Light emitting diodes for high AC voltage operation and general lighting
First Claim
1. A single-chip integrated LED device for use with an AC power source comprising:
- a first plurality of series connected LEDs having a forward biased direction of current flow, a reverse biased direction of no current flow opposite said forward biased direction of current flow, and presenting positive and negative terminals,a second plurality of series connected LEDs having a forward biased direction of current flow, a reverse biased direction of no current flow opposite said forward biased direction of current flow, and presenting positive and negative terminals,said positive terminal of said first plurality of LEDs connected to said negative terminal of said second plurality of LEDs,said negative terminal of said first plurality of LEDs connected to said positive terminal of said second plurality of LEDs,said terminals of said first and second plurality of LEDs adapted to be connected across said AC power source, andwherein said first plurality of series connected LEDs and said second plurality of series connected LEDs are flip-chip bonded to a submount,whereby a current from said AC power source energizes said first plurality of LEDs in the forward biased direction during a first half cycle of the AC power source and said current from said AC power source energizes said second plurality of LEDs in the forward biased direction during a second half cycle of the AC power source.
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Accused Products
Abstract
A single-chip integrated LED particularly adapted for direct use with a high voltage AC power comprises a plurality of series-connected LEDs arranged in two arrays and flip chip bonded to a transparent substrate. The opposite polarities of the arrays are connected together and then connected to the AC power source. During the positive half of the AC cycle, one array of LEDs is forward biased and energized, while the other array is reverse biased. During the negative half of the AC cycle, the other array of LEDs is forward biased and thus energized, while the first array is reverse biased and thus not energized. The arrays are alternately energized and de-energized at the frequency of the AC power source, and thus the single-chip integrated LED always appears to be energized.
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Citations
71 Claims
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1. A single-chip integrated LED device for use with an AC power source comprising:
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a first plurality of series connected LEDs having a forward biased direction of current flow, a reverse biased direction of no current flow opposite said forward biased direction of current flow, and presenting positive and negative terminals, a second plurality of series connected LEDs having a forward biased direction of current flow, a reverse biased direction of no current flow opposite said forward biased direction of current flow, and presenting positive and negative terminals, said positive terminal of said first plurality of LEDs connected to said negative terminal of said second plurality of LEDs, said negative terminal of said first plurality of LEDs connected to said positive terminal of said second plurality of LEDs, said terminals of said first and second plurality of LEDs adapted to be connected across said AC power source, and wherein said first plurality of series connected LEDs and said second plurality of series connected LEDs are flip-chip bonded to a submount, whereby a current from said AC power source energizes said first plurality of LEDs in the forward biased direction during a first half cycle of the AC power source and said current from said AC power source energizes said second plurality of LEDs in the forward biased direction during a second half cycle of the AC power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A light source comprising:
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a single-chip integrated LED device having a first plurality of series connected LEDs having a forward biased direction of current flow, and a second plurality of series connected LEDs having a forward biased direction of current flow, said first and second pluralities of LEDs connected together such that said respective forward biased directions of current flow are opposing, structure for connecting said first and second pluralities of LEDs across an AC power source, and wherein said first plurality of series connected LEDs and said second plurality of series connected LEDs are flip-chip bonded to a submount, whereby said first and second pluralities of LEDs are alternatively energized by said AC power source. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A light source comprising:
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a single-chip integrated LED device having an array of series-connected LEDs having a forward biased direction of current flow and presenting positive and negative terminals, said terminals of said single-chip integrated LED device adapted to be connected across an AC power source, and wherein said array of series-connected LEDs are flip-chip bonded to a submount, whereby a current from said AC power source energizes said array of series-connected LEDs in said forward biased direction during a first half cycle of the AC power source cycle. - View Dependent Claims (30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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31. The light source as set forth in 29 wherein said AC power source is 110 volts.
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44. A light source comprising:
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a single chip integrated LED device having a first plurality of series connected LEDs for flow of current therethrough in a first direction and a second plurality of series connected LEDs for flow of current therethrough in a second direction, wherein said first and second pluralities of series connected LEDs are flip-chip bonded to a submount, and structure for connecting said first and second pluralities of LEDs across an AC power source for flow of current therethrough alternately in said first and second directions in response to an applied current. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
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58. A light source comprising:
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a single-chip integrated device having a plurality of pairs of LEDs, each of said pairs of LEDs a first LED having a first forward biased direction of current flow and a second LED having a second forward biased direction of current flow, said first LED connected to said second LED opposite said second forward biased direction of current flow, said plurality of pairs of LEDs connected in series, structure adapted to connect said plurality of pairs of LEDs across an AC power source, and wherein said plurality of pairs of LEDs are flip-chip bonded to a submount, whereby a current from said AC power source energizes said plurality of first LEDs in said first forward biased direction during a first half cycle of the AC power source cycle and said plurality of second LEDs in said second forward biased direction during a second half cycle of the AC power source cycle. - View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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Specification