Display apparatus including sub-light source groups

• US 8,698,789 B2
• Filed: 01/13/2010
• Issued: 04/15/2014
• Est. Priority Date: 08/14/2009
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Park, Young-Min, Kim, Gicherl, Park, Sang-Il, Song, Hee-Kwang, Shin, Ho-Sik
• Primary Examiner(s): Mengistu, Amare
• Assistant Examiner(s): Nadkarni, Sarvesh J
• Application Number:
  US12/686,679
• Publication Number:
  US 20110037685A1
• Time in Patent Office: 1,553 Days
• Field of Search: 345/87, 345/102, 362/229, 362/29
• US Class Current: 345/211
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0078 Side-by-side arrangements, e.g. for large area displays
• CPC Class Codes: G02F 1/133601 for spatial active dimming
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side
• CPC Class Codes: G09G 3/342 using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines

Abstract

A display apparatus includes; a display panel which displays an image using a light, wherein the display panel is divided into a plurality of display areas corresponding to the image, a plurality of main-light source groups which each have a plurality of light sources, wherein the main-light source groups are arranged respectively corresponding to the display areas to provide the light thereto, a power source circuit is connected to each main-light source groups to provide a corresponding driving power to each of the main-light source groups, and a plurality of sub-light source groups, each of which is arranged between two adjacent main-light source groups and wherein each sub-light group receives the driving power applied to each of the two main-light source groups adjacent thereto to provide a light corresponding to an average brightness of the two adjacent main-light source groups to a border area between two adjacent display areas.

Claims

1. A display apparatus comprising:

a display panel which displays an image using a light, wherein the display panel is divided into a plurality of display areas corresponding to the image;

a plurality of main-light source groups which each have a plurality of light sources, wherein the plurality of main-light source groups are respectively arranged corresponding to the plurality of display areas to provide the light to the plurality of display areas;

a power source circuit connected to each of the plurality of main-light source groups to supply a corresponding driving power to each main-light source group; and

a plurality of sub-light source groups, each of which is arranged between a first main-light source group and a second main-light source group of the plurality of main-light source groups and wherein a first sub-light group of the plurality of sub-light source groups receives a first driving power applied to the first main-light source groups and a second sub-light group of the plurality of sub-light source groups receives a second driving power applied to the second main-light source groups to provide a light corresponding to an average brightness of the first and second main-light source groups to a border area positioned between two adjacent display areas of the plurality of display areas, the second driving power separate from the first driving power,

wherein each of the sub-light source groups comprises a first light source and a second light source which receive the first driving power applied to the first main-light source group and a third light source and a fourth light source which receive the second driving power applied to the second main-light source group.

2. The display apparatus of claim 1, further comprising a circuit substrate comprising at least one layer on which the power source circuit is arranged, wherein the plurality of light sources are mounted thereon.

3. The display apparatus of claim 2, wherein each light source comprises a light emitting device which generates the light.

4. The display apparatus of claim 2, wherein each of the plurality of light sources comprises a first light emitting device, a second light emitting device and a third light emitting device which each generate the light.

5. The display apparatus of claim 1, wherein the first light source and the third light source are arranged corresponding to a single display area of the two adjacent display areas, and the second light source and the fourth light source are arranged corresponding to a remaining single display area of the two adjacent display areas.

6. The display apparatus of claim 5, wherein the circuit substrate comprises:

a first layer; and

a second layer disposed on the first layer,

wherein the power source circuit is arranged on each of the first layer and the second layer of the circuit substrate connects the light emitting device of the first light source to the light emitting device of the second light source, and connects the light emitting device of the third light source to the light emitting device of the fourth light source.

7. The display apparatus of claim 1, further comprising:

a light guide plate arranged adjacent to the plurality of main-light source groups and the plurality of sub-light source groups to guide the light emitted from the plurality of main-light source groups and the plurality of sub-light source groups to each of the display areas of the display panel.

8. A display apparatus comprising:

a display panel which displays an image using a light, wherein the display panel is divided into a plurality of display areas corresponding to the image;

a plurality of main-light source groups which each have a plurality of light sources, wherein the plurality of main-light source groups are respectively arranged corresponding to the plurality of display areas to provide the light to the plurality of display areas;

a power source circuit connected to each of the plurality of main-light source groups to supply a corresponding driving power to each main-light source group;

a plurality of sub-light source groups, each of which is arranged between a first main-light source group and a second main-light source group of the plurality of main-light source groups and wherein a first sub-light group of the plurality of sub-light source groups receives a first driving power applied to the first main-light source groups and a second sub-light group of the plurality of sub-light source groups receives a second driving power applied to the second main-light source groups to provide a light corresponding to an average brightness of the first and second main-light source groups to a border area positioned between two adjacent display areas of the plurality of display areas; and

,

a circuit substrate comprising at least one layer on which the power source circuit is arranged, wherein the plurality of light sources are mounted thereon,

wherein each of the light sources comprises a first light emitting device and a second light emitting device which generate the light, and

wherein each of the sub-light source groups comprises a first light source and a second light source disposed adjacent to each other, and each of the first light source and the second light source comprises a first light emitting device which receives the driving power applied to the first main-light source group and a second light emitting device which receives the second driving power applied to the second main-light source group.

9. The display apparatus of claim 8, wherein the first light source is arranged corresponding to a single display area among the two adjacent display areas, and the second light source is arranged corresponding to a remaining single display area of the two adjacent display areas.

10. The display apparatus of claim 9, wherein the circuit substrate comprises:

a first layer; and

a second layer disposed on the first layer,

wherein the power source circuit is arranged on each of the first layer and the second layer of the circuit substrate and connects the first light emitting device of the first light source to the first light emitting device of the second light source, and connects the second light emitting device of the first light source to the second light emitting device of the second light source.

11. A display apparatus comprising:

a display panel which displays an image using a light, wherein the display panel is divided into a plurality of display areas corresponding to the image;

a plurality of main-light source groups which each have a plurality of light sources, wherein the plurality of main-light source groups are respectively arranged corresponding to the plurality of display areas to provide the light to the plurality of display areas;

a power source circuit connected to each of the plurality of main-light source groups to supply a corresponding driving power to each main-light source group;

a plurality of sub-light source groups, each of which is arranged between a first main-light source group and a second main-light source group of the plurality of main-light source groups and wherein a first sub-light group of the plurality of sub-light source groups receives a first driving power applied to the first main-light source groups and a second sub-light group of the plurality of sub-light source groups receives a second driving power applied to the second main-light source groups to provide a light corresponding to an average brightness of the first and second main-light source groups to a border area positioned between two adjacent display areas of the plurality of display areas; and

a circuit substrate comprising at least one layer on which the power source circuit is arranged, wherein the plurality of light sources are mounted thereon,

wherein each of the plurality of light sources comprises a first light emitting device, a second light emitting device and a third light emitting device which each generate the light,

wherein each of the sub-light source groups comprises a first light source and a second light source disposed adjacent to each other, wherein the first light source comprises;

one light emitting device among the first, second and third light emitting devices which receives the driving power applied to one main-light source group of the two main-light source groups adjacent thereto; and

remaining two light emitting devices among the first, second, and third light emitting devices which receive the driving power applied to a remaining main-light source group of the two main-light source groups adjacent thereto, and

wherein the second light source comprises;

two light emitting devices among the first, second, and third light emitting devices which receive the driving power applied to one main-light source group of the two main-light source groups adjacent thereto; and

a remaining light emitting device among the first, second, and third light emitting devices which receives the driving power applied to a remaining main-light source group of the two main-light source groups adjacent thereto.

12. The display apparatus of claim 11, wherein the first light source is arranged corresponding to a single display area of the two adjacent display areas, and the second light source is arranged corresponding to a remaining single display area of the two adjacent display areas.

13. The display apparatus of claim 12, wherein the circuit substrate comprises:

a first layer; and

a second layer disposed on the first layer,

wherein the power source circuit is arranged on each of the first layer and the second layer of the circuit substrate, connects one light emitting device among the first, second, and third light emitting devices of the first light source to two light emitting devices among the first, second, and third light emitting devices of the second light source, and connects remaining two light emitting devices of the first light source to a remaining one light emitting device of the second light source.

14. A display apparatus comprising:

a display panel which displays an image using a light, wherein the display panel is divided into a plurality of display areas corresponding to the image;

a plurality of main-light source groups each having a plurality of light sources, wherein the plurality of main-light source groups are respectively arranged corresponding to the display areas and provide the light to the display areas;

a power source circuit connected to each of the plurality of main-light source groups, wherein the power source circuit supplies a corresponding driving power to the plurality of main-light source groups; and

at least one sub-light source group arranged between a first main-light source group of the plurality of main-light source groups and a second main-light source group of the plurality of main-light source groups, wherein the at least one sub-light source group is arranged adjacent to, and receives a first driving power applied to, the first main-light source group and wherein the at least one sub-light source group is arranged adjacent to, and receives a second driving power applied to, the second main-light source group and provides a light corresponding to an average brightness value of the first main-light source group and the second main-light source group to a border area of a first display area and a second display area that are arranged adjacent to one another and corresponding to the first main-light source group and the second main-light source group, respectively, the second driving power separate from the first driving power,

wherein each of the at least one sub-light source groups comprises a first light source and a second light source which receive the first driving power applied to the first main-light source group and a third light source and a fourth light source which receive the second driving power applied to the second main-light source group.

15. A display apparatus comprising:

a display panel which displays an image using a light, wherein the display panel is divided into a plurality of display areas corresponding to the image;

a plurality of main-light source groups which each have a plurality of light sources, wherein the plurality of main-light source groups are respectively arranged corresponding to the plurality of display areas to provide the light to the plurality of display areas;

a power source circuit connected to each of the plurality of main-light source groups to supply a corresponding driving power to each main-light source group; and

a plurality of sub-light source groups, each of which is arranged between two adjacent main-light source groups of the plurality of main-light source groups and wherein each sub-light group of the plurality of sub-light source groups receives the corresponding driving power applied to each of the two main-light source groups adjacent thereto to provide a light corresponding to an average brightness of the two adjacent main-light source groups to a border area positioned between two adjacent display areas of the plurality of display areas;

wherein each of the sub-light source groups comprises a first light source and a second light source which receive a first driving power of the corresponding driving power applied to one main-light source group of the two main-light source groups adjacent thereto and a third light source and a fourth light source which receive a second driving power of the corresponding driving power applied to a remaining main-light source group of the two main-light source groups adjacent thereto, the second driving power separate from the first driving power.

16. The display apparatus of claim 15, wherein the first light source and the third light source are arranged corresponding to a single display area of the two adjacent display areas, and the second light source and the fourth light source are arranged corresponding to a remaining single display area of the two adjacent display areas.

17. The display apparatus of claim 16, wherein the circuit substrate comprises:

a first layer; and

a second layer disposed on the first layer,

wherein the power source circuit is arranged on each of the first layer and the second layer of the circuit substrate connects the light emitting device of the first light source to the light emitting device of the second light source, and connects the light emitting device of the third light source to the light emitting device of the fourth light source.