| 摘要 |
A drive circuit for liquid crystal display apparatus is constituted with an input unit that performs input of a digital signal for liquid crystal apparatus drive, a digital/analog conversion unit that converts the digital signal that has undergone a specific type of processing after the input to an analog signal and an amplifier unit that amplifies an output from the digital/analog conversion unit to a signal level required for driving the liquid crystal apparatus. By providing a drive circuit B having an amplification factor alpha >1 at the amplifier unit, the voltage of the signal transmitted from the D/A unit to the amplifier unit is set lower by an amplification factor 1/alpha. Through this structure, a reduction in the pattern area occupied by the D/A unit is achieved so that the number of dots that may be placed within the same pattern area can be increased. As a result, a larger scale for the integrated circuit for liquid crystal display apparatus drive can be achieved.
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