Title:
光拡散シート及びこれを用いたバックライトユニット
Document Type and Number:
Japanese Patent JP4271462
Kind Code:
B2
Abstract:
The purpose of the invention is to provide a kind of light diffusion film and the related backlight module. In addition to maintaining high light transmission ratio, the light diffusion film can increase the heat durability, heat-durable size-stability and endurable characteristic. Even receiving the heat of lamp tube or UV irradiation, the phenomenon of bending or becoming yellow is not easily generated. The backlight module uses the light diffusion film so as to decrease the phenomena of non uniform and insufficient brightness. The invented light diffusion film contains the followings: the base material layer, which is transparent; and light diffusion layer, which is formed by stacking on the surface of the base material layer. The light diffusion layer is formed by containing light diffusion agent in the bonding agent. The bonding agent is composed of the polymeric material formed by polyhydric alcohol and micro inorganic filler, and has a glass transformation temperature larger than 50 DEG C and below 80 DEG C. The average particle diameter of micro inorganic filler is larger than 5nm and smaller than 50 nm.
Inventors:
Kamikita Masakazu
Hiroshi Mineo
Hiroshi Mineo
Application Number:
JP2003064123A
Publication Date:
June 03, 2009
Filing Date:
March 10, 2003
Export Citation:
Assignee:
Keiwa Co., Ltd.
International Classes:
G02B5/02; B32B7/02; B32B27/00; B32B27/20; B82Y20/00; B82Y30/00; F21S2/00; F21V8/00; G02B1/10; G02B1/16; G02F1/13357; F21Y103/00
Domestic Patent References:
| JP6059107A | ||||
| JP2001131419A | ||||
| JP2001066404A | ||||
| JP2000089007A | ||||
| JP2001318210A | ||||
| JP2001172475A | ||||
| JP2002082207A |
Attorney, Agent or Firm:
Hajime Amano