发明授权
- 专利标题: Macromolecular dispersion type liquid crystal display element and method of manufacturing the same
- 专利标题(中): 高分子分散型液晶显示元件及其制造方法
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申请号: US09712845申请日: 2000-11-15
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公开(公告)号: US06355315B1公开(公告)日: 2002-03-12
- 发明人: Hirofumi Kubota , Shinya Kosako , Kenji Nakao , Noriko Naito , Tsuyoshi Uemura , Masao Yamamoto
- 申请人: Hirofumi Kubota , Shinya Kosako , Kenji Nakao , Noriko Naito , Tsuyoshi Uemura , Masao Yamamoto
- 优先权: JP8-242755 19960913; JP8-310335 19961121; JP8-317509 19961128; JP8-341013 19961220; JP9-113782 19970501
- 主分类号: C09K1938
- IPC分类号: C09K1938
摘要:
A method of forming a polymer dispersion type liquid crystal display element having a polymer dispersion type liquid crystal sandwiched between a pair of substrates, each having an inside electrode, is disclosed. The droplets either are dispersed and held in a continuous matrix phase of the polymer or held in a three dimensional network of a matrix containing the polymer. In the method, the value of (V90×R/d is at least 0.7 where V90 is that voltage required for transmittance of a voltage-transmittance characteristic of the display element to be 90% when the element is at 30° C., d is the interval between the substrate pair, and R is the average particle size of the liquid crystal droplets. In the method, a liquid crystal polymer precursor compatible solution containing a liquid crystal and a polymer precursor placed between the substrate pair is held at a temperature greater than the thermal phase separation temperature of the precursor solution, which is irradiated with ultraviolet to permit phase separation of the liquid crystal and the polymer precursor.