Electronic device comprising adhesive member

Patent metadata

Field	Value
Publication number	US-11455818-B2
Application number	US-201916563145-A
Country	US
Kind code	B2
Filing date	Sep 6, 2019
Priority date	Nov 16, 2018
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

An electronic device includes: a display module; a first adhesive member having a multi-layered structure and having a first adhesive surface attached on a back surface of the display module; and a sensing module including a sensing area, the sensing area being attached on a second adhesive surface facing the first adhesive surface of the first adhesive member.

First claim

What is claimed is:

1. An electronic device comprising:
a display module;
a first adhesive member having a multi-layered structure and having a first adhesive surface attached on a back surface of the display module;
a sensing module comprising a sensing area, the sensing area being attached on a second adhesive surface facing the first adhesive surface of the first adhesive member; and
a second adhesive member,
wherein the first adhesive member comprises:
a base layer having a size corresponding to the sensing area and comprising a polymer material;
a first adhesive layer having a size corresponding to the sensing area and being disposed between the base layer and the display module; and
a second adhesive layer between the base layer and the sensing module, and
wherein the second adhesive member is attached to a side surface of the sensing module, a side surface of the base layer, a side surface of the first adhesive layer, a side surface of the second adhesive layer, and the back surface of the display module,
wherein the base layer has a modulus in a range of about 150 MPa to about 10 GPa.

2. The electronic device of claim 1 , wherein each of the first adhesive layer and the second adhesive layer comprises any one selected from an adhesive resin, a pressure sensitive adhesive film, and an optical transparent adhesive film.

3. The electronic device of claim 2 , wherein each of the first adhesive layer and the second adhesive layer has an adhesive force of 300 gf/in or greater.

4. The electronic device of claim 1 , wherein the base layer comprises a polyester material or a polyimide material.

5. The electronic device of claim 1 , wherein the first adhesive member has a thickness in a range of about 5 μm to about 200 μm.

6. The electronic device of claim 1 , wherein the second adhesive member comprises a photoinitiator.

7. The electronic device of claim 6 , wherein the photoinitiator is configured to be activated by ultraviolet light.

8. The electronic device of claim 6 , wherein the photoinitiator comprises any one selected from 2,2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-propanone, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methylpropan-1-one, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1, 2-dimethylamino-2-(4-methyl-benzyl)-1-(4-morpholin-4-yl-phenyl)-butan-1-one, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2,4,6-trimethylbenzoyl-diphenyl phosphinate, bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide), [1-(4-phenylsulfanylbenzoyl)heptylideneamino]benzoate, [1-[9-ethyl-6-(2-methylbenzoyl)carbazol-3-yl]ethylideneamino] acetate, and Bis(2,4-cyclopentadienyl)bis[2,6-difluoro-3-(1-pyrryl)phenyl] titanium(IV).

9. The electronic device of claim 1 , wherein:
the sensing module and the back surface of the display module are spaced apart from each other at a set interval, and
a space between the sensing module and the back surface of the display module that are spaced apart from each other is at least partially filled with the first adhesive member.

10. The electronic device of claim 9 , wherein the sensing module comprises a fingerprint sensing sensor configured to utilize an ultrasonic wave.

11. The electronic device of claim 1 , wherein:
the display module is divided into a display area configured to display an image, and a peripheral area adjacent to the display area on a plane, and
the sensing module overlaps the display area on the plane.

12. The electronic device of claim 1 , further comprising a circuit substrate electrically coupled to the display module and below the back surface of the display module,
wherein the circuit substrate has an opening overlapping the sensing module, and
wherein the first adhesive member is attached to the back surface of the display panel exposed by the opening.

13. The electronic device of claim 1 , wherein the display module comprises:
a display panel comprising a plurality of pixels configured to display an image; and
a cover panel on a back surface of the display panel and having an opening.

14. The electronic device of claim 13 , wherein the first adhesive member is attached to the back surface of the display panel exposed by the opening.

15. The electronic device of claim 13 , wherein the display panel comprises:
a planar portion, and a protrusion portion that protrudes from the planar portion and is bent relative to the planar portion, and
a portion of the cover panel is between the planar portion and the protrusion portion.

16. The electronic device of claim 13 , wherein the display panel comprises:
a base substrate;
a display element layer on the base substrate;
an encapsulation layer on the display element layer; and
an input sensing unit on the encapsulation layer.

17. An electronic device comprising:
a display module comprising a front surface having a display area and a peripheral area adjacent to the display area, and a back surface facing the front surface;
a first adhesive member comprising a base layer having a size corresponding to the sensing area and comprising a polymer material, a first adhesive layer on a first surface of the base layer and attached to the back surface of the display module, and a second adhesive layer on a second surface facing the first surface of the base layer;
a sensing module comprising a sensing area that overlaps the display area and is configured to ultrasonically sense a fingerprint, wherein the second adhesive layer of the first adhesive member is attached to the sensing area; and
a second adhesive member comprising a photoinitiator, the second adhesive member being attached to a portion of the sensing module and the back surface of the display module,
wherein the base layer has a modulus in a range of about 150 MPa to about 10 GPa.

18. The electronic device of claim 17 , wherein:
the sensing module and the back surface of the display module are spaced apart from each other at a set interval, and
a space between the sensing module and the back surface of the display module that are spaced apart from each other is at least partially filled with the first adhesive member.

19. The electronic device of claim 17 , wherein the photoinitiator comprises any one selected from 2,2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenyl-ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methyl-1-propanone, 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methylpropan-1-one, 2-methyl-1 [4-(methylthio)phenyl]-2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)-butanone-1, 2-dimethylamino-2-(4-methyl-benzyl)-1-(4-morpholin-4-yl-phenyl)-butan-1-one, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 2,4,6-trimethylbenzoyl-diphenyl phosphinate, bis(2,4,6-trimethylbenzoyl)-phenylphosphineoxide), [1-(4-phenylsulfanylbenzoyl)heptylideneamino]benzoate, [1-[9-ethyl-6-(2-methylbenzoyl)carbazol-3-yl]ethylideneamino] acetate, and Bis(2,4-cyclopentadienyl)bis[2,6-difluoro-3-(1-pyrryl)phenyl] titanium(IV).

Assignees

• Samsung Display Co Ltd

Inventors

• Cho Yewon
• Lee Dongeun
• Jeong Dongjin

Classifications

• G06F1/1658

  related to the mounting of internal components, e.g. disc drive or any other functional module · CPC title

• G06F1/1643

  the display being associated to a digitizer, e.g. laptops that can be used as penpads (details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615) · CPC title

• G06V40/1306 Primary

  non-optical, e.g. ultrasonic or capacitive sensing · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F1/1637

  Details related to the display arrangement, including those related to the mounting of the display in the housing · CPC title