Light diffusion sheet, backlight unit, liquid crystal display device, and information apparatus
AssigneeKeiwa Inc.
InventorsTakuya TAKESUE, Chengheng TSAI, Mayuko NOZAWA
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Abstract
A light diffusion sheet capable of improving brightness uniformity is provided. The light diffusion sheet (43) has a plurality of recesses (22) having an inverted substantially polygonal pyramid shape on at least one surface of a main body sheet composed of a resin. A refractive index of at least one layer included in the main body sheet configuring the light diffusion sheet (43) for light having a wavelength of 450 nm is 1.55 or more and 1.7 or less. An absorption rate of the main body sheet configuring the light diffusion sheet (43) for light having the wavelength of 450 nm is 7.0% or less.
Claims13
A light diffusion sheet in which a plurality of recesses having an inverted polygonal pyramid shape are provided on at least one surface of a main body sheet composed of a resin,
- wherein the main body sheet includes at least one layer,
- wherein a refractive index of a layer configuring the main body sheet for light having a wavelength of 450 nm is 1.55 or more and 1.7 or less, and
- wherein an absorption rate of the main body sheet for light having the wavelength of 450 nm is 7.0% or less.
Dependencies are inferred from the claim text.