White LED assembly with LED string and intermediate node substrate terminals
First Claim
1. A device comprising:
- a hexagonal substrate having a first terminal, a second terminal, a third terminal, and a fourth terminal;
a first light emitting diode (LED);
a second LED;
a third LED, wherein the first LED, the second LED and the third LED are coupled together as a string of series-connected LEDs such that a current flows from the first terminal, through the first LED, through the second terminal, through the second LED, through the third terminal, through the third LED and to the fourth terminal, wherein the second terminal is a part of an intermediate node along the string, and wherein the first LED, the second LED, and the third LED are fixed to the substrate in a triangular pattern; and
a single contiguous amount of phosphor that contacts the substrate and that covers the first LED, the second LED and the third LED, wherein the single contiguous amount of phosphor does not cover any of the first, second, third or fourth terminals.
1 Assignment
0 Petitions
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.
-
Citations
20 Claims
-
1. A device comprising:
-
a hexagonal substrate having a first terminal, a second terminal, a third terminal, and a fourth terminal; a first light emitting diode (LED); a second LED; a third LED, wherein the first LED, the second LED and the third LED are coupled together as a string of series-connected LEDs such that a current flows from the first terminal, through the first LED, through the second terminal, through the second LED, through the third terminal, through the third LED and to the fourth terminal, wherein the second terminal is a part of an intermediate node along the string, and wherein the first LED, the second LED, and the third LED are fixed to the substrate in a triangular pattern; and a single contiguous amount of phosphor that contacts the substrate and that covers the first LED, the second LED and the third LED, wherein the single contiguous amount of phosphor does not cover any of the first, second, third or fourth terminals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method comprising:
-
coupling a plurality of LED dice to a hexagonal substrate such that the LED dice form a string of series-connected LED dice, such that a first terminal is a part of a first node of the string, such that a second terminal is a part of a second node of the string, such that a third terminal is a part of a third node of the string, and such that a fourth terminal is a part of a fourth node of the string, wherein three of the LED dice are coupled to the substrate in a triangular pattern; 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 or fourth terminals, wherein the string of series-connected LED dice, the substrate, and the single contiguous amount of phosphor together comprise an LED assembly. - View Dependent Claims (12, 13, 14, 15)
-
-
16. A device comprising:
-
a hexagonal substrate having a first terminal, a second terminal, and a third terminal; a first LED die; a second LED die; a single contiguous amount of phosphor that covers the first LED die, that covers the second LED die, and that contacts the substrate, wherein the single contiguous amount of phosphor does not cover any of the first, second and third terminals, wherein the single contiguous amount of phosphor is contained within a retaining ring, and wherein the first terminal, the second terminal and the third terminal are disposed outside the retaining ring; first means for coupling the first terminal to a first electrode of the first LED die; second means for coupling the second terminal to a second electrode of the first LED die, and for coupling the second terminal to a first electrode of the second LED die; and third means for coupling the third terminal to a second electrode of the second LED die. - View Dependent Claims (17, 18, 19, 20)
-
Specification