The present invention relates to a method and device for integrating solar cell on LCD panels for photovoltaic electricity generation for portable electronic devices. According to one embodiment of the present invention, the black matrix region on the color filter substrate in a LCD panel is replaced by a solar cell region. A lens array substrate is coupled between the light source layer and the TFT to focus the backlight to increase the solar cell layer area while maintaining high fill ratio of the LCD pixels. The solar cell material is selected from at least silicon, a single crystal silicon, poly-crystalline silicon, amorphous silicon, gallium arsenide, cadmium telluride, copper indium diselenide, organic/inorganic, or hybrid cells. The substrate material is selected from glass, metal, plastic or polymer.