Display apparatus, structure and manufacturing apparatus of flexible display apparatus

Patent metadata

Field	Value
Publication number	US-12295244-B2
Application number	US-202217706148-A
Country	US
Kind code	B2
Filing date	Mar 28, 2022
Priority date	Dec 21, 2018
Publication date	May 6, 2025
Grant date	May 6, 2025

Abstract

A manufacturing apparatus is configured to bond a display panel to a cover window having a flat portion between a first curvature portion and a second curvature portion. The manufacturing apparatus comprises a first attachment portion configured to press a first adhesive surface of the display panel to the flat portion of the cover window, and a 3D attachment portion configured to press a first edge adhesive surface and a second edge adhesive surface of the display panel to the first curvature portion and the second curvature portion of the window, respectively, and not press the first adhesive surface of the display panel.

First claim

What is claimed is:

1. A display apparatus comprising:
a flexible display panel, wherein the flexible display panel comprises:
a cover window having a curved portion;
a flexible substrate including a first display portion including a flat display portion, and a second display portion including a first bending display portion and a second bending display portion,
a pixel array portion including a plurality of pixels having a driving thin film transistor including a gate electrode, a gate insulating film, a semiconductor layer, a source electrode, a drain electrode, an anode electrode electrically connected to the driving thin film transistor, a light emitting diode layer on the anode electrode, and a cathode electrode electrically connected to the light emitting diode layer;
an encapsulation portion disposed on the flexible substrate, the encapsulation portion surrounding the pixel array portion;
a touch electrode portion disposed on the encapsulation portion, the touch electrode portion configured as a touch sensor;
a functional film including a circular polarizer configured to block reflected light traveling toward the cover window;
a back plate configured to maintain a rear surface of the flexible substrate overlapping the pixel array portion in a flat state;
a heat dissipating sheet portion attached to an entirety of a rear surface of the back plate, the heat dissipating sheet portion including a metal layer;
a middle frame supporting the cover window and disposed on a side of the display apparatus; and
a back cover covering a rear surface of the middle frame,
wherein the touch electrode portion includes a touch electrode layer arranged on the encapsulation portion, and a dielectric layer covering the touch electrode layer.

2. The display apparatus of claim 1 , wherein the semiconductor layer includes a silicon such as amorphous silicon, polycrystalline silicon, or low temperature polycrystalline silicon, or include an oxide such as Indium-Gallium-Zinc-Oxide.

3. The display apparatus of claim 1 , wherein the light emitting diode layer includes an organic light emitting diode,
wherein the organic light emitting diode emits light of a same color per pixel, or emits light of a color different per pixel.

4. The display apparatus of claim 1 , wherein the light emitting diode layer includes a micro light emitting diode element electrically connected with each of the anode electrode and the cathode electrode,
wherein the micro light emitting diode element includes a first terminal electrically connected with the anode electrode and a second terminal electrically connected with the cathode electrode.

5. The display apparatus of claim 1 , wherein the encapsulation portion comprises a multi-layered structure in which an organic material layer and an inorganic material layer are alternately disposed.

6. A display apparatus comprising:
a flexible display panel, wherein the flexible display panel comprises:
a cover window having a curved portion;
a flexible substrate including a first display portion including a flat display portion, and a second display portion including a first bending display portion and a second bending display portion,
a pixel array portion including a plurality of pixels having a driving thin film transistor including a gate electrode, a gate insulating film, a semiconductor layer, a source electrode, a drain electrode, an anode electrode electrically connected to the driving thin film transistor, a light emitting diode layer on the anode electrode, and a cathode electrode electrically connected to the light emitting diode layer;
an encapsulation portion disposed on the flexible substrate, the encapsulation portion surrounding the pixel array portion;
a touch electrode portion disposed on the encapsulation portion, the touch electrode portion configured as a touch sensor;
a functional film including a circular polarizer configured to block reflected light traveling toward the cover window;
a back plate configured to maintain a rear surface of the flexible substrate overlapping the pixel array portion in a flat state;
a heat dissipating sheet portion attached to an entirety of a rear surface of the back plate, the heat dissipating sheet portion including a metal layer;
a middle frame supporting the cover window and disposed on a side of the display apparatus; and
a back cover covering a rear surface of the middle frame,
wherein the touch electrode portion is disposed on a touch buffer layer covering the encapsulation portion.

7. The display apparatus of claim 1 , wherein the touch electrode layer includes a plurality of touch driving electrodes arranged on the encapsulation portion overlapped with the pixel array portion at constant intervals, and a plurality of touch sensing electrodes electrically insulated from the plurality of touch driving electrodes,
wherein the plurality of touch sensing electrodes are arranged on a same layer as the plurality of touch driving electrodes, or the plurality of touch sensing electrodes and the plurality of touch driving electrodes are arranged on their respective layers different from each other by interposing the dielectric layer therebetween.

8. The display apparatus of claim 1 , wherein the back plate is polyethyleneterephthalate.

9. The display apparatus of claim 1 , wherein the heat dissipating sheet portion includes a heat dissipating sheet,
wherein the heat dissipating sheet includes a metal layer comprising copper.

10. The display apparatus of claim 9 , wherein the heat dissipating sheet includes a graphite layer coated on the metal layer.

11. The display apparatus of claim 9 , wherein the heat dissipating sheet has a heat dissipation function, a ground function, and a function of protecting a rear surface of the flexible display panel.

12. The display apparatus of claim 1 , wherein the heat dissipating sheet portion further includes a cushion member configured to attenuate impact.

13. The display apparatus of claim 12 , wherein the heat dissipating sheet portion includes a heat dissipating sheet,
wherein the cushion member includes a foam tape coupled to the heat dissipating sheet.

14. The display apparatus of claim 12 , wherein the heat dissipating sheet portion further includes an adhesive member coupled to the cushion member.

15. The display apparatus of claim 14 , wherein the adhesive member includes an uneven structure disposed on a surface.

16. The display apparatus of claim 1 , wherein the middle frame includes a plastic material or a metal material.

17. The display apparatus of claim 1 , wherein the middle frame includes a metal material having a color coating layer.

18. The display apparatus of claim 1 , wherein the middle frame comprises a metal material which has heat conductivity to improve heat dissipation performance.

19. The display apparatus of claim 1 , wherein the middle frame includes a middle sidewall that supports a curved window of the cover window,
wherein the back cover detachably is coupled to the middle sidewall for battery exchange according to battery discharge.

20. The display apparatus of claim 1 , wherein the back cover includes at least one of a plastic material, a metal material, or a glass material.

21. The display apparatus of claim 1 , wherein the back cover is a flat glass having a transparent, semi-transparent, or opaque color coating layer.

22. The display apparatus of claim 1 , wherein the back cover has a symmetrical structure with the co

Assignees

• Lg Display Co Ltd

Inventors

• Kuon Ikhyun
• Kim Yongsoo
• Han Sangeun
• Byun Sungnam
• Park Jeongkweon
• Lee Sanggul
• Pyo Changmin
• Seo Doowon
• Kang Bogyung
• Park Sungwook
• Lee Juyeob
• Ha YongMin
• Shin Soonbum
• Kim Moongoo
• Park Chan
• Lee Yunmi

Classifications

• H10K50/8426

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K71/00 Primary

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

• H10K59/8794

  Arrangements for heating and cooling · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/873

  Encapsulations · CPC title