Light-emitting device
AssigneeTamura Corporation
InventorsSueyoshi Daimon, Tsunehide Naruse, Yukiharu Suzuki
Life of this patent
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Abstract
A light-emitting device of a very simple configuration in which uniform LED light illumination can be obtained with a low light quantity loss, the device having a low production cost, improved emission characteristic and excellent cost efficiency and reliability. A transparent body is disposed in the vicinity of a LED, and a light-scattering layer that scatters the light of the LED is formed by coating on the light-illuminating surface of the transparent body through which the light of the LED passes. The light-scattering layer contains 2.5 parts by weight to 4 parts by weight of a filler and has a thickness of 5 μm to 20 μm.
Claims10
A light-emitting device that has a LED as a light source, comprising:
- a transparent body that is disposed in the vicinity of the LED or so as to incorporate the LED inside thereof;
- and
- a light-scattering layer that scatters light of the LED, which is formed by coating, within the surface of the transparent body, on a light-illuminating surface that illuminates the light from the LED to the outside, wherein the light-scattering layer has a thickness of 5 μm to 20 μm.
A light-emitting device that has a LED as a light source comprising:
- a transparent body that is disposed in the vicinity of the LED or so as to incorporate the LED inside thereof;
- and
- a light-scattering layer that scatters light of the LED, which is formed by coating, within the surface of the transparent body, on a light-illuminating surface that illuminates the light from the LED to the outside,
- wherein the light-scattering layer is configured by:
- a binder layer comprising an acrylic resin, a mixture of nitrocellulose and an alkyd resin, a polycarbonate, a polyurethane resin, a polyester resin, an epoxy resin, a silicone resin or a vinyl chloride resin;
- and
- a filler in a form of fine powder composed of an inorganic material containing at least one from silica, glass, alumina, and titanium oxide, or an organic material containing at least one from polypropylene, polyethylene, polymethyl methacrylate, polybutyl methacrylate, polystyrene, polyurethane, and a silicone resin, the filler being filled into the binder layer so as to be uniformly dispersed therein.
Dependencies are inferred from the claim text.