US 11,740,501 B2
Image display device that can display high brightness and high contrast images and includes a cured resin layer
Yoshihisa Shinya, Tochigi (JP); and Yusuke Kamata, Tochigi (JP)
Assigned to DEXERIALS CORPORATION, Tokyo (JP)
Filed by DEXERIALS CORPORATION, Shimotsuke (JP)
Filed on Dec. 16, 2021, as Appl. No. 17/552,851.
Application 17/552,851 is a continuation of application No. 16/909,943, filed on Jun. 23, 2020, granted, now 11,237,423.
Application 16/909,943 is a continuation of application No. 16/216,525, filed on Dec. 11, 2018, granted, now 10,725,329, issued on Jul. 28, 2020.
Application 16/216,525 is a continuation of application No. 14/721,748, filed on May 26, 2015, granted, now 10,216,026, issued on Feb. 26, 2019.
Application 14/721,748 is a continuation of application No. 12/450,232, abandoned, previously published as PCT/JP2008/057024, filed on Apr. 9, 2008.
Claims priority of application No. 2007-102252 (JP), filed on Apr. 9, 2007; application No. 2007-186360 (JP), filed on Jul. 17, 2007; and application No. 2008-005027 (JP), filed on Jan. 11, 2008.
Prior Publication US 2022/0107520 A1, Apr. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1335 (2006.01); G02F 1/1333 (2006.01); C08F 290/06 (2006.01); C08L 51/00 (2006.01)
CPC G02F 1/1335 (2013.01) [C08F 290/067 (2013.01); C08L 51/003 (2013.01); G02F 1/133308 (2013.01); G02F 1/133502 (2013.01); C08L 2203/20 (2013.01); G02F 1/133331 (2021.01); G02F 2201/50 (2013.01); G02F 2202/023 (2013.01); G02F 2202/28 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An image display device comprising:
an image display part;
a light-transmitting protective part arranged on the image display part;
a polarizing plate arranged on a surface of the image display part; and
a cured resin layer disposed on the polarizing plate and arranged between the image display part and the protective part,
wherein the cured resin layer is a cured product of a photocurable resin composition comprising (i) at least one kind of polymer selected from the group consisting of a polyurethane acrylate, a polyisoprene acrylate or an ester thereof, a hydrogenated terpene resin, and a butadiene polymer; and (ii) a photopolymerization initiator, and has:
a light transmittance in a visible region of 90% or more,
a refractive index (nD) of 1.45 or more and 1.55 or less, and
a storage modulus at 25° C. of 1.0×103 to 1.0×106 Pa to function as an adhesive between the image display part and the protective part.
 
10. A photocurable resin composition for forming a cured resin layer that is arranged between an image display part of an image display apparatus and a light-transmitting protective part and disposed on a polarizing plate that is arranged on a surface of the image display part, the photocurable resin composition comprising:
at least one kind of polymer selected from the group consisting of a polyurethane acrylate, a polyisoprene acrylate or an ester thereof, a hydrogenated terpene resin, and a butadiene polymer; and
a photopolymerization initiator,
wherein the photocurable resin composition has a curing shrinkage ratio of 5.0% or less, and
a cured resin formed by curing the photocurable resin composition has:
a light transmittance in a visible region of 90% or more,
a refractive index (nD) of 1.45 or more and 1.55 or less and
a storage modulus at 25° C. of 1.0×103 to 1.0×106 Pa to function as an adhesive between the image display part and the protective part.
 
12. A cured resin layer arranged between an image display part of an image display apparatus and a light-transmitting protective part and disposed on a polarizing plate that is arranged on a surface of the image display part, the cured resin layer being a cured product of a photocurable resin composition comprising (i) at least one kind of polymer selected from the group consisting of a polyurethane acrylate, a polyisoprene acrylate or an ester thereof, a hydrogenated terpene resin, and a butadiene polymer; and (ii) a photopolymerization initiator, wherein the cured resin layer has:
a light transmittance in a visible region of 90% or more,
a refractive index (nD) of 1.45 or more and 1.55 or less, and
a storage modulus at 25° C. of 1.0×103 to 1.0×106 Pa to function as an adhesive between the image display part and the protective part.