High efficiency leds and led lamps

Patent metadata

Field	Value
Publication number	US-2016010805-A1
Application number	US-201514860800-A
Country	US
Kind code	A1
Filing date	Sep 22, 2015
Priority date	Jun 27, 2009
Publication date	Jan 14, 2016
Grant date	—

Abstract

In various embodiments, lighting systems include an electrically insulating carrier having a plurality of conductive elements disposed thereon, a light-emitting array, and at least one power source. The light-emitting array is disposed over the carrier and includes a plurality of light-emitting strings, each light-emitting string comprising a plurality of electrically connected light-emitting diodes (LEDs). Each LED has at least two electrical contacts, and each electrical contact is electrically connected to a conductive element. The power source provides power to the light-emitting strings.

First claim

1 .- 22 . (canceled)

23 . A lighting system comprising:
an electrically insulating carrier having a plurality of conductive elements disposed thereon; disposed over the carrier, a light-emitting array comprising a plurality of light-emitting strings, each light-emitting string comprising a plurality of light-emitting diodes (LEDs), each LED having at least two electrical contacts, wherein each electrical contact is electrically connected to a conductive element by a conductive adhesive; and at least one power source for providing power to the light-emitting strings.

24 . The system of claim 23 , wherein the electrically insulating carrier comprises a polymeric material.

25 . The system of claim 23 , wherein at least one LED comprises a packaged LED.

26 . The system of claim 25 , wherein the packaged LED comprises a light-conversion material.

27 . The system of claim 26 , wherein the light-conversion material comprises a phosphor.

28 . The system of claim 23 , wherein at least one LED comprises a bare-die LED.

29 . The system of claim 28 , further comprising a light-conversion material disposed over at least a portion of the bare-die LED.

30 . The system of claim 29 , wherein the light-conversion material comprises a phosphor.

31 . The system of claim 23 , wherein the electrically insulating carrier is flexible.

32 . The system of claim 23 , further comprising, disposed on the electrically insulating carrier, circuitry for controlling current supplied to the LEDs.

33 . The system of claim 23 , further comprising, disposed on the electrically insulating carrier, a plurality of circuits each for controlling current supplied to one of the light-emitting strings.

34 . The system of claim 23 , wherein at least one of the LEDs comprises a light-conversion material disposed therein or thereon, at least one of (i) light emitted from the light-conversion material or (ii) a mixture of light emitted from the at least one of the LEDs and the light-conversion material being white light.

35 . The system of claim 23 , further comprising an array of optical elements each associated with at least one LED, the array of optical elements at least one of focusing or shaping light from the LEDs to a desired illumination pattern.

36 . The system of claim 23 , wherein at least one first light-emitting string emits light having a color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution different from a color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution of at least one second light-emitting string.

37 . The system of claim 36 , wherein at least one of the LEDs of the at least one first light-emitting string is associated with a first light conversion material having a first optical characteristic, and at least one of the LEDs of the at least one second light-emitting string is associated with a second light conversion material having a second optical characteristic different from the first optical characteristic.

38 . The system of claim 36 , wherein at least one of the LEDs of the at least one first light-emitting string is associated with an optical element of a first type, and at least one of the LEDs of the at least one second light-emitting string is associated with an optical element of a second type different from the first type.

39 . The system of claim 23 , wherein:
the light-emitting array comprises (i) a first group of one or more light-emitting strings, and (ii) a second group of one or more light-emitting strings different from the first group, activation of the first group and deactivation of the second group produces light having a first color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution, and activation of the second group and deactivation of the first group produces light having a second color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution different from the first color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution.

40 . The system of claim 23 , further comprising:
a second electrically insulating carrier having a plurality of conductive elements disposed thereon; and disposed over the second electrically insulating carrier, a light-emitting array comprising a plurality of light-emitting strings, each light-emitting string comprising a plurality of LEDs, wherein (i) the strings on the electrically insulating carrier produce light having a first color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution, and (ii) the strings on the second electrically insulating carrier produce light having a second color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution different from the first color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution.

41 . The system of claim 23 , further comprising:
a second electrically insulating carrier having a plurality of conductive elements disposed thereon; and disposed over the second electrically insulating carrier, a light-emitting array comprising a plurality of light-emitting strings, each light-emitting string comprising a plurality of LEDs, wherein (i) the strings on the electrically insulating carrier produce light having a first color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution, and (ii) the strings on the second electrically insulating carrier produce light having a second color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution substantially the same as the first color, color temperature, intensity, efficiency, color rendering index, or spectral light distribution.

42 . A lighting system comprising:
an electrically insulating polymeric carrier having a plurality of conductive elements disposed thereon; disposed over the carrier, a light-emitting array comprising a plurality of light-emitting strings, each light-emitting string comprising a plurality of light-emitting diodes (LEDs), each LED having at least two electrical contacts, wherein each electrical contact is electrically connected to a conductive element by a conductive adhesive; disposed on the carrier, circuitry for controlling current supplied to the LEDs; and at least one power source for providing power to the light-emitting strings, wherein (i) the conductive elements comprise copper and (ii) the LEDs emit white light.

Assignees

• Tischler Michael A
• Odnoblyudov Vladimir
• Keogh David

Inventors

• Tischler Michael A
• Odnoblyudov Vladimir
• Keogh David

Classifications

• F21Y2105/10

  comprising a two-dimensional [2D] array of point-like light-generating elements · CPC title

• F21K9/64

  using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• H10W90/00

  Package configurations · CPC title

• H10W90/754

  between a chip and a stacked insulating package substrate, interposer or RDL · CPC title