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Optical film

A technology for optical films and cutting tools, applied in the field of optical films

Inactive Publication Date: 2013-05-22
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, overlapping multilayer optical films in displays can lead to visible defects caused by wetting and / or moiré effects

Method used

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Embodiment Construction

[0041] In the description of the embodiments shown below, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration various embodiments in which the invention may be practiced. It is to be understood that other embodiments may be utilized and structural or functional modifications may be made without departing from the scope of the present invention.

[0042] The use of films in displays is well known. For example, in backlit displays, brightness enhancement films use prismatic structures to direct light along the viewing axis to increase the brightness of the light perceived by a viewer. As yet another example, backlit computer display screens can use many different films in order to produce a screen with high contrast and high overall brightness while maintaining high uniform brightness in some selected directions and lower brightness in other directions . Such screens can use several types of films, including dif...

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Abstract

Optical films having anti-Moiré and anti-wetout features are described, along with systems and methods for making these optical films. A master used to make optical films is formed using a single axis actuator cutting along a trajectory that is out of plane with the surface of the master. Movement of the cutting tool along the trajectory cuts grooves having variable depth and variable pitch into the surface. Prisms formed from the master have variable depth, variable height prisms that provide anti-wetout and anti-Moiré features.

Description

technical field [0001] The present invention relates to optical films having anti-moiré and anti-wetout characteristics and systems and methods of making optical films having anti-moiré and anti-wetout characteristics. Background technique [0002] Optical films with prism structures are used to improve display appearance. Display devices can use several different types of films to enhance display brightness by directing light from the display light source along a preferred viewing angle. [0003] Optical films add desirable display properties such as brightness and contrast, but can also introduce undesirable properties. For example, overlapping multilayer optical films in displays can lead to visible defects caused by wetting and / or moiré effects. [0004] There is a need for optical films that increase desirable properties such as brightness and contrast while reducing artifacts that distract the viewer. The present invention fulfills these and other needs and provides...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D11/00
CPCB29C59/002G02B5/045G02B6/0065G02B5/0221G02B6/0038G02B5/0231B26D3/06G02B5/0268B29D11/0074G02B5/0278B29D11/00798Y10T83/0304
Inventor 戴尔·L·埃内斯马克·E·加迪纳艾伦·B·坎贝尔
Owner 3M INNOVATIVE PROPERTIES CO