Ink composition for reflective sheet, display apparatus including the same and method of manufacturing display apparatus

Patent metadata

Field	Value
Publication number	US-11237427-B2
Application number	US-201816760511-A
Country	US
Kind code	B2
Filing date	Oct 5, 2018
Priority date	Nov 21, 2017
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

The disclosed embodiments relate to an ink composition for reflective sheet capable of preventing a luminance difference occurring at an upper or lower end of a display panel and display apparatus including the same and method of manufacturing the display apparatus.The display apparatus of the disclosed embodiment comprises a display panel to display an image, a light source configured to supply light to the display panel, a light guide plate configured to guide light emitted from the light source, a reflective sheet movable between a first state close to the lower surface of the light guide plate and a second state farther away from the lower surface of the light guide plate than the first state, and a reflective pattern provided on the reflective sheet and configured to be disposed in contact with the light guide plate in the first state, wherein the reflective pattern on the reflective sheet is formed of an acrylate resin including a multi-functional acrylate monomer.

First claim

The invention claimed is:

1. A display apparatus comprising:
a display panel to display an image;
a light source configured to supply light to the display panel;
a light guide plate configured to guide light emitted from the light source;
a reflective sheet movable between a first state close to a lower surface of the light guide plate and a second state farther away from the lower surface of the light guide plate than the first state; and
a reflective pattern provided on the reflective sheet and configured to come in contact with the light guide plate in the first state,
wherein the reflective pattern on the reflective sheet is formed of an acrylate resin including a multi-functional acrylate monomer.

2. The display apparatus of claim 1 , wherein the multi-functional acrylate monomer is 3 to 5 wt % based on the total weight of the acrylate resin.

3. The display apparatus of claim 1 , wherein the multi-functional acrylate monomer is one element selected from a group consisting of a hydroxyethyl acrylate group, a hydroxyl propyl methacrylate group, and a melamine group.

4. The display apparatus of claim 1 , further comprising a reflective sheet driving unit configured to move the reflective sheet from the first state to the second state.

5. The display apparatus of claim 4 , wherein the reflective sheet driving unit includes a contact member in contact with the reflective sheet and a moving member configured to move the contact member to move the reflective sheet.

6. The display apparatus of claim 1 , wherein a refractive index of the reflective pattern is 1.49.

7. The display apparatus of claim 1 , further comprising a backlight unit including the reflective sheet and the light source, and a middle mold configured to support the display panel.

8. The display apparatus of claim 7 , wherein the backlight unit further includes a printed circuit board on which the light source is mounted and a plurality of optical sheets disposed on a lower portion of the display panel.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jung Il Yong
• Lee Young Chul
• Kim Jong Bin
• Jeon Jong Pil
• Cho Byoung-Jin
• Hur Jean

Classifications

• C09D11/101

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• G02B6/0043

  provided on the surface of the light guide · CPC title

• C09D11/106

  containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• G02F1/133615

  Edge-illuminating devices, i.e. illuminating from the side · CPC title

• G02B6/3522

  the optical element enabling or impairing total internal reflection (using evanescent coupling G02B6/3536) · CPC title