Method and apparatus for price display
作者： Leland M. Farrer , Larry A. Lincoln , Kent A. Fritz , Joseph S. Chan , James W. Pfeiffer
DOI:
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摘要: Improvements in price display system for a retail establishment which includes transmission of UPC data from central computer (18) to large number modules via intermediary nodes (90, 92). Features the include various architectures connecting conventional point-of-sale store (16), multiple radio transmitters (28) and receivers (30) communication modules, isolation groups their power sources provide more robust system, hard wiring (32) providing mains current methods ensuring that individual are operating properly, improvements module optical port (180) be responsive changes ambient light level, an improved method programming directly wand, heater element (200) with protective circuit (204, 206).
lens.org 参考文章(20)
Herbert S. Sarwin, Product control system for supermarkets and the like ,(1983)
Miklos J. Kollanyi, Loss of optical input circuit ,(1988)
Malcolm H. Davis, Hugh F. Spence, William P. Seltzer, Daniel J. Kleffner, Kent A. Janes, Electronic pricing display system ,(1987)
Tatsuru Kojima, Diversity reception radio receiver ,(1986)
Tomomi Sano, Kikuo Kawasaki, Hitoshi Yamamoto, Wired commodity vending system ,(1985)
Akio Gotoh, Tuguo Ishikawa, Kazuo Yamamoto, Diversity reception system in a portable radio apparatus ,(1984)
Richard A. Erhart, Michael J. DeLuca, Joan S. DeLuca, Method and apparatus for out of range detection in response to nondetection of predetermined baud rates ,(1989)
Marc A. Dissosway, Jeffrey S. Childress, Hardware interface and protocol for a mobile radio transceiver ,(1987)
Marilyn S. Ellis, Edward H. Ellis, Differential illumination sensitive switching circuit ,(1985)