LED BULB WITH A GAS MEDIUM HAVING A UNIFORM LIGHT-DISTRIBUTION PROFILE
First Claim
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1. A light-emitting diode (LED) bulb comprising:
- a base;
a shell connected to the base; and
a plurality of LEDs disposed within the shell, wherein;
a first set of LEDs of the plurality of LEDs is positioned a first distance with respect to the center of a convex portion of the shell, and at a first angle with respect to a centerline of the LED bulb,a second set of LEDs of the plurality of LEDs is positioned a second distance with respect to the center of the convex portion of the shell, and at a second angle with respect to the centerline of the LED bulb, andthe first and second sets of LEDs are configured to provide the LED bulb with a predicted light-distribution profile that varies less than 20 percent in light intensity over 0 degrees to 135 degrees as measured from an axis from the center of the shell through an apex of the shell.
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Abstract
An LED bulb includes a base, a shell, and a plurality of LEDs. The shell is connected to the base and the plurality of LEDs is disposed within the shell. The LEDs are configured to provide the LED bulb with a uniform light-distribution profile.
7 Citations
20 Claims
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1. A light-emitting diode (LED) bulb comprising:
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a base; a shell connected to the base; and a plurality of LEDs disposed within the shell, wherein; a first set of LEDs of the plurality of LEDs is positioned a first distance with respect to the center of a convex portion of the shell, and at a first angle with respect to a centerline of the LED bulb, a second set of LEDs of the plurality of LEDs is positioned a second distance with respect to the center of the convex portion of the shell, and at a second angle with respect to the centerline of the LED bulb, and the first and second sets of LEDs are configured to provide the LED bulb with a predicted light-distribution profile that varies less than 20 percent in light intensity over 0 degrees to 135 degrees as measured from an axis from the center of the shell through an apex of the shell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A light-emitting diode (LED) bulb comprising:
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a base; a shell connected to the base; and a plurality of LEDs disposed within the shell; a gas medium disposed between the plurality of LEDs and the shell, wherein; a first set of LEDs of the plurality of LEDs is positioned a first distance with respect to the center of a convex portion of the shell, and at a first angle with respect to a centerline of the LED bulb, a second set of LEDs of the plurality of LEDs is positioned a second distance with respect to the center of the convex portion of the shell, and at a second angle with respect to the centerline of the LED bulb, and the first and second sets of LEDs are configured to provide the LED bulb with a predicted light-distribution profile that varies less than 20 percent in light intensity over 0 degrees to 135 degrees as measured from an axis from the center of the shell through an apex of the shell.
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19. A method of making a light-emitting diode (LED) bulb, the method comprising:
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obtaining a base; connecting a shell to the base; and placing a plurality of LEDs within the shell, wherein; a first set of LEDs of the plurality of LEDs is positioned a first distance with respect to the center of a convex portion of the shell, and at a first angle with respect to a centerline of the LED bulb, a second set of LEDs of the plurality of LEDs is positioned a second distance with respect to the center of the convex portion of the shell, and at a second angle with respect to the centerline of the LED bulb, and the first and second sets of LEDs and the shell are configured to provide the LED bulb with a predicted light-distribution profile that varies less than 20 percent in light intensity over 0 degrees to 135 degrees as measured from an axis from the center of the shell through an apex of the shell.
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20. A method of making a light-emitting diode (LED) bulb having a light-distribution profile that satisfies uniformity criteria, the method comprising:
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obtaining a base; obtaining a shell having an index of refraction; calculating a first angle and a first distance for a first set of LEDs of a plurality of LEDs based the index of refraction of the shell, calculating a second angle and a second distance for a second set of LEDs of the plurality of LEDs based the index of refraction of the shell, wherein the first angle, the first distance, the second angle, and the second distance result in a predicted light-distribution profile that varies less than 20 percent in light intensity over 0 degrees to 135 degrees as measured from an axis from the center of the shell through an apex of the shell; positioning the first set of LEDs at the first angle and the first distance within the shell; positioning the second set of LEDs at the second angle and the second distance within the shell; and attaching the shell to the base.
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Specification