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AssigneesJapan Science and Technology Agency, Tsuyoshi Masuda, Tadaoki Mitani, Komatsu Seiren Co., Ltd.
InventorsTsuyoshi Masuda, Tadaoki Mitani, John Rennie, Kounosuke Uozumi
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An organic electroluminescence element having a thin film of organic compound containing at least a light-emitting layer interposed between an anode and a cathode is disclosed. This element is driven by utilizing the sheet resistance of the anode or the cathode in a manner such that the distribution of brightness or color in a single light-emitting plane is modulated with the elapse of time. For example, at least either of the anode and the cathode is furnished with not less than two connecting parts, voltages are applied severally to the connecting parts, and at least one of the factors, i.e. amplitude, frequency, phase, and offset of the voltage applied to each of the connecting parts is modulated. As a result, a completely novel organic electroluminescence element that is capable of causing the brightness and the color to be so modulated as to induce waving in a single light-emitting plane can be realized.
An organic electroluminescence element having a thin film of organic compound containing at least a light-emitting layer interposed between an anode and a cathode and causing the anode and the cathode to form planar electrodes forming light-emitting planes having a prescribed area, the organic electroluminescence element characterized by the fact that at least either of the anode and the cathode constituting the planar electrodes are connected via not less than two connecting parts to a power source and drive voltages differing in waveform are applied to at least part of these connecting parts.
A method for driving an organic electroluminescence element having a thin film of organic compound containing at least a light-emitting layer interposed between an anode and a cathode and causing the anode and the cathode to form planar electrodes forming light-emitting planes having a prescribed area, the method characterized by driving the element in a manner such that the brightness and/or the color passes through the state of different distribution in at least one light-emitting plane and the state of distribution of brightness and color in the light-emitting plane is modulated with the elapse of time.
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