A light source for a contact image sensor, including an electroluminescent screen fastened to the scanning face glass of a contact image sensor at the back either by bonding or printing and having a narrow gap through which reflected light from document passes to the lens of the contact image sensor...http://www.google.fr/patents/US5491384?utm_source=gb-gplus-shareBrevet US5491384 - Light source for a contact image sensor
