Organic light emitting diode display device

• US 9,929,221 B2
• Filed: 06/30/2016
• Issued: 03/27/2018
• Est. Priority Date: 06/30/2015
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Kim, Kang-Hyun, Yang, Ki-Soub, Choi, Seung-Ryul, Park, Kyoung-Jin
• Primary Examiner(s): Tran, Dzung
• Application Number:
  US15/198,808
• Publication Number:
  US 20170005151A1
• Time in Patent Office: 635 Days
• Field of Search: 257 40, 313504, 313498, 349143, 430 5, 430322
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels

Abstract

An organic light emitting diode display device (100) including: a plurality of pixels (101, 102, 103) each including first (101a, 102a, 103a), second (101b, 102b, 103b) and third sub-pixels (101c, 102c, 103c), wherein the first sub-pixels (101a, 102a, 103a) of adjacent pixels (101, 102, 103), the second sub-pixels (101b, 102b, 103b) of adjacent pixels (101, 102, 103) and the third sub-pixels (101c, 102c, 103c) of adjacent pixels (101, 102, 103) constitute a plurality of sub-pixel groups (150); a first bank layer (171) dividing the plurality of sub-pixel groups (150) and dividing the first (101a, 102a, 103a), second (101b, 102b, 103b) and third sub-pixels (101c, 102c, 103c); and a second bank layer (173) on the first bank layer (171), the second bank layer (173) dividing the first (101a, 102a, 103a), second (101b, 102b, 103b) and third sub-pixels (101c, 102c, 103c).

Claims

1. An organic light emitting diode display device, comprising:

a plurality of pixels each including first, second and third sub-pixels, wherein the first sub-pixels of adjacent pixels, the second sub-pixels of adjacent pixels and the third sub-pixels of adjacent pixels constitute a plurality of sub-pixel groups;

a first bank layer dividing the plurality of sub-pixel groups and dividing the first, second and third sub-pixels, the first bank layer having a plurality of first openings corresponding to the first, second and third sub-pixels of each of the plurality of sub-pixel group; and

a second bank layer on the first bank layer, the second bank layer dividing the first, second and third sub-pixels within each pixel of the plurality of pixels, the second bank layer having a plurality of second openings corresponding to the plurality of sub-pixel group.

2. The display device of claim 1, wherein the second bank layer further divides the sub-pixel groups from each other.

3. The display device of claim 1, wherein each of the first sub-pixels of one of the plurality of sub-pixel groups displays a first color, each of the second sub-pixels of one of the plurality of sub-pixel groups displays a second color, and each of the third sub-pixels of one of the plurality of sub-pixel groups displays a third color.

4. The display device of claim 1, wherein each of the plurality of pixels has a hexagonal shape, and at least one of the first, second and third sub-pixels is disposed at a vertex of the hexagonal shape.

5. The display device of claim 4, wherein the plurality of pixels has a honeycomb shape.

6. The display device of claim 5, wherein the first, second and third sub-pixels are disposed at separated three vertexes of the hexagonal shape, respectively, and each of the plurality of sub-pixel groups includes three of the first sub-pixels, three of the second sub-pixels or three of the third sub-pixels.

7. The display device of claim 6, wherein each of the plurality of sub-pixel groups has one of a circular shape and a polygonal shape, and the first bank layer divides the first sub-pixels, the second sub-pixels or the third sub-pixels of each of the plurality of sub-pixel groups with respect to a center of the circular shape.

8. The display device of claim 6, wherein the first sub-pixels, the second sub-pixels or the third sub-pixels of each of the plurality of sub-pixel groups have a same area as each other.

9. The display device of claim 8, wherein the first, second and third sub-pixels display red, green and blue colors, respectively.

10. The display device of claim 4, wherein the second bank layer exposes edge portions of the first bank layer.

11. The display device of claim 10, wherein the first bank layer includes a hydrophilic material and the second bank layer includes a hydrophobic material.

12. The display device of claim 4, further comprising a gate line and a data line crossing each other,

wherein at least one of the first, second and third sub-pixels is connected to the gate line and the data line, and

wherein the gate line and the data line are disposed along sides of each of the plurality of pixels to have a zigzag shape.

13. The display device of claim 12, wherein the gate line is bent with an angle of 120°

to have the zigzag shape including a straight line and a triangular protrusion, and

wherein the data line is bent with an angle of 120°

to have the zigzag shape including a straight line and a trapezoidal protrusion.

14. The display device of claim 4, further comprising first, second and third emitting layers on the first bank layer in the first, second and third sub-pixels, respectively,

wherein the first emitting layers, the second emitting layers or the third emitting layers of each of the plurality of sub-pixel groups are connected to each other, and

wherein preferably the first, second and third emitting layers are formed through a soluble process including an inkjet printing method and a nozzle printing method.

15. The display device of claim 1, wherein at least some of the pixels are respectively connected to exactly two gate lines and to exactly two data lines.