Light emitting device
First Claim
1. A light emitting device comprising:
- an organic electroluminescence element including an organic light emitting layer including plural light emitting layers having different dominant emission wavelengths, which are stacked, said organic light emitting layer being configured to emit light rays of said different dominant emission wavelengths through a light emission surface of said organic light emitting layer; and
a diffractive optical element placed over said light emission surface of said organic light emitting layer,wherein;
said diffractive optical element is designed to have different grating patterns such that the light rays are diffracted by said grating patterns in such a manner to travel in a predetermined direction; and
said different grating patterns comprise diffraction angles different from each other in relation to an incident light ray of a same wavelength.
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Accused Products
Abstract
The light emitting device includes an organic electroluminescent element (20) and a diffractive optical element (30). The organic electroluminescent element (20) includes an anode layer (21), a cathode layer (22), and plural light emitting layers (231 and 232) interposed between the anode layer (21) and the cathode layer (22) and configured to emit light rays with different wavelengths. The diffractive optical element (30) is positioned in paths of light rays emitted from the organic electroluminescent element (20). The diffractive optical element (30) is designed to have different grating patterns (311 and 312) diffracting the light rays respectively emitted from the light emitting layers (231 and 232) for reducing chromatic aberration.
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Citations
24 Claims
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1. A light emitting device comprising:
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an organic electroluminescence element including an organic light emitting layer including plural light emitting layers having different dominant emission wavelengths, which are stacked, said organic light emitting layer being configured to emit light rays of said different dominant emission wavelengths through a light emission surface of said organic light emitting layer; and a diffractive optical element placed over said light emission surface of said organic light emitting layer, wherein; said diffractive optical element is designed to have different grating patterns such that the light rays are diffracted by said grating patterns in such a manner to travel in a predetermined direction; and said different grating patterns comprise diffraction angles different from each other in relation to an incident light ray of a same wavelength. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A light emitting device comprising:
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an organic electroluminescence element including an organic light emitting layer including plural light emitting layers having different dominant emission wavelengths, which are stacked, said organic light emitting layer being configured to emit light rays of said different dominant emission wavelengths through a light emission surface of said organic light emitting layer; and a diffractive optical element placed over said light emission surface of said organic light emitting layer, wherein said diffractive optical element is designed to have different grating patterns diffracting the light rays for reducing color unevenness; and said different grating patterns comprise diffraction angles different from each other in relation to an incident light ray of a same wavelength. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A light emitting device comprising:
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an organic electroluminescence element including an organic light emitting layer including plural light emitting layers having different dominant emission wavelengths, which are stacked, said organic light emitting layer being configured to emit light rays of said different dominant emission wavelengths through a light emission surface of said organic light emitting layer; and a diffractive optical element placed over said light emission surface of said organic light emitting layer, wherein said diffractive optical element is designed to have different grating patterns diffracting the light rays for reducing wavelength dependency of the light rays; and said different grating patterns comprise diffraction angles different from each other in relation to an incident light ray of a same wavelength. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A light emitting device comprising:
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an organic electroluminescence element including an organic light emitting layer including plural light emitting layers having different dominant emission wavelengths, which are stacked, said organic light emitting layer being configured to emit light rays of said different dominant emission wavelengths through a light emission surface of said organic light emitting layer; and a diffractive optical element placed over said light emission surface of said organic light emitting layer, wherein said diffractive optical element is designed to have different grating patterns diffracting the light rays for making spatial phase distribution of each of the light rays uniform; and said different grating patterns comprise diffraction angles different from each other in relation to an incident light ray of a same wavelength. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification