| 摘要 |
PROBLEM TO BE SOLVED: To stabilize a reference voltage generated by aγ-amplifier, and gradation voltages generated therefrom. SOLUTION: A data line driver 2 includes: a D/A converter 24 and an output circuit 25 for driving a liquid crystal display panel 1; a highest gradation voltage wiring 27 for supplying a highest reference voltage V<SB>1</SB>supplied from theγ-amplifier 26<SB>1</SB>to the D/A converter 24 as a gradation voltage V<SB>γ1</SB>; a resistance ladder 28 which receives reference voltages V<SB>2</SB>to V<SB>m-1</SB>fromγ-amplifiers 26<SB>2</SB>to 26<SB>m-1</SB>, respectively, to produce the gradation voltages V<SB>γ2</SB>to V<SB>γp-1</SB>; and a lowest gradation voltage wiring 29 for supplying a lowest reference voltage V<SB>m</SB>supplied from aγ-amplifier 26<SB>m</SB>to the D/A converter 24 as a gradation voltage V<SB>γp</SB>. The D/A converter 24 and the output circuit 25 drives data lines of the liquid crystal display panel 1 using the gradation voltages V<SB>γ1</SB>to V<SB>γp</SB>. The highest gradation voltage wiring 27 and the lowest gradation voltage wiring 29 are separated from the resistance ladder 28. COPYRIGHT: (C)2008,JPO&INPIT
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