Wavelength Conversion Sheet, Backlight, And Liquid Crystal Display Device

Abstract: The present invention provides a wavelength conversion sheet having excellent adhesion between a phosphor layer and a primer layer even after a long-term environment test. Provided is a wavelength conversion sheet comprising: a phosphor layer including a phosphor; and a wavelength conversion sheet film provided on at least one surface side of the phosphor layer. The wavelength conversion sheet film is formed by laminating at least a base material layer and a primer layer, the primer being in contact with the phosphor layer, and the phosphor layer and the primer layer containing an element X. When the average value of the ratio of the element X in the phosphor layer obtained by X-ray photoelectron spectroscopy in a region from an interface between the primer layer and the phosphor layer to 400 nm in the thickness direction of the phosphor layer is represented by CQD (atomic%) and the ratio of the element X in the primer layer obtained by X-ray photoelectron spectroscopy at an arbitrarily defined depth in a region of 20-40 nm in the thickness direction of the primer layer from the interface is represented by CPR(atomic%), CPR/CQD is 0.10 or less.

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents