Light source assembly, display apparatus having the same and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9310645-B2
Application number	US-201414217818-A
Country	US
Kind code	B2
Filing date	Mar 18, 2014
Priority date	Oct 22, 2013
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A light source assembly includes a substrate extending in a first direction, and a plurality of light source parts arranged in the first direction. The light source part includes a light source disposed on the substrate to generate light, a first reflecting element disposed on the substrate and having a first opening which exposes the light source, a second reflecting element disposed on a first reflecting element and having a second opening which exposes the light source, the second reflecting element being smaller than the first reflecting element in a plan view, and a lens disposed on the light source and the second reflecting element to diffuse the light from the light source.

First claim

What is claimed is:

1. A light source assembly comprising:
a substrate extending in a first direction; and
a plurality of light source parts arranged in the first direction, on the substrate,
wherein among the plurality of light source parts arranged on the substrate, each light source part comprises:
a light source which is on the substrate and generates light, provided in plural;
a first reflecting element on the substrate, provided in plural to be disconnected from each other along the substrate, and a first opening which is defined in the first reflecting element and exposes the light source;
a second reflecting element on the first reflecting element, provided in plural to be disconnected from each other along the substrate, and a second opening which is defined in the second reflecting element and exposes the light source, wherein the second reflecting element is smaller than the first reflecting element in a plan view; and
a lens which is on the light source and the second reflecting element, and diffuses the light from the light source.

2. The light source assembly of claim 1 , wherein
the first reflecting element comprises a material configured to cause mirror reflection of light, and the second reflecting element comprises a material configured to cause diffuse reflection of light, or
the first reflecting element comprises the material configured to cause diffuse reflection of light, and the second reflecting element comprises the material configured to cause mirror reflection of light.

3. The light source assembly of claim 2 , wherein
the material configured to cause mirror reflection of light comprises silver or aluminum, and
the material configured to cause diffuse reflection of light comprises polyethylene phthalate and has a white color.

4. The light source assembly of claim 2 , wherein
each of the first and second reflecting elements has a circular sheet shape,
the lens has a hemisphere shape,
an external diameter of the first reflecting element is more than about 100% and less than about 130% of an external diameter of the lens, in the plan view, and
an external diameter of the second reflecting element is more than about 70% and less than 100% of the external diameter of the lens, in the plan view.

5. The light source assembly of claim 2 , further comprising a marker which is disposed on the substrate and indicates a position of the lens relative to the light source on the substrate.

6. The light source assembly of claim 5 , wherein the lens comprises:
a top surface having a dome shape, a bottom surface opposite to the top surface, and a fixing part protruded from the bottom surface, and
the fixing part is attached on the substrate and contacts the marker on the substrate.

7. The light source assembly of claim 6 , wherein
the lens further comprises a fixing protrusion protruded from the fixing portion,
the marker is a fixing hole defined through the substrate, and
the fixing protrusion is in the fixing hole.

8. The light source assembly of claim 6 , wherein
the marker on the substrate comprises three discrete points corresponding to vertexes Of a triangle which has a center at the light source, and
the fixing portion of the lens corresponds to the three discrete points.

9. The light source assembly of claim 8 , wherein the first opening of the first reflecting element is larger than the second opening of the second reflecting element.

10. A light source assembly comprising:
a substrate extending in a first direction; and
a plurality of light source parts arranged in the first direction, on the substrate, provided in plural,
wherein among the plurality source parts arranged on the substrate, each light source comprises:
a light source which is on the substrate and generates light;
a first reflecting element on the substrate, provided in plural to be disconnected from each other along the substrate and comprising:
a first area, and a second area adjacent to the first area, and
a plurality of beads which is in the second area and diffuses the light in the second area;

a first opening which is defined in the first reflecting element and exposes the light source; and
a lens which is on the light source and the first reflecting element, and diffuses the light.

11. The light source assembly of claim 10 , wherein
the first reflecting element comprises a material configured to cause diffuse reflection of light, and the first area is adjacent to the light source and between the light source and the second area in a plan view, or
the first reflecting element comprises a material configured to cause mirror reflection of light, and the second area is adjacent to the light source and between the light source and the first area in the plan view.

12. A display apparatus comprising:
a liquid crystal display panel which displays an image;
a light source assembly which generates and supplies light to the liquid crystal display panel, and is under the liquid crystal display panel;
a reflecting sheet between the liquid crystal display panel and the light source assembly, and a plurality of lens openings defined in the reflecting sheet; and
a receiving container which receives the liquid crystal display panel, the light source assembly and the reflecting sheet, and comprises a bottom portion, and side walls extending from the bottom portion substantially perpendicular to the bottom portion,
wherein the light source assembly comprises:
a substrate which extends in a first direction and is on the bottom portion of the receiving container; and
a plurality of light source parts arranged in the first direction, on the substarte,
wherein among the plurality of light source parts arranged on the substrate, each light source part comprises:
a light source which is on the substrate and generates the light, provided in plural;
a first reflecting element on the substrate, provided in plural to be disconnected from each other along the substrate, and a first opening which is defined in the first reflecting element and exposes the light source;
a second reflecting element which is on the first reflecting element, provided in plural to be disconnected from each other along the substrate, and a second opening which is defined in the second reflecting element and exposes the light source, wherein the second reflecting element is smaller than the first reflecting element in a plan view; and
a lens which is on the light source and the second reflecting element, and diffuses the light from the light source, and

wherein the lens openings of the reflecting sheet respectively correspond to the light source parts of the light source assembly.

13. The display apparatus of claim 12 , wherein
the first reflecting element comprises a material configured to cause mirror reflection of light, and the second reflecting element comprises a material configured to cause diffuse reflection of light, or
the first reflecting element comprises the material configured to cause diffuse reflection of light, and the second reflecting element comprises the material configured to cause mirror reflection of light.

14. The display apparatus of claim 13 , wherein a portion of the corresponding lens of the light source part of the light source assembly is above a corresponding lens opening of the reflecting sheet.

15. The display apparatus of claim 14 , wherein in the plan view, the lens opening of the reflecting sheet is larger than the lens of the light source part of the light source assembly, and is smaller than the first reflecting element of the light source part of the light source

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Lu-Ly
• Lee Dong-Hyeon
• Park Young-Min

Classifications

• G02F1/133606 Primary

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

• G02F1/133605 Primary

  including specially adapted reflectors · CPC title

• G02F1/133603

  with LEDs · CPC title

• G02F2001/133607

  Physics · mapped topic

• G02F1/133607

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