Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
BACKLIGHT UNIT AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/143690
Kind Code:
A1
Abstract:
Provided are a backlight unit and an image display device. The backlight unit is configured so that: backlight luminance can be controlled for each area; included are a light source unit and a wavelength conversion member which is positioned on the light path of light emitted from the light source unit; the wavelength conversion member has a wavelength conversion layer which is excited by excitation light and at least includes a phosphor that emits green light and a phosphor that emits red light; the light source unit includes light sources which are allocated to each area; the control of backlight luminance for each area is carried out by controlling the emission intensity of the light source allocated to each area independently from the control of the emission intensities of light sources allocated to other areas; the light sources allocated to at least one area include a light source group consisting of at least two types of light sources having different maximum wavelength emissions; and the emission intensity of at least one type of light source included in the light source group can be controlled independent of the emission intensity of another light source included in the light source group.

Inventors:
YONEYAMA HIROYUKI (JP)
Application Number:
PCT/JP2016/056765
Publication Date:
September 15, 2016
Filing Date:
March 04, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FUJIFILM CORP (JP)
International Classes:
F21S2/00; F21V7/00; F21V7/22; F21V9/16; G02F1/133; G02F1/13357; F21Y115/10
Foreign References:
JP2010177191A2010-08-12
JP2013068905A2013-04-18
JP2013004263A2013-01-07
JP2012242682A2012-12-10
Attorney, Agent or Firm:
SIKs & Co. (JP)
Patent business corporation patent firm Sykes (JP)
Download PDF: