Luminance enhancement optical substrates with anti-chatter structures
First Claim
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1. A luminance enhancement substrate, comprising:
- a support layer having a top surface; and
an optical substrate, having a planar light input surface at one side of the optical substrate, and a structured light output surface at an opposite side of the optical substrate defining a plurality of peaks and valleys defined by longitudinal prisms in the structured light output surface, wherein the light input surface is adhered to the top surface of the support layer, and wherein the distance of the plurality of valleys from the top surface varies across the optical substrate.
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Abstract
An optical substrate possesses a structured surface that enhances luminance or brightness and reduces chatter phenomenon. A structured surface is provided, in which some of the valleys (low valleys) are coplanar to the surface of the underlying support layer and other valleys (high valleys) are not coplanar on the support layer. The low valleys have bottom thickness that is substantially smaller than that of the high valleys. The distance from the valleys to the support layer remains substantially similar for a first number of adjacent valleys, but is substantially zero for a second number of adjacent valleys after every n-th adjacent valleys.
45 Citations
21 Claims
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1. A luminance enhancement substrate, comprising:
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a support layer having a top surface; and an optical substrate, having a planar light input surface at one side of the optical substrate, and a structured light output surface at an opposite side of the optical substrate defining a plurality of peaks and valleys defined by longitudinal prisms in the structured light output surface, wherein the light input surface is adhered to the top surface of the support layer, and wherein the distance of the plurality of valleys from the top surface varies across the optical substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 21)
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10. A luminance enhancement substrate, comprising:
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a support layer having a top surface; and an optical substrate, having a planar light input surface at one side of the optical substrate, and a structured light output surface at an opposite side of the optical substrate defining a plurality of peaks and valleys, wherein the light input surface is adhered to the top surface of the support layer, and wherein the distance of the plurality of valleys from the top surface varies across the optical substrate, wherein some of the valleys are substantially coplanar with the top surface of the support layer, and other valleys are not coplanar with said coplanar valleys, wherein said coplanar valleys are spaced in a periodic manner across the valleys in the structured surface, and wherein said coplanar valleys are spaced after every first number of adjacent valleys, wherein the first number of adjacent valleys is non-zero. - View Dependent Claims (11)
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16. A method of making a luminance enhancement substrate, comprising:
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providing a support layer having a top surface; adhering a light input surface on one side of an optical substrate layer on the top surface; forming a structured light output surface comprising longitudinal prisms at an opposite side of the optical substrate to define a plurality of peaks and valleys, wherein the distance of the plurality of valleys from the top surface varies across the optical substrate. - View Dependent Claims (17, 18, 19, 20)
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Specification