| 摘要 |
PROBLEM TO BE SOLVED: To suppress increase of circuit size of a driving circuit accompanying multi-gradation. SOLUTION: VI0 to VIM are reference voltages for modulation circuit which are obtained by dividing a prescribed interval from non-light emission voltage VEOFF to largest light emission voltage VEON into equal M parts. A higher division resistance 40 produces higher gradation voltages v0 to v8M by dividing respective intervals of reference voltages VI0 to VIM for modulation circuit. A higher decoder part 41 selects adjacent two voltages from the higher gradation voltages in accordance with data of higher J bits held by a data latch. Complementary MOSFET selection switches 47-1, 47-2 are switched by the lowermost bit data input to the higher decoder part 41. A lower division resistance 43 produces gradation voltages v10 to vln-1 by dividing an interval between the selected high voltage higher gradation voltage v1 and the low voltage higher gradation voltage v1+1 into equal parts. A lower decoder part 44 selects and outputs an output voltage from a gradation voltage produced by a division resistance in accordance with data of lower K bits held by a data latch. COPYRIGHT: (C)2009,JPO&INPIT
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