White LED assembly with LED string and intermediate node substrate terminals
First Claim
1. A Light Emitting Diode (LED) assembly comprising:
- a substrate having a first substrate terminal, a second substrate terminal, a third substrate terminal, and a fourth substrate terminal;
a first blue LED die or plurality of series-connected blue LED dice having a first end coupled to the first substrate terminal, and having a second end coupled to the second substrate terminal;
a second blue LED die or plurality of series-connected blue LED dice having a first end coupled to the second substrate terminal, and having a second end coupled to the third substrate terminal;
a third blue LED die or plurality of series-connected blue LED dice having a first end coupled to the third substrate terminal, and having a second end coupled to the fourth substrate terminal; and
a single contiguous amount of phosphor that covers the first blue LED or plurality of series-connected blue LED dice, that covers the second blue LED or plurality of series-connected blue LED dice, that covers the third blue LED or plurality of series-connected blue LED dice, and that contacts the substrate, wherein the single contiguous amount of phosphor does not cover any of the first, second, third and fourth substrate terminals.
3 Assignments
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Accused Products
Abstract
A white LED assembly includes a string of series-connected blue LED dice mounted on a substrate. The substrate has a plurality of substrate terminals. A first of the substrate terminals is coupled to be a part of first end node of the string. A second of the substrate terminals is coupled to be a part of an intermediate node of the string. A third of the substrate terminals is coupled to be a part of a second end node of the string. Other substrate terminals may be provided and coupled to be parts of corresponding other intermediate nodes of the string. A single contiguous amount of phosphor covers all the LED dice, but does not cover any of the substrate terminals. In one example, the amount of phosphor contacts the substrate and has a circular periphery. All the LEDs are mounted to the substrate within the circular periphery.
41 Citations
20 Claims
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1. A Light Emitting Diode (LED) assembly comprising:
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a substrate having a first substrate terminal, a second substrate terminal, a third substrate terminal, and a fourth substrate terminal; a first blue LED die or plurality of series-connected blue LED dice having a first end coupled to the first substrate terminal, and having a second end coupled to the second substrate terminal; a second blue LED die or plurality of series-connected blue LED dice having a first end coupled to the second substrate terminal, and having a second end coupled to the third substrate terminal; a third blue LED die or plurality of series-connected blue LED dice having a first end coupled to the third substrate terminal, and having a second end coupled to the fourth substrate terminal; and a single contiguous amount of phosphor that covers the first blue LED or plurality of series-connected blue LED dice, that covers the second blue LED or plurality of series-connected blue LED dice, that covers the third blue LED or plurality of series-connected blue LED dice, and that contacts the substrate, wherein the single contiguous amount of phosphor does not cover any of the first, second, third and fourth substrate terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of manufacturing a white (Light Emitting Diode) LED assembly, the method comprising:
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coupling a plurality of blue LED dice to a substrate such that the LED dice form a string of series-connected blue LED dice, such that a first substrate terminal is a part of a first node of the string, such that a second substrate terminal is a part of a second node of the string, such that a third substrate terminal is a part of a third node of the string, such that a fourth substrate terminal is a part of a fourth node of the string; and forming a single contiguous amount of phosphor such that the phosphor contacts the substrate and covers the string of LEDs but such that the phosphor does not cover any of the first, second, third and fourth substrate terminals, wherein the string of series-connected blue LED dice, the substrate, and single contiguous amount of phosphor together comprise the white LED assembly. - View Dependent Claims (12, 13, 14, 15)
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16. A Light Emitting Diode (LED) assembly comprising:
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a substrate having a first substrate terminal, a second substrate terminal, and a third substrate terminal; a first blue LED die or plurality of series-connected blue LED dice; a second blue LED die or plurality of series-connected blue LED dice; a single contiguous amount of phosphor that covers the first blue LED or plurality of series-connected blue LED dice, that covers the second blue LED or plurality of series-connected blue LED dice, and that contacts the substrate, wherein the single contiguous amount of phosphor does not cover any of the first, second and third substrate terminals; first means for coupling the first substrate terminal to a first electrode of first blue LED die or plurality of series-connected blue LED dice; second means for coupling the second substrate terminal to a second electrode of the first blue LED die or plurality of series-connected blue LED dice, and for coupling the second terminal to a first electrode of the second blue LED die or plurality of series-connected blue LED dice; and third means for coupling the third substrate terminal to a second electrode of the second blue LED die or plurality of series-connected blue LED dice. - View Dependent Claims (17, 18, 19, 20)
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Specification