Laminated display based on printed electronics

Ludvigsson, M., Leisner, P., Schödt, B., Dyreklev, P., Nilsson, D., Norberg, B., Grund Bäck, L., Malmros, I., Clausén, U., Andersson Ersman, P.
Type of publication: 
Conference item

Transparent intelligence, functional glass and smart windows are important areas of development for the global glass industry. Transparency is vital for quality of life. Functionalities such as solar control and low emissivity coatings are necessary constituents in the climate shell of an energy efficient building. Information technology has become a part of the modern infrastructure and internet of things will be incorporated in the glass solutions of tomorrow. 

Glafo the Swedish Glass research Institute, the electronics department at SP Technical Research Institute of Sweden and Acreo Swedish ICT investigated the possibility and challenges related to the lamination of printed electronic displays between two glass panes. These investigations resulted in proof of concept of such a laminated display located a few centimeters away from the edges of the glass pane, see Figure 2.

The printed electronic display was achieved by using screen printing technology developed at Acreo Swedish ICT. The conductive polymer PEDOT:PSS (poly (3,4-ethylenedioxythiophene):poly(4-styrenesulfonate)) served as the active material, see Figure 1 (left), which is transparent and blue in its oxidized and reduced state, respectively. The middle diagram in Figure 1 shows the absorbance behavior of the polymer. The technology allows for both opaque and transparent displays; this study investigates an opaque version. The lamination of the display was performed at the Swedish company Forserum Safety Glass using two pieces of 4 mm float glass panes and EVA (ethyl vinyl acetate).

The laminated displays were investigated in a climate chamber at different settings of temperature and humidity and compared with reference displays that were not laminated, see Figures 3-7. It was obvious that the laminated displays performed better than the reference displays.  Some challenges were identified during the lamination process. The display moved and changed position with as much as one centimeter. Due to this, some samples lost contact with the external power source.  In Figure 2, it can also be seen how the display is evaporating gases during the lamination process, creating bubbles around the display. These are challenging opportunities for optimization of the lamination process and the design of the display that will be investigated in further studies.

Official URL:
Glasstec - Engineered Transparency 2016 Düsseldorf
Published in: 
Engineered Transparency 2016