LED LIGHT BULB WITH A PHOSPHOR STRUCTURE IN AN INDEX-MATCHED LIQUID
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United States of America Patent
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app pub date -
Mar 15, 2013
filing date -
Mar 15, 2013
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Abstract
A liquid-filled LED bulb including a base and a shell connected to the base forming an enclosed volume. The liquid-filled LED bulb also includes a plurality of LEDs attached to the base and disposed within the enclosed volume. A thermally conductive liquid is held within the enclosed volume and has a first index of refraction. The LED bulb also includes a ring structure disposed within the enclosed volume and immersed in the thermally conductive liquid. The ring structure has a second index of refraction that matches the first index of refraction. A phosphor material is disposed on, or dispersed within, the ring structure. A first amount of the thermally conductive liquid is disposed between the LEDs and the ring structure and a second amount of the thermally conductive liquid is disposed between the ring structure and the shell.
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