| 摘要 |
<P>PROBLEM TO BE SOLVED: To optimize steady current flowing through a ladder resistor, in matching with the number of colors possessed by display data. Ž<P>SOLUTION: A liquid crystal driving device applies a gradation voltage of a voltage level according to display data to drain electrodes for an active matrix liquid crystal panel that realizes display, by applying a predetermined voltage to a plurality of drain electrodes and gate electrodes, and common electrodes on the side opposite to a liquid crystal layer. The liquid crystal driving device comprises: a first ladder resistor for generating reference voltages of a plurality of levels from the input power source voltage; a voltage follower circuit for stabilizing the reference voltages; and a second ladder resistor for generating a gradation voltage from the reference voltages which changes the resistance value, according to the information on the number of colors input externally. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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