Low power optical transceiver for portable computing devices

Details Low power optical transceiver for portable computing devices Low power optical transceiver for portable computing devices

1989-03-20

1991-12-24

Eisenzopf, Reinhard J.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359154, 341 69, H04B 1000

Patent

active

050757920

ABSTRACT:
Optical transceiver (22) for calculator-to-calculator or calculator-to-module communication. The transceiver (22) includes an IR transmitter (24) and IR receiver (26) designed for use in the low power, low cost environment of calculators and portable computing devices. The transceiver may be adapted to communicate with the CPU (central processing unit (14) of a calculator (90) directly or with that of a portable computing device via its serial port (43). Devices in which the optical transceiver may be incorporated include calculators, plugless modules, and books containing plugless modules. Data such as mathematical formulas within the book may be stored in the associated module and transferred instantaneously and accurately to an adjacent calculator upon request by the calculator.

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patent: 4837556 (1989-06-01), Matsushita et al.
patent: 4856090 (1989-08-01), Kitani et al.
patent: 4885804 (1989-12-01), Mayle

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