Flat panel display drive circuit with switched drive current

Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device

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3151691, 3151694, 315349, G09G 310

Patent

active

056441959

ABSTRACT:
A Field Emission Display ("FED") is disclosed having a brightness to project images. To achieve this benefit, the FED comprises a pixelator is coupled to a display for displaying and projecting the image. By design, the pixelator conducts a current, corresponding to a degree of brightness in the resulting panel display, through the display grid. 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 comprising at most one half of the first value is employed. A switch for connecting the first resistor in parallel with the second resistor is utilized such that when a control signal is received, the switch is enabled and the equivalent resistance between the pixelator and a voltage node or ground is substantially reduced. In one embodiment of the invention, the first resistor comprises a resistive layer, while the second resistor comprises a tap for tapping the resistive layer between the first and second terminations of the resistive layer, thereby creating the second resistor smaller than the first resistor.

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Yokoo, K. et al., "Active Control of Emission Current of Field Emitter Array," Revue Le Vide, les Couches Minces,--vol. 271, Mar.-Apr. 1994.

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