| Patent application number | Description | Published |
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| 20090212832 | LOAD CAPACITY DRIVING CIRCUIT - The present invention provides a load capacity driving circuit that is inexpensive and has a high driving capability. When an input signal changes to low potential, gate voltage of an output stage of an amplifying circuit increases, an NMOS transistor MNO turns on, and an NMOS transistor MN | 08-27-2009 |
| 20100245987 | SEMICONDUCTOR OPTICAL AMPLIFIER - It is desirable to provide a semiconductor optical amplifier from which it becomes able to obtain a higher output power. A semiconductor optical amplifier in comprises an active wave guiding layer which comprises a passive core region that is formed of a semiconductor, and active cladding regions that are located at both sides of the passive core region and each of that is comprised of an active layer which is formed of a semiconductor and which has an index of refraction to be lower than that of the passive core region, wherein a light is wave guided with being amplified in the active wave guiding layer. Moreover, it is desirable for the active wave guiding layer to be formed of a compound semiconductor, and to be formed by integrating the passive core region and the active cladding regions to be monolithic on to a substrate that is formed of a compound semiconductor by making use of a process of a butt joint growth. | 09-30-2010 |
| 20100246613 | SEMICONDUCTOR LASER, METHOD FOR GENERATING LASER BEAM AND METHOD FOR REDUCING A SPECTRAL LINE-WIDTH OF LASER BEAM - A semiconductor laser is provided capable of generating very narrow laser beams and having stable characteristics, a method for generating the laser beams and a method for reducing a spectral line-width of the laser beams. The semiconductor laser includes a semiconductor active layer, a photonic crystal optical waveguide forming a periodic structure of two-dimensional refractive index within a plane perpendicular to a semiconductor laminate direction directly or indirectly connected to the semiconductor active layer; and an optical cavity that contains the semiconductor active layer and the photonic crystal optical waveguide and oscillates light that is generated from the semiconductor active layer and is guided through the photonic crystal optical waveguide as laser. | 09-30-2010 |
| 20100254085 | ELECTRONIC APPARATUS - Provided is an electronic apparatus capable of preventing an unnecessary space from being made inside the housing, and of improving ventilation efficiency of the air flowing along the power circuit. An electronic apparatus includes: a power circuit; a power circuit case ( | 10-07-2010 |
| 20110243494 | SEMICONDUCTOR OPTICAL AMPLIFIER MODULE - Included are a semiconductor device unit in which a semiconductor optical amplifier and a first semiconductor photo detector being configured to monitor a part of an input light input to the semiconductor optical amplifier or a part of an output light output from the semiconductor optical amplifier are integrated on a mutually same substrate, and a passive waveguide unit connected to the semiconductor device unit and in which a first passive waveguide being configured to cause the input light to be input to the semiconductor optical amplifier or to cause the output light to be output from the semiconductor optical amplifier and a second passive waveguide branching from the first passive waveguide and being configured to cause a part of the input light or a part of the output light to be input to the first semiconductor photo detector are provided on a mutually same substrate. | 10-06-2011 |
| Patent application number | Description | Published |
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| 20100123704 | DISPLAY PANEL DRIVING APPARATUS - The present disclosure provides a display panel driving apparatus that can make the circuit layout surface area smaller, and prevent circuit damage. The display panel driving apparatus includes a source amplifier, a sink amplifier, a switch and the like. The source amplifier includes a first output circuit, a second output circuit and the like, and a guard transistor is provided between the first output circuit and the second output circuit to prevent an output signal voltage of the first output circuit from becoming less than an intermediate voltage. The sink amplifier includes a first output circuit and a second output circuit, and a guard transistor is provided between the first output circuit and the second output circuit to prevent an output signal voltage of the first output circuit from exceeding an intermediate voltage. | 05-20-2010 |
| 20110157120 | DRIVE CIRCUIT AND DISPLAY DEVICE - A drive circuit for driving a display panel includes a first operation amplifier for operating using a first power source voltage and a second power source voltage; a second operation amplifier for operating using a third power source voltage and a fourth power source voltage; a control unit for supplying a first control voltage and a second control voltage; and a switch circuit for switching the first operation amplifier and the second operation amplifier. The switch circuit includes an n-channel type field effect transistor. The control unit applies the first control voltage to the n-channel type field effect transistor, so that the n-channel type field effect transistor transits from a non-conductive state to a conductive state. | 06-30-2011 |
| 20120001952 | DRIVING CIRCUIT AND DISPLAY APPARATUS - A driving circuit includes a pair of operational amplifiers, one producing an analog voltage output of positive polarity, the other producing an analog voltage output of negative polarity. An output switching circuit interchanges these outputs between a pair of data lines. One or both of the operational amplifiers includes a parasitic diode having one terminal connected to the output terminal of the operational amplifier and another terminal normally connected to a power supply voltage of the operational amplifier. When the output of the operational amplifier is switched, a protective switching circuit temporarily disconnects the parasitic diode from the power supply of the operational amplifier and instead connects it to a power supply line carrying a voltage high enough, or low enough, to ensure that the parasitic diode is not forward biased by the existing voltage on the data line to which the output is switched. | 01-05-2012 |
| 20120086697 | DRIVING DEVICE OF DISPLAY DEVICE - There is provided a driving device of a display device, including: a first switching portion; a second switching portion; and a control section that, when the potential of a drive signal line is lower than a target potential, operates the first switching portion by using, as a first reference potential, a potential that is less than or equal to the target potential and that is closest to the target potential, among predetermined n types (n≧1) of potentials, and, when the potential of the drive signal line is higher than the target potential, operates the second switching portion by using, as a second reference potential, a potential that is greater than or equal to the target potential and that is closest to the target potential, among the n types of potentials. | 04-12-2012 |
