| 摘要 |
A lighting device (100) can include a substrate (115), two or more light-emitting elements (105, 109) formed over the substrate, an affixing layer (113) fixing the two or more light-emitting elements in place, and a transparent conductive layer (103) in electrical contact with the light-emitting elements. The substrate (115) and the transparent conductive layer (103) sandwich the affixing layer (113) with the light-emitting elements (105, 109) in place. The affixing layer (113) is an electrically insulating material. The affixing layer (1 13) is doped with a photo active or photochromic material. In a first mode when the light-emitting elements (105, 109) are energized, the photo active or photochromic material of the affixing layer (113) is excited by the light-emitting elements. In a second mode when the light- emitting elements (105, 109) are de-energized, the affixing layer (113) produces a persistent luminescence. |
