Abstract: The present invention provides a bilateral communication network system, particularly, a optical wireless communication system communicating information frames via an optical node mounted on a mobile object and a plurality of optical repeaters connected to a wired network, which can prevent transfer performance from deteriorating without increasing frames to be transferred. The optical wireless communication system is constituted as follows. A plurality of the optical repeaters having functions to switch information frames are attached to a ceiling. The optical node bilaterally communicating with the optical repeaters are mounted on a moving object such as a robot, a vehicle or the like. Information frames including address information of the optical node are periodically transmitted from an information processor connected to the optical node via optical wireless communication.

Abstract: An optical communication device having features such as: a simple structure, easily mountable, less restrictions in arrangement designing, easy to attain compact arrangement, a mechanical sturdiness and a stable wide directional angle, is constituted as follows. A plurality of LED lamps as photo-emitting elements are mounted on a base plane with a predetermined angle inclined around long axe of the respective LED lamps and the long axe of the LED lamps are arranged so as to dived a circle on the base plane equally.

Abstract: The present invention provides a bilateral communication network system, particularly, a optical wireless communication system communicating information frames via an optical node mounted on a mobile object and a plurality of optical repeaters connected to a wired network, which can prevent transfer performance from deteriorating without increasing frames to be transferred. The optical wireless communication system is constituted as follows. A plurality of the optical repeaters having functions to switch information frames are attached to a ceiling. The optical node bilaterally communicating with the optical repeaters are mounted on a moving object such as a robot, a vehicle or the like. Information frames including address information of the optical node are periodically transmitted from an information processor connected to the optical node via optical wireless communication.

Abstract: A circuit substrate comprises, on a surface of a substrate, an electronic-part packaging section extending longitudinally and a plurality of conductive patterns extending in parallel relation to each other along the electronic-part packaging section. The conductive patterns and electronic parts are electrically connected to each other by wire bonding. The conductive patterns are drawn around in a stairway manner at an area or region of the wire bonding, to form a plurality of stairway-like steps. The stairway-like steps are so formed as to extend in consideration of overhang of bonding wires. The stairway-like steps are so arranged as to extend slightly obliquely with respect to the electronic-part packaging section such that the stairway-like steps are located substantially at the same distance with respect to the electronic-part packaging section.