Apparatus and method for manufacturing polarizer
AssigneeSamsung Electronics Co., Ltd.
InventorKweon Sam HONG
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Abstract
A method and apparatus for manufacturing a polarizer for use in a large-sized liquid crystal display (LCD) with a size of 60 inches or more includes controlling the degree of stretching of a PVA film to have a width corresponding to a length of a long side of an LCD panel, cutting the stretched PVA film to fabricate PVA sheets, and attaching TAC films and protection films to each of the PVA sheets. Since the PVA film is fabricated into the PVA sheets, it is possible to fabricate a polarizer without changing the widths of the TAC films and protection films. Therefore, costs can be reduced that are associated with facility investment for manufacturing polarizers for LCDs having a size of 60 inches or more.
Claims19
A method for manufacturing a polarizer for a liquid crystal display (LCD) panel, the method comprising:
- preparing a polyvinyl alcohol (PVA) film;
- dyeing a dichroic element on a surface of the PVA film and stretching the dyed PVA film to have a width corresponding to a long side of the LCD panel;
- fabricating a PVA sheet by cutting the stretched PVA film to the length of a short side of the LCD panel;
- and
- sequentially attaching triacetyl cellulose (TAC) films and protection films on upper and lower surfaces of the PVA sheet.
A method for manufacturing a polarizer for an LCD panel, the method comprising:
- preparing a PVA film;
- dyeing a dichroic element on a surface of the PVA film and stretching the dyed PVA film to form a light absorbing layer in a direction perpendicular to the stretching direction;
- and
- sequentially attaching TAC films and protection films to upper and lower surfaces of the stretched PVA film.
A method for manufacturing a polarizer for an LCD, the method comprising:
- preparing a PVA film with a first width larger than a long side of the LCD, TAC films with a second width smaller than a long side of the LCD, and protection films with a third width smaller than the long side of the LCD;
- stretching the PVA film with the first width to form a PVA film with a fourth width equal to or larger than the long side of the LCD;
- cutting the PVA film with the fourth width to a length smaller than the second and third widths;
- and
- attaching the TAC films with the second width and the protection films with the third width to upper and lower surfaces of the cut PVA film.
Dependencies are inferred from the claim text.