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 touch sensitive switch with a light comprises a light sensor which detects a finger approaching the key top using the output of the light sensor to detect that the touch sensitive switch with a light is to be operated before the operation takes place. Notification to the person who operates the key-top can therefore be given by any predetermined effect such as a voice accruing based on the output of the light sensor just before the operation starts. Therefore, confusion does not arise even when the switch is put to a large number of uses.

Abstract: An optical pointing device for instructing a predetermined operation by moving an index over a display screen of a computer is configured such that a plurality of photocouplers are arranged on vertical sides and horizontal sides of a rectangular operation plane at a predetermined pitch in such a manner that lines of action thereof cross each other at a right angle, coordinates of a first shading pointer contacted to the surface of the operation plane are detected by the photocouplers, coordinates of a second shading pointer contacted to the surface of the operation plane are then detected, and a moving direction is set from the coordinates to move the index.

Abstract: In an optical coordinate input apparatus, the light emitting elements 3a and the light receiving elements 3b of a surface-mounted type constituting the photocouplers 3 are used and mounted on the substrate 2 in close contact with the substrate 2 and the photocouplers 3 arranged on the rear side 2d are displaced from the photocouplers 3 arranged on the front side 2c by half a pitch. Therefore, the lines 3c of action of the photocouplers 3 can be made close to the substrate and the resolution can be improved to twofold while there is not produced such a difference of the detection position that will cause practical inconvenience.

Abstract: The light selected by a selection circuit 3 at a light emitting side and emitted from a light emitting element 1 such as a LED is converted to a specifically modulated light by an oscillation circuit 11. The light received by a light receiving element 2 such as a phototransistor at the receiving side is amplified by an amplifier circuit 6, and a detection circuit 12 detects whether a specifically modulated light is received. The H/L detection circuit 13 determines the presence/absence of a light interruption to produce a signal of either H (high level) or L (low level). Also, the signal from the oscillator 11 of the emission side is received by the receiving side and compared with the received signal to determine whether the same signal as emitted from the emitting element has been actually received.