Flexible electrochromic device
AssigneeSkc Co., Ltd.
InventorsSeung Bae Oh, Yong Sang La, Seong Hwan Lee, Jongmin Shim, Il Hwan Yoo, Byeong Uk Ahn
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Abstract
The embodiments relate to an electrochromic device having flexibility while achieving an excellent light transmission variable function based on the electrochromic principle. The electrochromic device comprises a light transmission variable structure interposed between a first base layer and a second base layer, wherein the light transmission variable structure comprises a first chromic layer and a second chromic layer, and the value of ΔTTd24 as defined in Equation (1) is 3% or less.
Claims8
An electrochromic device, which comprises a light transmission variable structure interposed between a first base layer and a second base layer,
- wherein the light transmission variable structure comprises a first chromic layer and a second chromic layer,
- wherein the first chromic layer comprises a reducing chromic material and a polymer resin,
- wherein the polymer resin is one or more selected from the group consisting of silicone-based resins, acrylic-based resins, phenolic-based resins, polyurethane-based resins, polyimide-based resins, or ethylene vinyl acetate-based resins,
- wherein the value of ΔTTd24 as defined in the following Equation (1) is 3% or less:
- ΔTTd24(%)=|TTd24−TTd0| (1)
- wherein, in Equation (1), TTd0 is the average transmittance (%) of visible light in the maximum decolored state when electric power is applied after the electrochromic device is deformed to have a radius of curvature of 17 mm,
- wherein TTd24 is the average transmittance (%) of visible light measured after TTd0 is measured, the electric power is turned off, and the electrochromic device deformed to have a radius of curvature of 17 mm is maintained for 24 hours, and
- wherein the electrochromic device has no cracks when it is deformed to have a radius of curvature of 70 mm.
Dependencies are inferred from the claim text.