Asymmetric light diffuser and methods for manufacturing the same
First Claim
1. A method for manufacturing an asymmetric light diffuser, comprising:
- forming a surface structure of a plate mold or a roll on a substrate'"'"'s surface by a roll-to-roll extrusion process, wherein the substrate is formed by polymer material blended with transparent diffusing beads; and
performing a stretch process for stretching the substrate and a plurality of transparent beads in the substrate, so as to form a deformation of surface micro-structure;
wherein the substrate or the inside transparent beads has a refraction or an alignment, and a birefringence characteristic after the stretch process.
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Accused Products
Abstract
Asymmetric light diffuser and the methods for manufacturing the same are provided. The diffuser is preferably a transparent film made by a stress-stretch process. Particularly, a substrate doped with variant beads is formed as an anisotropic film layer after the stress-stretch process, so that the characteristics with birefringence and diffusion are incorporated. Further the asymmetric relief structure is formed on the surface of substrate by means of extrusion or co-extrusion process. A uniform light and anisotropic refraction can be formed through the diffuser, and even the partial polarization scattering can be formed due to the asymmetric refraction. The preferred embodiment of the diffuser includes a first step of preparing the mold for forming the basic surface structure of the asymmetric diffuser. Further, the substrate with surface micro-structure is formed by a roll-to-roll process. After that, the inside variant refractions and structure deformation are formed under the stress-stretch process.
27 Citations
20 Claims
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1. A method for manufacturing an asymmetric light diffuser, comprising:
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forming a surface structure of a plate mold or a roll on a substrate'"'"'s surface by a roll-to-roll extrusion process, wherein the substrate is formed by polymer material blended with transparent diffusing beads; and performing a stretch process for stretching the substrate and a plurality of transparent beads in the substrate, so as to form a deformation of surface micro-structure; wherein the substrate or the inside transparent beads has a refraction or an alignment, and a birefringence characteristic after the stretch process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for manufacturing an asymmetric light diffuser, by which a light diffuser with characteristics of birefringence and asymmetric diffusion is manufactured, comprising:
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preparing a plate mold or a roll, wherein surface of the plate mold or the roll has relief structure, so as to make a mold required to form the surface structure of the asymmetric light diffuser; providing a substrate blended with a plurality of transparent beads; performing a roll-to-roll process to form the surface structure of the mold on the substrate through plural sets of rolls having surface micro-structure; and performing a stretch process to form a deformation due to the substrate and the inside transparent beads subject to the variant stresses. wherein the substrate has refraction or structure alignment, and the characteristic of birefringence after the substrate or the inside transparent beads is stretched. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An asymmetric light diffuser, comprising:
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a transparent high-polymer substrate; a plurality of transparent diffusing beads, which are blended in the substrate as manufacturing the diffuser; and single or double surfaces with asymmetric relief structure of the diffuser; wherein the light diffuser with polymer substrate blended with transparent diffusing beads has relief structure surface under a stretch process, and the surface structure has asymmetric and non-axisymmetric diffusion characteristics. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification