The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 2026
Filed:
Jun. 29, 2023
Nippon Electric Glass Co., Ltd., Otsu, JP;
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Abstract
Provided is a top panel for a tactile sense presentation device in which the top panel can have a sufficiently wide range of changes in frictional force and thus effectively increase the expressiveness of the tactile sense. A top panelfor a tactile sense presentation device is for use in a tactile sense presentation device, has an outer principal surfacelocated on an exterior side of the tactile sense presentation device, and includes ruggedness provided on at least a portion of the outer principal surface, wherein the ruggedness includes: first ruggedness in which where a cutoff value of a high-pass filter λcis five times a spacing between ruggedness in a measured total profile of the outer principal surfaceand a cutoff value of a low-pass filter λsis 26.6 μm, a maximum height of the ruggedness is 0.5 nm to 2000 nm and a spacing between the ruggedness is 50 μm to 2000 μm; and second ruggedness in which where a cutoff value of a high-pass filter λcis 14 μm and a cutoff value of a low-pass filter λsis 0.35 μm, a three-dimensional arithmetical mean height Sa of the ruggedness is 0.5 nm to 100 nm and a maximum height Sz of the ruggedness is 8 nm or more.