Display device, display substrate and manufacturing method of display substrate

Patent metadata

Field	Value
Publication number	US-12310174-B2
Application number	US-202117362095-A
Country	US
Kind code	B2
Filing date	Jun 29, 2021
Priority date	Jun 10, 2019
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A display device, a display substrate, and a manufacturing method of the display substrate. The display substrate includes a display region. The display region includes a transparent display region, and the transparent display region includes a first base and a plurality of first sub-pixels on the first base. Each of the first sub-pixels includes: a first electrode; a first pixel-defining layer disposed on the first electrode, the first-pixel defining layer being provided with an opening; a first light-emitting material layer disposed in the opening of the pixel-defining layer; and a second electrode disposed on the first light-emitting material layer. Further, a plurality of isolation pillars are provided on the first pixel-defining layer and configured to separate the second electrodes of adjacent first sub-pixels, the isolation pillar is T-shaped, and the isolation pillar is an integrally formed structure.

First claim

The invention claimed is:

1. A display substrate, comprising a display region, the display region comprising a transparent display region, and the transparent display region comprising:
a first base which is a light-transmitting base; and
a plurality of first sub-pixels disposed on the first base, each of the plurality of first sub-pixels comprising:
a first electrode;
a first pixel-defining layer disposed on the first electrode, and the first pixel-defining layer being provided with an opening;
a first light-emitting material layer disposed in the opening of the first pixel-defining layer; and
a second electrode disposed on the first light-emitting material layer;

wherein a plurality of isolation pillars are provided on the first pixel-defining layer and the plurality of isolation pillars are configured to separate the second electrodes of adjacent first sub-pixels, and each isolation pillar in the plurality of isolation pillars is T-shaped, and each isolation pillar in the plurality of isolation pillars is an integrally formed structure, wherein a first optical path compensation layer is provided on the first pixel defining layer,
wherein a second optical path compensation layer is provided on the first pixel-defining layer,
wherein each of the first optical path compensation layer and the second optical path compensation layer is formed from at least one of silicon dioxide and silicon nitride, and
wherein each of the first optical path compensation layer and the second optical path compensation layer is disposed in a layer that is above the first electrode and below the second electrode.

2. The display substrate according to claim 1 , wherein the first sub-pixels are driven by passive matrix (PM) driving mode,
the plurality of first electrodes are arranged in one row with a plurality of columns, and the plurality of isolation pillars are arranged in one row with a plurality of columns; or
the plurality of first electrodes are arranged in one column with a plurality of rows, and the plurality of isolation pillars are arranged in one column with a plurality of rows.

3. The display substrate according to claim 1 , wherein
each isolation pillar in the plurality of isolation pillars comprises a partition portion and a support portion disposed on the first pixel-defining layer and configured to support the partition portion, and the partition portion comprises at least one partition end, and the minimum distance between the partition end and the support portion is greater than 1 μm, and/or a height of the support portion is greater than 550 nm.

4. The display substrate according to claim 3 , wherein a longitudinal section of the support portion is rectangular, regular trapezoid or inverted trapezoid.

5. The display substrate according to claim 1 , wherein the isolation pillar is made of an inorganic transparent material or an organic transparent material.

6. The display substrate according to claim 1 ,
wherein the isolation pillar comprises a partition portion and a support portion provided on the first pixel-defining layer and configured to support the partition portion, and
wherein the first optical path compensation layer is disposed below the partition portion, and an orthographic projection of the first optical path compensation layer on the first pixel-defining layer does not overlap with an orthographic projection of the isolation pillar on the first pixel-defining layer; and the first optical path compensation layer is configured to make an optical path difference ΔL 1 between a first vertical incident path passing through the first optical path compensation layer and a second vertical incident path passing through the first light-emitting material layer satisfy: (m−δ 1 )λ≤|ΔL 1 |≤(m+δ 1 )λ, where λ is a wavelength of visible light, m is a natural number; and δ 1 is a constant between 0 and 0.2; and/or
wherein the second optical path compensation layer is disposed below the partition portion, and an orthographic projection of the second optical path compensation layer on the first pixel-defining layer is within an orthographic projection of the partition portion on the first pixel-defining layer; and the second optical path compensation layer is configured to make an optical path difference ΔL 2 between a third vertical incidence path passing through the second optical path compensation layer and the second vertical incidence path passing through the first light-emitting material layer satisfy: (n−δ 2 )λ≤|ΔL 2 |≤(n+δ 2 )λ, where λ is a wavelength of visible light, n is a natural number; and δ 2 is a constant between 0 and 0.2.

7. The display substrate according to claim 6 , wherein
when the first optical path compensation layer and the second optical path compensation layer are provided on the first pixel-defining layer,
a refractive index of a material of the first optical path compensation layer is greater than a refractive index of a material of the second optical path compensation layer; or
the first optical path compensation layer and the second optical path compensation layer are made of a same material, and a thickness of the first optical path compensation layer is greater than a thickness of the second optical path compensation layer.

8. The display substrate according to claim 1 , wherein the display region further comprises a non-transparent display region at least partially surrounding the transparent display region, the non-transparent display region comprising:
a second base; and
a plurality of second sub-pixels disposed on the second base, each of the plurality of second sub-pixels comprising:
a third electrode;
a second pixel-defining layer disposed on the third electrode;
a second light-emitting material layer disposed in an opening of the second pixel-defining layer; and
a fourth electrode disposed on the second light-emitting material layer.

9. The display substrate according to claim 8 , wherein the second sub-pixels are driven by active matrix (AM) driving mode, and the third electrodes of the plurality of second sub-pixels are block structures; and/or the fourth electrodes of the plurality of second sub-pixels are a planar electrode.

10. The display substrate according to claim 8 , wherein an isolation belt is provided in a part of the transparent display region close to the non-transparent display region and configured to separate the second electrodes and the fourth electrodes; and a longitudinal section of the isolation belt is T-shaped, and the isolation belt is an integrally formed structure.

11. The display substrate according to claim 10 , wherein the isolation belt comprises a plurality of isolation pillars connected together.

12. The display substrate according to claim 8 , wherein
the non-transparent display region completely surrounds the transparent display region, and the isolation belt is a closed loop; or
the non-transparent display region partially surrounds the transparent display region, and the isolation belt is a non-closed loop.

13. The display substrate according to claim 11 , wherein a size of the longitudinal section of the isolation belt along a direction perpendicular to an extending direction thereof is the same as a size of the longitudinal section of each of the plurality of isolation pillars.

14. A display device, comprising:
a device body with a component region; and
a display panel covering the device body; the display panel comprising a display substrate according to claim 1 ,
wherein the component region is disposed below a transparent display region of the display panel, and a photosensitive component that emits or collects light throug

Assignees

• Kunshan Govisionox Optoelectronics Co Ltd

Inventors

• Liang Chao
• Wu Hao
• Chi Shuaijie
• Tang Jingsong
• Lou Junhui
• Tao Guosheng
• Fan Jun

Classifications

• H10K59/80521

  characterised by their shape · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/353

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

• H10K59/60

  OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes · CPC title