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US 2023/0053585 A1Published application
Light-emitting display device, and a light-blocking layer-equipped fiber sheet for use in light-emitting display device
AssigneeKuraray Co., Ltd.
InventorsTatsuya Daimon, Toshiyuki Ito, Daisuke Eguchi
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Abstract
A light-emitting display device includes: a light-emitting member; and a light-blocking layer-equipped fiber sheet that covers a light-emitting surface of the light-emitting member. The light-blocking layer-equipped fiber sheet includes a fiber sheet, and a light-blocking layer that is partially printed on at least one surface of the fiber sheet. The surface of the fiber sheet on which the light-blocking layer is formed has an arithmetic mean height Sa of 3 to 20 μm, as measured based on ISO 25178, and the fiber sheet has an apparent density of 0.5 g/cm3 or more.
Claims17
1:
- A light-emitting display device, comprising:
- a light-emitting member;
- and
- a light-blocking layer-equipped fiber sheet that covers a light-emitting surface of the light-emitting member,
- wherein the light-blocking layer-equipped fiber sheet comprises a fiber sheet, and a light-blocking layer that is partially printed on at least one surface of the fiber sheet, and
- the surface of the fiber sheet on which the light-blocking layer is formed has an arithmetic mean height Sa of 3 to 20 μm, as measured based on ISO 25178, and the fiber sheet has an apparent density of 0.5 g/cm3 or more.
3 more elements
2:
- The light-emitting display device according to claim 1, wherein the light-blocking layer is printed on a first surface of the fiber sheet, the first surface being located on a side of the light-emitting surface.
3:
- The light-emitting display device according to claim 1, wherein the light-blocking layer-equipped fiber sheet has, on a second surface of the fiber sheet, a napped surface formed by napping fibers of a surface layer of the fiber sheet, the second surface not being located on the side of the light-emitting surface.
4:
- The light-emitting display device according to claim 1, wherein the light-blocking layer is printed on a second surface of the fiber sheet, the second surface not being located on the side of the light-emitting surface.
5:
- The light-emitting display device according to claim 1, wherein the light-blocking layer is printed on both a first surface and a second surface of the fiber sheet, the first surface being located on the side of the light-emitting surface, and the second surface not being located on the side of the light-emitting surface.
6:
- The light-emitting display device according to claim 1, wherein the light-blocking layer-equipped fiber sheet further comprises a light-transmissive surface resin layer on a second surface of the fiber sheet, the second surface not being located on the side of the light-emitting surface.
7:
- The light-emitting display device according to claim 1, wherein the fiber sheet includes a non-woven fabric of ultrafine fibers having a fineness of 1 dtex or less, and 3 to 40 mass % of an elastic polymer impregnated into the non-woven fabric.
8:
- The light-emitting display device according to claim 1, wherein the light-blocking layer-equipped fiber sheet has a light-transmitting portion having an average value of light transmittance for a visible wavelength range of 380 to 780 nm, of 5 to 15%.
9:
- A light-blocking layer-equipped fiber sheet for use in a light-emitting display device configured to cover a light-emitting surface of a light-emitting member and selectively transmit light emitted from the light-emitting member, to display a symbol, a pattern, and/or an image via light emission, the light-blocking layer-equipped fiber sheet comprising:
- a fiber sheet having a first surface located on the side of the light-emitting surface, and a second surface located on a side of an outer surface of the light-emitting display device;
- and
- a light-blocking layer that is partially printed on at least one of the first surface and the second surface,
- wherein the surface of the fiber sheet on which the light-blocking layer is formed has an arithmetic mean height Sa of 3 to 20 μm, as measured based on ISO 25178, and the fiber sheet has an apparent density of 0.5 g/cm3 or more.
2 more elements
10:
- The light-emitting display device according to claim 2, wherein the light-blocking layer-equipped fiber sheet further comprises a light-transmissive surface resin layer on a second surface of the fiber sheet, the second surface not being located on the side of the light-emitting surface.
11:
- The light-emitting display device according to claim 10, wherein the light-blocking layer-equipped fiber sheet has a light-transmitting portion having an average value of light transmittance for a visible wavelength range of 380 to 780 nm, of 5 to 15%.
12:
- The light-emitting display device according to claim 11, wherein the fiber sheet includes a non-woven fabric of ultrafine fibers having a fineness of 1 dtex or less, and 3 to 40 mass % of an elastic polymer impregnated into the non-woven fabric.
13:
- The light-emitting display device according to claim 10, wherein the fiber sheet includes a non-woven fabric of ultrafine fibers having a fineness of 1 dtex or less, and 3 to 40 mass % of an elastic polymer impregnated into the non-woven fabric.
14:
- The light-emitting display device according to claim 2, wherein the light-blocking layer-equipped fiber sheet has, on a second surface of the fiber sheet, a napped surface formed by napping fibers of a surface layer of the fiber sheet, the second surface not being located on the side of the light-emitting surface.
15:
- The light-emitting display device according to claim 14, wherein the light-blocking layer-equipped fiber sheet has a light-transmitting portion having an average value of light transmittance for a visible wavelength range of 380 to 780 nm, of 5 to 15%.
16:
- The light-emitting display device according to claim 15, wherein the fiber sheet includes a non-woven fabric of ultrafine fibers having a fineness of 1 dtex or less, and 3 to 40 mass % of an elastic polymer impregnated into the non-woven fabric.
17:
- The light-emitting display device according to claim 14, wherein the fiber sheet includes a non-woven fabric of ultrafine fibers having a fineness of 1 dtex or less, and 3 to 40 mass % of an elastic polymer impregnated into the non-woven fabric.