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US 2025/0028099 A1Published application
Optical film and display device comprising same
AssigneeKolon Industries, Inc.
InventorsHyoKyung LEE, Hyojun PARK
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Abstract
Disclosed is an optical film including a light-transmitting substrate, the optical film having a yellowness index before a light resistance test of 5.0 or less and a color change (ΔE*ab) after the light resistance test of 3.5 or less, and a display device including the same.
Claims9
An optical film comprising a light-transmitting substrate, the optical film having a yellowness index before a light resistance test of 5.0 or less and a color change (ΔE*ab) after the light resistance test of 3.5 or less,
- wherein the light resistance test is performed under the following conditions [daylight filter, 12 kW, 0.8 W/m2, @420 nm, 30° C./30 RH % chamber and 55° C. black panel] using a Xenon lamp for 300 hours, and the color change (ΔE*ab) is calculated by the following Equation 1:
- Δ
-
- E
- ab
- *
- =
- [
- (
- Δ
-
- L
- *
- )
- 2
- +
- (
- Δ
-
- a
- *
- )
- 2
- +
- (
- Δ
-
- b
- *
- )
- 2
- ]
- 1
- /
- 2
- 〈
- Equation
-
- 1
- 〉
- wherein ΔL* is a difference between L* before the light resistance test and L* after the light resistance test, Δa* is a difference between a* after the light resistance test and a* before the light resistance test, and Δb* is a difference between b* after the light resistance test and b* before the light resistance test.
38 more elements
Dependencies are inferred from the claim text.