Turning film having multiple slopes
First Claim
1. A light redirecting article for redirecting light toward a target angle, the light redirecting article comprising:
- (a) an input surface comprising a plurality of light redirecting structures each light redirecting structure having;
(i) a near surface having two slopes, sloping away from normal in one direction as defined by a first inclination base angle β
1, a second inclination angle β
2, and a first half apex angle α
2, for accepting incident illumination over a range of incident angles;
(ii) a far surface sloping away from normal, in the opposite direction relative to the near surface, as defined by a second base angle γ
1 and a second half apex angle α
1; and
(b) an output surface opposing to the input surface wherein the near and far surfaces are opposed to each other at an angle (α
1+α
2) that is in the range from 60 to 70 degrees, and the base angle β
1 is in the range from 82 to 87 degrees.
4 Assignments
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Accused Products
Abstract
The present invention provides a light redirecting article for redirecting light toward a target angle, the light redirecting article comprising: an input surface comprising a plurality of light redirecting structures each light redirecting structure having a near surface having two slopes, sloping away from normal in one direction as defined by a first inclination base angle β1, a second inclination angle β2, and a first half apex angle α2, for accepting incident illumination over a range of incident angles and a far surface sloping away from normal, in the opposite direction relative to the input surface, as defined by a second base angle γ1 and a second half apex angle α1. The invention further provides an output surface opposing to the input surface wherein the near and far surfaces are opposed to each other at an angle (α1+α2) that is in the range from 60 to 70 degrees, and the base angle β1 is in the range from 82 to 87 degrees.
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Citations
5 Claims
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1. A light redirecting article for redirecting light toward a target angle, the light redirecting article comprising:
-
(a) an input surface comprising a plurality of light redirecting structures each light redirecting structure having; (i) a near surface having two slopes, sloping away from normal in one direction as defined by a first inclination base angle β
1, a second inclination angle β
2, and a first half apex angle α
2, for accepting incident illumination over a range of incident angles;(ii) a far surface sloping away from normal, in the opposite direction relative to the near surface, as defined by a second base angle γ
1 and a second half apex angle α
1; and(b) an output surface opposing to the input surface wherein the near and far surfaces are opposed to each other at an angle (α
1+α
2) that is in the range from 60 to 70 degrees, and the base angle β
1 is in the range from 82 to 87 degrees. - View Dependent Claims (2, 3, 4, 5)
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Specification
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- Resources
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Current AssigneeSKC Hi-Tech & Marketing Co., Ltd.
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Original AssigneeSKC Haas Display Films Co., Ltd. (Dow, Inc.)
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InventorsZhu, Xinyu, Mi, Xiang-Dong
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Primary Examiner(s)Shafer; Ricky D
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Application NumberUS11/906,611Publication NumberTime in Patent Office1,343 DaysField of Search359/831, 359/833, 359/837, 362/330, 362/339, 362/620, 362/626US Class Current359/833CPC Class CodesG02B 5/045 Prism arraysG02B 6/0053 Prismatic sheet or layer; B...
