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公开(公告)号：US11822158B2
公开(公告)日：2023-11-21
申请号：US18182329
申请日：2023-03-11
发明人： Kenneth L. Walker , Bing Shen , Matthew K. Pope
IPC分类号： G02F1/13357 , G02F1/1335
CPC分类号： G02F1/133606 , G02F1/133603 , G02F1/133611 , G02F1/133607 , G02F1/133614
摘要： A back light unit includes an array of LEDs positioned in rows and columns that emit light from a top surface. A light splitting optical film includes a plurality of inverted pyramids positioned on a first side facing the top surface of the array where each of the plurality of inverted pyramids forms an apex oriented in a direction away from the top surface of the array. A plurality of linear prisms is positioned in a parallel configuration on a second side facing away from the top surface of the array where at least some of the linear prisms form an apex being oriented such that a direction of the apex forms a desired angle with respect to a direction of a row of the array of light emitting diodes.
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公开(公告)号：US20230079565A1
公开(公告)日：2023-03-16
申请号：US17985839
申请日：2022-11-12
IPC分类号： G02F1/13357 , G02F1/1335
摘要： An optical film for a back light unit that includes an array of light emitting diodes. The optical film includes a substrate, and a plurality of regions of spatially modulated microstructures on at least one side of the substrate. The spatially modulated microstructures have different sizes and/or shapes configured to create a gradient structure within each region. The gradient structure within each region is constructed and arranged to cause more spreading of light when positioned directly above an individual light emitting diode and less spreading of light at locations not directly above an individual light emitting diode. Within the back light unit, the gradient structure converts light beams emitted by the respective light emitting diode at different angles into a more uniform and higher on-axis luminance upon exiting the back light unit.
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公开(公告)号：US11520182B2
公开(公告)日：2022-12-06
申请号：US17418825
申请日：2019-12-27
发明人： Kenneth L. Walker , Juhyun J. Lee
IPC分类号： G02F1/00 , G02F1/13357 , G02F1/1335 , H01L33/50
摘要： A color conversion film for a backlight unit that includes an array of light emitting diodes. The color conversion film includes a substantially planar base portion, and a plurality of three-dimensional structures extending from the substantially planar base portion. Each of the three-dimensional structures has at least one sloped surface with a base angle of about 55°-75° relative to the substantially planar base portion. The color conversion film includes a material having a refractive index of about 1.5-1.7.
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4.发明申请公开(公告)号：US20220307672A1
公开(公告)日：2022-09-29
申请号：US17841713
申请日：2022-06-16
发明人： Bing SHEN , Ken G. PURCHASE , Thomas A. RINEHART , John W. WILSON
IPC分类号： F21V5/00
摘要： A light transmissive substrate for transforming a Lambertian light distribution into a batwing light distribution. The light transmissive substrate includes a first surface comprising a plurality of microstructures, and a second surface on a side of the substrate opposite the first surface. The substrate is configured to receive light in a Lambertian distribution from a light source at the first surface and transform the light into a batwing distribution exiting the second surface. The batwing distribution having a peak intensity at about ±30° to about ±60° from X and Y axes, and a minimum intensity at nadir.
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公开(公告)号：US20230273479A1
公开(公告)日：2023-08-31
申请号：US18310877
申请日：2023-05-02
发明人： Kenneth L. Walker , Bing Shen , Matthew K. Pope
IPC分类号： G02F1/13357 , F21V8/00 , G02F1/1335
CPC分类号： G02F1/133603 , G02B6/0011 , G02F1/133615 , G02F1/133607 , G02F1/133524
摘要： An edge-lit back light unit for a backlit display includes a reflector, an edge-lit light guide film, a diffuser film, and a pair of crossed brightness enhancement films with increased efficiency. The diffuser film has an angular light distribution output that is matched to light acceptance angles of the pair of crossed brightness enhancement films to provide increased on-axis brightness without having to increase power to the edge-lit back light unit.
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6.发明公开公开(公告)号：US20230243482A1
公开(公告)日：2023-08-03
申请号：US18297880
申请日：2023-04-10
发明人： Bing SHEN , Ken G. PURCHASE , Thomas A. RINEHART , John W. WILSON
IPC分类号： F21V5/00
CPC分类号： F21V5/005 , F21Y2115/10
摘要： A light transmissive substrate for transforming a Lambertian light distribution into a batwing light distribution. The light transmissive substrate includes a first surface comprising a plurality of microstructures, and a second surface on a side of the substrate opposite the first surface. The substrate is configured to receive light in a Lambertian distribution from a light source at the first surface and transform the light into a batwing distribution exiting the second surface. The batwing distribution having a peak intensity at about ±30° to about ±60° from X and Y axes, and a minimum intensity at nadir.
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公开(公告)号：US11531232B2
公开(公告)日：2022-12-20
申请号：US17155393
申请日：2021-01-22
IPC分类号： G02F1/00 , G02F1/13357 , G02F1/1335
摘要： An optical film for a back light unit that includes an array of light emitting diodes. The optical film includes a substrate, and a plurality of regions of spatially modulated microstructures on at least one side of the substrate. The spatially modulated microstructures have different sizes and/or shapes configured to create a gradient structure within each region. The gradient structure within each region is constructed and arranged to cause more spreading of light when positioned directly above an individual light emitting diode and less spreading of light at locations not directly above an individual light emitting diode. Within the back light unit, the gradient structure converts light beams emitted by the respective light emitting diode at different angles into a more uniform and higher on-axis luminance upon exiting the back light unit.
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公开(公告)号：US20220197086A1
公开(公告)日：2022-06-23
申请号：US17553170
申请日：2021-12-16
发明人： Kenneth L. Walker , Bing A. Shen , Matthew K. Pope
IPC分类号： G02F1/13357 , F21V8/00 , G02F1/1335
摘要： An edge-lit back light unit for a backlit display includes a reflector, an edge-lit light guide film, a diffuser film, and a pair of crossed brightness enhancement films with increased efficiency. The diffuser film has an angular light distribution output that is matched to light acceptance angles of the pair of crossed brightness enhancement films to provide increased on-axis brightness without having to increase power to the edge-lit back light unit.
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公开(公告)号：US11181776B2
公开(公告)日：2021-11-23
申请号：US17015780
申请日：2020-09-09
发明人： Kenneth L. Walker , Bing Shen , Matthew K. Pope
IPC分类号： G02F1/13357 , G02F1/1335
摘要： A back light unit includes an array of light emitting diodes, at least two optical films positioned above the array of light emitting diodes, and a pair of brightness enhancement films positioned above the at least two optical films. A majority of the optical films are light splitting optical films having a plurality of light splitting microstructures on at least one surface thereof.
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公开(公告)号：US11906842B2
公开(公告)日：2024-02-20
申请号：US17985839
申请日：2022-11-12
IPC分类号： G02F1/00 , G02F1/13357 , G02F1/1335
CPC分类号： G02F1/133603 , G02F1/133607
摘要： An optical film for a back light unit that includes an array of light emitting diodes. The optical film includes a substrate, and a plurality of regions of spatially modulated microstructures on at least one side of the substrate. The spatially modulated microstructures have different sizes and/or shapes configured to create a gradient structure within each region. The gradient structure within each region is constructed and arranged to cause more spreading of light when positioned directly above an individual light emitting diode and less spreading of light at locations not directly above an individual light emitting diode. Within the back light unit, the gradient structure converts light beams emitted by the respective light emitting diode at different angles into a more uniform and higher on-axis luminance upon exiting the back light unit.
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