Passive data display and method and means for control and monito

Details Passive data display and method and means for control and monito Passive data display and method and means for control and monito

1980-12-16

1983-12-13

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340641, 340765, 350336, G09G 318

Patent

active

044207484

ABSTRACT:
In the disclosed display, the symbol segments of a passive cell, such as a liquid crystal cell, are each connected to one of two leads through an elastic connector layer having mutually insulated conductors running through the layer transverse thereto. According to an embodiment of the invention, the leads are on a printed circuit board and a control bus connects one of the leads to a control unit that operates the cell and a second bus connects the other of each of the leads to a monitor unit that compares the potential at each segment with the potential at the control unit. This checks the connections between the control unit and each segment.

REFERENCES:
patent: 3716290 (1973-02-01), Borel et al.
patent: 3938140 (1976-02-01), Garcia et al.
patent: 4127321 (1978-11-01), Koyama et al.
patent: 4204205 (1980-05-01), Yagi et al.
patent: 4247852 (1981-01-01), Utzinger
patent: 4297004 (1981-10-01), Nishimura et al.
Astle; "A Fail-Safe Font of Seven-Segment Digits"; Electronics, 8/28/72, pp. 93, 94.

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