| 摘要 |
PROBLEM TO BE SOLVED: To suppress shifting of the luminance with respect to gradation levels after gamma correction with red, green and blue. SOLUTION: At the time of converting gradation data expressed in 64 steps from a black level up to a white level relating to the respective colors; red, green and blue to gradation voltages, the resistance values of the portions corresponding to the black level in a ladder resistance section 21 for dividing down the reference voltage for generating the gradation voltages are changed over according to the respective colors. More specifically, resistors R<SB>R</SB>, R<SB>G</SB>, and R<SB>B</SB>corresponding to the respective colors; red, green and blue are parallel connected changeably between a VINO line and a VINI line and are changed over to the resistor R<SB>R</SB>when the color of the gradation data is red, to the resistor R<SB>G</SB>when the color of the gradation data is green, and to the resistor R<SB>B</SB>when the color of the gradation data is blue. COPYRIGHT: (C)2005,JPO&NCIPI
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