Abstract: To offer a semiconductor light-emitting device capable of preventing a short circuit failure caused by adhesion of the solder, change of a beam shape, and decrease of a beam output. A semiconductor laser device 1 is manufactured by overlaying a laser chip having a p-side electrode and a n-side electrode in a crystalline substrate and a mounting plate having a first solder film and a second solder film in a supporting body. The laser chip has a level difference A such that the p-side electrode is projected beyond the n-side electrode. The mounting plate has a level difference B such that the first solder film is projected beyond the second solder film. The level difference B of the mounting plate is determined as higher than the level difference A of the laser chip. Therefor, when the mounting plate is overlaid to the laser chip, first, the n-side electrode contacts with the second solder film, and then, the p-side electrode contacts the first solder film.
Abstract: Recording/reproducing information signals to/from a recording medium appropriately even though the clearance from the signal recording surface of the recording medium to an optical head slider becomes significantly small. An optical head slider 10 includes a sliding member 11 which is floated and slides on a recording medium 4 at the time of recording/reproducing signals to/from the recording medium 4, a hemispheric objective lens 12 which is bonded to the sliding member 11, and a magnetic field generating means 16, which is mounted to the bottom of the sliding member 11 which faces the recording medium 4. The sliding member 11 is made of the same material as that of the optical lens 12, and a flat surface of the optical lens 12 is bonded to the top surface of the sliding member 11.
Abstract: A light-modulation element is constituted as a light-modulation element for constituting a GLV device and has the same constitution as the conventional light-modulation element except for differing in the structure of the combined light-reflective film and membrane-side electrode of a membrane. The combined light-reflective film and membrane-side electrode is composed of a two-layer metallic film forming a TiN film of 10 nm to 70 nm in thickness provided as a lower layer and an Al film of 50 nm to 150 nm in thickness provided thereon. In the combined light-reflective film and membrane-side electrode, the Al film has a smooth reflective surface and a high light-reflectance, so that the light-utilization efficiency of the light-modulation element is high.
Abstract: The disclosed invention relates to an optical integrated device, an optical pickup, and an optical disk apparatus, and is applicable to an optical disk apparatus for playing back a compact disk (CD) and a DVD (Digital Video Disk), thereby to access a plurality of types of optical disks with a simple arrangement. For dividing feedback light with a hologram 19A and detecting the divided feedback light with a light-detecting element 20, laser sources 15A, 15B having different wavelengths are spaced a predetermined distance D from each other in order to compensate for the difference between the diffraction angles &thgr;A1, &thgr;B of the hologram 19A.
Abstract: MOS transistors A and B form a transistor circuit (an inverter in this case). A MOS transistor D is one for interrupting leakage current that has a channel length longer than those of the MOS transistors A and B. Under the action of an enable terminal (Enable), the MOS transistor D conducts only while the circuit is operated, and does not conduct and thereby interrupts leakage current while the circuit is in a standby state. A MOS transistor C does not produce effect while the circuit is operated, and makes the potential of an output terminal (Output) a high potential or a low potential (not intermediate potential) only while the circuit is in the standby state. Therefore, the circuit controls unnecessary through-transistor current of a standby type circuit in a succeeding stage, which current is conventionally caused at an intermediate potential during standby.
Abstract: There is provided a recording medium exchanging-type recording and reproducing apparatus in which its small-sized forming can be realized, either reproducing or recording operation can be carried out within a short period of time, and it is advantageous in view of light weight forming or cost. The first and second magazines for storing the tape cartridge in such a way that the tape cartridge can be inserted into or taken out are spaced apart in a lateral direction in the casing so as to cause their longitudinal directions to become in parallel to each other, and there is provided a transferring space extending along a longitudinal direction of these first and second magazines. The moving mechanism holds the tape cartridge and moves up and down in the transferring space. The delivering mechanism delivers the tape cartridge between the first and second magazines and the moving mechanism.
Abstract: A ligator comprises a ligation member formed of a bar-shaped body having a constant thickness in a region extending by at least prescribed length from one end of the ligation member. The ligation member has a front hole and a pair of side holes. The front hole is formed on one end surface of the ligation member. The front hole has a prescribed shape and a prescribed depth in the longitudinal direction of the ligation member. The pair of side holes are formed on opposite positions at one end portion of the ligation member so as to be substantially at right angles to the front hole. The front hole is located between the opposite positions. The side holes communicating with the front hole. The opposite ends of a ligature to be knotted passes through the front hole and the side holes.
Abstract: A laser diode capable of reducing an operating current and thereby improving long term reliability and able to be produced by a simpler process than in the prior art and a semiconductor light emitting device and a method of production thereof; wherein a first clad layer, an active layer, and a second clad layer are formed on a substrate, a third clad layer and a contact layer are formed on a current injection stripe region thereon, an electrode is formed so as to be connected to the second clad layer in regions other than the current injection stripe region and to be connected to the contact layer, and, at the time of emitting laser light from a laser light oscillation region by injection of a first current to the electrode via the contact layer by application of voltage, a second current which is smaller than the first current is injected in regions other than the current injection stripe region via the second clad layer, so that a laser diode is configured wherein currents at ends of the laser light oscilla
Abstract: There is disclosed a disc cartridge comprising an optical disc (13), first and second halves (15), (16) and a slide shutter (14), in which the slide shutter (14) is removably supported between the first and second halves (15) and (16), whereby it is possible to prevent erroneous opening and closing operations by making it difficult for a user's hand to touch as well as to prevent a loss of an information record by such an arrangement which is difficult for minute trash and dust to intrude.
Abstract: A flat panel display and manufacturing method therefor is provided having a baseplate hermetically sealed to a faceplate. A first electrode and a resistive layer are formed on the baseplate. An insulating layer is deposited on the resistive layer. A second electrode is formed over the insulating layer. A passivation layer is deposited over the insulating layer and a gate is formed over the passivation layer. Openings are concurrently formed in the gate and insulation layer and used to form an emitter cavity. A conductive glue is deposited to form a gate-to-electrode contact for connecting the gate and the second electrode. An emitter is formed in the emitter cavity and emitter material outside of the emitter cavity is removed.
September 5, 2001
Date of Patent:
June 15, 2004
Sony Corporation, Sony Electronics, Inc.
Abstract: A disk drive apparatus for recording (writing) and/or reproducing (reading) an information signal by rotating an optical disk, and moving an optical pick-up device along an information recording face of the optical disk. A base chassis rotationally supports a turntable on which the optical disk is loaded. A head feed mechanism suitable for use in the disk drive apparatus includes a pick-up feed mechanism having a feed shaft for moving the optical pick-up device toward and away from the turntable. A bearing portion of the feed shaft is provided integrally with the base chassis.
Abstract: An optical system capable of reducing trouble in assembly and skew adjustment, comprising first and second optical lenses arranged so that their optical axes coincide or substantially coincide, wherein the first optical lens has a substrate comprised of an optical material, the substrate has a convex portion serving as a convex lens, a flat portion positioned around the convex portion, and an outer circumference portion positioned around the flat portion, a thickness of the substrate at the outer circumference portion is greater than a thickness of the substrate at the convex portion, and the outer circumference portion of the first optical lens and that of the second optical lens are fixed in place by an adhesive so that the convex portion of the first optical lens faces the convex portion of the second optical lens.
Abstract: An illuminating optical system 36 evenly spreads an object beam L3 split from a beam splitter 34. When a control computer sends a number of images in the parallax direction, a spatial light modulation section (liquid crystal) 38 displays these images in that number of divisions under control of the control computer. A superposed projection optical system 39 superposes and projects light beams passing through the spatial light modulation section 38. A beam-condensing projection optical system 41 condenses a projected image's beam from the superposed projection optical system 39 in the parallax direction and forms this image in the non-parallax direction on the surface of a hologram recording medium 42.
Abstract: A transmission type display includes a thin film transistor for driving a pixel electrode, which transistor is provided on a substrate, and a conductive shield layer provided at a position over the thin film transistor and under the pixel electrode. A first planarization film is formed to bury an irregular contour of the thin film transistor and the shield layer is disposed on the planarized surface of the first planarization film, and a second planarization film is formed to bury steps of the shield layer, and the pixel electrode is disposed on the planarized surface of the second planarization film. Since the transmission type display has the structure in which the conductive shield layer is put between the upper second planarization film and the lower first planarization film each of which is made from an insulating material, the shielding performance and the alignment characteristic of the display can be improved.
September 30, 2002
Date of Patent:
June 8, 2004
Makoto Hashimoto, Hisashi Kadota, Hirohide Fukumoto, Takusei Sato
Abstract: A filter circuit includes two first differential circuits disposed on A and B sides, in each of which a ratio of the number of transistors to that of diodes is 1:4, and two second differential circuits disposed on the A and B sides, in each of which the ratio of the number of transistors to that of diodes is 4:1. Base electrodes of the transistors of the A-side first differential circuit and the A-side second differential circuit are connected to a circuit input terminal, while base electrodes of the transistors of the B-side first differential circuit and the B-side second differential circuit are connected to another circuit input terminal. A current source is connected to an A-side connection node for the A-side first differential circuit and the A-side second differential circuit and another current source is connected to a B-side connection node for the B-side first differential circuit and the B-side second differential circuit.
Abstract: A liquid crystal display driven by a dot-line inversion driving method in combination with a 2-step dot sequential precharge driving method which, if black window or black lines are displayed, is free of horizontal trails on circumscribing portions thereof is provided. Before video signals having opposite polarities are applied to signal lines, first, a full-line precharge pulse is generated in the horizontal blanking periods, and precharge gray signals which have the same polarity as that of the previous pixel potential are written together based on the full-line precharge pulse. Then, precharge black signals having the same polarity as that of one of the video signals and precharge gray signals having the same polarity of that of the other video signal are written in two steps.
Abstract: By desorption processing of a flat panel display in a vacuum before hermetic sealing, it is possible to reduce operational outgassing. The first embodiment involves plasma scrubbing, the second embodiment involves electron irradiation pre-aging, and the third embodiment involves electron irradiation pre-aging of the faceplate in an evacuation process.
March 31, 2001
Date of Patent:
June 1, 2004
Sony Corporation, Sony Electronics, Inc.
Abstract: A semiconductor memory enabling a read modify write operation of data, comprising: a memory cell array including a plurality of memory cells arranged in a matrix and able to be written with and read out data; a read address decoding means for independently decoding an address of a read memory cell in response to a read address; a write address decoding means for independently decoding an address of a write memory cell in response to a write address; a data reading means for reading data of a memory cell addressed by the read address decoding means; a data writing means for writing data to a memory cell addressed by the write address decoding means; and an address delay means by which a write address decoded by the write address decoding means is delayed by a predetermined time from a read address decoded by the read address decoding means, wherein the predetermined time is set as a predetermined plurality of times of basic synchronization pulse periods so that the data read modify write operation is accomplis
Abstract: In a sealing apparatus used in a process for sealing a glass tube-assembly of a flat-type cathode-ray tube by frits, three of a front panel, a screen panel and a funnel can be sealed together, and the front panel can be prevented from being broken. The sealing apparatus includes a frame for properly positioning a combined assembly in which the front panel, the screen panel and the funnel are butted with each other by frits and the following sealing jig (41). The sealing jig (41) includes a holding means (42) for holding a front panel (2) and a screen panel (3) under the condition that joint surfaces of the front panel and the screen panel are butted with each other by frits. The holding means (42) is provided with a first resilient member (43) which is urged against the outer surface of the front panel (2) and a second resilient member (42) which is urged against the outer surface of the screen panel (3).
Abstract: A laser diode applies a laser beam through a grating, a beam splitter, and an objective to a compact disc. A laser beam reflected by the compact disc is applied through the objective and the beam splitter to a photodiode. The objective has a large numerical aperture of 0.6 in order to be able of play back a digital video disc that has a thin substrate and contains information recorded at a high density. To prevent the photodiode from suffering aberrations caused due to the large numerical aperture of the objective, the photodiode has a relatively small photodetector unit having a normalized detector size ranging from 3 &mgr;m to 16 &mgr;m, for detecting only returning light up to a numerical aperture of 0.3 and not detecting light of greater numerical aperture values.