发明授权
- 专利标题: Liquid crystal display device and manufacturing method thereof
- 专利标题(中): 液晶显示装置及其制造方法
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申请号: US10274966申请日: 2002-10-22
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公开(公告)号: US06900853B2公开(公告)日: 2005-05-31
- 发明人: Kunihiko Watanabe , Masahiro Ukisu , Tomoyuki Ariyoshi , Mitsuo Nakatani , Masahiko Suzuki , Hideki Kuriyama , Keiichiro Ashizawa
- 申请人: Kunihiko Watanabe , Masahiro Ukisu , Tomoyuki Ariyoshi , Mitsuo Nakatani , Masahiko Suzuki , Hideki Kuriyama , Keiichiro Ashizawa
- 申请人地址: JP Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: Reed Smith LLP
- 代理商 Stanley P. Fisher, Esq.; Juan Carlos A. Marquez, Esq.
- 优先权: JP2001-322951 20011022
- 主分类号: G02F1/1343
- IPC分类号: G02F1/1343 ; G02F1/1333 ; G02F1/1362 ; G02F1/136 ; G09G3/36 ; H01L31/20
摘要:
A liquid crystal display device is provided with a pair of substrates which are arranged to face each other in an opposed manner and a liquid crystal layer which is sandwiched between main surfaces of a pair of substrates. On the main surface of one of the pair of substrates which faces the liquid crystal layer, pixel regions including switching elements, pixel electrodes which are connected to the switching elements and a protective film which is disposed at liquid crystal layer side of the switching elements are formed. In such a liquid crystal device, the protective film is formed by laminating the plurality of material layers which include at least a first material layer and a second material layer which is arranged closer to the liquid crystal layer side than the first material layer. Further, the second material layer exhibits resistivity which is lower than resistivity of the first material layer and higher than resistivity of silicon or semiconductor layers which constitute channels of the switching elements. Due to such a constitution, the image retention which is generated on a display screen of the liquid crystal display device can be reduced.
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