Liquid-crystal display device having a stacked arrangement of an LCD for displaying an image, a liquid crystal shutter, and a solar cell panel

摘要

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 panel for generating electromotive force to thereby charge the power source circuit, and a liquid-crystal shutter provided between the liquid-crystal panel and the solar-cell panel for controlling the amount of external light to be transmitted to the solar- cell panel. In the device, the power source circuit can be sufficiently charged by the electromotive force from the solar-cell panel to prolong the operating time of the displayed device without increasing the area for installation of the solar-cell panel.