Patent ID: 7948464

Claim:
A memory-type liquid crystal display device having a display area and a peripheral area located on the perimeter of the display area, comprising: a memory-type liquid crystal provided between first and second substrates and having a first stable state and a second stable state; a first pixel disposed on the display area; a second pixel disposed on the peripheral area; and a control unit that applies a reset pulse to a portion of the memory-type liquid crystal corresponding to the first and second pixels so that the portion of the memory-type liquid crystal corresponding to the first and second pixels becomes one of the first and second stable states at a reset period which resets a state of the memory-type liquid crystal, and controls the memory-type liquid crystal corresponding to the second pixel so that the portion of the memory-type liquid crystal corresponding to the second pixel maintains its stable state of the reset period, without using display data, at a frame period after the reset period; wherein the control unit detects a display color exhibited by an index pixel contained in the display area, and applies the reset pulse to the memory-type liquid crystal so that the portion of the memory-type liquid crystal coinciding with the peripheral area will produce the same display color as the display color exhibited by the index pixel, or the control unit detects a display color exhibited by the largest number of pixels contained in the display area, and applies the reset pulse to the memory-type liquid crystal so that the portion of the memory-type liquid crystal coinciding with the peripheral area will produce the same display color as the display color exhibited by the largest number of pixels.