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Title:
BACKLIGHT AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/066050
Kind Code:
A1
Abstract:
Provided is a backlight that, even when reduced in thickness, has an exceptional balance between light utilization efficiency and luminance uniformity. The problem is solved by: having a substrate, a plurality of blue light sources positioned discretely on one side of the substrate, and a patterned cholesteric layer positioned on the emission side of the blue light sources; and having the integrated reflectance, at a wavelength of 450 nm, of a portion of the pattered cholesteric layer that overlaps the blue light sources be at least 30% higher than the integrated reflectance of a portion of the pattered cholesteric layer that does not overlap the blue light sources.

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Inventors:
KANEIWA HIDEKI (JP)
SANETO RYUJI (JP)
ISHIGURO MAKOTO (JP)
NAGAI MICHIO (JP)
Application Number:
PCT/JP2020/037261
Publication Date:
April 08, 2021
Filing Date:
September 30, 2020
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
F21S2/00; F21V9/30; F21V9/32; F21V9/40; G02B5/26; G02F1/13357; F21Y105/16; F21Y115/10; F21Y115/15; F21Y115/20; F21Y115/30
Foreign References:
US20160195768A12016-07-07
JP2015513187A2015-04-30
JP2009540617A2009-11-19
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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