2009

Single-Layer Electrochromic Polymer Technology for Automotive and Architectural Glazing Light Control

DuPont’s electrochromatic (EC) technology for controllable light transmission in automotive and architectural safety glazing applications is based on an organic polymer film that can function as a controllable EC interlayer. This technology addresses the need for reducing the complexity of current EC technologies and can be used in rigid and flexible forms, large sizes, and curved shapes. It has applications in dynamic electrochromic glazing systems that undergo a reversible change in color from light to dark by application of a very low voltage. Target markets in automotive include sunroofs, mirrors, instrument clusters, windshield shadebands, sidelights, and backlights. The technology works either in transmissive or reflective mode. Transmissive EC devices are made with indium tin oxide electrodes that are fully transparent in the visible spectral range. All of the components of the electronic control systems are commercially available.

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