| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital/analog conversion circuit capable of properly correcting optical characteristics of liquid crystal in response to design alteration and preference of a user, and of attaining miniaturization, low cost, and wide design portability. SOLUTION: The digital/analog conversion circuit includes: storage means (120) for storing desired voltage characteristic curve data; modulation means (110) for generating a frequency signal in response to voltage characteristic curve data stored in the storage means in response to selection data; variable resistance means (131, 132) connected between the first and second power supplies, which change resistances depending on the frequency signal from the modulation means; holding means (151-153, 161-163) for holding voltage generated on the variable resistance means; and output means for outputting the voltage output (150) to a desired output destination in response to the selection data. COPYRIGHT: (C)2009,JPO&INPIT
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