US 12,353,655 B1
Touch sensor with pressure sensitive adhesive layer, touch panel, and image display device
Kensuke Katagiri, Kanagawa (JP); and Tianhua Ouyang, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Oct. 10, 2024, as Appl. No. 18/911,954.
Claims priority of application No. 2024-030303 (JP), filed on Feb. 29, 2024; and application No. 2024-087068 (JP), filed on May 29, 2024.
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G01L 1/14 (2006.01)
CPC G06F 3/041 (2013.01) [G01L 1/14 (2013.01); G06F 2203/04105 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A touch sensor with a pressure sensitive adhesive layer, comprising:
the touch sensor, and
the pressure sensitive adhesive layer disposed on one surface side of the touch sensor,
wherein the pressure sensitive adhesive layer includes a visible light absorber, and
the pressure sensitive adhesive layer has an internal absorbance Aa of 0.0004 to 0.03 and a parameter X of 20 to 3000 m−1, the internal absorbance Aa being calculated with Test X,
Test X: a visible light reflectance ρ0 of a support white plate is obtained by a method described in JIS R 3106:2019; a visible light reflectance ρx is obtained by making measurement light incident on a laminate formed by laminating the support white plate and the pressure sensitive adhesive layer from the pressure sensitive adhesive layer side of the laminate by the method described in JIS R 3106:2019; the internal absorbance Aa of the pressure sensitive adhesive layer is calculated from the visible light reflectance ρ0 and the visible light reflectance ρx by formula (1), and the parameter X (m−1) is calculated from the internal absorbance Aa calculated and a thickness Da (m) of the pressure sensitive adhesive layer by formula (2),
Aa=−log10{(ρx/ρ0)0.5}  Formula (1),
X=Aa/Da  Formula (2).