Optical element with nanoparticles

A technology of optical components and fine particles, applied in nano optics, optical components, optics, etc., can solve problems such as agglomeration of nanoparticles and decomposition of dispersants

Inactive Publication Date: 2006-06-28
ROHM & HAAS DENMARK FINANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dispersants taught in this patent are likely to degrade at the temperatures used for thermoplastic extrusion, causing agglomeration of nanoparticles and decomposition of the dispersants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0120] In this example, simulations will illustrate that the optical performance of an optical element that collimates light from a backlight is improved when fine particles are incorporated into the polymeric surface features.

[0121] The simulated film is a substrate with surface features in the form of a linear array of triangular prisms. The thickness of the whole film is 155 μm, among which, the thickness of the substrate is 105 μm, and the height of the prism is 50 μm. The simulated matrix was oriented polyester with a refractive index of 1.50. Each prism has a corner angle of 90° and a pitch of 50 μm. The film is typically used to collimate the backlight of liquid crystal displays. Its performance is measured in gain (brightness of film and coaxial backlight divided by brightness of coaxial backlight only). The prisms collimate the light from the backlight and reflect (with total internal reflection) light incident on the film at high angles back. When the linear a...

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PUM

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Abstract

The invention discloses an optical element, which comprises a matrix with surface features on the surface, the Ra of the surface features is 3-200 μm, and contains a dispersion of fine particles with a particle size of less than 100 nm.

Description

field of invention [0001] The present invention relates to a light management film. In a preferred form, the present invention is directed to a light management film comprising a dispersion of fine particles suitable for backlit display applications. Background of the invention [0002] Optical materials and optical articles are very useful for controlling the flow and intensity of light. Examples of useful optical products include optical lenses such as Fresnel lenses, optical fibers, light pipes, optical films including total internal reflection films, retroreflective sheeting, and microscopic replication products such as brightness enhancing films (BEF) and security products. Brightness enhancement films are used in many of today's electronic products to enhance backlit flat panel displays such as liquid crystal displays (LCDs), electroluminescent panels, laptop computer monitors, word processors, desktop monitors, televisions, video recorders and automotive, avionics T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B1/04
CPCG02B1/041G02B1/045B82Y20/00G02B5/02
Inventor C·J·卡明斯基R·P·布尔德莱斯G·C·小欧文
Owner ROHM & HAAS DENMARK FINANCE
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