Dai Nippon Printing Co., Ltd.

Ryutaro Harada

Takeshi Sakamoto

Mitsuru Iida

Shuichi Tamura

Masayuki Sugawara

Tomohisa Ishizawa

Akihito Haruki

Shota Yamanishi

Satoshi Mitamura

Tatsuji Nakajima

Ryoma Yasui

Yuko Fujioka

Syuichi Tamura

Yasutomo Teshima

Hiroyuki Kusukawa

Takuya Hamaguchi

Tatsunori Itai

Provided is a barrier film that can suppress a change in color when applied to a wavelength conversion sheet. A barrier film for a wavelength conversion sheet, comprising an inorganic oxide layer A, an organic coating layer B, an inorganic oxide layer C, and an organic coating layer D in presented order on a light-transmitting base material; wherein refractive indexes of the inorganic oxide layer A, the organic coating layer B, the inorganic oxide layer C, and the organic coating layer D are defined as n, n, n, and n, respectively; thicknesses of the organic coating layer B and the organic coating layer D are defined as tand t, respectively; nand nare larger than nand n; and drepresented by the following expression 1 represents a range of x±0.10 wherein x is an integer of 2 to 13./112.5 nm+/112.5 nm  (Expression 1)

Barrier film, wavelength conversion sheet using same, backlight and liquid crystal display device

A barrier film for a wavelength conversion sheet, which can effectively suppress adhering of a light guide plate to the wavelength conversion sheet and suppresses damaging of a wavelength conversion sheet, a light guide plate, a diffusion plate, etc. A barrier film includes at least a barrier layer and base material layers. The barrier film has stacked on one surface thereof a mat layer including a resin and fillers which at least partially project from the mat layer. In a plan view, the proportion of the projecting fillers from the mat layer that are viewed as having a particle size at least twice the thickness of the mat layer is 20-80% of the total fillers projecting from the mat layer, and the total number of fillers in a square of 1 mmin the plan view of the mat layer is 1800 or more.

Barrier film, wavelength conversion sheet using barrier film, and display device using wavelength conversion sheet

Provided is a barrier film for a wavelength conversion sheet that, when applied to a wavelength conversion sheet, can suppress in-plane uneven brightness of the wavelength conversion sheet. A barrier film for a wavelength conversion sheet, the barrier film including a first base material film, a second base material film, a barrier layer, a primer layer, and an adhesive layer positioned between the first base material film and the second base material film, wherein the barrier film satisfies the following condition 1: <Condition 1> A surface of the barrier film on a side having the primer layer with respect to the adhesive layer is defined as a surface 1; an elevation of the surface 1 is measured at intervals of 1 mm to obtain elevation data about the surface 1; a contour curve of the surface 1 determined by the elevation data is defined as a contour curve 1; at least a part of the surface 1 has at least one irregularity 1 having a height difference between an adjacent peak and valley of 0.001 mm or more and 0.600 mm or less in the contour curve 1 in a predetermined direction; when a height difference and a width of the irregularity 1 are defined as H [mm] and W [mm], respectively, the following expression (1): H/W≤1.5×10(1) is satisfied.

Barrier film for wavelength conversion sheet, wavelength conversion sheet, backlight, and liquid crystal display device using barrier film, and method for selecting barrier film for wavelength conversion sheet

Provided is a barrier film that can suppress a change in color when applied to a wavelength conversion sheet. A barrier film for a wavelength conversion sheet, comprising an inorganic oxide layer A, an organic coating layer B, an inorganic oxide layer C, and a primer layer D in presented order on a light-transmitting base material, wherein thicknesses of the light-transmitting base material, the inorganic oxide layer A, the organic coating layer B, the inorganic oxide layer C, and the primer layer D are defined as t, t, t, t, and t, respectively; tis 150 nm or more and 500 nm or less; and t/tis 0.55 or more and 1.65 or less.

Barrier film, and wavelength conversion sheet, back light, and liquid crystal display device which use same

Provided is a film for a wavelength conversion sheet that can suppress a change in color with time when applied to a wavelength conversion sheet. A film for a wavelength conversion sheet, comprising a primer layer and a first base material film in presented order, wherein a refractive index of the primer layer is defined as n, a thickness of the primer layer is defined as t, and a refractive index of the first base material film is defined as n, and the following condition 1 or the following condition 2 is satisfied: Condition 1: n<n, and drepresented by the following expression 1 represents a range of x±0.10 wherein x is an odd integer; Condition 2: n>n, and drepresented by the following expression 1 represents a range of x±0.10 wherein x is an even integer; Expression 1: d=n×t/112.5 nm.

Film for wavelength conversion sheet, and wavelength conversion sheet, backlight, and liquid crystal display device which use same

Provided is a barrier film that can suppress a change in color when applied to a wavelength conversion sheet. A barrier film for a wavelength conversion sheet that is a barrier film comprising at least one inorganic oxide layer and at least one organic coating layer on one surface of a light-transmitting base material, wherein a value of a water vapor transmission rate according to JIS K7129-2:2019 is 0.20 g/m·day or less, and when a spectral transmittance of the barrier film is measured with a surface of a side comprising the inorganic oxide layer and the organic coating layer as a light coming-in surface, the barrier film comprises a spectral transmittance bottom at which the spectral transmittance changes from decreasing to increasing, or a spectral transmittance peak at which the spectral transmittance changes from increasing to decreasing, in the range of 450 nm±7 nm.

Barrier film, and wavelength conversion sheet, backlight, and liquid crystal display device in which same is used, as well as method for selecting barrier film

Provided are a barrier film having superior close adhesion to a phosphor layer when used for a wavelength conversion sheet, a wavelength conversion sheet having the barrier film, and a backlight and a display device including the wavelength conversion sheet. A barrier film for a wavelength conversion sheet, comprising: a barrier layer; and a primer layer, wherein the primer layer comprises a cured product of a polyurethane-based resin composition, and when a surface of an opposite side of the primer layer from the barrier layer is subjected to X-ray photoelectron spectroscopy to obtain a C1s spectrum, P2/P1 is 0.55 or more, where P1 is an area of a peak assigned to a C—C bond in the C1s spectrum and P2 is an area of a peak assigned to a C—O bond in the C1s spectrum.

Barrier film, wavelength conversion sheet, back light, and display device

The main object of the present invention is to provide a color filter for a transflective type color liquid crystal display which is easily produced and capable of displaying the same color tone with both of a reflecting light and a transmitting light, and shows light scattering in a reflective light region. In order to attain the above mentioned object, the present invention provides a color filter for transflective type color liquid crystal display comprising a transparent substrate and a reflective light coloring layer and a transmissive light coloring layer formed on the transparent substrate, wherein, a convex-concave is formed on a surface of a liquid crystal layer side of the reflective light coloring layer, and an average thickness of the reflective light coloring layer is formed to be thinner than the thickness of the transmissive light coloring layer, and a refractive index difference between the reflective light coloring layer and a layer in contact with the surface of the convex-concave formed side of the reflective light coloring layer, is 0.1 or more. Further, a main object of the present invention is to provide a color filter for transflective type liquid crystal display comprising a transparent membrane pattern region obtained by laminating: a transparent substrate; a transparent membrane pattern layer comprising a transparent membrane formed in a pattern on the transparent substrate; and a coloring layer formed so as to cover the transparent membrane pattern layer.

Color filter for transflective type liquid crystal display

Black matrix base board and manufacturing method therefor, and liquid

A black matrix substrate is provided with a substrate, and a black pattern formed on the substrate. The black pattern includes at least metal particles in a resin pattern, which comprises resin formed in a pattern shape. The metal particles have such a particle diameter distribution that particles having particle diameters in a range of 5 nm to 50 nm are not less than 80% of the total particles. A projected area density at a conversion of 600 .ANG. thickness of the metal particles in the black pattern, is not less than 60% An optical density of the black matrix substrate is not less than 1.5. A color filter, which has a high contrast ratio, can be constructed by use of this black matrix substrate. Further, a liquid crystal display device, which has a good image quality, can be constructed by use of this color filter.

Black matrix substrate, and color filter and liquid crystal display

A black matrix substrate is provided with a substrate, and a black pattern formed on the substrate. The black pattern includes at least metal particles in a resin pattern, which comprises resin formed in a pattern shape. The metal particles have such a particle diameter distribution that particles having particle diameters in a range of 5 nm to 50 nm are not less than 80% of the total particles. A projected area density at a conversion of 600 .ANG. thickness of the metal particles in the black pattern, is not less than 60%. An optical density of the black matrix substrate is not less than 1.5. A color filter, which has a high contrast ratio, can be constructed by use of this black matrix substrate. Further, a liquid crystal display device, which has a good image quality, can be constructed by use of this color filter.

Growing community of inventors

Tokyo, Japan

Ryutaro Harada