发明授权
- 专利标题: Polymer dispersed liquid crystal (PDLC) display apparatus
- 专利标题(中): 聚合物分散液晶(PDLC)显示装置
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申请号: US228044申请日: 1994-04-15
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公开(公告)号: US5680185A公开(公告)日: 1997-10-21
- 发明人: Hidekazu Kobayashi , Kiyohiro Samizu , Eiji Chino , Jin Jei Wu
- 申请人: Hidekazu Kobayashi , Kiyohiro Samizu , Eiji Chino , Jin Jei Wu
- 申请人地址: JPX Tokyo-to
- 专利权人: Seiko Epson Corporation
- 当前专利权人: Seiko Epson Corporation
- 当前专利权人地址: JPX Tokyo-to
- 优先权: JPX2-321779 19901126; JPX3-18750 19910212; JPX3-26024 19910220; JPX3-26025 19910220; JPX3-59126 19910322; JPX3-118619 19910523; JPX3-136170 19910607; JPX3-140008 19910612; JPX3-144583 19910617; JPX3-153116 19910625; JPX3-167972 19910709; JPX3-200716 19910809; JPX3-222982 19910903; JPX3-282703 19911029
- 主分类号: C09K19/38
- IPC分类号: C09K19/38 ; C09K19/54 ; G02F1/1334 ; G02F1/13363 ; G02F1/139 ; G02F1/136
摘要:
A polymer dispersed liquid crystal display apparatus has a liquid crystal/polymer medium formed between spatially disposed electrodes formed spatially disposed substrates. The medium includes a polymer phase and a liquid crystal phase having optical axes alignable together in a predetermined direction. A light absorption additive is included in the liquid crystal phase to provide light absorption when said optical axes are aligned in said predetermined direction so that in the presence or absence of an electric field applied between said electrodes, two different conditions are achieved comprising alignment and misalignment of the optical axes of the liquid crystal phase relative to the polymer phase so that in one condition, a light absorption state is created in the medium and in the other condition, a light scattering state is created in the medium. The polymer phase comprises a network including a plurality of continuous strings of particles connected in helicoid formation due to the addition of a chiral component, and this network may also include separate discrete polymer particles. Also a matrix network may be employed. A reflecting surface on the side of the liquid crystal/polymer medium opposite to that of incident light will enhance the light scattering and light absorbing properties in either of the two different conditions. Alternatively, the opposite side may be a white surface providing for a high contrast display with light absorption additive in the medium of dark contrast, such as, black dichroic dye.
公开/授权文献
- US4829893A Cereal-grain polishing apparatus 公开/授权日:1989-05-16
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