Stanley Electric Co., Ltd

Honda Giken Kogyo Kabushiki Kaisha

Hiroki Yokoyama

Kazuyoshi Hibiya

Daisuke Uchida

Tomoaki Kodama

Yoshiki Furukawa

Kazunori Hirosawa

Hiroyuki Abe

Hiroyuki Oka

Koji Kawabe

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. The address information is continuously transmitted from the optical repeaters to a trunk network, and a filter function is arranged in the trunk network so as to make only one frame effective among frames with the same content.

Optical wireless communication system

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. Therefore, a plurality of locations on the surface of the operation plane can be detected by the photocouplers independently, the moving direction can be set from the coordinates of locations where two pointers are placed, and only the moving direction is instructed from the operation plane, thereby making it possible to reduce the size of the pointing device.

Optical pointing device and pointing method using the same

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Hadano, Japan

Hiroki Yokoyama