Organic electroluminescence element and image forming apparatus or portable terminal unit using thereof
First Claim
1. An organic electroluminescence element at least having, on a substrate, an anode for injecting holes, a luminous layer including a luminous zone, and a cathode for injecting electrons, characterized in that light emitted from the luminous layer is extracted to a surface opposed to the substrate, and an inverted V-like structure is formed in at least a part of an element forming surface of the substrate, the inverted V-like structure being higher than the luminous layer.
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Accused Products
Abstract
There are provided an organic electroluminescence element which is excellent in visibility and which can maintain a light emission performance with a high degree of efficiency, an image forming apparatus which is excellent in visibility and which can maintain a light emission performance with a high degree of efficiency, and a portable terminal unit which is lightweight and which has a long use life. The organic electroluminescence element incorporates at least, on a substrate, an anode for injecting holes, a luminous layer having a light emitting zone, a cathode for injecting electrons, wherein light radiated from the luminous layer is extracted through a surface opposed to the substrate, and an inverted V-like structure higher than the luminous layer is formed on at least a part of an element forming surface of the substrate.
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Citations
70 Claims
- 1. An organic electroluminescence element at least having, on a substrate, an anode for injecting holes, a luminous layer including a luminous zone, and a cathode for injecting electrons, characterized in that light emitted from the luminous layer is extracted to a surface opposed to the substrate, and an inverted V-like structure is formed in at least a part of an element forming surface of the substrate, the inverted V-like structure being higher than the luminous layer.
- 15. An organic electroluminescence element incorporating at least, on a substrate, an anode for injecting holes, a luminous layer having a light emitting zone and a cathode for injecting electrons, characterized in that a light emitting part including said luminous layer has an area which is greater than an area of an aperture through which light from said luminous layer is extracted.
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16. An organic electroluminescence element incorporating at least, on a substrate, an anode for injecting holes, a luminous layer having a light emitting zone and a cathode for injecting electrons, characterized in that a light emitting part including said luminous layer is formed in a plane having an nonparallel relationship with an aperture through which light from said luminous layer is extracted.
- 28. An organic electroluminescence element having at least, on a substrate, an anode for injecting holes, a luminous layer having a light emitting zone, and a cathode for injecting electrons, characterized by a light angle changing panel formed on an element forming surface of said substrate.
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49. An organic electroluminescence element incorporating a luminous layer having a light emitting zone between two electrodes, a substrate is provided at one of said electrode sides, and a light angle changing panel is provided at the other of said electrode sides.
- 50. An organic electroluminescence element incorporating at least, on a substrate, an anode for injecting holes, a luminous layer having a light emitting zone, and a cathode for injecting electrons, characterized in that light radiated from said luminous layer is extracted through a light extracting surface opposed to said substrate, not less than at least two semisphere-like micro lenses having sizes which are different from one another are formed on said light extracting surface.
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51. An organic electroluminescence element incorporating at least, on a substrate, an anode for injecting holes, a luminous layer having a light emitting zone, and a cathode for injecting electrons, characterized in that light radiated from said luminous layer is extracted through a light extracting surface opposed to said substrate, not less that at least two semisphere-like micro lenses having sizes which are different from one another are formed on said light extracting surface, and a flattening surface is formed on the light extracting surface side of the micro lenses so as to define a flat surface through the intermediary of an air layer and at least a part of contact points.
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70. An organic electroluminescence element incorporating a luminous layer having a light emitting zone between two electrodes, characterized in that a substrate is provided on one of said electrode sides, and semisphere-like micro lenses are provided on the other one of said electrode sides.
Specification