Invention Grant
- Patent Title: Liquid crystal display device, voltage setting method for liquid crystal display device and method for producing liquid crystal display device
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Application No.: US17151431Application Date: 2021-01-18
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Publication No.: US11308905B2Publication Date: 2022-04-19
- Inventor: Yoshimasa Yagi , Masatoshi Itoh , Shogo Nishiwaki , Hisashi Nagata
- Applicant: SHARP KABUSHIKI KAISHA
- Applicant Address: JP Sakai
- Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee: SHARP KABUSHIKI KAISHA
- Current Assignee Address: JP Sakai
- Agency: ScienBiziP, P.C.
- Main IPC: G09G3/36
- IPC: G09G3/36

Abstract:
A liquid crystal display device includes a liquid crystal display panel including a plurality of pixels, and a control circuit configured to generate a source signal voltage supplied to each pixel. The liquid crystal display panel includes an active matrix substrate including a pixel electrode applied with a source signal voltage and a common electrode applied with a common voltage. The common voltage and the source signal voltage corresponding to each gradation are set such that a source-common center difference at least one of lowest and highest gradation levels is greater than the source-common center difference at least some of the other gradation levels. A degree of symmetry of a gradation level voltage is equal to or lower than 95% at least at one of gradation levels equal to or lower than a 127/255-th gradation level except for the lowest gradation level.
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