Forming method of polarizing sheet and retarding sheet with continuously changed shaft

A polarizer and retarder technology, applied in optics, shading screens, nonlinear optics, etc., can solve the problems of blocked full-window view and lack of effectiveness of glass polishing methods, and achieve the effect of balanced view

Active Publication Date: 2019-05-14
THE HONG KONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of mechanism that controls how much light can pass through it without causing any issues like dark bands or unevenness when used properly makes sure everything looks good at all times for users who want more privacy while still being able to see things clearly even if they are looking around them from different angles.

Problems solved by technology

Technologies relating to current techniques for controllably adjusting the transmitted brightness of displays include continuous variation of voltage levels within certain ranges, use of reflective materials like metal mirrors, and switching between specific states based on the position of the display elements themselves. Additionally, existing solutions involving fixed polarizable zones may cause issues with interference caused by adjacent dark sections.

Method used

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  • Forming method of polarizing sheet and retarding sheet with continuously changed shaft
  • Forming method of polarizing sheet and retarding sheet with continuously changed shaft
  • Forming method of polarizing sheet and retarding sheet with continuously changed shaft

Examples

Experimental program
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Effect test

Embodiment 1

[0110] see Figure 6 In Embodiment 1, a photo-alignment layer with a continuously changing alignment direction is formed on the substrate 50 by a continuous scanning method.

[0111] First, a photo-alignment material is coated on the substrate 50 . The substrate 50 coated with the photo-alignment material is placed on the linear moving device, and the side coated with the photo-alignment material faces the exposure light source 80 , wherein the exposure light source 80 can be an ultraviolet or blue light source 80 .

[0112] Between the light source 80 and the substrate 50, a polarizer 90 and a blocking sheet 100 with a slit perpendicular to the direction of movement of the substrate 50 are provided so that the light can pass through the polarizer 90 slit to the substrate 50 in turn. Expose the photo-alignment material on it. It should be noted that the relative positions of the polarizer 90 and the blocking sheet 100 are not limited, that is, the polarizer 90 may be located...

Embodiment 2

[0117] see Figure 7 , in order to obtain a photo-alignment layer with a continuously changing alignment direction, a half-wave retarder can also be used as a replica master for separate exposure, the specific method is as follows.

[0118]First, a photo-alignment material is coated on the substrate 50 . The substrate 50 coated with the photo-alignment material is placed on the linear moving device, and the side coated with the photo-alignment material faces the exposure light source 80, wherein the exposure light source 80 may be an ultraviolet or blue light source.

[0119] Between the exposure light source 80 and the substrate 50, a linear polarizer 120 and a half-wave plate 130 with a continuous axis change are arranged in sequence, so that the light emitted by the light source 80 passes through the linear polarizer 120 and the half-wave plate 130 with an axis change in sequence. The substrate 50 is irradiated to form a continuously changing axis photo-alignment layer. I...

Embodiment 3

[0122] like Figure 8 As shown, it is also possible to use a planar aligned wedge-shaped unit instead of the above-mentioned half-wave plate with continuous axis variation as a master. Wherein, the planar aligned wedge-shaped unit has a spacer 140 and a glass substrate 150 with a photo-alignment layer, wherein liquid crystal molecules are enclosed in the glass substrate 150 . The wedge-shaped unit has a continuously variable unit thickness, so that the phase change introduced on the polarized input light passing through the wedge-shaped unit can be continuously varied, usually requiring 0 to 2π. The specific implementation method is as follows.

[0123] First, a photo-alignment material is coated on the substrate 50 . The substrate 50 coated with the photo-alignment material is placed on the linear moving device, and the side coated with the photo-alignment material faces the exposure light source 80, wherein the exposure light source 80 may be an ultraviolet or blue light s...

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Abstract

The invention discloses a forming method of a polarizing sheet and a retarding sheet with a continuously changed shaft for a window with mechanically controlled variable transparency. The forming method comprises a method of manufacturing an optical orientation layer with continuously changing orientation directions. The method comprises following steps: coating a photo-orientation material on a substrate; placing the substrate on a linear moving device; and exposing the side, which is covered by the photo-orientation material, of the substrate to a light source; wherein light from the light source penetrates a polarizing sheet and reaches the photo-orientation material coated on the substrate, and thus a patterned light orientation layer is formed on the photo-orientation material.

Description

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Claims

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Application Information

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Owner THE HONG KONG UNIV OF SCI & TECH
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