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Duplicated array brightness enhancement film of large-viewing angle micro lens

A micro-replication and micro-lens technology, applied in the fields of lenses, optics, instruments, etc., can solve the problems of unfavorable large-scale promotion, poor optical gain performance, and high manufacturing process requirements

Inactive Publication Date: 2010-06-09
邹竞 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The light emitted by the line light source CCFL and point light source widely used in the backlight is converted into a surface light source ( figure 1 ), the diffusion sheet further optimizes the light output of the surface light source and at the same time shields the dots on the light guide plate, but the light angle after the diffusion sheet is relatively large, and the axial brightness is not enough
To solve the above problems, prism films, reflective polarized light-enhancing films, and diffuser combined optical gain structures are generally used. The manufacturing process of prism films is relatively complicated, and the scratch resistance is poor due to the sharp top structure.
The prism film compresses the light within a certain range in one direction. Generally, two films are required, that is, two prism sheets are combined orthogonally or a combination of one prism sheet and one upper diffusion sheet is required to ensure the light in two directions. Light gain, high cost of use, and the mold required for micro-replication of prisms requires high manufacturing technology, usually using nano-cutting machine tools to process; reflective polarized brightness-enhancing film is too expensive and monopolistic, which is not conducive to large-scale Promotion; diffuser light gain structure, generally use 3 diffusers to superimpose and combine, the thickness of the module increases, and the optical gain performance will be poor

Method used

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  • Duplicated array brightness enhancement film of large-viewing angle micro lens
  • Duplicated array brightness enhancement film of large-viewing angle micro lens
  • Duplicated array brightness enhancement film of large-viewing angle micro lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] [Example 1] Select a 35CrMo seamless steel pipe with a diameter greater than 200 mm. After correcting the dynamic balance, the two ends are equipped with shaft heads to make a hollow shaft, and then the circumferential surface of the hollow shaft is ground on a grinding machine until the surface is rough. The degree Ra0.2 microns, forming a mirror-like circumferential body. Choose a wire mesh whose mesh is slightly smaller than the diameter of the model to be replicated, and PMMA or PS particle balls whose diameter matches the nominal diameter of the model. Other types of organic material particle balls can also be used, and the particle balls can be uniformly adsorbed by electrostatic adsorption. Adsorbed on the surface of the mirror surface, the microspherical particles are tightly wrapped with wire mesh and attached to the cylindrical surface, axially pressed against each other to eliminate the gap between particles, and the number of particles in the wire mesh coatin...

Embodiment 2

[0018] [Example 2] Choose a 0.1mm stainless steel plate, spread the cast particles evenly on the surface of the plate, then cover it with a polyester mesh, press it tightly so that the beads are close to the steel plate, and then soak in the nickel In the phosphorus solution, stop the reaction when the theoretical coating thickness reaches half of the particle diameter. After taking it out, refer to the first method to clean up the remaining particles. The stainless steel plate is crimped and attached to the circular shaft to make a microlens array replication mold.

Embodiment 3

[0019] [Example 3] Mix the molded particles into epoxy resin or other high-strength resins, the particle distribution density is controlled according to calculation, and then the resin is evenly coated on the metal round shaft. The size of D+h / 2 is turned, the remaining particles are taken out, and then electroless metal is plated, and the replica mold is completed.

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PUM

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Abstract

The invention discloses duplication of array brightness enhancement film by a large-viewing angle micro lens and a production method of a duplicating mould. The invention continuously duplicates micro lens array on a film base without birefraction using halogen free and sulphide free resin containing nano particle. On all directions of a horizontal projection, the micro lens array has the function of gathering and condensing view angle to ordinary light or vibration light through utilizing the refraction and reflection of light from high refraction medium to low refraction medium, and the axial brightness can be improved in a larger range of viewing angle. Through using novel hair metal casting technology, the invention provides a mould which can continuously duplicate micro lens array. The invention is used in backlight source module of a liquid crystal display.

Description

technical field [0001] The liquid crystal module is a passive light-emitting display, mainly composed of a liquid crystal panel and a backlight source. The liquid crystal panel itself does not emit light, and an external light source is needed to provide brightness to achieve the purpose of display. This external light source is the backlight source. LED, etc.), light guide plate, optical film (brightness enhancement film, diffuser, polarizer) and other structural parts. The invention is an optical film used in the backlight source of the liquid crystal display to increase the brightness of the liquid crystal display, which is beneficial to improving display indicators such as color saturation of the display, and can simultaneously achieve the purpose of energy saving and efficiency enhancement. Background technique [0002] The light emitted by the line light source CCFL and point light source widely used in the backlight is converted into a surface light source ( figure 1...

Claims

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Application Information

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IPC IPC(8): G02B3/00G02B1/04B23P15/24
Inventor 邹竞缪志强徐嘉睿
Owner 邹竞
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