White light emitting diode (LED) lighting device driven by pulse current

• US 8,878,199 B2
• Filed: 12/16/2013
• Issued: 11/04/2014
• Est. Priority Date: 03/12/2010
• Status: Active Grant

• Current Assignee: Sichuan Sunfor Light Co. Ltd.
• Original Assignee: Sichuan Sunfor Light Co. Ltd.
• Inventors: Zhang, Ming, Zhao, Kun, Li, Dong-ming
• Primary Examiner(s): Pham, Hoai V
• Application Number:
  US14/107,294
• Publication Number:
  US 20140131746A1
• Time in Patent Office: 323 Days
• Field of Search: 257/40, 257/79, 257/80, 257/81, 257/89, 257/98, 257/E31.127, 257/E33.001
• US Class Current: 257/79
• CPC Class Codes: C09K 11/586 with alkaline earth metals
• CPC Class Codes: C09K 11/7421 with alkaline earth metals
• CPC Class Codes: C09K 11/7703 with alkaline earth metals
• CPC Class Codes: C09K 11/7761 with alkaline earth metals
• CPC Class Codes: C09K 11/7774 Aluminates
• CPC Class Codes: C09K 11/77744 Aluminosilicates
• CPC Class Codes: C09K 11/7792 Aluminates
• CPC Class Codes: C09K 11/77922 Silicates
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• CPC Class Codes: H05B 44/00 Circuit arrangements for operating electroluminescent light sources for operating light emitting diodes H05B45/00
• CPC Class Codes: H05B 45/32 Pulse-control circuits
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %: 30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.

Claims

1. A white LED lighting device driven by a pulse current, characterized in that

the white LED lighting device comprises blue, violet or ultraviolet LED chips and luminescence material, the luminescence material being a combination of blue afterglow luminescence material A and yellow luminescence material B, the yellow luminescence material B being able to emit light under excitation of the blue, violet or ultraviolet LED chips and/or excitation of the blue afterglow luminescence material A,

the white LED lighting device driving the LED chips with a pulse current having a frequency of not less than 50 Hz.

2. The white LED lighting device of claim 1, wherein a weight ratio (A:

B) between the blue afterglow luminescence material A and the yellow luminescence material B is 10˜

70wt %;

30˜

90wt %, wherein the blue afterglow luminescence material A has a peak light-emitting wavelength of 440˜

490 nm, and wherein the yellow luminescence material B has a peak light-emitting wavelength of 520˜

580 nm.

3. The white LED lighting device of claim 1, comprising:

a blue LED chip;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P as the yellow luminescence material B.

4. The white LED lighting device of claim 1, comprising:

a blue LED chip;

Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Y₃Al₅O₁₂;

Ce as the yellow luminescence material B.

5. The white LED lighting device of claim 1, comprising:

a blue LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺and Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Tb₃Al₅O₁₂;

Ce as the yellow luminescence material B.

6. The white LED lighting device of claim 1, comprising:

a blue LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺, Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺and CaS;

Bi³⁺, Na⁺as the blue afterglow luminescence material A; and

a mixture of Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P;

Sr₃SiO₅;

Eu²⁺,Dy³⁺and Ca₂MgSi₂O₇;

Eu²⁺,Dy³⁺as the yellow luminescence material B.

7. The white LED lighting device of claim 1, comprising:

a blue LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺;

CaSrS;

Bi³⁺;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺;

CaS;

Bi³⁺, Na⁺and CaS;

Cu⁺, Na⁺as the blue afterglow luminescence material A; and

a mixture of Y₂O₂S;

Mg, Ti and Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P as the yellow luminescence material B.

8. The white LED lighting device of claim 1, comprising:

a blue LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺;

CaSrS;

Bi³⁺and Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

a mixture of Sr₃SiO₅ Eu²⁺,Dy³⁺;

Ca₂MgSi₂O₇;

Eu²⁺,Dy³⁺and Y₃Al₅O₁₂;

Ce as the yellow luminescence material B.

9. The white LED lighting device of claim 1, comprising:

a blue LED chip;

CaS;

Bi³⁺,Na⁺as the blue afterglow luminescence material A; and

a mixture of Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P;

CaS;

Sm^3+;

Y₂O₂S;

Mg,Ti;

Sr₃SiO₅;

Eu²⁺,Dy³⁺, Ca₂MgSi₂O₇;

Eu²⁺,Dy³⁺as the yellow luminescence material B.

10. The white LED lighting device of claim 1, comprising:

a violet LED chip;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P as the yellow luminescence material B.

11. The white LED lighting device of claim 1, comprising:

a violet LED chip;

Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Y₃Al₅O₁₂;

Ce as the yellow luminescence material B.

12. The white LED lighting device of claim 1, comprising:

a violet LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺and Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Tb₃Al₅O₁₂;

Ce as the yellow luminescence material B.

13. The white LED lighting device of claim 1, comprising:

a violet LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺and CaS;

Bi³⁺, Na⁺as the blue afterglow luminescence material A; and

a mixture of Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P;

Sr₃SiO₅;

Eu²⁺,Dy³⁺and Ca₂MgSi₂O₇;

Eu²⁺,Dy³⁺as the yellow luminescence material B.

14. The white LED lighting device of claim 1, comprising:

a violet LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺;

CaSrS;

Bi³⁺;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺;

CaS;

Bi³⁺, Na⁺and CaS;

Cu⁺, Na⁺as the blue afterglow luminescence material A; and

a mixture of Y₂O₂S;

Mg, Ti and Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P as the yellow luminescence material B.

15. The white LED lighting device of claim 1, comprising:

an ultraviolet LED chip;

Sr₂MgSi₂O₇;

Eu²⁺,Dy³as the blue afterglow luminescence material A; and

Y₃Al₅O₁₂;

Ce as the yellow luminescence material B.

16. The white LED lighting device of claim 1, comprising:

an ultraviolet LED chip;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Tb₃Al₅O₁₂;

Ce as the yellow luminescence material B.

17. The white LED lighting device of claim 1, comprising:

an ultraviolet LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺and Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P as the yellow luminescence material B.

18. The white LED lighting device of claim 1, comprising:

an ultraviolet LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺and CaS;

Bi³⁺, Na⁺ as the blue afterglow luminescence material A; and

a mixture of Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P;

Sr₃SiO₅;

Eu²⁺,Dy³⁺and Ca₂MgSi₂O₇;

Eu²,Dy³⁺as the yellow luminescence material B.

19. The white LED lighting device of claim 1, comprising:

an ultraviolet LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺;

CaSrS;

Bi³⁺;

Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺;

CaS;

Bi³⁺, Na⁺and CaS;

Cu³, Na⁺as the blue afterglow luminescence material A; and

a mixture of Y₂O₂S;

Mg, Ti and Y₂O₃.Al₂O₃.SiO₂;

Ce.B.Na.P as the yellow luminescence material B.

20. The white LED lighting device of claim 1, comprising:

An ultraviolet LED chip;

a mixture of Sr₂MgSi₂O₇;

Eu²⁺,Dy³⁺;

CaSrS;

Bi³⁺and Sr₄Al₁₄O₂₅;

Eu²⁺,Dy³⁺as the blue afterglow luminescence material A; and

a mixture of Sr₃SiO₅ Eu²⁺,Dy³⁺;

Ca₂MgSi₂O₇;

Eu²⁺,Dy³⁺and Y₃Al₅O₁₂;

Ce as the yellow luminescence material B.