Optical element and backlight unit and liquid crystal display having the same
AssigneeLms Co., Ltd.
InventorsJeong-Ho Park, Young-Soo Do, Oh-Hyun Kwon
Life of this patent
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Abstract
An optical element capable of increasing an angular field while improving luminance by condensing light, and a backlight unit and a liquid crystal display including the same. The optical element includes a light-transmitting base film; a plurality of diffusing cavities or convex diffusing structures formed in one surface of the base film to diffuse light entering the base film; and a light-condensing pattern formed in the surface of the base film where the diffusing cavities or convex diffusing structures are formed so as to condense incident light.
Claims6
An optical element for condensing or diffusing light which is incident from a light source through a light guide plate comprising:
- a light-transmitting base film including a plurality of diffusing cavities formed in one surface of the base film to diffuse light entering the base film and a light-condensing pattern with a plurality of light-condensing protrusions formed in the surface between adjacent diffusing cavities so as to condense incident light,
- wherein each of the plurality of light-condensing protrusions has two or more oblique light-condensing surfaces which are not parallel to each other,
- wherein the plurality of diffusing cavities are arranged in a first direction and a second direction with a given distance from each other, and the first direction is substantially perpendicular to the second direction, wherein each of the diffusing cavities have a hemispherical curved surface and the diameter of the diffusing cavities is greater than the width of the light-condensing protrusions, wherein the diffusing cavities has a ratio of a diameter to a depth ranging from 1:0.05 to 1:5.
A backlight unit having an optical element for condensing or diffusing light which is incident from a light source through a light guide plate comprising:
- the optical element includes a light-transmitting base film including a plurality of diffusing structures formed in one surface of the base film to diffuse light entering the base film and a light-condensing pattern with a plurality of light-condensing protrusions formed in the surface between adjacent diffusing cavities so as to condense incident light,
- wherein each of the plurality of light-condensing protrusions has two or more oblique light-condensing surfaces which are not parallel to each other
- wherein the plurality of diffusing cavities are arranged in a first direction and a second direction with a given distance from each other and the first direction is substantially perpendicular to the second direction, wherein each of the diffusing cavities have a hemispherical curved surface and the diameter of the diffusing cavities is greater than the width of the light-condensing protrusions, wherein the diffusing cavities has a ratio of a diameter to a depth ranging from 1:0.05 to 1:5.
A liquid crystal display having an optical element for condensing or diffusing light which is incident from a light source through a light guide plate comprising:
- the optical element includes a light-transmitting base film including a plurality of diffusing cavities formed in one surface of the base film to diffuse light entering the base film and a light-condensing pattern with a plurality of light-condensing protrusions formed in the surface between adjacent diffusing cavities so as to condense incident light,
- wherein each of the plurality of light-condensing protrusions has two or more oblique light-condensing surfaces which are not parallel to each other,
- wherein the plurality of diffusing cavities are arranged in a first direction and a second direction with a given distance from each other and the first direction is substantially perpendicular to the second direction, wherein each of the diffusing cavities have a hemispherical curved surface and the diameter of the diffusing cavities is greater than the width of the light-condensing protrusions, wherein the diffusing cavities has a ratio of a diameter to a depth ranging from 1:0.05 to 1:5.
Dependencies are inferred from the claim text.