Method of manufacturing display unit and system for laminating optical film

Patent metadata

Field	Value
Publication number	US-10324331-B2
Application number	US-201615303070-A
Country	US
Kind code	B2
Filing date	Apr 29, 2016
Priority date	Apr 30, 2015
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

The present specification relates to a display unit manufacturing method and an optical film laminating system.

First claim

The invention claimed is:

1. A method of manufacturing a display unit, the method comprising:
preparing a panel unit having a light source side polarizing plate provided on one surface of a panel;
sequentially attaching two or more optical films onto the light source side polarizing plate by supplying each optical film onto the light source side polarizing plate from a roll around which that optical film is wound; and
attaching a screen unit side polarizing plate to a surface of the panel, which is opposite to the surface of the panel on which the light source side polarizing plate is provided, so that a transmission axis of the light source side polarizing plate and a transmission axis of the screen unit side polarizing plate are perpendicular to each other, before the preparing of the panel unit having the light source side polarizing plate, before the attaching of the two or more optical films, or after the attaching of the two or more optical films.

2. The method of claim 1 , wherein the two or more optical films include at least one of a brightness enhancement film, a light collecting sheet, and a diffusion film.

3. The method of claim 1 , wherein the attaching of the two or more optical films includes attaching a brightness enhancement film onto the light source side polarizing plate by supplying the brightness enhancement film onto the light source side polarizing plate from a roll around which the brightness enhancement film is wound so that a transmission axis of the light source side polarizing plate and a transmission axis of the brightness enhancement film are parallel to each other.

4. The method of claim 1 , wherein the attaching of the two or more optical films includes: attaching a brightness enhancement film onto the light source side polarizing plate by supplying the brightness enhancement film onto the light source side polarizing plate from a roll around which the brightness enhancement film is wound so that a transmission axis of the light source side polarizing plate and a transmission axis of the brightness enhancement film are parallel to each other; and attaching a light collecting sheet onto the brightness enhancement film by supplying the light collecting sheet onto the brightness enhancement film from a roll around which the light collecting sheet is wound.

5. The method of claim 1 , further comprising:
providing a light source on the two or more optical films after the attaching of the two or more optical films.

6. The method of claim 1 , wherein the preparing of the panel unit includes attaching a plate-shaped polarizing plate onto one surface of the panel, or attaching a polarizing plate onto one surface of the panel by supplying the polarizing plate onto one surface of the panel from a roll around which the polarizing plate is wound.

7. The method of claim 1 , wherein the preparing of the panel unit includes:
supplying the panel by conveying the panel in any one direction; and
attaching the light source side polarizing plate onto one surface of the panel by supplying the light source side polarizing plate onto the panel from a roll around which the light source side polarizing plate is wound.

8. The method of claim 1 , comprising:
supplying the panel by conveying the panel in any one direction;
attaching the light source side polarizing plate onto one surface of the panel by supplying the light source side polarizing plate from a roll around which the light source side polarizing plate is wound; and
attaching a screen unit side polarizing plate onto the other surface of the panel by supplying the screen unit side polarizing plate from a roll around which the screen unit side polarizing plate is wound so that a transmission axis of the light source side polarizing plate and a transmission axis of the screen unit side polarizing plate are perpendicular to each other.

9. The method of claim 8 , wherein the attaching of the two or more optical films includes attaching a brightness enhancement film onto the light source side polarizing plate by supplying the brightness enhancement film onto the light source side polarizing plate from a roll around which the brightness enhancement film is wound so that the transmission axis of the light source side polarizing plate and a transmission axis of the brightness enhancement film are parallel to each other.

10. The method of claim 1 , wherein a total thickness of the two or more optical films is 20 μm or larger and 700 μm or smaller.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Beom Seok
• Park Kyung Hyeok
• Choi Hang Suk
• Jang Eung Jin
• Lee Sukjae
• Kim Kyoung Sik

Classifications

• B32B2457/202

  LCD, i.e. liquid crystal displays · CPC title

• B32B38/1816

  Cross feeding of one or more of the layers · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title

• B32B37/223

  One or more of the layers being plastic · CPC title

• G02F1/1303

  Apparatus specially adapted to the manufacture of LCDs · CPC title