Printed Electronics

This first video show the development with a graduate class working on a printed capacitive smart label developed for a pharma UV-sensitive skin lotion. This video shows a demonstrator from 2015 that was designed and produced entirely at Cal Poly and provided to all attendees of the Flex Conference in Monterey. It uses screen printed conductive inks, a flexible battery and novel switches to activate a 2-color LED. This video below uses a thermochromic ink screen printed on top of printed heating elements. Designed to “reveal” stars and some type, the heating element is powered by a conventional 9v battery. This early demonstrator was designed as a simple origami piece that would constructor correctly, lit two LEDs from novel switches. In 2011, the world’s first electrochromic magazine cover was developed at Cal Poly. Using redox reactions to “switch” colored elements, the novel cover used coins to activate the printed electrochromic components. This printed thermal sensor was developed in conjunction with PST Sensors. The graphics and printed traces were produced at Cal Poly. This award winning demonstrator, lead by Dr. Ulrich Moosheimer from University of München, demonstrates the use of electrochromic printed inks used in a timer circuit, integrating with an inductively charged battery..