Backlight assembly and display apparatus including the same

Patent metadata

Field	Value
Publication number	US-9588280-B2
Application number	US-201414303814-A
Country	US
Kind code	B2
Filing date	Jun 13, 2014
Priority date	Nov 13, 2013
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A backlight assembly includes a plurality of first light sources configured to emit a first color, and a plurality of second light sources configured to emit a second color different from the first color, where the backlight assembly is divided in a first boundary area, a second boundary area spaced apart from the first boundary area in a first direction, and a middle area between the first boundary area and the second boundary area, and an arrangement direction of first and second light sources of the plurality of first and second light sources in the first and second boundary areas is different from an arrangement direction of first and second light sources of the plurality of first and second light sources in the middle area.

First claim

What is claimed is:

1. A backlight assembly comprising:
a plurality of first light sources configured to emit a first color; and
a plurality of second light sources configured to emit a second color different from the first color,
wherein the backlight assembly is divided into a first boundary area, a second boundary area spaced apart from the first boundary area in a first direction, and a middle area between the first boundary area and the second boundary area,
wherein an arrangement direction of a first set of first and second light sources of the plurality of first and second light sources disposed on a same substrate in each of the first and second boundary areas is different from an arrangement direction of a second set of first and second light sources of the plurality of first and second light sources in the middle area, and
wherein each of the plurality of the first light sources includes two contiguous first light sources defining an arrangement direction of the two contiguous first light sources, the two contiguous first light sources both emit the first color, and each of the plurality of the second light sources includes two contiguous second light sources defining an arrangement direction of the two contiguous second light sources, the two contiguous second light sources both emit the second color,
wherein the backlight assembly further comprises:
a first substrate which extends in a second direction which is substantially perpendicular to the first direction, and has a width in a third direction which is substantially perpendicular to the first and second directions; and
a light guiding plate adjacent to the first substrate;
wherein first and second light sources of the plurality of first and second light sources are disposed on the first substrate,
wherein the light guiding plate has a light incident surface and a light exiting surface connected to the light incident surface, the light incident surface and the light exiting surface are substantially perpendicular to each other, the light incident surface faces the first and second light sources.

2. The backlight assembly of claim 1 , further comprising:
a first substrate which extends in a second direction which is substantially perpendicular to the first direction, and has a width in a third direction which is substantially perpendicular to the first and second directions; and
a light guiding plate adjacent to the first substrate,
wherein first and second light sources of the plurality of first and second light sources are disposed on the first substrate.

3. The backlight assembly of claim 2 , wherein the first and second light sources in the first boundary area are disposed adjacent to each other in the third direction,
the first and second light sources in the middle area are disposed adjacent to each other in the second direction, and
the first and second light sources in the second boundary area are disposed adjacent to each other in the third direction.

4. The backlight assembly of claim 3 , wherein
each of the plurality of first light sources comprises a first-a light source and a first-b light source,
each of the plurality of second light sources comprises a second-a light source and a second-b light source,
the first-a light source and the first-b light source are electrically connected in serial, and
the second-a light source and the second-b light source are electrically connected in serial.

5. The backlight assembly of claim 4 , wherein
the plurality of first and second light sources receives a power voltage,
the first-a light source and the first-b light source receive a first driving signal, and
the second-a light source and the second-b light source receive a second driving signal which is different from the first driving signal.

6. The backlight assembly of claim 4 , wherein
the first-a and second-a light sources in the first boundary area are disposed adjacent each other in the third direction,
the first-b light source and the second-b light source in the middle area are disposed adjacent each other in the second direction.

7. The backlight assembly of claim 3 , wherein
each of the plurality of first and second light sources has a width, and a length larger than the width, in a plan view,
each of the plurality of first and second light sources includes a first light emitting diode, and a second light emitting diode spaced part from the first light emitting diode, in a length direction of the plurality of first and second light sources.

8. The backlight assembly of claim 3 , further comprising:
a plurality of light source packages, each including one of the first light sources and one of the second light sources,
wherein the plurality of light source packages is arranged in the second direction on the first substrate.

9. The backlight assembly of claim 2 , further comprising:
a second substrate spaced apart from the first substrate, and facing the second substrate,
wherein
first and second light sources of the plurality of first and second light sources are disposed on the second substrate, and
the light guiding plate is disposed between the first substrate and the second substrate.

10. The backlight assembly of claim 9 , wherein
each of the first light sources of the first substrate faces a corresponding second light source among the second light sources of the second substrate, and
each of the second light sources of the first substrate faces a corresponding first light source among the first light sources of the second substrate.

11. The backlight assembly of claim 1 , wherein the plurality of first and second light sources is arranged in a matrix shape in the first direction and a second direction substantially perpendicular to the first direction.

12. The backlight assembly of claim 11 , further comprising:
a first light source bar which extends in the second direction, is disposed in the first boundary area and comprises one of the plurality of first light sources and one of the plurality of second light sources disposed adjacent to each other in the second direction;
a second light source bar which is spaced apart from the first light source bar in the first direction, disposed in the middle area and comprises one of the plurality of first light sources and one of the plurality of second light sources disposed adjacent to each other in the first direction;
a third light source bar spaced apart from the second light source bar in the first direction, disposed in the second boundary area, and comprises one of the plurality of first light sources and one of the plurality of second light sources disposed adjacent to each other in the second direction; and
a light source driving part electrically connected to the first to third light source bars.

13. The backlight assembly of claim 12 , wherein the first and second light sources disposed in an end of the first light source bar in the second direction are disposed adjacent each other in a fourth direction different from the first and second directions.

14. The backlight assembly of claim 12 , further comprises:
a receiving container which receives the first to third light source bars and the light source driving part;
a reflecting sheet which is received in the receiving container, and is disposed on the first to third light source bars, and
openings which are defined in the reflecting sheet and expose the first and second light sources.

15. The backlight assembly of claim 1 , wherein
the first color is yellow and the second color is blue,
the first color is magenta and the second color is green, or
the first color i

Assignees

• Samsung Display Co Ltd

Inventors

• Im Hyun-Deok
• Kang Jong-Hyuk
• Kwon Jung-Hyun
• Park Jae-Byung
• Park Hae-Il
• Lee Dong-Hoon

Classifications

• G02B6/009

  of the light source in the package (G02B6/0021 takes precedence) · CPC title

• G02B6/0068 Primary

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title

• G02F1/133615

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

• G02F2001/133613

  Physics · mapped topic

• G02F1/133603

  with LEDs · CPC title