FLEXIBLE DISPLAY APPARATUS AND ELECTRONIC DEVICE COMPRISING THE SAME

• US 20200136069A1
• Filed: 10/17/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: PAEK, SeungHan, Park, Seongwoo, Lee, Saemleenuri
• Granted Patent: US 11,696,489 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 15/046 of foam
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 17/06 comprising glass as the main or only constituent of a layer, next to another layer of a specific material
• CPC Class Codes: B32B 2255/06 on metal layer
• CPC Class Codes: B32B 2255/20 Inorganic coating
• CPC Class Codes: B32B 2255/24 Organic non-macromolecular coating
• CPC Class Codes: B32B 2255/26 Polymeric coating
• CPC Class Codes: B32B 2255/28 Multiple coating on one surface
• CPC Class Codes: B32B 2307/204 Di-electric
• CPC Class Codes: B32B 2307/302 Conductive
• CPC Class Codes: B32B 2307/402 Coloured
• CPC Class Codes: B32B 2307/41 Opaque
• CPC Class Codes: B32B 2307/418 Refractive
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 2307/51 Elastic
• CPC Class Codes: B32B 2307/546 Flexural strength; Flexion stiffness
• CPC Class Codes: B32B 2307/558 Impact strength, toughness
• CPC Class Codes: B32B 2307/706 Anisotropic
• CPC Class Codes: B32B 2307/7244 Oxygen barrier
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 2307/732 : Dimensional properties
• CPC Class Codes: B32B 2315/08 : Glass
• CPC Class Codes: B32B 2457/20 : Displays, e.g. liquid crystal displays, plasma displays
• CPC Class Codes: B32B 27/06 : as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a layer of a particular substance B32B9/045; next to a bituminous or tarry layer B32B11/046; next to a water setting substance layer B32B13/12; next to a metal layer B32B15/08; next to a glass layer B32B17/10; next to a layer formed of natural mineral fibres or particles B32B19/045; next to a wood layer B32B21/08; next to a cellulosic plastic layer B32B23/08; next to a natural or synthetic rubber layer B32B25/08
• CPC Class Codes: B32B 27/281 : comprising polyimides
• CPC Class Codes: B32B 27/285 : comprising polyethers
• CPC Class Codes: B32B 27/286 : comprising polysulphones; polysulfides
• CPC Class Codes: B32B 27/325 : comprising polycycloolefins
• CPC Class Codes: B32B 27/36 : comprising polyesters
• CPC Class Codes: B32B 27/365 : comprising polycarbonates
• CPC Class Codes: B32B 3/02 : characterised by features of form at particular places, e.g. in edge regions non-uniform thickness B32B3/263
• CPC Class Codes: B32B 3/08 : characterised by added members at particular parts layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18
• CPC Class Codes: B32B 3/28 : characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: B32B 3/30 : characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs apertured layer B32B3/266; layer with cavities or internal voids B32B3/26
• CPC Class Codes: B32B 5/18 : characterised by features of a layer of foamed material
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: C03C 15/00 : Surface treatment of glass, not in the form of fibres or filaments, by etching etching or surface-brightening compositions, in general C09K13/00
• CPC Class Codes: C03C 2218/34 : Masking
• CPC Class Codes: H10K 2102/311 : Flexible OLED
• CPC Class Codes: H10K 50/841 : Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/87 : Arrangements for heating or cooling
• CPC Class Codes: H10K 59/12 : Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/871 : Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/8794 : Arrangements for heating and cooling
• CPC Class Codes: H10K 77/111 : Flexible substrates
• CPC Class Codes: Y02E 10/549 : Organic PV cells

Abstract

A flexible display apparatus comprises a glass substrate including a flat surface and a glass etching surface that is curved, and a flexible display panel including a bending portion on the glass etching surface.

Claims

1. A flexible display apparatus, comprising:

a glass substrate including a flat surface and a glass etching surface that is curved; and

a flexible display panel including a bending portion on the glass etching surface.

2. The flexible display apparatus of claim 1, wherein the flexible display panel further includes:

a flexible substrate having a plane support portion directly on the flat surface of the glass substrate and a bending support portion bent from the plane support portion in a curved shape and on the glass etching surface of the glass substrate; and

a pixel array portion having a plane display portion on the plane support portion and a bending display portion on the bending support portion,

wherein the bending portion includes the bending support portion and the bending display portion.

3. The flexible display apparatus of claim 1, wherein the glass substrate further includes:

a first panel support portion having a first glass etching surface on a first edge portion of the glass substrate parallel with a first direction; and

a second panel support portion having a second glass etching surface on a second edge portion of the glass substrate parallel with the first edge portion.

4. The flexible display apparatus of claim 3, wherein the flexible display panel further includes:

a flexible substrate having a plane support portion directly on the flat surface of the glass substrate, a first bending support portion on the first panel support portion, and a second bending support portion on the second panel support portion; and

a pixel array portion having a plane display portion on the plane support portion, a first bending display portion on the first bending support portion, and a second bending display portion on the second bending support portion.

5. The flexible display apparatus of claim 4, further comprising:

a filling member covering each of the first panel support portion and the second panel support portion,

wherein the filling member is bent together with each of the first bending display portion and the second bending display portion.

6. The flexible display apparatus of claim 1, wherein the flexible display panel further includes:

a pixel array portion on the flat surface of the glass substrate;

a display pad portion connected to the pixel array portion; and

a link line portion between the pixel array portion and the display pad portion,

wherein the bending portion includes the link line portion.

7. The flexible display apparatus of claim 6, wherein the glass substrate further includes a panel support portion having the glass etching surface formed on a third edge portion overlapped with the link line portion.

8. The flexible display apparatus of claim 1, wherein the flexible display panel further includes:

a flexible substrate having a plane support portion directly on the flat surface of the glass substrate and a bending support portion bent from the plane support portion in a curved shape and on the glass etching surface;

a pixel array portion having a display portion on the plane support portion;

a display pad portion connected to the pixel array portion and on the bending support portion; and

a link line portion connected between the pixel array portion and the display pad portion and on the bending support portion,

wherein the bending portion includes the link line portion.

9. The flexible display apparatus of claim 8, further comprising:

an auxiliary glass substrate including an auxiliary flat surface on a third edge portion of the flexible display panel and having the display pad portion and an auxiliary glass etching surface,

wherein the link line portion is on the glass etching surface of the glass substrate and the auxiliary glass etching surface of the auxiliary glass substrate in a curved shape.

10. The flexible display apparatus of claim 9, wherein a rear surface of the auxiliary glass substrate overlaps a rear edge portion of the glass substrate.

11. The flexible display apparatus of claim 1, wherein the glass substrate further includes:

a first panel support portion having the glass etching surface on a first edge portion parallel with a first direction;

a second panel support portion having the glass etching surface on a second edge portion parallel with the first edge portion; and

a third panel support portion having the glass etching surface on a third edge portion parallel with a second direction crossing the first direction.

12. The flexible display apparatus of claim 11, wherein the flexible display panel further includes:

a plane display portion on the flat surface of the glass substrate;

a first bending display portion on the first panel support portion in a curved shape;

a second bending display portion on the second panel support portion in a curved shape; and

a link line portion on the third panel support portion in a curved shape,

wherein the bending portion includes the first bending display portion, the second bending display portion, and the link line portion.

13. The flexible display apparatus of claim 12, further comprising:

a filling member covering each of the first panel support portion and the second panel support portion,

wherein the filling member is bent together with the first bending display portion and the second bending display portion.

14. The flexible display apparatus of claim 11, further comprising:

an auxiliary glass substrate having an auxiliary flat surface and an auxiliary glass etching surface,

wherein the flexible display panel further includes;

a plane display portion on the flat surface of the glass substrate;

a first bending display portion on the first panel support portion in a curved shape;

a second bending display portion on the second panel support portion in a curved shape; and

a link line portion on the third panel support portion and the auxiliary glass etching surface of the auxiliary glass substrate in a curved shape,

wherein the bending portion includes the first bending display portion, the second bending display portion, and the link line portion.

15. The flexible display apparatus of claim 14, further comprising:

a filling member covering each of the first panel support portion and the second panel support portion,

wherein the filling member is bent together with each of the first bending display portion and the second bending display portion.

16. The flexible display apparatus of claim 14, wherein the flexible display panel further includes:

a display pad portion connected with the link line portion,

wherein the auxiliary flat surface of the auxiliary glass substrate is coupled with a rear surface of the flexible display panel including the display pad portion; and

wherein a rear surface of the auxiliary glass substrate is overlapped with a rear edge portion of the glass substrate.

17. The flexible display apparatus of claim 1, wherein the glass etching surface has an inverse tapered shape including an undercut, the undercut being adjacent to a rear surface of the flexible display panel.

18. The flexible display apparatus of claim 1, wherein the curved shape of the glass etching surface is tapered.

19. The flexible display apparatus of claim 1, further comprising a radiation member attached to a rear surface of the glass substrate.

20. The flexible display apparatus of claim 5, further comprising a radiation member attached to a rear surface of the glass substrate and a rear surface of the filling member.

21. An electronic device, comprising:

a cover window; and

a display module coupled to the cover window,

wherein the display module includes the flexible display apparatus of claim 1.

22. The electronic device of claim 21, wherein the glass etching surface has an inverse tapered shape including an undercut, the undercut being adjacent to a rear surface of the flexible display panel.

23. The electronic device of claim 21, wherein the curved shape of the glass etching surface is tapered.

24. The electronic device of claim 21, wherein the flexible display apparatus further comprises a radiation member attached to a rear surface of the glass substrate.

25. The electronic device of claim 21, wherein the cover window includes:

a front window having a plane shape; and

a bending window bent from the front window in a curved shape, and surrounding at least one side of the display module.

26. An electronic device, comprising:

a cover window having a front window and a bending window bent from the front window in a curved shape;

a display module coupled to the cover window; and

a housing that stores the display module and supports the cover window,

wherein the display module includes;

a flexible display panel including a display portion having a plane display portion coupled with the front window and a bending display portion coupled with the bending window;

a glass substrate having a flat surface supporting the plane display portion and a glass etching surface supporting the bending display portion; and

a filling member supporting the bending display portion and covering the glass etching surface,

wherein the glass etching surface has a non-flat structure in which the flat surface is partially removed.

27. The electronic device of claim 26, wherein the glass etching surface has an inverse tapered shape including an undercut, the undercut being adjacent to a rear surface of the flexible display panel.

28. The electronic device of claim 26, further comprising:

a radiation member on a rear surface of the glass substrate and a rear surface of the filling member,

wherein the bending display portion, the filling member, and an edge portion of the radiation member on the rear surface of the filling member are respectively bent along the curved shape of the bending window.