Low power liquid crystal display driver circuit

DETAILED DESCRIPTION In accordance with this invention, a low power display circuit is provided.
This circuit includes an input circuit to receive data to be displayed.
The input circuit is connected to segment output circuitry that supplies output signals to several display segments.
The segment output circuitry further includes a switching means which provides a higher voltage output to the display segments than is supplied to the switch.
This is made possible by using the switching/triggering signal to generate an additional charge at a node which is discharged to provide the output signal.
Further provided is display timing circuitry which also includes a switch that provides a signal of greater magnitude than is provided by the power supply to the switching circuitry itself.
Again, this is possible by using charge supplied by the switch triggering signal.
The output of the display timing circuitry provides timing interval information to the display elements.
In a specific embodiment of this invention, display circuitry is provided that includes input circuitry to interface with microcomputer registers.
The input circuitry is connected to segment output circuitry to provide segment information to the display elements.
The segment output circuitry further includes switching circuitry that is connected to a voltage supply.
The switching circuitry is fabricated using MOS field effect transistors.
The switching circuitry is structured such that the gate signal that normally triggers the MOSFET device used to provide additional charge to a node which is used to provide output signals to the display segments.
Also included is the display timing circuitry which also includes switching means that provides a signal of magnitude greater than the magnitude of the voltage supplied to the switch.
This signal is used to inform the display segments as to the timing intervals.
Again, the signal magnitude is achieved by providing additional charge from the switching signal to the switching device via a capacitor connected to the output node