Effective value voltage stabilizer for a display apparatus
AssigneeSharp Kabushiki Kaisha
InventorsToshio Nishimura, Masakazu Saka
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Abstract
A voltage stabilizer receiver power from a power circuit for inputting a power source voltage. The voltage stabilizer changes the width of pulses in accordance with the changes in the effective value of the power source voltage and stabilizes the effective value of an applied voltage to a display regardless of the change in the effective value of the power source voltage by subtracting this pulse from pulses comprising the display drive waveforms.
Claims5
In a display drive circuit including display drive means for driving a display with display drive waveforms formed of drive pulses, said drive waveforms being developed from voltage supplied from a power source, an effective drive voltage stabilizer comprising:
- means for sensing said voltage developed from said power source and developing a binary representation of the relative value of said voltage;
- means, responsive to said binary representation, for supplying a control signal representative of the period of each said drive pulse to said display drive means, said display drive means being responsive to said control signal to control the period of each said drive pulse.
Dependencies are inferred from the claim text.