Light emitting display device

Patent metadata

Field	Value
Publication number	US-2024423054-A1
Application number	US-202418420678-A
Country	US
Kind code	A1
Filing date	Jan 23, 2024
Priority date	Jun 16, 2023
Publication date	Dec 19, 2024
Grant date	—

Abstract

A light emitting display device includes: a unit pixel group having at least two unit pixels, wherein a unit pixel includes first, second, and third light emitting layers respectively corresponding to three primary colors, the first light emitting layer includes two first light emitting layers in one unit pixel, a laser drilling position is formed in one part of the unit pixel group, the second and third light emitting layers adjacent to the laser drilling position are formed of second and third modified light emitting layers, respectively, including grooves, the second and third light emitting layers do not include grooves, areas of the second modified light emitting layer and the second normal light emitting layer are the same, and areas of the third modified light emitting layer and the third normal light emitting layer are the same.

First claim

What is claimed is:

1 . A light emitting display device, comprising:
a unit pixel group having at least two unit pixels, wherein a unit pixel from among the at least two unit pixels includes a first light emitting layer, a second light emitting layer, and a third light emitting layer corresponding to three primary colors, the first light emitting layer includes two first light emitting layers in one unit pixel, a laser drilling position is formed in one part of the unit pixel group, the second light emitting layer and the third light emitting layer adjacent to the laser drilling position are formed of a second modified light emitting layer and a third modified light emitting layer including grooves, the second light emitting layer and the third light emitting layer spaced apart from the laser drilling position are formed of a second normal light emitting layer and a third normal light emitting layer that do not include grooves, an area of the second modified light emitting layer and an area of the second normal light emitting layer are the same or have an area difference of less than 10%, and an area of the third modified light emitting layer and an area of the third normal light emitting layer are the same or have an area difference of less than 10%.

2 . The light emitting display device of claim 1 , wherein:
the groove of the second modified light emitting layer and the groove of the third modified light emitting layer are formed at a side of the laser drilling position of the second modified light emitting layer and the third modified light emitting layer, respectively.

3 . The light emitting display device of claim 2 , wherein:
the second modified light emitting layer extends at a side portion of the second normal light emitting layer, and the groove of the second modified light emitting layer contracts at a corner portion of the second normal light emitting layer, and the third modified light emitting layer is extended at a side portion of the third normal light emitting layer, and the groove of the third modified light emitting layer is reduced at a corner portion of the third normal light emitting layer.

4 . The light emitting display device of claim 3 , wherein:
a planar shape of the second normal light emitting layer and the third normal light emitting layer has a quadrangle shape, and corners are chamfered or rounded.

5 . The light emitting display device of claim 4 , wherein:
the first light emitting layer is formed of a first normal light emitting layer that does not include grooves, the first light emitting layer included in one of the unit pixels includes a first-1 light emitting layer and a first-2 light emitting layer, the first-1 light emitting layer and the first-2 light emitting layer each have a rectangular shape in a planar shape, and have chamfered or rounded corners, a direction in which the first-1 light emitting layer is elongated is different from a direction in which the first-2 light emitting layer is elongated.

6 . The light emitting display device of claim 5 , wherein:
a light emitting device including the first-1 light emitting layer and a light emitting device including the first-2 light emitting layer are electrically connected to the same pixel driving unit through a connection line, and are included in one of the unit pixels.

7 . The light emitting display device of claim 6 , wherein:
when all of the laser drilling positions are positioned in the one unit pixel, a portion of the connection line extends along a outer edge of the unit pixel.

8 . The light emitting display device of claim 4 , wherein:
the first light emitting layer adjacent to the laser drilling position is formed as a first modified light emitting layer including a groove, and the first light emitting layer positioned away from the laser drilling position is formed as a first normal light emitting layer without a groove, an area of the first modified light emitting layer and an area of the first normal light emitting layer are the same or have an area difference of less than 10%.

9 . The light emitting display device of claim 8 , wherein:
the first normal light emitting layer has a rectangular shape in a planar shape, and has chamfered or rounded corners, two first modified light emitting layers are included in one unit pixel, and the two first modified light emitting layers are elongated and have different directions.

10 . The light emitting display device of claim 4 , wherein:
the second modified light emitting layer additionally extends even at the corners of the second normal light emitting layer, and the third modified light emitting layer additionally extends even at a corner portion of the third normal light emitting layer.

11 . The light emitting display device of claim 1 , wherein:
the unit pixel group includes four unit pixels, and the laser drilling position is positioned over all of the four unit pixels.

12 . The light emitting display device of claim 11 , wherein:
a center of the laser drilling position is positioned in one of the four unit pixels.

13 . The light emitting display device of claim 11 , wherein:
a center of the laser drilling position is positioned at a point where the four unit pixels meet.

14 . The light emitting display device of claim 1 , wherein:
the unit pixel group includes four unit pixels, and the laser drilling position is positioned across two of the four unit pixels.

15 . The light emitting display device of claim 1 , wherein:
the unit pixel group includes four unit pixels, and the laser drilling position is positioned within one of the four unit pixels.

16 . The light emitting display device of claim 1 , wherein:
the laser drilling positions are different from each other in at least two different unit pixel groups.

17 . A light emitting display device, comprising:
a unit pixel group having at least two unit pixels, one unit pixel includes a first light emitting layer, a second light emitting layer, and a third light emitting layer corresponding to three primary colors, the first light emitting layer includes two first light emitting layers in one unit pixel, a laser drilling position is formed in one part of the unit pixel group, the first light emitting layer is formed of a first normal light emitting layer that does not include grooves, and the second light emitting layer and the third light emitting layer are formed of a second modified light emitting layer and a third modified light emitting layer including grooves.

18 . The light emitting display device of claim 17 , wherein:
the groove adjacent to the laser drilling position of the second modified light emitting layer and the third modified light emitting layer is formed on a side of the laser drilling position of the second modified light emitting layer and the third modified light emitting layer, respectively.

19 . The light emitting display device of claim 18 , wherein:
the second modified light emitting layer and the third modified light emitting layer spaced apart from the laser drilling position have grooves positioned on a side different from a side on which the grooves are positioned in the second and third modified light emitting layers adjacent to the laser drilling position, respectively.

20 . The light emitting display device of claim 19 , wherein:
the unit pixel group includes four unit pixels, the second modified light emitting layer and the third modified light emitting layer have a rectangul

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Sang Shin
• Kang Yeonju
• Kim Sanghoon
• Lee Seung Jin
• Lee Yuri
• Jang Minji

Classifications

• H10K59/80521

  characterised by their shape · CPC title

• H10K50/11

  characterised by the electroluminescent [EL] layers · CPC title

• H10K59/10

  OLED displays · CPC title

• H10K59/353 Primary

  characterised by the geometrical arrangement of the RGB subpixels · CPC title

• B23K26/382

  by boring · CPC title