US 12,130,408 B2
Anti-glare film; anti-glare article, touchscreen, and display device using same; and method for selecting anti-glare film
Masaharu Sato, Higashihiroshima (JP); Takayuki Fukuda, Okayama (JP); and Gen Furui, Okayama (JP)
Assigned to DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
Appl. No. 17/615,412
Filed by DAI NIPPON PRINTING CO., LTD., Tokyo (JP)
PCT Filed May 26, 2020, PCT No. PCT/JP2020/020740
§ 371(c)(1), (2) Date Dec. 28, 2021,
PCT Pub. No. WO2020/246314, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 2019-107214 (JP), filed on Jun. 7, 2019.
Prior Publication US 2022/0229208 A1, Jul. 21, 2022
Int. Cl. G02B 1/11 (2015.01); G02F 1/1335 (2006.01); G06F 3/041 (2006.01)
CPC G02B 1/11 (2013.01) [G02F 1/133502 (2013.01); G06F 3/041 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An anti-glare film comprising an anti-glare layer, wherein
the anti-glare layer has a 500-μm square area, as measured for surface roughness, satisfying condition 1 and condition 2 below, where the maximum peak height is defined as P, a plane having a height obtained by adding P/6 to the average height is defined as a first reference plane, the number of projections exceeding the first reference plane is defined as N1, a plane having a height obtained by adding P/3 to the average height is defined as a second reference plane, and the number of projections exceeding the second reference plane is defined as N2:
P is 0.20 μm or more and 1.20 μm or less; and  <condition 1>
0.20≤N2/N1≤0.45.  <condition 2>.