Light emitting diodes for high AC voltage operation and general lighting

• US 6,957,899 B2
• Filed: 10/24/2002
• Issued: 10/25/2005
• Est. Priority Date: 10/24/2002
• Status: Active Grant

• Current Assignee: Seoul Semiconductor Co., Ltd.
• Original Assignee: Hongxing Jiang, Jingyu Lin
• Inventors: Jiang, Hongxing, Lin, Jingyu, Jin, Sixuan
• Primary Examiner(s): Husar, Stephen F
• Application Number:
  US10/279,296
• Publication Number:
  US 20040080941A1
• Time in Patent Office: 1,097 Days
• Field of Search: 362/252, 362/545, 362/800, 313/500, 257/88, 257/93, 315/185.R, 315/193, 428/195.1
• US Class Current: 362/84
• CPC Class Codes: H01L 2224/18 High density interconnect [HDI] connectors; Manufacturing methods related thereto
• CPC Class Codes: H01L 2224/24137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/73267 Layer and HDI connectors
• CPC Class Codes: H01L 24/18 High density interconnect [HDI] connectors; Manufacturing methods related thereto interconnection structure between a plurality of semiconductor chips H01L23/5389
• CPC Class Codes: H01L 24/24 of an individual high density interconnect connector
• CPC Class Codes: H01L 24/82 by forming build-up interconnects at chip-level, e.g. for high density interconnects [HDI] interconnection structure between a plurality of semiconductor chips H01L23/5389
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2924/01015 Phosphorus [P]
• CPC Class Codes: H01L 2924/01023 Vanadium [V]
• CPC Class Codes: H01L 2924/01029 Copper [Cu]
• CPC Class Codes: H01L 2924/01033 Arsenic [As]
• CPC Class Codes: H01L 2924/01049 Indium [In]
• CPC Class Codes: H01L 2924/01077 Iridium [Ir]
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 2924/14 Integrated circuits
• CPC Class Codes: H05B 45/42 Antiparallel configurations
• CPC Class Codes: Y10S 362/80 Light emitting diode

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. 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.

Claims

1. A single-chip integrated LED for use with a high voltage 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, and

said terminals of said first and second plurality of LEDs connected to the opposite polarities of said AC power source,

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.

2. The single-chip integrated LED as claimed in claim 1 wherein said AC power source is 110 volts.

3. The single-chip integrated LED as claimed in claim 1 wherein said AC power source is 220 volts.

4. The single-chip integrated LED as claimed in claim 1 wherein said chip is fabricated on an insulating substrate material.

5. The single-chip integrated LED as claimed in claim 1 wherein said plurality of LEDs include semiconductor p-n junctions.

6. The single-chip integrated LED as claimed in claim 1 wherein said plurality of LEDs include semiconductor heterojunctions.

7. The single-chip integrated LED as claimed in claim 1 wherein said plurality of LEDs include semiconductor quantum wells.

8. The single-chip integrated LED as claimed in claim 1 wherein said plurality of LEDs include organic electro-luminescent materials.

9. The single-chip integrated LED as claimed in claim 1 wherein said plurality of LEDs include polymer electro-luminescent materials.

10. A single-chip integrated diode for use with a high voltage AC power source comprising:

a first plurality of diodes 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 diodes 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 first and second plurality of diodes connected together such that said respective forward biased directions of current flow are opposing, and

said first and second plurality of diodes connected to the opposing polarities of said AC power source,

whereby said first and second plurality of diodes are alternatively energized by said AC power source.

11. The single-chip integrated diode as claimed in claim 10 wherein said diode is a light emitting diode.

12. The single-chip integrated diode as claimed in claim 10 wherein said AC power source is 110 volts.

13. The single-chip integrated diode as claimed in claim 10 wherein said AC power source is 220 volts.

14. The single-chip integrated diode as claimed in claim 10 wherein said chip is fabricated on an insulating substrate material.

15. The single-chip integrated diode as claimed in claim 10 wherein said plurality of diodes include semiconductor p-n junctions.

16. The single-chip integrated diode as claimed in claim 10 wherein said plurality of diodes include semiconductor heterojunctions.

17. The single-chip integrated diode as claimed in claim 10 wherein said plurality of diodes include semiconductor quantum wells.

18. The single-chip integrated diode as claimed in claim 10 wherein said plurality of diodes include organic electro-luminescent materials.

19. The single-chip integrated diode as claimed in claim 10 wherein said plurality of diodes include polymer electro-luminescent materials.

20. The single-chip integrated diode as claimed in claim 10 wherein said plurality of diodes include IR or UV diodes.

21. A single-chip integrated diode for use with a high voltage AC power source comprising:

an array of series-connected diodes 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, and

said terminals of said array connected to opposite polarities of said AC power source,

whereby a current from said AC power source energizes said array in the forward biased direction of said array during a first half cycle of the AC power source cycle.

22. The single-chip integrated diode as claimed in claim 21 further comprising:

a second array of series-connected diodes 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 second array connected to said negative terminal of said array, and

said negative terminal of said second array connected to said positive terminal of said array,

whereby said current from said AC power source energizes said second array in the forward biased direction of said second array during a second half cycle of the AC power source cycle.

23. The single-chip integrated diode as claimed in claim 21 wherein said diode is a light emitting diode.

24. The single-chip integrated diode as claimed in claim 21 wherein said AC power source is 110 volts.

25. The single-chip integrated diode as claimed in claim 21 wherein said AC power source is 220 volts.

26. The single-chip integrated diode as claimed in claim 21 wherein said chip is fabricated on an insulating substrate material.

27. The single-chip integrated diode as claimed in claim 21 wherein said plurality of diodes include semiconductor p-n junctions.

28. The single-chip integrated diode as claimed in claim 21 wherein said plurality of diodes include semiconductor heterojunctions.

29. The single-chip integrated diode as claimed in claim 21 wherein said plurality of diodes include semiconductor quantum wells.

30. The single-chip integrated diode as claimed in claim 21 wherein said plurality of diodes include organic electro-luminescent materials.

31. The single-chip integrated diode as claimed in claim 21 wherein said plurality of diodes include polymer electro-luminescent materials.

32. The single-chip integrated diode as claimed in claim 21 wherein said plurality of diodes include IR or UV diodes.