Reflective body and a light-emitting device equipped with the same

• US 8,980,986 B2
• Filed: 09/29/2011
• Issued: 03/17/2015
• Est. Priority Date: 11/12/2010
• Status: Active Grant

• Current Assignee: Shenzhen Wote Advanced Materials Co., Ltd.
• Original Assignee: Shenzhen Wote Advanced Materials Co., Ltd.
• Inventors: Lee, Youn Eung, Lee, Jin Kyu, Oh, Young Taek
• Primary Examiner(s): Choi, Ling
• Assistant Examiner(s): NGUYEN, THUY-AI N
• Application Number:
  US13/883,725
• Publication Number:
  US 20130231436A1
• Time in Patent Office: 1,265 Days
• Field of Search: 524/492
• US Class Current: 524/492
• CPC Class Codes: C08G 63/065 the hydroxy and carboxylic ester groups being bound to aromatic rings
• CPC Class Codes: C08K 2003/2237 of titanium
• CPC Class Codes: C08K 2201/003 Additives being defined by their diameter
• CPC Class Codes: C08K 2201/004 Additives being defined by their length
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 7/14 Glass
• CPC Class Codes: C08L 67/04 Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

A reflector and a light-emitting device including the same. The reflector includes a wholly aromatic liquid crystalline polyester resin compound that includes a repeating unit derived from a hydroxybenzoic acid and a repeating unit derived from a hydroxynaphthoic acid, but does not include a repeating unit derived from an aromatic dicarboxylic acid, wherein the wholly aromatic liquid crystalline polyester resin compound further includes a white inorganic filler.

Claims

1. A reflector comprising:

a wholly aromatic liquid crystalline polyester resin compound that comprises a repeating unit derived from a hydroxybenzoic acid and a repeating unit derived from a hydroxynaphthoic acid, but does not comprise a repeating unit derived from an aromatic dicarboxylic acid,

wherein the wholly aromatic liquid crystalline polyester resin compound further comprises a white inorganic filler,

wherein the wholly aromatic liquid crystalline polyester resin comprises 70 to 80 parts by mol of the repeating unit derived from the hydroxybenzoic acid and 20 to 30 parts by mol of the repeating unit derived from the hydroxynaphthoic acid,

wherein the amount of the white inorganic filler is in the range of 10 to 60 parts by weight based on 100 parts by weight of the wholly aromatic liquid crystalline polyester resin compound,

wherein the reflector has the initial reflectance decline of 1% or less, as measured when the reflector is exposed to a xenon lamp having a rated output of 50 W, a maximum luminous flux of 5,000 lumen, and a color temperature of 4,300K.

2. The reflector of claim 1, wherein the hydroxybenzoic acid comprises one selected from the group consisting of p-hydroxybenzoic acid, 3-hydroxybenzoic acid, 2-hydroxybenzoic acid, and any combination thereof.

3. The reflector of claim 1, wherein the hydroxynaphthoic acid is selected from the group consisting of 6-hydroxy-2-naphthoic acid, 3-hydroxy-2-naphthoic acid, 2-hydroxy-1-naphthoic acid, 1-hydroxy-2-naphthoic acid, and any combination thereof.

4. The reflector of claim 1, wherein the white inorganic filler comprises titanium oxide.

5. The reflector of claim 4, wherein the wholly aromatic liquid crystalline polyester resin compound further comprises at least one of a glass fiber and wollastonite.

6. A light-emitting device comprising a reflector according to claim 1.

7. The light-emitting device of claim 6, wherein the light-emitting device is a light emitting diode (LED).