Invention Grant
- Patent Title: Cover member for input pen device, and input pen device
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Application No.: US16650162Application Date: 2018-08-28
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Publication No.: US11036314B2Publication Date: 2021-06-15
- Inventor: Naoki Fujita , Shinsaku Nishida
- Applicant: NIPPON ELECTRIC GLASS CO., LTD.
- Applicant Address: JP Otsu
- Assignee: NIPPON ELECTRIC GLASS CO., LTD.
- Current Assignee: NIPPON ELECTRIC GLASS CO., LTD.
- Current Assignee Address: JP Otsu
- Agency: Cantor Colburn LLP
- Priority: JPJP2017-183970 20170925
- International Application: PCT/JP2018/031677 WO 20180828
- International Announcement: WO2019/058889 WO 20190328
- Main IPC: G06F3/0354
- IPC: G06F3/0354 ; C03C19/00 ; G06F3/041

Abstract:
A cover member for an input device is disposed on a front-surface side of a display device in the input device includes recesses and protrusions on at least one principal surface. In the principal surface having recesses and protrusions, when a cutoff value for a high-pass filter λc is set to 1.6 times the pitch of the recesses and protrusions of a measured cross-sectional curve and a cutoff value for a low-pass filter λs is set to 25 μm, the maximum roughness height Rz of the recesses and protrusions is 3-1000 nm and the pitch RSm of the recesses and protrusions is 50-1000 μm, and when the cutoff value of the high-pass filter λc is set to 25 μm, the three-dimensional arithmetic mean height Sa of the recesses and protrusions is 1-50 nm and the pitch RSm of the recesses and protrusions is 0.01-10 μm.
Public/Granted literature
- US20200301521A1 COVER MEMBER FOR INPUT DEVICE, AND INPUT DEVICE Public/Granted day:2020-09-24
Information query
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