The idea of the demonstrator is combining science and art together to create something beautiful and functional that could belong on the wall of anyone. The demonstrator also highlight the use of printed and organic electronics in energy autonomous IoT devices. It is a flexible screen printed display which is turned on and off by a printed capacitive touch sensor, hidden in the painting. The display has been designed in the style of Van Goghs Starry Night‘ and is powered by silicon solar cells which charge up commercial supercapacitors. Viewers can touch the moon in the display to activate the display.
13 layers are screen printed to create the electrochromic display. These layers need to be aligned for the device to function and the materials used include: PEDOT:PSS (a common organic electronic material, without which, this demonstrator would not function), an isolating layer, an in house electrolyte, carbon and silver. A graphical layer print of the city scape of Norrkoping, Sweden was printed and laminated on top of the screen-printed stack with the sky having 80-90% transparency to allow visibility of the electrochromic layer. The capacitive touch sensor was printed on the graphical layer, after many trials and error for functionality and best performance. Traditional electronic controllers were designed to allow the silicon solar cells to charge the supercapacitors and in turn, turn on and off the display via the capacitive touch sensor. A 9 V battery is also included if the device is used extensively or there is not enough light for functionality.
- (Electrochromic) Display Market
Attractiveness of the Product
- Bridges gap between art and science
- Highlights the use of printed and organic electronics in energy autonomous IoT devices
Printed Electronics Components
- Printed conductive path
- Printed capacitive switch
- Printed sensors
- Printed electrode
- Electrochromic Display
- Organic semiconductor
- Printed dielectric / insulator