Light-emitting-diode-based light bulb
First Claim
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1. A light-emitting-diode-based (LED-based) light bulb, comprising:
- a bulb;
a housing, wherein the bulb is disposed on the housing;
a base, wherein the housing is disposed on the base, and wherein the base is configured to make electrical contact of a power source; and
an LED assembly, wherein the LED assembly includes an upper substrate for supporting one or more upper LED emitters and a lower substrate for supporting a plurality of lower LED emitters, wherein the lower substrate is at the same level as, or higher than, an interface between the bulb and the housing, and wherein the LED assembly also includes a reflective surface extending between an outer edge of the upper substrate and an inner edge of the lower substrate, wherein the reflective surface is configured to direct at least a portion of light generated by the lower LED emitters toward a backside of the LED-based light bulb, and wherein the reflective surface has a surface profile between the upper substrate and the lower substrate, the surface profile comprising a saw-patterned, or roughened profile, and wherein the inner edge of the lower substrate has a first radius and the outer edge of the upper substrate has a second radius, and wherein a ratio of the first radius to the second radius is in a range from about 0.4 to about 0.95.
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Abstract
The embodiments of a light-emitting-diode-based (LED-based) light bulb and an LED assembly described provide mechanisms of reflecting generated by LED emitters toward the back of the LED-based light bulb. An upper substrate and a lower substrate are used to support upper and lower LED emitters. A slanted and reflective surface between the upper substrate and the lower substrate reflects light generated by the lower LED emitters toward the backside of the LED-based light bulb.
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Citations
19 Claims
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1. A light-emitting-diode-based (LED-based) light bulb, comprising:
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a bulb; a housing, wherein the bulb is disposed on the housing; a base, wherein the housing is disposed on the base, and wherein the base is configured to make electrical contact of a power source; and an LED assembly, wherein the LED assembly includes an upper substrate for supporting one or more upper LED emitters and a lower substrate for supporting a plurality of lower LED emitters, wherein the lower substrate is at the same level as, or higher than, an interface between the bulb and the housing, and wherein the LED assembly also includes a reflective surface extending between an outer edge of the upper substrate and an inner edge of the lower substrate, wherein the reflective surface is configured to direct at least a portion of light generated by the lower LED emitters toward a backside of the LED-based light bulb, and wherein the reflective surface has a surface profile between the upper substrate and the lower substrate, the surface profile comprising a saw-patterned, or roughened profile, and wherein the inner edge of the lower substrate has a first radius and the outer edge of the upper substrate has a second radius, and wherein a ratio of the first radius to the second radius is in a range from about 0.4 to about 0.95. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An LED assembly for an LED-based light bulb, comprising:
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an upper substrate for supporting one or more upper LED emitters, wherein the upper substrate has a first radius; a lower substrate for supporting a plurality of lower LED emitters, wherein the lower substrate has a second radius, and wherein a ratio of the second radius to the first radius is in a range from about 0.4 to about 0.95; and a reflective surface disposed between the upper substrate and the lower substrate, and wherein an outer edge of the upper substrate is connected to an inner edge of the lower substrate by the reflective surface, and wherein the reflective surface is slanted away from the LED-based light bulb, and wherein the reflective surface reflects light generated by the lower LED emitters toward the backside of the LED-based light bulb. - View Dependent Claims (15, 16, 17)
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18. An LED assembly for an LED-based light bulb, comprising:
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a lower substrate for supporting a plurality of lower LED emitters; an upper substrate for supporting one or more upper LED emitters, wherein a top surface of the upper substrate has a height above the top surface of the lower substrate, wherein the height is in a range from about 5 mm to about 30 mm; a reflective surface disposed between the upper substrate and the lower substrate, and wherein an outer edge of the upper substrate is connected to an inner edge of the lower substrate by the reflective surface, and wherein the reflective surface is slanted away from the LED-based light bulb, and wherein the reflective surface reflects light generated by the lower LED emitters toward the backside of the LED-based light bulb; and a bulb that covers the lower substrate and the upper substrate, wherein the bulb has a shape of a partial sphere having a radius, and wherein a ratio of the height of the upper substrate to the radius of the bulb is in a range from about 0.2 to about 0.5. - View Dependent Claims (19)
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Specification