Abstract: An organic electroluminescent (EL) device includes at least one luminescent layer having an organic compound doped with a metal capable of acting as a donor dopant, in adjacent to a cathode electrode. The EL device ensures a diminished energy barrier in an electron injection from the cathode electrode into the luminescent layer, i.e., metal-doped organic compound layer, and thus a lowered driving voltage. The lowered driving voltage can be obtained regardless of the work function of the cathode material.

Abstract: The present invention teaches a flat panel display system for illuminating an icon having a shape. The system comprises a first set of illuminators for illuminating the icon with a first color light beam in response to a first signal. The first set comprises a first and second pair of electrodes. Each pair of the first set comprising a top electrode and a bottom electrode, wherein the top and bottom electrodes of the first pair overlapping to form a first overlap region. Moreover, the top and bottom electrodes of the second pair overlapping to form a second overlap region, wherein the first and second overlap regions outline the shape of the icon. Further, a second set of illuminators is incorporated for illuminating the icon with a second color light beam in response to a second signal, such that the second set comprises a third and fourth pair of electrodes.

Abstract: A power system for a display, particularly an electroluminescent display, includes a temperature sensor for sensing the temperature of the glass panel. A first power supply circuit supplies a first power output having a first average power and first peak power. A second power circuit generating a second power output having second average power greater than the first average power and a second peak power less than the first peak power.

Abstract: The present invention relates to and is limited by a multi-segmented electroluminescent lamp with lamp segments that are turned on at or near a AC current zero crossing. The electroluminescent lamp is also powered by an inverter.

Abstract: A small hand-held electronic apparatus with a field effect light emitting device wherein the life of an EL panel is expanded; light emitting efficiency is improved; the circuit is made compact; and the number of parts is reduced. When a control signal from a charge/discharge frequency control means becomes a low level, a first step-up selection SW is turned on and a first discharge means is turned off. At this time, a step-up device and a first step-up means are connected, and the first step-up means starts a step-up operation in response to a step-up clock signal. A reverse induction voltage generated by the step-up operation is rectified by a first rectifier means and is input to a light emitting device. The light emitting device charges and accumulates reverse induction voltage input at each clock of the step-up clock and emits light to provide an illuminating function.

Abstract: A display panel integrated with EL can be obtained by printing EL at the back of a light permeable substrate, and covering the front surface of the substrate and the rearface of EL with a moisture proof film for insulating and protecting the EL from the surrounding atmosphere. Alternatively, the film may cover the substrate and EL entirely. An indication mark is printed at the surface of the moisture proof film or the light permeable substrate. The light permeable front electrode, the light emission layer and the back electrode are successively printed to the rearface of the light permeable substrate. If the indication mark is printed on the surface of the substrate, the attenuation of decay of the light emission from the emission layer can be suppressed and the brightness of the display mark improved by not forming the insulation layer at the back of the substrate.