Liquid crystal display device and method of driving the same

A liquid crystal display device that performs intermittent driving involving a driving period and an idle period, the liquid crystal display device comprising:

• a plurality of scan lines;
• a plurality of signal lines crossing the plurality of scan lines;
• a pixel-forming unit provided at the intersection of each of the plurality of scan lines and each of the plurality of signal lines;
• a scan line control unit that scans the plurality of scan lines by selecting one after another of the scan lines;
• a gray scale level control unit that generates, from an input image signal, an image signal for display and an image signal for correction;
• and
• a signal line control unit that writes the image signal for correction to the plurality of signal lines before writing the image signal for display during a driving period, wherein
• the gray scale level control unit includes:
• a correction value storage unit that stores a correction gray scale value associated with a gray scale value of at least a current frame of the input image signal;
• a first correction circuit that corrects the input image signal based on the correction gray scale value read from the correction value storage unit;
• and
• a second correction circuit that specifies, in a pixel region including the pixel-forming unit, a regular pixel pattern including at least a first pixel and a second pixel and changes an output from the first correction circuit for the first pixel by a predetermined gray scale width, and
• the second correction circuit changes the output from the first correction circuit for the first pixel by increasing or decreasing it by one gray scale level, and leaves unchanged the output from the first correction circuit for the second pixel.

A liquid crystal display device that performs intermittent driving involving a driving period and an idle period, the liquid crystal display device comprising:

• a plurality of scan lines;
• a plurality of signal lines crossing the plurality of scan lines;
• a pixel-forming unit provided at the intersection of each of the plurality of scan lines and each of the plurality of signal lines;
• a scan line control unit that scans the plurality of scan lines by selecting one after another of the scan lines;
• a gray scale level control unit that generates, from an input image signal, an image signal for display and an image signal for correction;
• and
• a signal line control unit that writes the image signal for correction to the plurality of signal lines before writing the image signal for display during a driving period, wherein
• the gray scale level control unit includes:
• a correction value storage unit that stores a correction gray scale value associated with a gray scale value of at least a current frame of the input image signal;
• a first correction circuit that corrects the input image signal based on the correction gray scale value read from the correction value storage unit;
• and
• a second correction circuit that specifies, in a pixel region including the pixel-forming unit, a regular pixel pattern including at least a first pixel and a second pixel and changes an output from the first correction circuit for the first pixel by a predetermined gray scale width, and
• within the driving period, the length of a period in which the pixel signal for display is written is equal to the length of a period in which the image signal for correction is written.