Patent ID: 7999464
Filing Date: 2011-08-16
Classification: C09K,H01L,H05B

Abstract:
1. A composite display device comprising: a substrate; first pixel electrodes disposed over one surface of the substrate; second pixel electrodes disposed over other surface of the substrate; a first insulating separation wall, which is disposed between the first pixel electrodes and forms the regions separated on the first pixel electrodes; a second insulating separation wall, which is disposed between the second pixel electrodes and forms the regions separated on the second pixel electrodes; a first inorganic luminescent layer disposed on the regions separated on the first pixel electrodes; a second inorganic luminescent layer disposed on the regions separated on the second pixel electrodes; a first opposite electrode disposed on the first inorganic luminescent layer; a second opposite electrode disposed on the second inorganic luminescent layer; a first thin-film transistor which applies a voltage across the first pixel electrodes and the first opposite electrode in a conduction state and causes the first inorganic luminescent layer to emit light; and a second thin-film transistor which applies a voltage across the second pixel electrode and the second opposite electrode in a conduction state and causes the second inorganic luminescent layer to emit light, wherein: the substrate, the first and second pixel electrodes, and the second opposite electrode have transparency, the second inorganic luminescent layer is located right behind a position of the first inorganic luminescent layer, a luminescent light of the first inorganic luminescent layer is transmitted through the first pixel electrode, the substrate, and the second pixel electrode, in this order, to be irradiated on the second inorganic luminescent layer, and transmitted through the second inorganic luminescent layer and the second opposite electrode to be emitted outside, and a luminescent light of the second inorganic luminescent layer is transmitted through the second opposite electrode to be emitted outside.