Mobile terminal

• US 10,295,157 B2
• Filed: 01/22/2018
• Issued: 05/21/2019
• Est. Priority Date: 01/24/2017
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Changhwan, Kang, Jinwon, Kim, Hangtae, Shin, Yunsup, Lee, Minyoung, Cho, Ayoung
• Primary Examiner(s): Hines, Anne M
• Application Number:
  US15/877,317
• Publication Number:
  US 20180209616A1
• Time in Patent Office: 484 Days
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: F21V 19/0025 the fastening means engaging the conductors of the light source, i.e. providing simultaneous fastening of the light sources and their electric connections
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• 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 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H01L 33/64 Heat extraction or cooling elements
• CPC Class Codes: H04N 13/254 in combination with electromagnetic radiation sources for illuminating objects
• CPC Class Codes: H05K 1/0203 Cooling of mounted components H05K1/0272 takes precedence
• CPC Class Codes: H05K 1/181 associated with surface mounted components
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]

Abstract

A lighting device includes a printed circuit board (PCB), a submount mounted on the PCB, a die mounted on the submount and including a plurality of light emitting devices, and a pad inserted into a hole formed in the submount such that the die and the PCB are electrically connected through the submount, connected to the die by a wire bonding, and electrically connected to the PCB.

Claims

1. A lighting device comprising:

a printed circuit board (PCB);

a submount mounted on the PCB;

a die mounted on the submount and including a plurality of light emitting devices; and

a pad inserted into a hole formed in the submount such that the die and the PCB are electrically connected through the submount, connected to the die by a wire bonding, and electrically connected to the PCB.

2. The lighting device of claim 1, wherein

the plurality of light emitting devices provided in the die and the PCB are electrically connected by penetrating through the submount through the pad inserted into the submount.

3. The lighting device of claim 1, further comprising:

a holder provided on the PCB and formed to cover the die and the submount.

4. The lighting device of claim 3, wherein

the holder is provided to have an internal space between the die and the holder.

5. The lighting device of claim 4, further comprising:

a diffractive optical element (DOE) disposed in the internal space and disposed by the holder.

6. The lighting device of claim 1, further comprising:

a holder disposed on the submount, provided to cover the die, and having an internal space.

7. The lighting device of claim 6, wherein

heat generated in the die is dissipated through a side surface of the submount and the PCB.

8. The lighting device of claim 1, wherein

the die is disposed on one surface of the PCB,

the submount is mounted on the other surface of the PCB opposing the one surface of the PCB on which the die is disposed, and

the lighting device further comprising:

a heat dissipation member inserted into a hole provided in the PCB such that heat generated in the die is transmitted to the submount through the PCB, and connected to one surface of the PCB and the submount mounted on the other surface of the PCB.

9. The lighting device of claim 8, further comprising:

a holder disposed on one surface of the PCB, provided to cover the die, and having an internal space.

10. The lighting device of claim 1, wherein

the submount is provided such that an area thereof in contact with the die and an area thereof in contact with the PCB are equal, and

the die is directly electrically connected to the PCB by a wire bonding.

11. The lighting device of claim 1, wherein

the die is disposed on a first PCB formed as a metal member,

the die and the first PCB are connected by a wire bonding, and

the lighting device further comprising:

a second PCB disposed to be spaced apart from the first PCB by a predetermined distance and electrically connected to the first PCB through a cable.

12. The lighting device of claim 11, further comprising:

a holder disposed on the first PCB, provided to cover the die, and having an internal space.

13. The lighting device of claim 1, wherein

a plurality of anode electrodes electrically connected to the plurality of light emitting devices are provided on one surface of the die, and

a single cathode electrode electrically connected to the plurality of light emitting devices is provided on the other surface opposing the one surface of the die.

14. The lighting device of claim 13, wherein

the plurality of anode electrodes and the pad are connected by a wire bonding.

15. The lighting device of claim 1, wherein

a plurality of cathode electrodes electrically connected to the plurality of light emitting devices are provided on one surface of the die, and

a single anode electrode electrically connected to the plurality of light emitting devices is provided on the other surface opposing the one surface of the die.

16. The lighting device of claim 3, wherein

a lens allowing light output from the plurality of light emitting devices provided in the die to transmit therethrough is provided in the holder.

17. The lighting device of claim 16, wherein

the lens is a telecentric lens.

18. The lighting device of claim 1, wherein

the die includes a plurality of sub-dies,

the plurality of light emitting devices are disposed in the plurality of sub-dies, and

the plurality of sub-dies are disposed in a 2 columns and n rows or n columns and 2 rows.

19. A mobile terminal comprising:

a lighting device described in claim 1.

20. A mobile terminal including the lighting device of claim 1, wherein

the die includes a plurality of sub-dies,

the plurality of light emitting devices are disposed in the plurality of sub-dies, and

the mobile terminal further comprising:

a controller independently controlling the plurality of light emitting devices by sub-dies.