New flexible smart window with better optical and reliability performance at a lower cost

A UK startup is sharing demonstrators of a novel bistable smart window technology that only needs power for switching. The optically superior film is highly customisable. Technical cooperation is sought with manufacturers of smart windows and display cabinets.

Smart windows have been around for years. They are (almost) excellent in offering privacy and comfort to people who wish to switch their windows between clear and opaque state. Different technologies exist with different features, such as electrochromic and Polymer Dispersed Liquid Crystal (PDLC). They have slight weaknesses such as having a tinted shade or haziness in the clear state, slow switching, and poor viewing angle. A bigger problem for the latter is constant energy consumption. What is common to them both is high cost, which has prohibited a wider uptake. A UK University spinout is testing new technology that promises to solve all the said problems and do this at a lower cost. The biggest eventual markets are automotive and architectural applications. This remains a target however the company particularly seeks early adopters in different markets that can make use of smaller areas (like a rooflight as opposed to a glass facade). The company has developed a new type of switchable material which is stable over a wide temperature range, and has been switched 27 million times without failure. The manufacturing process has been designed with roll-to-roll (R2R) manufacturing in mind and a prototype R2R manufacturing system has been built. The new technology also reduces infra-red/heat transmission and can in future provide a fully automated solution to regulate light and temperature inside the vast glass areas and facades in modern cities, saving energy on both heating and cooling. The picture shows a tiled demonstrator with the new technology. Large areas can be covered and the devices can also be pixelated down to 300dpi. The opacity is continually variable from transparent to translucent and the translucent state can be coloured. The technology has been developed for flexible plastic sheets but can also be applied directly to glass or be laminated into glass. In clear state, it is clearer than the other smart windows on the market (see further pictures below). Energy is consumed whilst switching but not in the steady states. The company seeks technical cooperation with manufacturers of smart windows or of regular windows and privacy solutions who want to diversify into smart windows. The aim is to validate the technology on real life products with solutions bigger than those in the pictures. Longer term projects under technical cooperation are also sought with smart cities, buildings and transport in mind.