Supply voltage removal detecting circuit, display device and...

Details Supply voltage removal detecting circuit, display device and... Supply voltage removal detecting circuit, display device and...

2006-10-03

2008-11-18

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S078000, C361S092000

Reexamination Certificate

active

07453290

ABSTRACT:
A supply voltage removal detecting circuit, a display device and method for removing a latent image when a supply voltage is disconnected, in which the supply voltage removal detecting circuit includes a voltage controller, a detection signal generator, and an output unit. The voltage controller controls voltages such that when a first supply voltage and a second supply voltage stay at a first level, the voltage at a first node is greater than the voltage at a second node, and when the first supply voltage or the second supply voltage becomes a second level, the voltage at the second node stays at a specific level, and the voltage at the first node is less than the specific level. The detection signal generator generates a detection signal by comparing the voltage at the first node with the voltage at the second node. The output unit prevents the voltage controller and the detection signal generator from faulty operations, and inverts the detection signal in response to an operation enabling signal to output a detection control signal.

REFERENCES:
patent: 4266145 (1981-05-01), Amacher et al.
patent: 6310497 (2001-10-01), Strauss
patent: 7281151 (2007-10-01), Miyake et al.
patent: 11-271707 (1999-10-01), None
patent: 2004-226597 (2004-08-01), None
patent: 1020030029729 (2003-04-01), None

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