Chromogenics Ab

Forskarpatent I Uppsala Ab

Chromogenics Sweden Ab

Claes Goran Granqvist

Andris Azens

Richard Karmhag

Greger Gustavsson

Lisen Kullman

An illumination system () is based on a window () having controllable transmittance and a light guide system () arranged for transferring light from a light guide input () to a light guide output (). The light guide output is located in a same space () as the window (), but at a distance therefrom (). The illumination system includes elements for balancing () the transmittance of the window and a throughput of the light guide system. Preferably, the window is an outer window, the light guide input () is arranged for gathering day light and the light guide output () is arranged to illuminate an area () within sight from the window (). Preferably the transmittance of the window () and/or the light throughput of the light guide system () are controlled. A method for illuminating a space () having a window () with controllable transmittance is presented.

Indoor light balancing

A manufacturing method of electrochromic devices () includes the steps of providing a first and second sheet including a first () and second () plastic substrate, respectively, at least partially coated with a first () and second () electron conducting layer, respectively. The first sheet is at least partially coated with a first electrochromic layer (). The second sheet is at least partially coated with a counter electrode layer (). The first and second sheets are laminated with an electrolyte layer () interposed in-between into an electrochromic laminate sheet (). The electrochromic device is at least partially defined by forming a seal () through the electrochromic laminate sheet () at a distance (D) from a peripheral edge (). The distance (D) is preferably larger than the mean diffusion lengths of oxygen, water or an electrolyte component in the electrolyte during a predetermined time period.

Manufacturing of electrochromic devices

The present invention discloses a color-modifying method, which comprises the provision of a metal oxide thin film ( ) based on Ni and/or Cr. The method is characterized in that, when coloring the metal oxide film ( ), exposing the metal oxide thin film to ozone, and when bleaching the metal oxide film, exposing the metal oxide film to UV radiation ( ). A lamination process or a deposition of another thin film may follow the exposure. Preferably, exposing the metal oxide thin film ( ) to ultraviolet radiation ( ) in an oxygen-containing atmosphere ( ) provides the ozone exposure and exposing the metal oxide thin film to ultraviolet radiation ( ) in an oxygen-free atmosphere ( ) provides the ultraviolet exposure.

Growing community of inventors

Uppsala, Sweden

Claes Goran Granqvist