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Title:
GLASS PLATE, LIGHT GUIDE PLATE UNIT, PLANAR LIGHT EMITTING DEVICE, AND LIQUID CRYSTAL DISPLAY UNIT
Document Type and Number:
Japanese Patent JP2017063050
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a glass plate which has superior internal transmissivity to a light beam in a visible light region.SOLUTION: The present invention relates to a glass plate for a light guide plate made of a multicomponent oxide glass, the glass plate being characterized in that: an effective optical path length which is the distance from an end face on which light is made incident to an end face on the opposite side is 25-200 cm during use; a thickness is 0.5-10 mm; the total content of iron of the glass plate in terms of FeOis 5-50 ppm; 2.5 cm ppm≤L×B≤3000 cm ppm holds for an effective optical path length L cm of the glass plate and a B mass ppm which is the content of Feof the glass plate in terms of FeO; average internal transmissivity to the visible light region at the effective wavelength is 80% or larger; and a Y value of three stimulation values of an XYZ color specification system of JIS Z8701 (annexes) is 90% or larger.SELECTED DRAWING: None

Inventors:
TSUCHIYA HIROYUKI
ARAI YUSUKE
KUROIWA YUTAKA
NAKAJIMA TETSUYA
KONDO HIROMI
Application Number:
JP2016236992A
Publication Date:
March 30, 2017
Filing Date:
December 06, 2016
Export Citation:
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Assignee:
ASAHI GLASS CO LTD
International Classes:
F21V8/00; C03C3/085; C03C3/087; C03C3/091; C03C3/093; F21S2/00; G02B5/02; G02F1/13357
Attorney, Agent or Firm:
Nozomi Watanabe
Haruko Sanwa
Takemoto Yoichi