LIGHT-EMITTING DEVICE, PRINT HEAD AND IMAGE FORMING APPARATUS
First Claim
1. A light-emitting device comprising:
- a substrate;
a reflection layer that is provided on the substrate, and that reflects light in a wavelength band set in advance; and
a light-emitting layer that is provided on the reflection layer, and that includes a light-emitting region emitting light having wavelengths overlapping in the wavelength band and a surface having unevenness at a plurality of distances from the reflection layer, the surface being provided on a side opposite to the reflection layer across the light-emitting region, the plurality of distances being set so that wavelengths forming standing waves depending on each of the distances in the wavelength band are interposed each other.
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Accused Products
Abstract
A light-emitting device includes: a substrate; a reflection layer that is provided on the substrate, and that reflects light in a wavelength band set in advance; and a light-emitting layer that is provided on the reflection layer, and that includes a light-emitting region emitting light having wavelengths overlapping in the wavelength band and a surface having unevenness at plural distances from the reflection layer. The surface is provided on a side opposite to the reflection layer across the light-emitting region. The plural distances are set so that wavelengths forming standing waves depending on each of the distances in the wavelength band are interposed each other.
15 Citations
11 Claims
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1. A light-emitting device comprising:
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a substrate; a reflection layer that is provided on the substrate, and that reflects light in a wavelength band set in advance; and a light-emitting layer that is provided on the reflection layer, and that includes a light-emitting region emitting light having wavelengths overlapping in the wavelength band and a surface having unevenness at a plurality of distances from the reflection layer, the surface being provided on a side opposite to the reflection layer across the light-emitting region, the plurality of distances being set so that wavelengths forming standing waves depending on each of the distances in the wavelength band are interposed each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A print head comprising:
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an exposure unit that includes a light-emitting device and that exposes an image carrier; and an optical unit that focuses light emitted by the exposure unit onto the image carrier, the light-emitting device including; a substrate; a reflection layer that is provided on the substrate, and that reflects light in a wavelength band set in advance; and a light-emitting layer that is provided on the reflection layer, and that includes a light-emitting region emitting light having wavelengths overlapping in the wavelength band and a surface having unevenness at a plurality of distances from the reflection layer, the surface being provided on a side opposite to the reflection layer across the light-emitting region, the plurality of distances being set so that wavelengths forming standing waves depending on each of the distances in the wavelength band are interposed each other.
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11. An image forming apparatus comprising:
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a charging unit that charges an image carrier; an exposure unit that includes a light-emitting device and that exposes the image carrier; an optical unit that focuses light emitted by the exposure unit onto the image carrier; a developing unit that develops an electrostatic latent image formed on the image carrier; and a transfer unit that transfers an image developed on the image carrier onto a transferred body, the light-emitting device including; a substrate; a reflection layer that is provided on the substrate, and that reflects light in a wavelength band set in advance; and a light-emitting layer that is provided on the reflection layer, and that includes a light-emitting region emitting light having wavelengths overlapping in the wavelength band and a surface having unevenness at a plurality of distances from the reflection layer, the surface being provided on a side opposite to the reflection layer across the light-emitting region, the plurality of distances being set so that wavelengths forming standing waves depending on each of the distances in the wavelength band are interposed each other.
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Specification