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US 8,506,149 B2Granted
Optical sheets
AssigneeKolon Industries, Inc.
InventorsKyung Nam Kim, Hyun Jung Kim, Sang Kyun Kim, Hyun Jin Kim, Jong Min Park, Chung Seock Kang
Life of this patent
Estimating the term…
Abstract
Disclosed is an optical sheet for use in liquid crystal displays, which simultaneously functions to uniformly diffuse light emitted from a light guide plate and a diffusion plate and to increase brightness, decreases the loss of light, and enables the fabrication of thinner liquid crystal displays.
Claims18
An optical sheet disposed on a light source to constitute a backlight unit assembly, comprising:
- a transparent substrate layer;
- a light diffusion layer formed on one surface of the transparent substrate layer and containing a binder resin and light-diffusing particles, in which a difference in refractive index between the light-diffusing particles and the binder resin is 0.05 or less;
- and
- a prism layer formed on the light diffusion layer, said prism layer having a refractive index which is 0.01-0.2 higher than the refractive index of the binder resin of the light diffusion layer,
- wherein the transparent substrate layer, the light diffusion layer, and the prism layer are disposed in this order from an incident plane of the light source.
2 more elements
A backlight unit assembly, comprising:
- a light source;
- an optical sheet;
- and
- a light diffusion sheet,
- wherein the optical sheet comprises
- a transparent substrate layer,
- a light diffusion layer formed on one surface of the transparent substrate layer and containing a binder resin and spherical light-diffusing organic particles, said binder resin and said spherical light-diffusing organic particles both being optically isotropic, in which a difference in refractive index between the spherical light-diffusing organic particles and the binder resin is 0.05 or less, and
- a prism layer formed on the light diffusion layer, said prism layer having a refractive index which is 0.01-0.2 higher than the refractive index of the binder resin of the light diffusion layer;
- wherein the transparent substrate layer, the light diffusion layer, and the prism layer are disposed in this order from an incident plane of the light source, and
- wherein the light diffusion sheet is disposed on the prism layer of the optical sheet or on the transparent substrate layer of the optical sheet.
7 more elements
A backlight unit assembly, comprising:
- a light source;
- an optical sheet;
- and
- a prism sheet,
- wherein the optical sheet comprises
- a transparent substrate layer,
- a light diffusion layer formed on one surface of the transparent substrate layer and containing a binder resin and spherical light-diffusing organic particles, said binder resin and said spherical light-diffusing organic particles both being optically isotropic, in which a difference in refractive index between the spherical light-diffusing organic particles and the binder resin is 0.05 or less, and
- a prism layer formed on the light diffusion layer, which has a refractive index which is 0.01-0.2 higher than the refractive index of the binder resin of the light diffusion layer;
- wherein the transparent substrate layer, the light diffusion layer, and the prism layer are disposed in this order from an incident plane of the light source, and
- wherein the prism sheet is disposed on the prism layer of the optical sheet or on the transparent substrate layer of the optical sheet.
7 more elements
A backlight unit assembly, comprising:
- a light source;
- an optical sheet;
- and
- a protective film,
- wherein the optical sheet comprises
- a transparent substrate layer,
- a light diffusion layer formed on one surface of the transparent substrate layer, said light diffusion layer containing a binder resin and spherical light-diffusing organic particles, said binder resin and said spherical light-diffusing organic particles both being optically isotropic, in which a difference in refractive index between the spherical light-diffusing organic particles and the binder resin is 0.05 or less, and
- a prism layer formed on the light diffusion layer, which has a refractive index which is 0.01-0.2 higher than the refractive index of the binder resin of the light diffusion layer;
- wherein the transparent substrate layer, the light diffusion layer, and the prism layer are disposed in this order from an incident plane of the light source, and
- wherein the protective film is disposed on the prism layer of the optical sheet or on the transparent substrate layer of the optical sheet.
7 more elements
Dependencies are inferred from the claim text.