LED light strip wherein the LEDs overlap in projection backlight and display device having the same

Patent metadata

Field	Value
Publication number	US-9651235-B2
Application number	US-201414422132-A
Country	US
Kind code	B2
Filing date	Jul 9, 2014
Priority date	Jan 28, 2014
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

The LED light strip according to the present disclosure may include a circuit board and a plurality of LEDs which are arranged and spaced on the circuit board along a first straight line. A gap may be formed between two adjacent LEDs. Projections of two adjacent LEDs on a first projection plane may at least partially overlap, and the first projection plane may be a plane perpendicular to the circuit board and parallel to the first straight line.

First claim

What is claimed is:

1. A light emitting diode (LED) light strip, comprising a circuit board and a plurality of LEDs which are arranged and spaced on the circuit board along a first straight line, wherein a gap is formed between two adjacent LEDs;
wherein projections of two adjacent LEDs on a first projection plane at least partially overlap, and the first projection plane is a plane perpendicular to the circuit board and parallel to the first straight line; and
wherein shapes and structures of each of the plurality of LEDs are not all the same.

2. The LED light strip according to claim 1 , wherein the circuit board is a strip-shaped circuit board extending along the first straight line, and comprises two long sides with longer lengths and two short sides with shorter lengths,
wherein widths of the gap from an end near to one long side of the two long sides to an end near to the other long side of the two long sides are the same.

3. The LED light strip according to claim 1 , wherein shapes and structures of some of the plurality of LEDs are the same.

4. The LED light strip according to claim 3 , wherein
each of the LEDs comprises a first side end and a second side end opposite to the first side end, the first side end has a first protrusion and the second side end has a second protrusion; wherein
the first side end of each of the LEDs is arranged near to the second side end of an adjacent LED, and a gap is formed between the first side end and the second side end;
the first protrusion of the first side end of each of the LEDs is interlaced with and matches the second protrusion of the second side end of the adjacent LED, and projections of the first protrusion and the second protrusion on the first projection plane at least partially overlap.

5. The LED light strip according to claim 4 , wherein
some of the shapes of projections of the LEDs on a plane on which the circuit board is located are parallelograms, the parallelograms each comprises a first acute angle and a second acute angle diagonally arranged,
wherein the first protrusion of each of the parallelogram shaped LEDs is formed on a portion corresponding to the first acute angle, and the second protrusion of each of the parallelogram shaped LEDs is formed on a portion corresponding to the second acute angle.

6. The LED light strip according to claim 4 , wherein
the first side end of each of the LEDs is arranged to have a first sawtooth structure, and the first sawtooth structure forms the first protrusion;
the second side end of each of the LEDs is arranged to have a second sawtooth structure which matches the first sawtooth structure, and the second sawtooth structure forms the second protrusion.

7. The LED light strip according to claim 4 , wherein
the first side end of each of the LEDs is arranged to have a first curved protrusion structure, and the first curved protrusion structure forms the first protrusion;
the second side end of each of the LEDs is arranged to have a second curved protrusion structure which matches the first curved protrusion structure, and the second curved protrusion structure forms the second protrusion.

8. The LED light strip according to claim 3 , wherein
each of the LEDs comprises a first side end and a second side end opposite to the first side end, the first side end has a first protrusion and the second side end has a second protrusion; wherein
the first side end of each of the LEDs is arranged near to the first side end of an adjacent LED, and a first gap is formed between the two first side ends;
the second side end of each of the LEDs is arranged near to the second side end of a second adjacent LED, and a second gap is formed between the two second side ends;
wherein the first protrusion of the first side end of each of the LEDs is interlaced with and matches the first protrusion of the first side end of the adjacent LED, and projections of the first protrusion of the first side end of each of the LEDs and the first protrusion of the first side end of the adjacent LED on the first projection plane at least partially overlap;
wherein the second protrusion of the second side end of each of the LEDs is interlaced with and matches the second protrusion of second side end of the second adjacent LED, and projections of the second protrusion of the second side end of each of the LEDs and the second protrusion of the second side end of the second adjacent LED on the first projection plane at least partially overlap.

9. The LED light strip according to claim 8 , wherein
some of the shapes of projections of the LEDs on a plane on which the circuit board is located are trapezoids, the trapezoids each comprises a third acute angle and a fourth acute angle, wherein the first protrusion of each of the trapezoid shaped LEDs is formed on a portion corresponding to the third acute angle, and the second protrusion of each of the trapezoid shaped LEDs is formed on a portion corresponding to the fourth acute angle.

10. The LED light strip according to claim 9 , wherein
the trapezoids are isosceles trapezoids.

11. The LED light strip according to claim 8 , wherein
some of the shapes of projections of the LEDs on a plane on which the circuit board is located are triangles, the triangles each comprises a fifth acute angle and a sixth acute angle, wherein the first protrusion of each of the triangle shaped LEDs is formed on a portion corresponding to the fifth acute angle, and the second protrusion of each of the triangle shaped LEDs is formed on a portion corresponding to the sixth acute angle.

12. The LED light strip according to claim 11 , wherein
the triangles are isosceles triangles.

13. The LED light strip according to claim 1 , wherein shapes of the LEDs include at least one of parallelograms, trapezoids and triangles.

14. A backlight, comprising:
a light guide plate, comprising a light-entering surface, a light-exiting surface adjacent to the light-entering surface and a bottom surface opposite to the light-exiting surface; and
a light emitting diode (LED) light strip, which is arranged on a light-entering side of the light guide plate,
wherein the LED light strip comprises a circuit board and a plurality of LEDs which are arranged and spaced on the circuit board along a first straight line, wherein a gap is formed between two adjacent LEDs;
wherein projections of two adjacent LEDs on a first projection plane at least partially overlap, and the first projection plane is a plane perpendicular to the circuit board and parallel to the first straight line; and
wherein the light-exiting surface and the first projection plane are in a same plane; and
wherein shapes and structures of each of the plurality of LEDs are not all the same.

15. The backlight according to claim 14 , wherein the circuit board is a strip-shaped circuit board extending along the first straight line, and comprises two long sides with longer lengths and two short sides with shorter lengths,
wherein widths of the gap from an end near to one long side of the two long sides to an end near to the other long side of the two long sides are the same.

16. The backlight according to claim 14 , wherein shapes and structures of some of the plurality of LEDs are the same.

17. The backlight according to claim 14 , wherein shapes of the LEDs include at least one of parallelogram, trapezoid and triangle.

18. A display device, comprising a backlight,
wherein the backlight comprises:
a light guide plate, comprising a light-entering surface, a light-exiting surface adjacent to the light-enteri

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Display Tech Co

Inventors

• Wang Hetao
• Lu Kun
• Bai Ling
• Bu Zhanchang

Classifications

• G02B6/0073

  Light emitting diode [LED] · CPC title

• F21V29/10 Primary

  Arrangement of heat-generating components to reduce thermal damage, e.g. by distancing heat-generating components from other components to be protected · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title

• G02F1/133615

  Edge-illuminating devices, i.e. illuminating from the side · CPC title