US 12,138,957 B2
Decoration member and manufacturing method therefor
Jin Suk Song, Daejeon (KR); Sangcholl Han, Daejeon (KR); Yong Chan Kim, Daejeon (KR); Nansra Heo, Daejeon (KR); Jeong Woo Shon, Daejeon (KR); and Pilsung Jo, Daejeon (KR)
Assigned to LG CHEM, LTD., Seoul (KR)
Appl. No. 16/960,371
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Jan. 8, 2019, PCT No. PCT/KR2019/000273
§ 371(c)(1), (2) Date Jul. 7, 2020,
PCT Pub. No. WO2019/135667, PCT Pub. Date Jul. 11, 2019.
Claims priority of application No. 10-2018-0002278 (KR), filed on Jan. 8, 2018.
Prior Publication US 2021/0061000 A1, Mar. 4, 2021
Int. Cl. B44F 1/02 (2006.01); B44F 1/08 (2006.01)
CPC B44F 1/02 (2013.01) [B44F 1/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A decorative member comprising:
a substrate; and
a decorative layer provided on the substrate,
wherein the decorative layer has a pattern of protrusions arranged in one dimension and a pitch in a one-dimensional direction of the pattern is smaller than 1 mm, or arranged in two dimensions and each pitch in a two-dimensional direction of the pattern is smaller than 1 mm, wherein the protrusions have an asymmetrical structure,
wherein the asymmetrical structure comprises:
an asymmetrical conical shape, wherein (i) the asymmetrical conical shape, when viewed from an upper surface thereof, has a structure with a base and a vertex of the conical shape on a line perpendicular to the base, and the position of the vertex is a point that does not coincide with the center of gravity of the base; or
(ii) the base of the asymmetrical conical shape has an asymmetrical polygonal or elliptical shape,
wherein the decorative layer comprises a light reflection layer provided on the substrate and a light absorption layer provided on the light reflection layer, or a light absorption layer provided on the substrate and a light reflection layer provided on the light absorption layer,
wherein the light reflection layer has a thickness of 1 nm or more, and the light absorption layer has a thickness of 5 to 500 nm,
wherein the light reflection layer or the light absorption layer comprises two or more points having different thicknesses,
wherein the light reflection layer has a light reflectance of 50% or more,
wherein the light absorption layer has a refractive index (n) at 380 nm to 780 nm of 0 to 8, and an extinction coefficient (k) at 380 nm to 780 nm of more than 0 and not more than 4,
wherein the light reflection comprises one or more materials selected from indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium, (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag), an oxide, nitride or oxynitride thereof, or one or more materials of carbon and carbon composites,
wherein the light absorption layer one or more materials selected from indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au) and silver (Ag), or an oxide, nitride or oxynitride thereof,
wherein, when a direction perpendicular to a plane of the decorative layer is defined as an x-axis, a direction on a surface of the decorative layer is defined as a y-axis, and a central point of the width of the y-axis on the decorative layer is detected using a detector under a condition of standard illuminant D65 in a wavelength range of 380 nm<λ≤780 nm, an angle formed by a line connecting the center of the detector to the central point of the width of the y-axis on the decorative layer with the x-axis on the x-y axis plane is defined as a central viewing angle φv, a distance from the center of the detector to the central point of the width in the y-axis direction on the decorative layer is defined as Dv, and a depth parameter value δ1m represented by the following Formula 1 in at least a part of the central viewing angle φv from −15° to +15° is 0.15 or more:
δ1m=|Δh|max/Dv  [Formula 1]
wherein |Δh|max is the maximum value of Δh represented by the following Formula 2:

OG Complex Work Unit Math
wherein Δd is represented by the following Formula 3:
Δd=r(φe+0.15°)−r(φe−0.15°)  [Formula 3]
wherein
φe is defined as a viewing angle formed by a line connecting the center of the detector to any point on the y axis on the decorative layer detected by the detector with the x-axis on the x-y axis plane; and
r(φe+0.15°) and r(φe−0.15°) are represented by the following Formula 4 and the following Formula 5, respectively:
r(φe+0.15°)=Dv×√f(φe+0.15°)/f(φe)  [Formula 4]
r(φe−0.15°)=Dv×√f(φe−0.15°)/f(φe)  [Formula 5]
wherein f(φe), f(φe+0.15°) and f(φe−0.15°) are angular luminances at viewing angles (φe), (φe+0.15°) and (φe−0.15°), respectively,
wherein φe satisfies the range of the following Formula 6:
−tan−1(100 mm/2Dv)+0.15°+φv=φe,min≤φe≤φe,max=tan−1(100 mm/2Dv)−0.15°+φv  [Formula 6]
wherein φe,min and φe,max are the minimum and the maximum of φe, respectively.