Patent ID: 6297813
Filing Date: 2001-10-02
Classification: G09G

Abstract:
A driving circuit for a display device displaying a plurality of gray levels in accordance with digital data including a first bit portion and a second bit portion, the driving circuit comprising:a voltage dividing circuit for generating a plurality of interpolation voltages by dividing a plurality of externally-supplied gray-level voltages, each interpolation voltage having a voltage level between the levels of two adjacent ones of the gray level voltages;a first selection circuit for selecting a first voltage and a second voltage which is different from the first voltage from among the plurality of gray level voltages and the plurality of interpolation voltages based on the first bit portion of the digital data, wherein at least one of the first and second voltages is one of the generated interpolation voltages;a second selection circuit for selecting one of a plurality of oscillating signals having different duty ratios based on the second bit portion of the digital data; andan output circuit for outputting an oscillating voltage which oscillates between the first voltage and the second voltage selected by the first selection circuit at a duty ratio of the oscillating signal selected by the second selection circuit.