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US 2022/0187633 A1Published application
Film and smart window comprising the same
AssigneeLms Co., Ltd.
InventorsDong Uk LEE, Ho Seong NA, Ji Tae KIM, Jong Yoon LEE, Sang Hyun YOON, Seong Yong YOON, Mi Young PARK
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Abstract
A film, in which a phase transition material is not applied on an entire surface thereof and a pattern form is provided so that the aesthetically superior film of which a color is not cloudy but bright may be obtained and which has a high visible light transmittance as well as superior thermochromic properties, and a smart window including the same.
Claims20
A film comprising:
- a base layer including one or more concave portions forming lines on a surface of the base layer;
- and
- a phase transition material which is present in the concave portions of the base layer, wherein the phase transition material is a material of which an infrared light transmittance is changed by heat,
- a transmittance T550 for light with a wavelength of 550 nm at a temperature of 25° C. is 57.5% or more, and
- an absolute value of ΔT2000 according to Equation 1 below is 10% or more:
- ΔT2000=T2000.L−T2000.H, [Equation 1]
- in Equation 1, T2000.L is a transmittance of the film for light with a wavelength of 2,000 nm at a temperature of 25° C., and T2000.H is a transmittance of the film for light with a wavelength of 2,000 nm at a temperature of 90° C.
4 more elements
Dependencies are inferred from the claim text.