Display device, method of manufacturing the display device, and vehicle including the display device

Patent metadata

Field	Value
Publication number	US-2024079528-A1
Application number	US-202318342663-A
Country	US
Kind code	A1
Filing date	Jun 27, 2023
Priority date	Aug 29, 2022
Publication date	Mar 7, 2024
Grant date	—

Abstract

A display device includes a display panel, an anti-reflection member on the display panel, a window member on the anti-reflection member, and an adhesive layer between the anti-reflection member and the window member. The adhesive layer may have a stress relaxation value of about 0.30 to about 0.40 with respect to a strain of about 24% to about 26%. Accordingly, the display device including the adhesive layer may exhibit excellent or suitable reliability.

First claim

What is claimed is:

1 . A display device comprising:
a display panel; an anti-reflection member on the display panel; a window member on the anti-reflection member; and an adhesive layer between the window member and the anti-reflection member, wherein the adhesive layer has a stress relaxation value of about 0.30 to about 0.40 with respect to a strain of about 24% to about 26%.

2 . The display device of claim 1 , wherein the window member comprises:
a window divided into a transmission region and a bezel region; and a printing layer that does not overlap the transmission region and is on one surface of the window, the adhesive layer being in contact with a side surface of the printing layer and one surface of the printing layer crossing the side surface of the printing layer.

3 . The display device of claim 2 , wherein in the bezel region, the printing layer and the anti-reflection member are apart from each other with the adhesive layer therebetween.

4 . The display device of claim 2 , wherein the adhesive layer has a first thickness in the bezel region, and has, in the transmission region, a second thickness greater than the first thickness.

5 . The display device of claim 2 , wherein:
the printing layer comprises first to third printing parts sequentially stacked on the one surface of the window; a first side surface of the third printing part and one surface of the second printing part define a first step, and a second side surface of the second printing part and one surface of the first printing part define a second step; and the adhesive layer covers the first step and the second step.

6 . The display device of claim 1 , wherein the adhesive layer comprises a polymer resin derived from a resin composition comprising a monomer, an oligomer, and a crosslinking agent.

7 . A method of manufacturing a display device, the method comprising:
preparing a resin composition comprising a monomer, an oligomer, and a crosslinking agent; forming a preliminary adhesive layer having a creep value of about 10% to about 35% with respect to a stress of about 900 Pa to about 1100 Pa by curing the resin composition; applying the preliminary adhesive layer on an anti-reflection member on a display panel; applying a window member on the preliminary adhesive layer on the anti-reflection member; and forming an adhesive layer by curing the preliminary adhesive layer, wherein the adhesive layer has a stress relaxation value of about 0.30 to about 0.40 with respect to a strain of about 24% to about 26%.

8 . The method of claim 7 , wherein, in the forming of the adhesive layer, ultraviolet light of about 6500 mJ to about 8500 mJ is applied to the preliminary adhesive layer.

9 . The method of claim 7 , wherein, in the forming of the adhesive layer, light passes through the window member and is applied to the preliminary adhesive layer.

10 . The method of claim 7 , wherein the window member comprises:
a window divided into a transmission region and a bezel region; and a printing layer that does not overlap the transmission region and is on one surface of the window; wherein the preliminary adhesive layer is in contact with a side surface of the printing layer and one surface of the printing layer crossing the side surface of the printing layer.

11 . The method of claim 7 , wherein the oligomer has a weight of about 73.9 wt % to about 84.7 wt % with respect to a total weight of the resin composition.

12 . The method of claim 7 , wherein the oligomer comprises 2-ethylhexyl acrylate (2-EHA).

13 . The method of claim 7 , wherein the monomer has a weight of about 15.0 wt % to about 25.0 wt % with respect to a total weight of the resin composition.

14 . The method of claim 7 , wherein the monomer comprises at least one of 2-hydroxyethyl acrylate (2-HEA), butyl acrylate, isooctyl acrylate, isobornyl acrylate, octyl methacrylate, or benzyl acrylate.

15 . The method of claim 7 , wherein the crosslinking agent has a weight of about 0.1 wt % to about 0.5 wt % with respect to a total weight of the resin composition.

16 . The method of claim 7 , wherein the crosslinking agent comprises at least one of 1,6-hexanediol diacrylate (HDDA), pentaerythritol triacrylate (PETA), tripropylene glycol diacrylate (TPGDA), dipropylene glycol diacrylate (DPGDA), tricyclodecane dimethanol diacrylate (TCDDA), tetraethylene glycol diacrylate (TTEGDA), bisphenol F (ethylene oxide) 4 diacrylate, bisphenol A (ethylene oxide) 20 diacrylate, bisphenol A (ethylene oxide) 30 diacrylate, polyethylene glycol 400 diacrylate (PEG400DA), polyethylene glycol 200 diacrylate (PEG200DA), polyethylene glycol 300 diacrylate (PEG300DA), polyethylene glycol 600 diacrylate (PEG600DA), or polypropylene glycol 400 diacrylate (PPG400DA).

17 . The method of claim 7 , wherein the resin composition further comprises about 0.1 wt % to about 0.4 wt % of a photoinitiator with respect to a total weight of the resin composition.

18 . The method of claim 7 , wherein the resin composition further comprises about 0.1 wt % to about 0.2 wt % of a molecular weight modifier with respect to a total weight of the resin composition, and
the molecular weight modifier comprises n-dodecyl mercaptan.

19 . The method of claim 7 , wherein the resin composition further comprises an ultraviolet (UV) absorber.

20 . A vehicle comprising:
a first display device in a first region inside the vehicle and to display first information of the vehicle; and a second display device in a second region inside the vehicle and to display second information of the vehicle, wherein at least one of the first display device or the second display device comprises: a display panel, an anti-reflection member on the display panel, a window member on the anti-reflection member; and an adhesive layer between the window member and the anti-reflection member, and wherein the adhesive layer has a stress relaxation value of about 0.30 to about 0.40 with respect to a strain of about 24% to about 26%.

Assignees

• Samsung Display Co Ltd

Inventors

• Eun Sangwon
• Park Youngju
• Lee Joosub
• Lee Jinyoung

Classifications

• H10W90/00

  Package configurations · CPC title

• B60K35/425

  Anti-reflection arrangements · CPC title

• B60K35/22

  Display screens · CPC title

• B60K35/23

  Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) · CPC title

• H10H20/0362

  of encapsulations · CPC title