A liquid-crystal display device including a transmission-type liquid-crystal panel for displaying an image, a power source circuit for driving the liquid-crystal panel, a solar-cell panel disposed behind the liquid-crystal panel so as to be excited by external light transmitted through the liquid-crystal...http://www.google.ca/patents/US5742367?utm_source=gb-gplus-sharePatent US5742367 - Liquid-crystal display device having a stacked arrangement of an LCD for displaying an image, a liquid crystal shutter, and a solar cell panel 
