Driving voltage controller

Details Driving voltage controller Driving voltage controller

2006-10-10

2006-10-10

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

Waveform generator coupled to display elements

C345S098000

Reexamination Certificate

active

07119802

ABSTRACT:
A compact-size driving voltage controller is provided which can be driven with low power. The compact-size driving voltage controller which can be driven with low power includes a High output operational amplifier and a Low output operational amplifier for supplying driving voltages VcomH, VcomL to a load such as a liquid crystal display panel, an output switch for alternating between the outputs of the operational amplifiers, a Low voltage setting operational amplifier for generating a set voltage to be supplied to the non-inverted input terminal of the Low output operational amplifier, a set voltage generator including a current mirror circuit and a clamping circuit, a bias current controller for controlling the bias current flowing in each operational amplifier with a predetermined timing, and a timing controller for controlling the changeover timing of the output switch.

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