Display device

• US 9,541,792 B2
• Filed: 10/30/2015
• Issued: 01/10/2017
• Est. Priority Date: 01/05/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sangtae, Bae, Seungchoon
• Primary Examiner(s): PAYNE, SHARON E
• Application Number:
  US14/928,841
• Publication Number:
  US 20160054622A1
• Time in Patent Office: 438 Days
• US Class Current: 1/1
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133605 including specially adapted reflectors
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 1/133611 including means for improving the brightness uniformity
• CPC Class Codes: G02F 1/133612 Electrical details
• CPC Class Codes: G02F 1/133628 with cooling means

Abstract

A display device includes a display panel, a backlight unit disposed at the back of the display panel, and a back cover disposed at the back of the backlight unit, wherein the backlight unit including a base layer, a plurality of substrates disposed on the base layer and separated from each other, and light sources disposed on the substrates.

Claims

1. A display device comprising:

a supporter comprising at least one first hole;

a plurality of substrates disposed on a first side of the supporter;

a plurality of light sources disposed on each of the plurality of substrates;

a plurality of first connectors disposed on each of the plurality of substrates;

a plurality of transmission lines disposed on each of the plurality of substrates, the plurality of transmission lines being configured to electrically connect each of the plurality of first connectors and at least one of the plurality of light sources;

a driving board disposed on a second side of the supporter and configured to supply a driving signal to the plurality of light sources, the second side of the supporter being an opposite side of the first side of the supporter;

a reflection layer disposed on the first side of the supporter, the reflection layer comprising a plurality of second holes corresponding to each of the plurality of light sources;

a second connector configured to electrically connect at least one of the plurality of first connectors and the driving board through the at least one first hole;

an optical sheet disposed above the plurality of light sources; and

a display panel disposed above the optical sheet,

wherein a size of the plurality of second holes is greater than a size of the plurality of light sources.

2. The display device of claim 1, wherein the plurality of substrates include a first substrate and a second substrate next to the first substrate, and wherein a gap between the first substrate and the second substrate is greater than a width of each of the plurality of substrates.

3. The display device of claim 1, wherein the plurality of first connectors are disposed on each of the plurality of substrates in a same side of the plurality of light sources.

4. The display device of claim 1, further comprising an adhesive layer disposed between the supporter and the plurality of substrates,

wherein the adhesive layer is configured to attach the plurality of substrates to the supporter.

5. The display device of claim 1,

wherein the reflection layer comprises:

a first portion overlapping with the plurality of substrates; and

a second portion overlapping with the supporter.

6. The display device of claim 5, wherein a width of the first portion is less than a width of the second portion.

7. The display device of claim 1, wherein the plurality of first connectors are disposed on each of the plurality of substrates in an opposite side of the plurality of light sources.

8. The display device of claim 1, further comprising:

a first resin layer covering the plurality of substrates and the plurality of light sources; and

a first shielding pattern disposed on the first resin layer.

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

a second resin layer covering the first resin layer and the first shielding pattern; and

a second shielding pattern disposed on the second resin layer.

10. The display device of claim 5, further comprising a plurality of protrusions disposed on the reflection layer,

wherein a distance between a first protrusion and a second protrusion adjacent to the first protrusion is greater than a distance between the first protrusion and a third protrusion adjacent to the first protrusion, and

wherein the first protrusion is disposed between the second protrusion and the third protrusion.

11. The display device of claim 1, wherein the second connector is a cable.

12. The display device of claim 1, wherein a plurality of grooves are formed in the supporter, and the plurality of substrates are positioned in the grooves.

13. The display device of claim 12, wherein a depth of the plurality of grooves is greater than a height from a bottom of the plurality of substrates to a top of the plurality of light sources.

14. The display device of claim 12, wherein a depth of the plurality of grooves is less than a thickness of the plurality of substrates.

15. The display device of claim 12, wherein a depth of the plurality of grooves is less than a height of the plurality of substrates.

16. The display device of claim 5, wherein the first portion of the reflection layer is spaced apart by a predetermined distance from the plurality of light sources.

17. The display device of claim 1, wherein the plurality of substrates are separated from each other.

18. The display device of claim 4, wherein the adhesive layer is configured to include a thermally conductive material to transmit heat.

19. The display device of claim 1, wherein the reflection layer is formed by coating a resin on an upper surface of the plurality of substrates and the supporter.

20. The display device of claim 1, wherein the supporter includes at least one of a base layer and a frame.

21. The display device of claim 1, wherein the size of the plurality of second holes is less than a size of a width of the plurality of substrates.

22. The display device of claim 1, further comprising a plurality of holders disposed on the first side of the supporter and configured to fix the plurality of substrates to the supporter.

23. The display device of claim 6, wherein the width of the first portions is the shortest distance between an edge of the plurality of light sources and an edge of the plurality of substrates, and

the width of the second portions is a distance of a gap between two adjacent substrates.

24. A display device comprising:

a supporter comprising at least one first hole;

a plurality of substrates disposed on a first side of the supporter;

an adhesive layer disposed between the supporter and the plurality of substrates, and attaching the plurality of substrates to the supporter;

a plurality of light sources disposed on each of the plurality of substrates;

a plurality of connectors disposed on each of the plurality of substrates;

a plurality of transmission lines disposed on each of the plurality of substrates, the plurality of transmission lines being configured to electrically connect each of the plurality of connectors and at least one of the plurality of light sources;

a driving board disposed on a second side of the supporter and configured to supply a driving signal to the plurality of light sources, the second side of the supporter being an opposite side of the first side of the supporter;

a reflection layer disposed on the first side of the supporter, the reflection layer comprising a plurality of second holes corresponding to each of the plurality of light sources;

a cable configured to electrically connect at least one of the plurality of connectors and the driving board through the at least one first hole;

an optical sheet disposed above the plurality of light sources; and

a display panel disposed above the optical sheet,

wherein a size of the plurality of second holes is greater than a size of the plurality of light sources.

25. The display device of claim 24, wherein the plurality of connectors are disposed on each of the plurality of substrates on the same side of the plurality of light sources.

26. The display device of claim 24, wherein the plurality of connectors are disposed on each of the plurality of substrates in an opposite side of the plurality of light sources.

27. The display device of claim 24, wherein the reflection layer comprises:

a first portion overlapping with the plurality of substrates; and

a second portion overlapping with the supporter,

wherein the first portion of the reflection layer is spaced apart by a predetermined distance from the plurality of light sources.

28. The display device of claim 27, wherein the reflection layer is formed by coating a resin on an upper surface of the plurality of substrates and the supporter.

29. The display device of claim 24, wherein the supporter includes at least one of a base layer and a frame.