US Patent 7148943 Liquid crystal display device

A liquid crystal display device has a pair of substrates, a liquid crystal inserted in an annular seal between the substrates, and a threshold pattern provided in a frame portion between the annular seal and a pixel display area. The threshold pattern has an opening connecting the pixel display area with an area between the annular seal and the threshold pattern. The liquid crystal can move between the space in the threshold pattern and the area between the annular seal and the threshold pattern in response to the expansion and the contraction of the liquid crystal.