Patent ID: 8089443

Claim:
A liquid crystal display device formed by laminating at least two first and second liquid crystal panels, said liquid crystal panels being each formed by disposing a liquid crystal layer between two transparent substrates arranged so as to be opposed to each other and two-dimensionally arranging pixels in a form of a matrix on one of said two substrates, and disposing a backlight on a side of said first liquid crystal panel, said liquid crystal display device comprising: first driving means for driving said first liquid crystal panel on a side of said backlight by n-time speed driving in which one frame period is divided into n fields; and second driving means for driving said second liquid crystal panel on a display surface side by normal driving in which one frame period is not divided, wherein the first liquid crystal panel controls an amount of light entering the second liquid crystal panel, and driving of the second liquid crystal panel is set to make display of the first liquid crystal panel and the second liquid crystal panel as a whole an impulse type display in which pixels blink, wherein in a liquid crystal display device that performs double-speed driving of the first liquid crystal panel and normal driving of the second liquid crystal panel, when response waveform of the second liquid crystal panel is a waveform in which a transient change is made from a black gradation to a predetermined gradation in one frame period, and the first liquid crystal panel is driven such that a black gradation voltage is applied in a first field and a white gradation voltage is a applied in a second field, response waveform of the first liquid crystal panel is a sawtooth waveform, and optical waveform of the first liquid crystal panel and the second liquid crystal panel as a whole is a sawtooth waveform, wherein in the liquid crystal display device that performs double-speed driving of the first liquid crystal panel, in a case where two gradations are repeated, polarity of a first field and a second field of a particular frame is made to be positive polarity, and polarity of a first field and a second field of a subsequent frame is made to be negative polarity, and wherein a γ representation of the liquid crystal display device as a whole is equal to a γ representation of the second liquid crystal panel.