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
Life of this patent
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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
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 a light-transmitting portion on which the light-blocking layer is not formed,
- the light-blocking layer has an arithmetic mean value of light transmittance for a visible wavelength range of 380 to 780 nm of 0.05% or less, 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.
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, and
- a light-transmitting portion on which the light-blocking layer is not formed,
- wherein the light-blocking layer has an arithmetic mean value of light transmittance for a visible wavelength range of 380 to 780 nm of 0.05% or less, 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.
Dependencies are inferred from the claim text.