Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1992-06-10
1994-10-18
Chilcot, Jr., Richard E.
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359155, 340539, 340568, 34082549, H04B 1000
Patent
active
053573617
ABSTRACT:
A discriminating light-emitting apparatus comprises a transmitting unit capable of optionally setting a coded optical signal or a signal having a specific wavelength, and a receiving unit responsive only to the optionally coded optical signal or the signal having the specific wavelength issued from the transmitting unit, to execute display. Display on the receiving unit is executed in such a manner that one or a plurality of light emitting section or sections is or are turned on and off.
REFERENCES:
patent: 4218138 (1980-08-01), Robertsson
patent: 4476469 (1984-10-01), Lander
patent: 4598272 (1986-07-01), Cox
patent: 4814742 (1989-03-01), Morita et al.
patent: 4837568 (1989-06-01), Snaper
patent: 4990892 (1991-02-01), Guest et al.
patent: 5144301 (1992-09-01), Jackson et al.
Chilcot Jr. Richard E.
Negash K.
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