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US Patent 7466295 Liquid crystal display

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Patent
Patent
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Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
0
Patent Number
74662950
Patent Inventor Names
Yoshio Koike0
Kazuya Ueda0
Kenji Okamoto0
Tsuyoshi Kamada0
Hidefumi Yoshida0
Date of Patent
December 16, 2008
0
Patent Application Number
108909770
Date Filed
July 14, 2004
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Patent Primary Examiner
‌
Sumati Lefkowitz
0
Patent abstract

The liquid crystal display comprises a first substrate 2 including a first pixel electrode 12a and a second pixel electrode 12b, a second substrate 4 with an opposed electrode 22 formed on, and a liquid crystal layer 6 sealed between the first substrate 2 and the second substrate 4. The thickness d1 of the liquid crystal layer 6 on the first pixel electrode 12a in the first pixel region 8R, 8G is larger than the thickness d2 of the liquid crystal layer 6 on the second pixel electrode 12b in the second pixel region 8B. The first pixel region 8R, 8G includes a first partial region 11a, and a second partial region 13a where the threshold voltage is higher than in the first partial region 11a. The second pixel region 8B includes a third partial region 11b, and a fourth partial region 13b where the threshold voltage is higher than in the third partial region 11b. The threshold voltage in the first partial region 11a and the threshold voltage in the third partial region 11b are equal to each other, and the threshold voltage in the second partial region 13a and the threshold voltage in the fourth partial region 13b are equal to each other. Thus, it is possible to prevent large changes in the chromaticity due to gradation and visual angle changes, which lead to the prevention of the occurrence of the coloring. Thus, it is possible to provide a liquid crystal display having good display quality.

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