发明名称 |
Liquid crystal display device wherein a deviation in gray level for displaying a still image in one frame period is less than or equal to 1.2% of a maximum gray level |
摘要 |
A novel liquid crystal display device without a decrease in display quality. The liquid crystal display device includes a pixel for displaying a still image at a frame frequency of less than or equal to 1 Hz, and a liquid crystal layer in the pixel has a dielectric constant anisotropy of greater than or equal to 2 and less than or equal to 5. With the above structure, a change in voltage applied to a pixel can be kept within an acceptable range of a deviation in gray level for displaying the same still image. Thus, flickers due to a low refresh rate can be reduced, which leads to an increase in display quality. |
申请公布号 |
US9129568(B2) |
申请公布日期 |
2015.09.08 |
申请号 |
US201314078693 |
申请日期 |
2013.11.13 |
申请人 |
Semiconductor Energy Laboratory Co., Ltd. |
发明人 |
Kubota Daisuke;Hirakata Yoshiharu;Hatsumi Ryo |
分类号 |
C09K19/02;G02F1/133;G09G3/36;G02F1/139;G02F1/137 |
主分类号 |
C09K19/02 |
代理机构 |
Nixon Peabody LLP |
代理人 |
Nixon Peabody LLP ;Costellia Jeffrey L. |
主权项 |
1. A liquid crystal display device comprising a pixel for displaying a still image at a frame frequency of less than or equal to 1 Hz, wherein the pixel comprises a liquid crystal layer having a dielectric constant anisotropy of greater than or equal to 2 and less than or equal to 5 and wherein a deviation in gray level for displaying the still image in one frame period is less than or equal to 1.2% of the maximum gray level. |
地址 |
Kanagawa JP |