Patent ID: 7608992

Claim:
An organic electro-luminescence display device comprising: an optically transparent substrate; first pixels formed over the optically transparent substrate, each of the first pixels including a first organic electro-luminescence element which includes a first optically transparent and electrically conductive layer, an organic layer including a light-emitting layer, a second optically transparent and electrically conductive layer, and a first optically reflective and electrically conductive layer in order, the organic layer configured to transform electric energy applied between the first optically transparent and electrically conductive layer and the second optically transparent and electrically conductive layer into light, the first optically reflective and electrically conductive layer configured to reflect light, and the first pixel configured to emit light towards a first surface of the organic electro-luminescence display device; and second pixels formed over the optically transparent substrate, each of the second pixels including a second organic electro-luminescence element which includes a second optically reflective and electrically conductive layer, the first optically transparent and electrically conductive layer, the organic layer including the light-emitting layer, and the second optically transparent and electrically conductive layer in order, the second optically reflective and electrically conductive layer configured to reflect light, and the second pixel configured to emit light towards a second surface of the organic electro-luminescence display device, the second surface being opposite to the first surface.