Imprinted micro-louver structure

a micro-louver and imprinting technology, applied in the field of micro-louver structures, can solve the problems of difficult to make large micro-louver sheets, difficult to achieve large-scale micro-louver sheets, and limited methods in the depth they can achieve, etc., to achieve the effect of improving transparency, reducing viewing angle, weight, thickness and cos

Inactive Publication Date: 2015-04-23
EASTMAN KODAK CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]There is a need therefore for micro-louver structures and manufacturing methods

Problems solved by technology

These methods are limited in the depth they can achieve since photo-lithographic etching has a practical depth limitation or the patterns available are limited to those that can support etching.
Furthermore, photo-lithographic processes are relatively

Method used

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  • Imprinted micro-louver structure
  • Imprinted micro-louver structure
  • Imprinted micro-louver structure

Examples

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Embodiment Construction

[0029]The present invention is directed to micro-louvers formed in sheets. In an embodiment of the present invention illustrated in FIG. 1, a micro-louver structure 5 includes a cured layer 20 on a surface 15, for example the surface 15 of a substrate 10. The cured layer 20 has a plurality of imprinted micro-channels 22 forming a pattern in the cured layer 20. The imprinted micro-channels 22 have a greater depth D than a width W and are spaced apart by a separation distance S greater than the width W of the imprinted micro-channel 22. A cured light-absorbing material 24 is located in the imprinted micro-channels 22. The cured light-absorbing material 24 in the imprinted micro-channels 22 form micro-louvers 23 in the micro-louver sheet 12 including the cured layer 20.

[0030]In an embodiment, the cured layer 20 is formed on the surface 15 of the substrate 10. In another embodiment, the imprinted micro-channels 22 and the cured light-absorbing material 24 extend only partially through t...

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Abstract

A micro-louver structure includes a cured layer on a surface. A plurality of micro-channels forms a pattern in the cured layer. The micro-channels have a greater depth than width and are spaced apart by a separation distance greater than the width. A cured light-absorbing material is located in the micro-channels.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]Reference is made to commonly-assigned U.S. patent application Ser. No. ______ filed concurrently herewith, entitled “Imprinted Micro-Louver Structure Method” by Ronald S. Cok, the disclosure of which is incorporated herein.FIELD OF THE INVENTION[0002]The present invention relates to micro-louver structures.BACKGROUND OF THE INVENTION[0003]Micro-louver structures are widely used for privacy screens to inhibit display viewing at large angles from an angle orthogonal to the display. Micro-louver structures are also useful for rejecting specular illumination of a surface at large angles from an angle orthogonal to the surface. For example, U.S. Pat. No. 5,543,870 describes a rear-projection screen with two crossed films of micro-louver light control material to provide a high degree of blocking of high-intensity light, such as sunlight that can impinge upon the front of the screen. U.S. Patent Application Publication 20090242142 describes a v...

Claims

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Application Information

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IPC IPC(8): G02B5/00G02B1/10G02B27/02E06B9/24
CPCG02B5/003E06B9/24E06B2009/2405G02B27/022G02B1/105Y10T428/24802G02B1/14G02B1/10
Inventor COK, RONALD STEVEN
Owner EASTMAN KODAK CO
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