create a forward bias state by passing current to the first electrode via the emission region and a second portion to apply an electric field to the saturable absorption region by a separation groove. The current greater than a current value where kink is occurred in optical output-current characteristics is to be passed to the first portion of the second electrode. | 09-08-2011 |
20110234744 | LIGHT OSCILLATION DEVICE AND RECORDING DEVICE - A light oscillation device has a self oscillation semiconductor laser that has a double quantum well separated confinement heterostructure made of GaInN/GaN/AlGaN materials and that includes a saturable absorber section which is applied with a negative bias voltage and a gain section into which a gain current is injected, a light separation unit that separates a portion of laser light beams from the self oscillation semiconductor laser, a light sensing element that senses the laser light beams separated by the light separation unit, and a current control circuit which controls a current injected into the gain section of the self oscillation semiconductor laser based on an amount of the laser light beams which are sensed by the light sensing element. | 09-29-2011 |
20120002271 | SEMICONDUCTOR OPTICAL AMPLIFIER - A semiconductor optical amplifier includes: a laminated structure sequentially including a first compound semiconductor layer composed of GaN compound semiconductor and having a first conductivity type, a third compound semiconductor layer having a light amplification region composed of GaN compound semiconductor, and a second compound semiconductor layer composed of GaN compound semiconductor and having a second conductivity type; a second electrode formed on the second compound semiconductor layer; and a first electrode electrically connected to the first compound semiconductor layer. The laminated structure has a ridge stripe structure. When widths of the ridge stripe structure in a light output end face and the ridge stripe structure in a light incident end face are respectively W | 01-05-2012 |
20120002690 | METHOD OF DRIVING A LASER DIODE - An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration is provided. In a method of driving a laser diode, the laser diode is driven by a pulse current which is 10 or more times higher than a threshold current value. The width of the pulse current is preferably 10 nanoseconds or less, and the value of the pulse current is specifically 0.4 amperes or over. | 01-05-2012 |
20120002695 | METHOD OF DRIVING A LASER DIODE - An ultrashort pulse/ultra-high power laser diode with a simple structure and configuration is provided. In a method of driving a laser diode, the laser diode is driven by a pulse current which is 10 or more times higher than a threshold current value. The width of the pulse current is preferably 10 nanoseconds or less, and the value of the pulse current is specifically 0.4 amperes or over. | 01-05-2012 |
20120044793 | RECORDING DEVICE AND OPTICAL OSCILLATOR DEVICE - A recording device that records information in an optical recording medium includes: a self excited oscillation semiconductor laser including a saturable absorber section to apply a bias voltage and a gain section to inject a gain current, and also emitting a laser light to record the information in the optical recording medium; a reference signal generation unit generating a master clock signal and also supplying an injection signal synchronized with the master clock signal to the gain section of the self excited oscillation semiconductor laser; and a recording signal generation unit generating a recording signal based upon the master clock signal and also applying the recording signal to the saturable absorber section of the self excited oscillation semiconductor laser as the bias voltage. | 02-23-2012 |
20120147917 | LASER DIODE DEVICE - A laser diode device includes a laminated structure in which a first compound semiconductor layer, a third compound semiconductor layer that has a light emitting region and a saturable absorption region, and a second compound semiconductor layer are sequentially layered, a second electrode, and a first electrode. The laminated structure has ridge stripe structure. The second electrode is separated into a first section to obtain forward bias state by applying a direct current to the first electrode through the light emitting region and a second section to add electric field to the saturable absorption region by an isolation trench. When minimum width of the ridge stripe structure is W | 06-14-2012 |
20120201259 | SUBMOUNT, SUBMOUNT ASSEMBLY, AND SUBMOUNT ASSEMBLING METHOD - A submount having a structure and a configuration resistant to an increase in manufacturing cost and a reduction in yields or reliability, and including an oblique waveguide is provided. A submount having a first surface and allowing a semiconductor light-emitting element including a waveguide to be fixed on the first surface, the waveguide having an axis line inclined at θ | 08-09-2012 |
20120236886 | LASER DIODE ELEMENT ASSEMBLY AND METHOD OF DRIVING THE SAME - A laser diode element assembly includes: a laser diode element; and a light reflector, in which the laser diode element includes (a) a laminate structure body configured by laminating, in order, a first compound semiconductor layer of a first conductivity type made of a GaN-based compound semiconductor, a third compound semiconductor layer made of a GaN-based compound semiconductor and including a light emission region, and a second compound semiconductor layer of a second conductivity type made of a GaN-based compound semiconductor, the second conductivity type being different from the first conductivity type, (b) a second electrode formed on the second compound semiconductor layer, and (c) a first electrode electrically connected to the first compound semiconductor layer, the laminate structure body includes a ridge stripe structure, and a minimum width W | 09-20-2012 |
20120281726 | BI-SECTION SEMICONDUCTOR LASER DEVICE, METHOD FOR MANUFACTURING THE SAME, AND METHOD FOR DRIVING THE SAME - A method for manufacturing a bi-section semiconductor laser device includes the steps of (A) forming a stacked structure obtained by stacking, on a substrate in sequence, a first compound semiconductor layer of a first conductivity type, a compound semiconductor layer that constitutes a light-emitting region and a saturable absorption region, and a second compound semiconductor layer of a second conductivity type; (B) forming a belt-shaped second electrode on the second compound semiconductor layer; (C) forming a ridge structure by etching at least part of the second compound semiconductor layer using the second electrode as an etching mask; and (D) forming a resist layer for forming a separating groove in the second electrode and then forming the separating groove in the second electrode by wet etching so that the separating groove separates the second electrode into a first portion and a second portion. | 11-08-2012 |
20130021891 | OPTICAL OSCILLATION DEVICE AND RECORDING APPARATUS - Provided is a recording apparatus including a self-excited oscillation semiconductor laser that has a double quantum well separate confinement heterostructure and includes a saturable absorber section to which a negative bias voltage is applied and a gain section into which a gain current is injected, an optical separation unit, an objective lens, a light reception element, a pulse detection unit, a reference signal generation unit, a phase comparison unit, a recording signal generation unit, and a control unit. | 01-24-2013 |
20130075772 | LIGHT-EMITTING DEVICE AND METHOD OF MANUFACTURING THE SAME - Provided is a light-emitting device including (a) a layer structure obtained by sequentially growing on a base substrate a first compound semiconductor layer of a first conductivity type, (b) an active layer formed of a compound semiconductor, and (c) a second compound semiconductor layer of a second conductivity type; a second electrode formed on the second compound semiconductor layer; and a first electrode electrically connected to the first compound semiconductor layer. The layer structure formed of at least a part of the second compound semiconductor layer in a thickness direction of the second compound semiconductor layer. The first compound semiconductor layer has a thickness greater than 0.6 μm. A high-refractive index layer formed of a compound semiconductor material having a refractive index higher than a refractive index of a compound semiconductor material of the first compound semiconductor layer is formed in the first compound semiconductor layer. | 03-28-2013 |
20130100789 | RECORDING DEVICE AND OPTICAL OSCILLATOR DEVICE - A recording device that records information in an optical recording medium includes: a self excited oscillation semiconductor laser including a saturable absorber section to apply a bias voltage and a gain section to inject a gain current, and also emitting a laser light to record the information in the optical recording medium; a reference signal generation unit generating a master clock signal and also supplying an injection signal synchronized with the master clock signal to the gain section of the self excited oscillation semiconductor laser; and a recording signal generation unit generating a recording signal based upon the master clock signal and also applying the recording signal to the saturable absorber section of the self excited oscillation semiconductor laser as the bias voltage. | 04-25-2013 |
20130336349 | SEMICONDUCTOR LASER DEVICE - A bi-section type GaN-based semiconductor laser device that has a configuration and a structure in which damage is less likely to be caused in a region in a saturable absorption region that faces a first light emission region is provided. The semiconductor laser device includes a first light emission region, a second light emission region, a saturable absorption region sandwiched by the foregoing light emission regions, a first electrode, and a second electrode. Laser light is emitted from an end face on a second light emission region side thereof. The second electrode is configured of a first portion, a second portion, and a third portion. 112-19-2013 | |
20140108783 | VIRTUAL NETWORK BUILDING SYSTEM, VIRTUAL NETWORK BUILDING METHOD, SMALL TERMINAL, AND AUTHENTICATION SERVER - A virtual network building system includes a small terminal and an authentication server. The small terminal includes an identifier transmission unit automatically transmitting an identifier to the authentication server via a client terminal in a state in which a connection unit is connected to the client terminal, and is attachable to and detachable from the client terminal. The authentication server includes an authentication unit performing authentication on the basis of the identifier of the small terminal, a distribution unit distributing software for encrypting communication to the client terminal according to selected communication protocol and encryption method, a reception unit receiving information (access request information) regarding a request for access to the target apparatus, which is automatically transmitted from the distributed software, and a redirect unit making a proxy response of access of the client terminal to the target apparatus in response to the received access request information. | 04-17-2014 |
20140307750 | SEMICONDUCTOR LASER APPARATUS ASSEMBLY - A semiconductor laser apparatus is provided. The semiconductor laser apparatus includes a mode-locked semiconductor laser device and an external resonator including a dispersion compensation system, wherein the semiconductor laser apparatus is configured to generate self modulation, to introduce a negative group velocity dispersion into the external resonator, and to provide spectral filtering after the external resonator. | 10-16-2014 |
20150043603 | LIGHT-EMITTING DEVICE AND METHOD OF MANUFACTURING THE SAME - Provided is a high-output light-emitting device capable of emitting a light beam in a single mode. The light-emitting device includes a laminate structure body configured by laminating, in order, a first compound semiconductor layer, an active layer, and a second compound semiconductor layer on a base substrate, a second electrode, and a first electrode. The first compound semiconductor layer has a laminate structure including a first cladding layer and a first light guide layer in order from the base substrate, and the laminate structure body has a ridge stripe structure configured of the second compound semiconductor layer, the active layer, and a portion in a thickness direction of the first light guide layer. Provided that a thickness of the first light guide layer is t | 02-12-2015 |
20150085891 | SEMICONDUCTOR LASER DEVICE ASSEMBLY - A semiconductor laser device assembly includes (A) a semiconductor laser element and (B) a diffraction grating that configures an external resonator, returns diffraction light other than zero-th order diffraction light to the semiconductor laser element, and outputs the zero-th order diffraction light to the outside. An extension direction of a diffraction surface of the diffraction grating and a main vibration direction of a field of a laser beam incident on the diffraction grating are substantially parallel to each other. | 03-26-2015 |
20150131425 | OPTICAL OSCILLATION DEVICE AND RECORDING APPARATUS - Provided is a recording apparatus including a self-excited oscillation semiconductor laser that has a double quantum well separate confinement heterostructure and includes a saturable absorber section to which a negative bias voltage is applied and a gain section into which a gain current is injected, an optical separation unit, an objective lens, a light reception element, a pulse detection unit, a reference signal generation unit, a phase comparison unit, a recording signal generation unit, and a control unit. | 05-14-2015 |
20150236474 | SEMICONDUCTOR LASER DEVICE ASSEMBLY - Disclosed is a semiconductor laser device assembly including a semiconductor laser device; and a dispersion compensation optical system, where a laser light exited from the semiconductor laser device is incident and exits to control a group velocity dispersion value of the laser light exited from the semiconductor laser device per wavelength. | 08-20-2015 |
Patent application number | Description | Published |
20090109608 | ELECTRONIC APPARATUS - According to one embodiment, an electronic apparatus includes a housing, a main circuit board contained in the housing, a memory controller mounted on the main circuit board, only one memory slot mounted on the main circuit board, and only one memory module attached to the memory slot. The memory controller is of a specification that allows the memory controller to access-control up to one memory slot to which a memory module is attached in addition to an on-board memory which is to be directly mounted on the main circuit board. No on-board memory is mounted on the main circuit board, only the memory module is mounted as a memory on the main circuit board. Access control of the memory module is executed by the memory controller. | 04-30-2009 |
20100156908 | INFORMATION PROCESSING APPARATUS AND POWER SAVING EFFECT DISPLAY METHOD - According to an aspect of the present invention, there is provided an information processing apparatus that is operable in a first operation state and a second operation state, the apparatus including: a history storage unit configured to accumulate: a power usage reduction that is calculated based on a power usage difference between the first operation state and the second operation state; and an acquisition time at which the power usage reduction is acquired; an adding-up unit configured to add up values of the power usage reduction for a given period thereby calculating a power usage reduction amount; and an image generation unit configured to generate an image indicating a difference between the power usage reduction amount and a target value therefor and to display the image on a display device. | 06-24-2010 |
20110187753 | INFORMATION PROCESSING APPARATUS AND METHOD FOR CONTROLLING CHARGING OF BATTERY - According to one embodiment, an information processing apparatus includes a first battery, a second battery whose capacity is smaller than capacity of the first battery, a solar battery, a charging circuit, an illumination sensor and a controller. The charging circuit is configured to charge the second battery with power output from the solar battery. The controller is configured to control the charging circuit in accordance with a sensing result of the illumination sensor. | 08-04-2011 |
20110249400 | ELECTRONIC APPARATUS - According to one embodiment, an electronic apparatus includes a printed circuit board, a heat pipe, a fan unit and a fixing unit. The heat pipe has a first end physically fixed to and thermally connected to a first circuit component, and a second end opposite to the first end. The fan unit is provided in the vicinity of the second end of the heat pipe, and cools the second end. The fixing unit fixes the position of the heat pipe at a position different from the position of the first circuit component. | 10-13-2011 |
20110314267 | ELECTRONIC DEVICE AND COMPUTER PROGRAM PRODUCT - According to one embodiment, an electronic device includes a display module, a power button, at least one function button, a hardware controller, and a pre-OS boot processor. The display module displays display data processed by an application on an operating system (OS) or display data based on received broadcast waves. The power button is operated to power on or off the electronic device. The function button is provided separately from a hardware keyboard having a plurality of keys to control a function defined on the OS. The hardware controller is activated in response to power-on operation made on the power button and provide the OS with basic input/output mechanism with respect to hardware including the function button. The pre-OS boot processor performs a process before boot-up of the OS if a predetermined operation is made on the function button within a predetermined time since the power-on operation is made. | 12-22-2011 |
20120243179 | ELECTRONIC APPARATUS - According to one embodiment, an electronic apparatus includes a printed circuit board, a heat pipe, a fan unit and a fixing unit. The heat pipe has a first end physically fixed to and thermally connected to a first circuit component, and a second end opposite to the first end. The fan unit is provided in the vicinity of the second end of the heat pipe, and cools the second end. The fixing unit fixes the position of the heat pipe at a position different from the position of the first circuit component. | 09-27-2012 |
20130058513 | TELEVISION AND ELECTRONIC DEVICE - According to at least one embodiment, a television includes a housing further including a pair of corner portions and an enclosed space on an inner side thereof, a pair of speaker boxes housed in the enclosed space in vicinities of the corner portions, a pair of speakers housed in the speaker boxes respectively in a direction which crosses a thickness direction of the housing, and each of the speaker boxes further includes a first duct to guide sounds from a first side of the respective speaker to the respective first opening portion and a second duct to guide sounds from a second side of the respective speaker towards the enclosed space. | 03-07-2013 |
Patent application number | Description | Published |
20110197857 | FUEL INJECTION DEVICE - [Object] To ensure that the flow rate required during high-speed operation can be adequately provided in a fuel injection device for injecting/supplying fuel to an engine. | 08-18-2011 |
20110197858 | FUEL INJECTION DEVICE - [Object] To allow smooth discharge of a gas accumulated in a fuel injection device for injecting/supplying fuel to an engine intake passage. | 08-18-2011 |
20120055450 | STARTING DEVICE AND CARBURETOR USING SAME - A starting device for feeding a quantity of fuel from the fixed-quantity fuel chamber to an intake passage during start-up having a manually operated primary pump for suctioning/pumping fuel and arranged on a fuel introduction path connected along a fuel-feeding path; and a fixed-quantity fuel chamber for temporarily storing fuel delivered from the primary pump. An internal wall of the fixed-quantity fuel chamber undergoes elastic displacement, allowing its internal capacity to expand/shrink within a predetermined range; the fixed-quantity fuel chamber is connected to a fuel delivery path that communicates with the intake passage side and has a manually operated open/close valve; the valve is opened in a state in which, due to the primary pump being operated, the fixed-quantity fuel chamber is filled with a predetermined quantity of fuel while enlarging its internal capacity, whereby it shrinks due to an elastic contraction force and the fuel. | 03-08-2012 |
20140360472 | FUEL INJECTION DEVICE - A fuel injection device for smooth discharge of a gas accumulated therein comprising a fuel pump, a solenoid valve for injecting pressurized fuel into the intake passage of an engine, a high-pressure fuel passage extending from the fuel pump to the solenoid valve and has a medially positioned constant-pressure chamber, and a fuel return passage connected to a fuel return pipe, with the fuel return passage extending from the constant-pressure chamber and having a medially positioned priming pump. The constant-pressure chamber is configured with the top wall in the upper space thereof disposed above the opening of the high-pressure fuel passage opposite the solenoid valve, the fuel return passage opens into the upper space at a position above the opening of the high-pressure fuel passage, and the gas accumulating in the constant-pressure chamber is discharged from the upper space toward the fuel tank via the fuel return passage. | 12-11-2014 |
20150128914 | FUEL INJECTION DEVICE - A fuel injection device comprising electricity-generating means generating electricity by rotation of an engine and outputting a predetermined signal, and a solenoid valve injecting fuel; the valve being opened as a result of a drive current applied to a coil, and the fuel being injected into an intake passage of the engine at a predetermined timing during the rotation of the engine; to ensure that the flow rate required during high-speed operation ca be adequately provided in a fuel injection device for injecting/supplying fuel to an engine. The electricity-generating means is an alternating current generation means attached to the engine in a crank angle position at which an output is generated in synchronization with the intake timing of the engine; the signal is an injection command signal applied to the solenoid valve as an alternating-current drive current; and the applied voltage increases with increased engine speed. | 05-14-2015 |
20150322907 | FUEL INJECTION DEVICE - A fuel injection device for smooth discharge of a gas accumulated therein comprising a fuel pump, a solenoid valve for injecting pressurized fuel into the intake passage of an engine, a high-pressure fuel passage extending from the fuel pump to the solenoid valve and has a medially positioned constant-pressure chamber, and a fuel return passage connected to a fuel return pipe, with the fuel return passage extending from the constant-pressure chamber and having a medially positioned priming pump. The constant-pressure chamber is configured with the top wall in the upper space thereof disposed above the opening of the high-pressure fuel passage opposite the solenoid valve, the fuel return passage opens into the upper space at a position above the opening of the high-pressure fuel passage, and the gas accumulating in the constant-pressure chamber is discharged from the upper space toward the fuel tank via the fuel return passage. | 11-12-2015 |