OPTICAL DEVICE

• US 20090129085A1
• Filed: 11/16/2007
• Published: 05/21/2009
• Est. Priority Date: 11/16/2007
• Status: Active Grant

• Current Assignee: Document Security Systems, Inc.
• Original Assignee: Avago Technologies ECBU IP Singapore Pte Limited (Broadcom, Inc.)
• Inventors: Lee, Chiau Jin, Ng, Keat Chuan, Tan, Kheng Leng, Ong, Kiam Soon, Aizar, Abdul Karim Norfidathul
• Granted Patent: US 7,524,087 B1
• Time in Patent Office: Days
• US Class Current: 362/247
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 33/483 Containers
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

An exemplary embodiment of an optical device may include a lead frame with a plurality of leads and a reflector housing formed around the lead frame. The reflector housing includes a first end face and a second end face and a peripheral sidewall extending between the first end face and the second end face. The reflector housing includes a first pocket with a pocket opening in the first end face and a second pocket with a pocket opening in the second end face. At least one LED die is mounted in the first pocket of the reflector housing, and a light transmitting encapsulant is disposed in the first pocket and encapsulating the at least one LED die.

Claims

1. An optical device comprising:

a lead frame with a plurality of leads;

a reflector housing formed around the lead frame, the reflector housing having a first end face and a second end face and a peripheral sidewall extending between the first end face and the second end face, the reflector housing having a first pocket with a pocket opening in the first end face and a second pocket with a pocket opening in the second end face;

at least one LED die mounted in the first pocket of the reflector housing;

a light transmitting encapsulant disposed in the first pocket and encapsulating the at least one LED die; and

wherein a plurality of lead receiving compartments are formed in the peripheral sidewall of the reflector housing.

3. The optical device of claim 1, wherein the combined volume of the second pocket and the lead receiving compartments is at least 50% of the volume of the first pocket.

4. The optical device of claim 1, wherein the plurality of lead receiving compartments define a plurality of ribs disposed between the plurality of lead receiving compartments.

5. The optical device of claim 3, said plurality of leads being J-shaped.

6. The optical device of claim 3, said plurality of leads comprising six leads in two rows.

7. The optical device of claim 3, said plurality of lead receiving compartments being J-shaped.

8. The optical device of claim 1, said at least one LED die comprising three LED dies.

9. The optical device of claim 8, said three LED dies comprising at least two colors.

2. (canceled)

10. A display comprising a plurality of plastic leaded chip carrier LEDs, the plastic leaded chip carrier LEDs each comprising:

a lead frame with a plurality of leads;

a reflector housing formed around the lead frame, the reflector housing having a first end face and a second end face and a peripheral sidewall extending between the first end face and the second end face, the reflector housing having a cavity in the first end face, said peripheral sidewall having a plurality of lead receiving compartments formed therein;

at least one LED die mounted in the cavity of the reflector housing; and

a light transmitting encapsulant disposed in the cavity and encapsulating the at least one LED die.

11. The display of claim 10, said reflector housing further comprising a second cavity in the second end face.

12. The display of claim 11, wherein the plurality of lead receiving compartments define a plurality of ribs disposed between the plurality of lead receiving compartments.

13. The display of claim 12, said plurality of leads being J-shaped.

14. The display of claim 10, wherein said lead receiving compartments limit inward deflection of said plurality of leads.

15. The display of claim 10, wherein said display comprises a stadium display.

16. An illumination system, comprising:

a reflector housing molded on a lead frame having a plurality of electrically conductive leads, the reflector housing having a first cavity and a second cavity on opposite sides of the reflector housing;

at least one LED die mounted in said first cavity and electrically connected to said plurality of electrically conductive leads; and

said reflector housing further having a first end face and a second end face and a peripheral sidewall extending between the first end face and the second end face, the reflector housing having a cavity in the first end face, said peripheral sidewall having a plurality of lead receiving compartments formed therein.

17. The illumination system of claim 16, wherein said plurality of electrically conductive leads have a J-shape.

18. The illumination system of claim 16, further comprising an encapsulant filling said first cavity around said at least one LED die.

19. The illumination system of claim 16, further comprising a plurality of other reflector housings each having at least one LED die mounted, said reflector housing and said plurality of other reflector housings arranged in an array in a display.

20. The illumination system of claim 19, said display comprising a stadium display.