Patent ID: 6677923
Filing Date: 2004-01-13
Classification: G09G

Abstract:
A liquid crystal driver, comprising: standard voltage producing means for producing 2n tone display voltages from incoming first reference voltages in accordance with n-bit display data; and selecting means for selecting a voltage from the 2n tone display voltages in accordance with incoming display data, for transmission to a liquid crystal panel through a plurality of output terminals with no further processing,wherein the standard voltage producing means includes: generation means for generating a second reference voltage from adjacent two of the first reference voltages arranged in ascending or descending order, the second reference voltage having an intermediate level between those of the adjacent first reference voltages; buffer means for impedance-converting the second reference voltage for output; and voltage dividing means for producing a voltage having an intermediate level between those of the adjacent first reference voltages and of adjacent ones of the first and second reference voltages by voltage division, so as to produce the 2n tone display voltages.