Light scattering slice and preparation method thereof

A technology of a light diffusing sheet and a manufacturing method, which is applied to optics, optomechanical equipment, nonlinear optics, etc., can solve the problems of uneven coating of the diffusing film, decreased efficiency, decreased light transmittance, etc., and achieves convenient and reliable manufacturing process. , soft and comfortable light, flexible processing technology

Inactive Publication Date: 2008-07-30
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the uneven coating of the material, the diffusion film cannot fully achieve uniform light diffusion
Another major disadvantage of the coating method is that since different materials (such as synthetic resins) are used for the diffusion film base material, adhesive, and diffusion particles, it is easy to cause deformation or discoloration (yell

Method used

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  • Light scattering slice and preparation method thereof
  • Light scattering slice and preparation method thereof
  • Light scattering slice and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] Embodiment one: referring to Figures 1 to 5, (1) making an imprinting mold core with at least one microlens structure;

[0043] (2) Set the computer imprinting control program, imprinting parameters and graphic files;

[0044] (3) Using micro-nano thermal imprinting or ultraviolet imprinting, the imprinting mold core in step (1) is imprinted on the substrate to be imprinted according to the imprinting parameters and graphic files in step (2). At the first embossing working position of the substrate, the substrate has a corresponding number of concave microlenses;

[0045] (4) According to the imprinting parameters, change the relative position of the imprinting mold core and the substrate to be imprinted to the next imprinting work position;

[0046] (5) Repeat steps (3) and (4) until all stamping procedures are completed.

[0047] As shown in FIG. 2, the imprinting mold core 21 has a hemispherical shape, and the diffusion sheet substrate 22 to be imprinted is placed on a w...

Example Embodiment

[0059] Embodiment two: referring to Figure 6, (1) making an imprint mold core with at least one microlens structure;

[0060] (2) Set computer imprinting control program and parameter graphic file;

[0061] (3) Using micro-nano thermal imprinting or ultraviolet imprinting, the imprinting mold core in step (1) is imprinted on the substrate to be imprinted according to the control program and graphic file in step (2) At the first embossing working position, the base material has a corresponding number of concave microlenses;

[0062] (4) According to the control program, change the relative position of the imprinting mold core and the substrate to be imprinted to the next imprinting work position;

[0063] (5) Repeat steps (3) and (4) until all stamping procedures are completed.

[0064] In this embodiment, the imprint mold core 21 is composed of a plurality of microlens structures arranged in a 6×6 array combination, and methods for realizing the preset microlens arrangement struct...

Example Embodiment

[0067] Embodiment 3: Referring to Figures 7-9, (1) Making an imprinting mold core with at least one microlens structure;

[0068] (2) Set computer imprinting control program and parameter graphic file;

[0069] (3) Using micro-nano thermal imprinting or ultraviolet imprinting, the imprinting mold core in step (1) is imprinted on the substrate to be imprinted according to the control program and graphic file in step (2) At the first embossing working position, the base material has a corresponding number of concave microlenses;

[0070] (4) According to the control program, change the relative position of the imprinting mold core and the substrate to be imprinted to the next imprinting work position;

[0071] (5) Repeat steps (3) and (4) until all stamping procedures are completed.

[0072] (6) Use the printing result in step (5) as a master, and transfer it to a metal plate through a precision electroforming process to obtain an imprint template 62;

[0073] (7) The imprint templa...

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Abstract

The invention discloses a method for manufacturing light diffusion sheets. The invention is characterized in that the method comprises the following steps of (1) manufacturing an imprint die core with at least one microlens structure; (2) designing computer-based imprint control programs, imprint parameters and pattern files; (3) imprinting the die core of the step (1) on a substrate to be imprinted in a first imprint work position according to the control programs and the pattern files of the step (2), by using hot nanoimprint or ultraviolet-imprint lithography, to obtain the relevant number of concave micro-lenses on the substrate; (4) chaining the position of the imprint die core relative to the imprinted substrate according to the imprint parameters until the next imprint work position; (5) repeating the steps (3) and (4) until all the imprint procedures are completed. The invention can directly imprint concave micro-lenses on the substrate by hot nanoimprint or ultraviolet-imprint lithography, allows the light dispersion layer to be integrated with the substrate as a whole, avoids the problems of unstable adhesion, poor diffusion effect due to the difference in thermal expansion coefficient and physical deformation, and efficiently improves the performance of light diffusion sheets.

Description

technical field [0001] The invention relates to a light diffusion sheet and a manufacturing method thereof, which are suitable for a backlight module of a liquid crystal display device and also for a projection screen based on a light diffusion sheet structure. Background technique [0002] Today's liquid crystal display devices mostly use backlight lighting from the back of the liquid crystal panel, and there are backlight devices such as side light and vertical backlight. Taking the backlight module for side-light lighting for notebooks as an example, as shown in Figure 1, it has: a lamp tube 1, which is semiconductor lighting or cold light source lighting, and is in the form of a line as a light source; a reflector 2; a light guide plate 17, It is in the shape of a square plate; the lower light diffusion film 4 has a transparent substrate 14 , the bottom has an anti-adhesive material 13 , and the top has diffusion particles 15 ; the prism grid f...

Claims

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Application Information

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IPC IPC(8): G03F7/00G02B5/02G02F1/13357G02F1/1335
Inventor 申溯陈林森周雷张恒解正东魏国军
Owner SUZHOU UNIV
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