Flat panel display drive circuit with switched drive current

Details Flat panel display drive circuit with switched drive current Flat panel display drive circuit with switched drive current

1993-06-15

1995-02-07

Pascal, Robert J.

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

3151691, 3151694, 315349, G09G 310

Patent

active

053878442

ABSTRACT:
A Field Emission Display ("FED") is disclosed having a brightness to project images. To achieve this benefit, the FED includes a pixelator which coupled to a display for displaying and projecting the image. By design, the pixelator conducts a drive current passing through the display grid corresponding to a degree of brightness in the resulting panel display. A first resistor having a first value is coupled between the pixelator and a voltage node or ground. Moreover, a second resistor having a second value at most one half of the first value is employed. A switch for connecting the first resistor in parallel with the second resistor is closed when a control signal is received when the switch is enabled, the equivalent resistance between the pixelator and a voltage node or ground is substantially reduced. In another embodiment, a tapped resistor replaces the first resistor and the second resistor. When the control signal is received, a portion of the drive current is shunted through the switch.

REFERENCES:
patent: 3723852 (1973-03-01), Peterson et al.
patent: 4554539 (1985-11-01), Graves
patent: 4866349 (1989-09-01), Weber et al.
patent: 5162704 (1992-11-01), Kobori et al.
patent: 5210472 (1993-05-01), Casper et al.
patent: 5283500 (1994-02-01), Kochanski

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