Liquid crystal display device and method of driving the same

A liquid crystal display device wherein n-bit digital picture signals are used to represent gradation where n is a natural number of 2 or more, comprising:

• k pixels wherein k is a natural number of 2 or more;
• a gate signal line driving circuit;
• a source signal line driving circuit, the k pixels comprising a D/A converter circuit, and each of the k pixels comprising n memory circuits, a liquid crystal element, and n switching elements which can be in a conductive state by output signals from the gate signal line driving circuit;
• means for inputting output signals from the source signal line driving circuit, through each of the n switching elements, to each of the n memory circuits;
• means for selecting one out of the k pixels and then inputting the n-bit digital picture signals memorized in the selected pixel to the D/A converter circuit;
• and
• means for inputting analogue signals outputted from the D/A converter circuit to the liquid crystal element of the selected pixel.

A method of driving a liquid crystal display device wherein n-bit digital picture signals are used to represent gradation where n is a natural number of 2 or more,

• the liquid crystal display device comprising k pixels wherein k is a natural number of 2 or more, each of the k pixels comprising n memory circuits and a liquid crystal element, and the k pixels comprising a D/A converter circuit, and
• the method comprising:
• the first step of memorizing the n-bit digital picture signals in the n memory circuits;
• the second step of selecting one out of the k pixels and then inputting the n-bit digital picture signals memorized in the selected pixel to the D/A converter circuit;
• and
• the third step of inputting analogue signals outputted from the D/A converter circuit to the liquid crystal element of the selected pixel.

A method of driving liquid crystal display device wherein n-bit digital picture signals are used to represent gradation where n is a natural number of 2 or more,

• the liquid crystal display device comprising k pixels wherein k is a natural number of 2 or more, a gate signal line driving circuit, and a source signal line driving circuit, the k pixels comprising a D/A converter circuit, and each of the k pixels comprising n memory circuits, a liquid crystal element, and n switching elements which can be in a conductive state by output signals from the gate signal line driving circuit, and
• the method comprising:
• the first step of inputting output signals from the source signal line driving circuit, through each of the n switching elements, to each of the n memory circuits;
• the second step of selecting one out of the k pixels and then inputting the n-bit digital picture signals memorized in the selected pixel to the D/A converter circuit;
• and
• the third step of inputting analogue signals outputted from the D/A converter circuit to the liquid crystal element of the selected pixel.