| 摘要 |
PURPOSE:To properly execute gamma correction by allowing a modulation means to perform nonlinear gradation correction from a digital video signal to a gradation signal. CONSTITUTION:A display pannel 30 is driven by an X driver 32 and a Y driver 34. On the other hand, a video signal is supplied to a memory 38 through an A/D converter 36, and the data from the memory 38 are supplied to the X driver 32. Then, a gradation correction part 40 is provided in the X driver 32, and by the gradation correction part 40, the gradation correction is performed when the digital video signal is converted to the gradation signal by the modulation means in the X driver 32. Further, the X driver 32, the Y driver 34 and the memory 38 are controlled by a controller 42. That is, in such a case, when PWM(pulse width modulation) and PDM(pulse density modulation) are performed to the data of the digital video signal, the modulation is performed so as to have a required gamma characteristic.
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