Light emitting display panel

Patent metadata

Field	Value
Publication number	US-12598842-B2
Application number	US-202217965153-A
Country	US
Kind code	B2
Filing date	Oct 13, 2022
Priority date	Dec 30, 2021
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A light emitting display panel includes: a pixel driving circuit layer on a substrate; a planarization layer on the pixel driving circuit layer, a plurality of anode electrodes on the planarization layer, the plurality of anode electrodes including a white anode electrode and a blue anode electrode; a white quantum layer under the white anode electrode, the white quantum layer including first quantum dots; and a blue quantum layer under the blue anode electrode, the blue quantum layer including second quantum dots.

First claim

What is claimed is:

1 . A light emitting display panel comprising:
a pixel driving circuit layer on a substrate; a planarization layer on the pixel driving circuit layer; a plurality of anode electrodes on the planarization layer, the plurality of anode electrodes including a white anode electrode and a blue anode electrode; a white quantum layer under the white anode electrode such that the white quantum layer is closer to the substrate than the white anode electrode, the white quantum layer including first quantum dots; and a blue quantum layer under the blue anode electrode such that the blue quantum layer is closer to the substrate than the blue anode electrode, the blue quantum layer including second quantum dots.

2 . The light emitting display panel of claim 1 , wherein the planarization layer comprises a black material that absorbs light.

3 . The light emitting display panel of claim 1 , wherein each of the first quantum dots and the second quantum dots comprise blue quantum dots that scatter blue light.

4 . The light emitting display panel of claim 1 , wherein a red pixel including a red anode electrode or a green pixel including a green anode electrode is between a white pixel including the white anode electrode and a blue pixel including the blue anode electrode.

5 . The light emitting display panel of claim 1 , wherein each of the white quantum layer and the blue quantum layer is on the planarization layer.

6 . The light emitting display panel of claim 5 , wherein the planarization layer includes a first groove that overlaps the white anode electrode and a second groove that overlaps the blue anode electrode, the white quantum layer in the first groove and the blue quantum layer in the second groove.

7 . The light emitting display panel of claim 6 , wherein a height of the white quantum layer is greater than a depth of the first groove, and a height of the blue quantum layer is greater than a depth of the second groove.

8 . The light emitting display panel of claim 7 , wherein an upper surface of the white quantum layer and an upper surface of the blue quantum layer are provided on a same plane.

9 . The light emitting display panel of claim 6 , wherein a depth of the first groove is equal to a depth of the second groove, a height of the white quantum layer is equal to the depth of the first groove, and a height of the blue quantum layer is equal to the depth of the second groove.

10 . The light emitting display panel of claim 6 , wherein a depth of the first groove is different from a depth of the second groove.

11 . The light emitting display panel of claim 10 , wherein a depth of the white quantum layer is different from a depth of the blue quantum layer.

12 . The light emitting display panel of claim 10 , wherein an upper surface of the white quantum layer and an upper surface of the blue quantum layer are on a same plane.

13 . The light emitting display panel of claim 6 , wherein a depth of the first groove is equal to a depth of the second groove, and a height of the white quantum layer is different from a height of the blue quantum layer.

14 . The light emitting display panel of claim 13 , wherein a portion of the white anode electrode is in the first groove, or a portion of the blue anode electrode is in the second groove.

15 . A light emitting display panel comprising:
a pixel driving circuit layer on a substrate; a planarization layer on the pixel driving circuit layer; a plurality of anode electrodes on the planarization layer, the plurality of anode electrodes including a blue anode electrode; and a blue quantum layer provided under the blue anode electrode such that the blue quantum layer is closer to the substrate than the blue anode electrode, the blue quantum layer including quantum dots, wherein the blue pixel including the blue quantum layer and the blue anode electrode is provided between a red pixel that outputs red light and a green pixel that outputs green light, and wherein the planarization layer comprises a groove that overlaps the blue anode electrode, the blue quantum layer is in the groove, and the blue quantum layer is covered by the blue anode electrode.

16 . The light emitting display panel of claim 15 , wherein the quantum dots comprise blue quantum dots that scatter blue light.

17 . The light emitting display panel of claim 15 , wherein the blue quantum layer is on the planarization layer.

18 . The light emitting display panel of claim 15 , wherein a height of the blue quantum layer is greater than a depth of the groove, a height of the blue quantum layer is equal to a depth of the groove, or the blue anode electrode is in the groove.

19 . A light emitting display panel comprising:
a pixel driving circuit layer on a substrate; a planarization layer on the pixel driving circuit layer, the planarization layer including black material that absorbs light; a plurality of anode electrodes on the planarization layer; a quantum layer under an anode electrode from the plurality of anode electrodes such that the quantum layer is closer to the substrate than the anode electrode, the quantum layer including quantum dots; and another quantum layer under another anode electrode from the plurality of anode electrodes such that the other quantum layer is closer to the substrate than the other anode electrode, the other quantum layer including quantum dots, wherein the anode electrode is included in a blue subpixel and the quantum dots include blue quantum dots that scatter blue light, and wherein the other anode electrode is included in a white subpixel and the quantum dots included in the other quantum layer include the blue quantum dots that scatter blue light.

20 . The light emitting display panel of claim 19 , wherein either a red subpixel or a green subpixel is between the white subpixel and the blue subpixel.

21 . The light emitting display panel of claim 19 , wherein the planarization layer includes a first groove that overlaps the anode electrode and a second groove that overlaps the other anode electrode, the quantum layer in the first groove and the other quantum layer is in the second groove.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Yongjae
• Kang Seogshin
• Oh Saehoon

Classifications

• H10H29/142

  Two-dimensional arrangements, e.g. asymmetric LED layout · CPC title

• H10H20/8312

  extending at least partially through the bodies · CPC title

• H10H20/8512 Primary

  Wavelength conversion materials · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/877

  comprising scattering means · CPC title