LIGHT EMITTING DIODE DEVICE WITH MULTIPLE LIGHT EMITTING DIODES

• US 20130168709A1
• Filed: 08/08/2012
• Published: 07/04/2013
• Est. Priority Date: 12/30/2011
• Status: Abandoned Application

• Current Assignee: Advanced Optoelectronic Technology, Inc.
• Original Assignee: Advanced Optoelectronic Technology, Inc.
• Inventors: LIN, HSIN-CHIANG
• Application Number:
  US13/570,223
• Publication Number:
  US 20130168709A1
• Time in Patent Office: Days
• US Class Current: 257/89
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

A light emitting diode (LED) device includes a substrate having a top surface, a first LED and a second LED arranged on the top surface of the substrate, and a lens arranged over the light emitting surface of the first and second LEDs. The first and second LEDs each have a light emitting surface away from the top surface of the substrate. A first wavelength of light emitted from the first LED is shorter than a second wavelength of light emitted from the second LED. The lens includes a convergent part located right above the second LED and a divergent part located right above the first LED.

Claims

1. An LED (light emitting diode) device, comprising:

a substrate having a top surface;

a first LED and a second LED arranged on the top surface of the substrate, the first and second LEDs each having a light emitting surface away from the top surface of the substrate, a first wavelength of light emitted from the first LED being shorter than a second wavelength of light emitted from the second LED; and

a lens arranged over the light emitting surfaces of the first and second LEDs, the lens comprising a convergent part just located above the second LED and a divergent part just located above the first LED.

2. The LED device of claim 1, wherein the first wavelength of light emitted from the first LED is in a range from 450 to 550 nm, and the second wavelength of light emitted from the second LED is greater than 570 nm;

3. The LED device of claim 1, wherein the lens comprises a light input surface facing the top surface of the substrate and a light output surface opposite to the light input surface, the light output surface comprising the convergent part and the divergent part.

4. The LED device of claim 3, wherein the light input surface is a planar surface.

5. The LED device of claim 1, wherein the convergent part is a convex surface towards outside of the LED device, and the divergent part is a concave surface towards the first LED.

6. The LED device of claim 1, wherein the first LED is selected from a group consisting of blue LED, green LED, and blue-green LED.

7. The LED device of claim 1, wherein the second LED is a red LED.

8. The LED device of claim 1, wherein a phosphor covers the light emitting surface of the first LED.

9. The LED device of claim 1, further comprising a reflecting cup arranged on the top surface of the substrate and surrounding the first LED and the second LED, the lens being received in the reflecting cup.

10. An LED device, comprising:

a substrate having a top surface;

a plurality of first LEDs and a second LED arranged on the top surface of the substrate, the first and second LEDs each having a light emitting surface away from the top surface of the substrate, light emitted from the first LED having a first wavelength which is in a range from 450 to 550 nm, and light emitted from the second LED having a second wavelength which is greater than 570 nm;

a lens arranged over the light emitting surfaces of the first LEDs and the second LED, the lens comprising a convergent part located right above the second LED and a plurality of divergent parts each located right above a corresponding first LED.

11. The LED device of claim 10, wherein the second LED is arranged on a central portion of the top surface, and the first LEDs surround to the second LED.

12. The LED device of claim 10, wherein the lens comprises a light input surface facing the top surface of the substrate and a light output surface opposite to the light input surface, the light output surface comprising the convergent part and the divergent parts.

13. The LED device of claim 12, wherein the light input surface is a planar surface.

14. The LED device of claim 10, wherein the convergent part is a convex surface, and each of the divergent parts is a concave surface.

15. The LED device of claim 10, wherein each of the first LEDs is selected from a group consisting of blue LED, green LED, and blue-green LED.

16. The LED device of claim 10, wherein the second LED is a red LED.

17. The LED device of claim 10, wherein a phosphor covers the light emitting surface of each of the first LEDs.