| 摘要 |
A gamma correction circuit includes a main imaging signal processing circuit and a correction signal generating circuit. The main imaging signal processing circuit receives an input imaging signal (RGB signals: 3 three primary color signals) Si, and generates an output imaging signal on the basis of a predetermined reference voltage and an output resistance. Moreover, the correction signal generating circuit includes a plurality of current differential amplifiers connected in parallel with each other, and is configured so that the input imaging signal is supplied to the current differential amplifiers and each output of the current differential amplifiers is added to the generated output imaging signal from the main imaging signal processing circuit. A gamma corrected imaging signal So produced by adding the gamma correction signal and the output imaging signal from the main imaging signal processing circuit is supplied to, for example a signal amplifying circuit (pre-amplifier in an embodiment) of a computer display apparatus.
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