摘要:
A semiconductor laser device having a stripe-shaped active region defined between a pair of end surfaces, at least one of the end surfaces having a curved cross-section in a plane parallel to the active region with a radius of curvature from 10 to 300 .mu.m, the stripe of the active region having such a width that a single transverse mode and a multi-longitudinal mode are allowed. The laser beam emitted from this laser can have little astigmatism and small spot size.
摘要:
A high-power low-noise semiconductor laser device required for light sources for an erasable optical disc is a self-sustained pulsating semiconductor laser device in which an MQW structure is used for an active layer, and thus a kink output power and a light output power by which the self-pulsation is enabled are increased to 10 mW or more and noise is reduced. Another semiconductor laser device of a self-pulsation type has impurities that are doped in the active layer to reduce the self-pulsating frequency to obtain a low-noise characteristic even if higher optical feedback occurs. 259
摘要:
An optielectronic device comprising a substrate crystal whose crystal plane is a (n11) plane tilted from the (100) plane toward the [110] direction, or [110] direction where (n>1). When the substrate is applied to an AlGaInP semiconductor laser, the optical device can be cleaved into a rectangular shape, as in the case of a (100) substrate crystal, resulting in easy handling of the chips and also is effective for making the lasting wavelength shorter, lowering the threshold current density for lasing, improving the continuous lasing temperature, etc. Furthermore, semiconductor lasers of different lasing wavelengths can be prepared under good control. Furthermore, a doping efficiency having no dependence on a tilt angle can be obtained by proper selection of a dopant. For example, Si is suitable as an n-type dopant entering sites of group III atom on an (n11) A plane (n.gtoreq.2).
摘要:
A video recorder includes a schedule reconfiguration section having: a local deterioration determining module that determines whether a local deterioration in a recording state occurs by performing simulating the recording state obtained when the reallocated resources are used for performing the programmed recordings and comparing the simulated recording state with a recording state obtained when the resources before the reallocation is used for performing the programmed recordings; and an allocation restoring module that restores the reallocated resources at a part causing the local deterioration to the resources allocated before the reallocation when the local deterioration determining module determines the occurrence of the local deterioration.
摘要:
A cyclopropane derivative represented by the following formula (I) or a pharmaceutically acceptable salt thereof has orexin receptor inhibitory action, and thus, is extremely useful as an agent for preventing or treating sleep disorder or dyssomnia caused by orexin, including insomnia as a typical example: wherein A1, A2 and A3 each independently represent an aryl group, a heterocyclyl group or the like, R1, R2 and R3 each independently represent a hydrogen atom, a C1-6 alkyl group or the like, X represents an oxygen atom or the like, and L represents a bond or the like.
摘要:
An illuminating apparatus has a reduced number of mounting spots by soldering or the like to permit an increased yield rate and a reduced cost. The illuminating apparatus has light emitting diodes, lead frames, and a transparent sealer. N light emitting diodes, N sets of lead frames mounted with the N light emitting diodes, and one set or more of lead frames each not mounted with a light emitting diode are sealed by the transparent sealer for integration into a modular illuminating apparatus. Also provided are a method for fabricating the illuminating apparatus, and a display apparatus using the illuminating apparatus.
摘要:
According to an aspect of the embodiment, an area control unit refers to usage information of an area management table based on a determined type of an extracted failure information, determines whether the extracted failure information can be stored in a identified lower storage areas, determines a storage location for the extracted failure information in the identified lower storage areas when the extracted failure information can be stored in the identified lower storage areas, and determines a storage location for the extracted failure information in the upper storage areas other than an upper storage area including the identified lower storage areas based on the area management table when the extracted failure information cannot be stored in the identified lower storage areas.
摘要:
An exhaust emission control system of an internal combustion engine desorbs SOx by reversing a flow of an exhaust gas through an NOx storage-reduction catalyst, of which a structure is simplified as follows. A first exhaust pipe connected to an engine is connected to a first port of an emission switching valve having four ports. A second exhaust pipe 10, through which the exhaust gas is discharged into the atmospheric air, is connected to a second port, a third exhaust pipe connected to an inlet of a catalytic converter is connected to a third port. A fourth exhaust pipe connected to an outlet of the catalytic converter 30 is connected to a fourth port. When the emission switching valve is set in a forward flow position, the first exhaust pipe is connected to the third exhaust pipe, and the second exhaust pipe is connected to the fourth exhaust pipe, whereby the exhaust gas flows toward the outlet from the inlet within the catalytic converter. When the emission switching valve is set in a backward flow position, the first exhaust pipe is connected to the fourth exhaust pipe, and the second exhaust pipe is connected to the third exhaust pipe, whereby the exhaust gas flows toward the inlet from the outlet within the catalytic converter.
摘要:
In an examination system including a head mounted display having image pickup devices such as CCDs provided therein and a computer, coordinates of an image to be displayed in the head mounted display can be set object- or body-centered. An image captured by the image pickup device is supplied to the computer where it will be processed in a predetermined manner for display in the head mounted display.
摘要:
A cold-cathode tube has hitherto been used as a backlight for supplying illumination to a liquid crystal television but recently, light emitting diode pieces have been used for a backlight of a large-size liquid crystal television. For the purpose of improving the emission efficiency, flip chip mounting of the light emitting diode piece is advantageous but the mounting yield is restricted by the piece size, electrode structure and wire pattern structure, facing situations having difficulties in realizing simplified mounting and reduction of costs of members. In a liquid crystal display apparatus having a liquid crystal panel, an optical system and a light source, the light source includes a light emitting element structure having positive and negative electrodes, at least one of them being plural, and wires mounted to the positive and negative electrodes through flip chip mounting by making electrical correspondence to individual regions of the positive and negative electrodes.