Display device

Patent metadata

Field	Value
Publication number	US-10768484-B2
Application number	US-201916441910-A
Country	US
Kind code	B2
Filing date	Jun 14, 2019
Priority date	Jan 21, 2016
Publication date	Sep 8, 2020
Grant date	Sep 8, 2020

Abstract

A backlight unit including a frame having a bottom area and a sidewall area extended from the bottom area; a single substrate located in on the bottom area of the frame, a plurality of optical assemblies being mounted on the single substrate; a reflection sheet located the frame and configured to reflect light emitted by the optical assemblies; and an optical sheet located over the reflection sheet. Further, the reflection sheet a first sheet area corresponding to the bottom area of the frame; a second sheet area corresponding to the sidewall area of the frame; and a cut portion cut from the first sheet at one portion abutting on one side of the single substrate.

First claim

What is claimed is:

1. A backlight unit, comprising:
a frame having a bottom area and a sidewall area extended from the bottom area;
a substrate located on the bottom area of the frame;
a reflection sheet located on the substrate and having a hole;
a light source located on the substrate and disposed in the hole;
a lens located on the light source and comprising a first surface, a second surface forming a bottom surface of the lens and facing the first surface, a third surface connecting the first surface and the second surface; and
a plurality of lens extension parts extended outwardly from the third surface,
wherein the plurality of lens extension parts comprises at least one first lens extension part that overlaps at least a portion of the reflection sheet,
wherein a bottom surface of the at least one first lens extension part is substantially the same level as the second surface of the lens,
wherein the second surface of the lens comprises a concave part facing the light source,
wherein a mounting part of the second surface protrudes from the second surface between the concave part and the plurality of lens extension parts, and
wherein a height of the mounting part is smaller than a height of the at least one first lens extension part.

2. The backlight unit of claim 1 , wherein the at least one first lens extension part protrudes outward from the substrate.

3. The backlight unit of claim 1 , wherein at least a portion of the lens protrudes outward from the substrate.

4. The backlight unit of claim 1 , wherein a diameter of the lens is different depending on a location on the lens.

5. The backlight unit of claim 1 , wherein the reflection sheet comprises:
a first sheet area corresponding to the bottom area of the frame; and
a second sheet area corresponding to the sidewall area of the frame, and
wherein the second sheet area comprises a dot area configured to reduce an amount of reflected light.

6. The backlight unit of claim 1 , wherein the substrate comprises a substrate groove, and
wherein the mounting part of the lens is fixed to the substrate groove.

7. The backlight unit of claim 2 , wherein the plurality of lens extension parts further comprises at least one second lens extension part that overlaps the substrate.

8. The backlight unit of claim 4 , wherein a shape of the lens is oval.

9. The backlight unit of claim 7 , wherein a height of the second lens extension part is greater than the height of the mounting part.

10. The backlight unit of claim 7 , wherein a distance from the second surface of the lens to the at least one first lens extension part is different than a distance from the second surface of the lens to the second lens extension part.

11. The backlight unit of claim 7 , wherein shapes of the at least one first lens extension part and the second lens extension part are different from each other.

12. A display device, comprising:
a display panel;
a frame positioned at a back of the display panel and having a bottom area and a sidewall area extended from the bottom area;
a substrate located on the bottom area of the frame;
a reflection sheet located on the substrate and having a hole;
a light source located on the substrate and disposed in the hole;
a lens located on the light source and comprising a first surface, a second surface forming a bottom surface of the lens and facing the first surface, a third surface connecting the first surface and the second surface; and
a plurality of lens extension parts extended outwardly from the third surface,
wherein the plurality of lens extension parts comprise at least one first lens extension part that overlaps at least a portion of the reflection sheet,
wherein a bottom surface of the at least one first lens extension part is substantially the same level as the second surface of the lens,
wherein the second surface of the lens comprises a concave part facing the light source,
wherein a mounting part of the second surface protrudes from the second surface between the concave part and the plurality of lens extension parts, and
wherein a height of the mounting part is less than a height of the at least one first lens extension part.

13. The display device of claim 12 , wherein the at least one first lens extension part protrudes outward from the substrate.

14. The display device of claim 12 , wherein at least a portion of the lens protrudes outward from the substrate.

15. The display device of claim 12 , wherein a diameter of the lens is different depending on a location on the lens.

16. The display device of claim 12 , wherein the reflection sheet comprises:
a first sheet area corresponding to the bottom area of the frame; and
a second sheet area corresponding to the sidewall area of the frame, and
wherein the second sheet area comprises a dot area configured to reduce an amount of reflected light.

17. The display device of claim 12 , wherein the substrate comprises a substrate groove, and
wherein the mounting part is fixed to the substrate groove.

18. The display device of claim 13 , wherein the plurality of lens extension parts comprise at least one second lens extension part that overlaps the substrate.

19. The display device of claim 15 , wherein a shape of the lens is oval.

20. The display device of claim 18 , wherein a height of the second lens extension part is greater than the height of the mounting part.

21. The display device of claim 18 , wherein a distance from the second surface of the lens to the at least one first lens extension part is different than a distance from the second surface of the lens to the second lens extension part.

22. The display device of claim 18 , wherein shapes of the at least one first lens extension part and the second lens extension part are different from each other.

Assignees

• Lg Electronics Inc
• Lg Electrunecs Inc

Inventors

• Kim Jeonggyu
• Han Jongho
• Kim Eunseok
• Lee Uihyung
• Joung Juyoung
• Park Jinsin

Classifications

• G02F1/133606 Primary

  including a specially adapted diffusing, scattering or light controlling members · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title

• G02F1/133605

  including specially adapted reflectors · CPC title

• G02F1/133607

  the light controlling member including light directing or refracting elements, e.g. prisms or lenses · CPC title

• G02F2201/46

  Fixing elements · CPC title