LED light-bulbs (patent number:)5, DC 12 V and 24 V LED flat light-emitting lamp panel solar PV system is the preferred source.

LED调光灯泡（专利号：）5，直流12伏和24伏的LED平面发光灯盘是太阳能光伏发电系统的首选光源。

youdao

In the top diagram the solar panel is completely exposed to a light source 1804 and all six electrode quadrants 1802 are producing electricity more or less equally.

FORBES: Patent Approval Paves Way For Apple To Fire Up Solar Powered iPhone

The key advantage for OLED is that the panel itself emits light, eliminating the need for a light source behind it and keeping the overall structure very thin and light.

WSJ: TV Makers Seek Fatter Profits in Thinner Sets