Communications: electrical – Continuously variable indicating – With meter reading
Patent
1986-11-17
1988-09-20
Weldon, Ulysses
Communications: electrical
Continuously variable indicating
With meter reading
340804, 358241, H04Q 100
Patent
active
047728868
ABSTRACT:
A matrix driver is provided, comprising a plurality of light emitting diodes, energizing means for successively pulse-driving and scanning the light emitting diodes, and control means for instructing the energizing means about the sequence of scanning, characterized by protective means for preventing one specified diode among the light emitting diodes from being continuously pulse-energized.
REFERENCES:
patent: 3765011 (1973-10-01), Sawyer et al.
patent: 4103290 (1978-07-01), Sekiguchi
patent: 4106283 (1978-08-01), Yamashita
patent: 4234821 (1980-11-01), Kako et al.
patent: 4300138 (1981-11-01), Nakauchi et al.
Alps Electric Co. ,Ltd.
Chong Leighton K.
Shoup Guy W.
Weldon Ulysses
Winters Paul J.
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