Display device

Patent metadata

Field	Value
Publication number	US-2023215905-A1
Application number	US-202218063643-A
Country	US
Kind code	A1
Filing date	Dec 8, 2022
Priority date	Dec 30, 2021
Publication date	Jul 6, 2023
Grant date	—

Abstract

A display device according to an example embodiment of the present disclosure includes a first substrate including an active area including a plurality of pixels and a non-active area surrounding the active area; a plurality of LEDs disposed in the plurality of pixels on the first substrate; a planarization layer disposed to surround the plurality of LEDs; a bank disposed on the planarization layer and including a black material; a reflection-reducing layer disposed on the bank and having a reflectance varying according to temperature; and a heat dissipation layer disposed on the reflection-reducing layer.

First claim

1 . A display device, comprising:
a first substrate including an active area including a plurality of pixels and a non-active area adjacent the active area; a plurality of light-emitting diodes disposed in the plurality of pixels on the first substrate; a planarization layer disposed to surround the plurality of light-emitting diodes on at least four sides; a bank disposed on the planarization layer and including a black material; a reflection-reducing layer disposed on the bank and having a reflectance that varies according to temperature thereof; and a heat dissipation layer disposed on the reflection-reducing layer.

2 . The display device of claim 1 , wherein the reflectance of the reflection-reducing layer is lower at a driving temperature of the display device than at room temperature.

3 . The display device of claim 2 , wherein the reflection-reducing layer functions as a haze layer at the driving temperature of the display device.

4 . The display device of claim 2 , wherein the reflection-reducing layer includes a base resin and a polymer dispersed in the base resin and having a reflectance varying according to temperature.

5 . The display device of claim 4 , wherein the base resin includes one of polyimide resin, acryl resin, cardo resin, novolac resin, and siloxane resin.

6 . The display device of claim 4 , wherein the polymer includes poly(N-isopropylacrylamide) (PNIPAM).

7 . The display device of claim 1 , wherein the heat dissipation layer includes a vertically aligned carbon nanotube (CNT) layer and metal oxide particles doped in the carbon nanotube layer.

8 . The display device of claim 7 , wherein the heat dissipation layer further includes carbon black particles, a binder, and a photosensitizer.

9 . The display device of claim 8 , wherein the binder includes an alkali-developable binder or a silicon-based binder.

10 . The display device of claim 8 , wherein the photosensitizer includes an oxime-based compound or a benzophenone-based compound.

11 . The display device of claim 1 , wherein the planarization layer extends to the non-active area, and
the bank, the reflection-reducing layer, and the heat dissipation layer are sequentially stacked on the planarization layer in the non-active area.

12 . The display device of claim 1 , further comprising:
a signal line disposed on the first substrate; a second substrate disposed under the first substrate; a signal link line disposed under the second substrate; and a side line disposed on side surfaces of the first substrate and the second substrate to connect the signal line and the signal link line.

13 . The display device of claim 12 , wherein the side line is a line in which a conductive paste is cured.

14 . A display device, comprising:
a substrate; a plurality of pixels on the substrate; a plurality of light-emitting diodes disposed in the plurality of pixels; a planarization layer adjacent to the plurality of light-emitting diodes; a bank disposed on the planarization layer; a first layer disposed on the bank and having reflectance that is lower at a driving temperature of the display device than at room temperature; and a second layer disposed on the first layer, the second layer including a vertically aligned carbon nanotube layer doped with metal oxide particles.

15 . The display device of claim 14 , wherein the first layer has haze that is higher at the driving temperature than at the room temperature.

16 . The display device of claim 14 , wherein the metal oxide particles include black titanium oxide, black iron oxide or a combination thereof.

17 . The display device of claim 14 , wherein the bank has a plurality of openings that expose the plurality of light-emitting diodes, and the bank absorbs light in a range of about 380 nanometers to about 700 nanometers.

18 . A display device, comprising:
a substrate; a plurality of pixels on the substrate; a plurality of light-emitting diodes disposed in the plurality of pixels; a planarization layer adjacent to the plurality of light-emitting diodes; a bank disposed on the planarization layer, the bank absorbing light in a range of about 380 nanometers to about 700 nanometers; and a vertically aligned carbon nanotube layer disposed on the bank.

19 . The display device of claim 18 , wherein:
the substrate includes an active area and a non-active area adjacent the active area, the plurality of pixels being in the active area; and the carbon nanotube layer is on the bank in the active area and in the non-active area.

20 . The display device of claim 19 , further comprising:
a signal line disposed on the substrate; a second substrate disposed under the substrate; a signal link line disposed under the second substrate; an insulating layer adjacent sidewalls of the substrate and the second substrate; and a side line disposed on the sidewalls of the substrate and the second substrate to connect the signal line to the signal link line, the side line including a conductive paste that is between the insulating layer and the sidewalls of the substrate and the second substrate.

Assignees

• Lg Display Co Ltd

Inventors

• Sohn Aram
• Lee Daeheung
• Kim Juhyuk
• Kim Byonghoo
• Lee Sumin

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10H20/857

  Interconnections, e.g. lead-frames, bond wires or solder balls · CPC title

• H10H29/142 Primary

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

• H10H20/84 Primary

  Coatings, e.g. passivation layers or antireflective coatings · CPC title

• H10H20/8511

  characterised by their material, e.g. binder · CPC title