Title:
光学フィルム
Document Type and Number:
Japanese Patent JP7338306
Kind Code:
B2
Abstract:
To provide an optical film that can make the emission intensity of a visible light region uniform when incorporated into an image display device in combination with an LED light source, and can make hue of a display screen uniform, but can prevent brightness from deteriorating.SOLUTION: An optical film is a polyester film containing a dye and/or a pigment, having a film haze of 6% or less, a transmittance of 450 nm light of 4% or less, and a transmittance of 550 nm light of 20% or more, and a color tone (b) value of 50 or more.SELECTED DRAWING: None
Inventors:
Keita Kawanami
Application Number:
JP2019143866A
Publication Date:
September 05, 2023
Filing Date:
August 05, 2019
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
G02B5/22; B32B7/023; B32B27/36; C08J5/18; C08J7/043; C08J7/044; C08L67/00
Domestic Patent References:
| JP2017026948A | ||||
| JP2015148813A | ||||
| JP2010170866A | ||||
| JP2013098152A | ||||
| JP2002138203A | ||||
| JP2014119642A |
Foreign References:
| US20150309368 | ||||
| CN108279455A |
Attorney, Agent or Firm:
Patent Attorney Corporation Ichizawa / Kawada International Patent Office