Optical multilayer film, and optical component and display device comprising the same
AssigneeSkc Co., Ltd.
InventorsYoung Min Heo, Kyu-Hun Kim, Sechul Lee, Seungwon Lee
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Abstract
The optical multilayer film, which comprises a laminate in which a base layer, a primer layer, and a hard coat layer are sequentially laminated, has enhanced mechanical properties while preventing rainbow stains and a reduction in the visibility by adjusting the in-plane retardation of the base layer and the refractive indices of the respective layers. Thus, the optical component and the display device, which comprise the optical multilayer film, have excellent optical characteristics and can operate normally even in harsh environments.
Claims15
An optical multilayer film, which comprises a laminate in which a base layer, a primer layer, and a hard coat layer are sequentially laminated,
- wherein the base layer comprises a polyester resin and has a minimum in-plane retardation (Romin) of 85 nm or less, a change (|ΔRo|/|Δx|) in the in-plane retardation with respect to a displacement in the transverse direction of less than 550 nm/3 m, and a change (|ΔRth|/|Δx|) in the thickness direction retardation with respect to a displacement in the transverse direction of less than 700 nm/3 m,
- wherein when the refractive indices of the base layer, the primer layer, and the hard coat layer are n1, n2, and n3, respectively, they satisfy the following Equations (1) to (4):
- n3<n2<n1 (1)
- 0.10≤n1−n3≤0.15 (2)
- 0≤n1−n2≤0.10 (3)
- 0≤n2−n3≤0.10 (4), and
- wherein ΔRo is the change in the in-plane retardation, Δx is the displacement in the transverse direction, and the transverse direction is the width direction of the optical multilayer film.
Dependencies are inferred from the claim text.