| 摘要 |
The present invention includes:standard voltage producing means for producing 2<n >tone display voltages from incoming first reference voltages in accordance with n-bit display data; andselecting means for selecting a voltage from the 2<n >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; andvoltage 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 2<n >tone display voltages.
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