Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate, and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: To enhance the emission output of the light emitting device including an active layer made of nitride semiconductor containing In, the light emitting device having an active layer between the n-type semiconductor layer and the p-type semiconductor layer, characterized in that the active layer comprises an well layer made of Inx1Ga1−x1N (x1>0) containing In and a first barrier layer made of Aly2Ga1−y2N (y2>0) containing Al formed on the well layer.

Abstract: Microarea light-emitting diodes, which have no variation in light output power and the like due to mode-hopping, are used and changes in properties such as light output and the like due to generated heat are prevented. Pulses having a constant period and a substantially constant power are used, a number of the pulses within a period for forming an image corresponding to one pixel is determined on the basis of image data, and light beams emitted from the microarea light-emitting diodes are modulated by pulse signals including the determined pulses.

Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate, and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate, and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate, and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate, and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate, and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: A gallium nitride-based III-V Group compound semiconductor device has a gallium nitride-based III-V Group compound semiconductor layer provided over a substrate, and an ohmic electrode provided in contact with the semiconductor layer. The ohmic electrode is formed of a metallic material, and has been annealed.

Abstract: A running guide system for an automotive vehicle planned for running in a sightseeing area or the like. Special running data including right or left turn, passage through a tunnel, running in a predetermined direction and passage on a slope are stored in a cassette tape together with distance data representing the distance from a start point in the form of a plurality of check point data. By collation of the running distance data actually measured and the special running condition data with the stored data, the automobile is guided audibly or visually. Geographical data or sightseeing data are also recorded in the cassette tape and reproduced in voice from time to time. When the automobile is displaced from the planned running route, an alarm is issued. When the automobile is restored to the planned running route, the planned running guide is restored.

Abstract: An image analyzer for analyzing the position of a vehicle driver in a three-dimensional coordinate system. The analyzer comprises a light emitting element for emitting an infrared light the driver's face portion and an image detector arranged to receive reflected infrared light to generate an optical image of the driver's face portion. A microcomputer includes a memory for storing an electronic image corresponding to the optical image and processes the stored image to determine the position of a facial feature, such as an eye, in a three-dimensional coordinate system. Position indicating data is utilized in a driver assistance system.

Abstract: In a speed display device of the numerical display type which comprises a speed sensor for producing an electric speed signal indicative of a travel speed of the vehicle, and an electric display responsive to the speed signal for providing a numerical display indicative of the travel speed of the vehicle, the improvement comprises an electric control device responsive to the speed signal for successively enlarging the size of the numerical display in accordance with rise of the speed level. Alternatively, the electric control device may be arranged to be responsive to the speed signal for successively inclining the shape of the numerical display in accordance with rise of the speed level.