Sealing tape, phosphor sheet, lighting device, liquid-crystal display, method for manufacturing phosphor sheet, and sealing method

Patent metadata

Field	Value
Publication number	US-9957421-B2
Application number	US-201515119507-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 21, 2014
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

Provided are a sealing tape that can prevent tape width misalignment, air bubble inclusion, and creasing even when the sealing tape is affixed in a folded state, a phosphor sheet using the same, a lighting device, a liquid-crystal display, a method for manufacturing a phosphor sheet, and a sealing method. The sealing tape ( 10 ) includes an adhesive layer ( 11 ), a gas barrier layer ( 12 ), a bonding layer ( 13 ), and a support film layer ( 14 ) laminated in stated order, and has an incision ( 15 ) into the support film layer ( 14 ) in a thickness direction. The incision ( 15 ) is located substantially centrally in a width direction and extends in a longitudinal direction. Accordingly, tape width misalignment, air bubble inclusion, and creasing can be prevented even when the sealing tape is affixed in a folded state.

First claim

The invention claimed is:

1. A sealing tape comprising:
an adhesive layer, a gas barrier layer, a bonding layer, and support film layer laminated in stated order; and
an incision into the support film layer in a thickness direction, the incision being located substantially centrally in a width direction and extending in a longitudinal direction.

2. The sealing tape of claim 1 , wherein
the incision located substantially centrally in the width direction and extending in the longitudinal direction passes entirely through the support film layer in the thickness direction.

3. The sealing tape of claim 2 , wherein
the incision located substantially centrally in the width direction and extending in the longitudinal direction passes partway through the bonding layer in the thickness direction.

4. The sealing tape of claim 1 , wherein
the gas barrier layer includes an aluminum layer, a bonding layer, a substrate, a bonding layer, and an aluminum layer laminated in stated order.

5. The sealing tape of claim 1 , wherein
the gas barrier layer includes a metal oxide layer, a bonding layer, a substrate, a bonding layer, and a metal oxide layer laminated in stated order.

6. The sealing tape of claim 1 , wherein
the bonding layer contains a phosphor.

7. The sealing tape of claim 1 , wherein
the support film layer is made from one or more from among a polyester, a polyolefin, a polyarylate, a polycarbonate, a polyacrylate, and a polyethersulfone.

8. The sealing tape of claim 1 , wherein
the support film layer has a thickness of at least 10 μm and no greater than 50 μm.

9. The sealing tape of claim 1 , wherein
the bonding layer has a thickness of at least 10 μm and no greater than 50 μm.

10. A phosphor sheet comprising:
a first water vapor barrier film;
a second water vapor barrier film;
a phosphor layer sandwiched between the first water vapor barrier film and the second water vapor barrier film; and
a sealing tape sealing edges of the first water vapor barrier film and the second water vapor barrier film, wherein
the sealing tape includes an adhesive layer, a gas barrier layer, a bonding layer, and a support film layer laminated in stated order, and has an incision into the support film layer in a thickness direction, the incision being located substantially centrally in a width direction and extending in a longitudinal direction.

11. The phosphor sheet of claim 10 , wherein
the bonding layer of the sealing tape contains a phosphor.

12. The phosphor sheet of claim 11 , wherein
the phosphor layer contains a phosphor through which white light is obtained from blue light, and
the phosphor includes a yellow phosphor.

13. The phosphor sheet of claim 10 , wherein
the phosphor layer contains a sulfide phosphor.

14. The phosphor sheet of claim 13 , wherein
the phosphor layer contains a red phosphor and a green phosphor.

15. A lighting device comprising the phosphor sheet of claim 10 .

16. A liquid-crystal display comprising the phosphor sheet of claim 10 .

17. A method for manufacturing a phosphor sheet comprising
sandwiching a phosphor layer between a first water vapor barrier film and a second water vapor barrier film, and affixing a sealing tape to edges of the first water vapor barrier film and the second water vapor barrier film, wherein
the sealing tape includes an adhesive layer, a gas barrier layer, a bonding layer, and a support film layer laminated in stated order, and has an incision into the support film layer in a thickness direction, the incision being located substantially centrally in a width direction and extending in a longitudinal direction.

Assignees

• Dexerials Corp

Inventors

• Ito Yasushi
• Hori Tomomitsu
• Hiyama Teruo
• Yamazaki Akihiro
• Ueno Yoshifumi

Classifications

• B32B2457/202

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

• B32B2457/20

  Displays, e.g. liquid crystal displays, plasma displays · CPC title

• B32B27/18

  characterised by the use of special additives · CPC title

• B32B27/08

  of synthetic resin · CPC title

• C09J133/00

  Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers · CPC title