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Optical diffusion barrier with high haze and high brightness and liquid crystal display backlight source using optical diffusion barrier

A technology of optical diffusion and high brightness, applied in the field of optical diffuser film and liquid crystal display backlight, it can solve the problems of limited light-gathering ability and covering ability of thin film, and achieve high haze and brightness, high light-gathering ability and haze, and less combination. The effect of the number of pieces

Active Publication Date: 2012-06-20
HEFEI LUCKY SCI & TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this design, since only a few larger particles protrude from the coating, and smaller particles are buried in the coating, the light-gathering and hiding capabilities of this film are very limited.

Method used

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  • Optical diffusion barrier with high haze and high brightness and liquid crystal display backlight source using optical diffusion barrier
  • Optical diffusion barrier with high haze and high brightness and liquid crystal display backlight source using optical diffusion barrier
  • Optical diffusion barrier with high haze and high brightness and liquid crystal display backlight source using optical diffusion barrier

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: as figure 2 As shown, the optical diffusion film 100 mainly includes a transparent PET substrate 110 , a diffusion coating 120 including round PMMA diffusion particles 140 and an anti-adhesion coating 130 including round PMMA anti-adhesion particles 150 . In a specific embodiment, the diffusion particles in the diffusion layer 120 are combined according to the proportions in Table 1, the large-particle diffusion film particles are closely arranged together, and the small-particle diffusion particles are dispersed and filled in the diffusion coating 120. The difference in refractive index between the diffusing particles and the substrate and resin coating scatters light. The thickness of the diffusion layer 120 is strictly controlled to be 1 / 2 of the particle size of the large-particle diffusion particles 140 inside, and half of the large-particle diffusion particles 140 are buried in the diffusion coating 120 , and the other half is exposed on the diffusion ...

Embodiment 2

[0022] Example 2: as figure 2 As shown, the optical diffusion film 100 mainly includes a transparent PET substrate 110 , a diffusion coating 120 including round PMMA diffusion particles 140 and an anti-adhesion coating 130 including round PMMA anti-adhesion particles 150 . In a specific embodiment, the diffusion particles in the diffusion layer 120 are combined according to the proportions in Table 2, the large-particle diffusion film particles are closely arranged together, the small-particle diffusion particles are dispersed and filled in the diffusion coating 120, and the small particles are used The difference in refractive index between the diffusing particles and the substrate and resin coating scatters light. The thickness of the diffusion layer 120 is strictly controlled to be 1 / 2 of the particle size of the large-particle diffusion particles 140 inside, and half of the large-particle diffusion particles 140 are buried in the diffusion coating 120 , and the other half...

Embodiment 3

[0025] Example 3: as figure 2As shown, the optical diffusion film 100 mainly includes a transparent PET substrate 110 , a diffusion coating 120 including round PMMA diffusion particles 140 and an anti-adhesion coating 130 including round PMMA anti-adhesion particles 150 . In a specific embodiment, the diffusion particles in the diffusion layer 120 are combined according to the proportions in Table 3, the large particles of the diffusion film are closely arranged and arranged together, the small particles of the diffusion particles are dispersed and filled in the diffusion coating 120, and the small particles are used The difference in refractive index between the diffusing particles and the substrate and resin coating scatters light. The thickness of the diffusion layer 120 is strictly controlled to be 1 / 2 of the particle size of the large-particle diffusion particles 140 inside, and half of the large-particle diffusion particles 140 are buried in the diffusion coating 120 , ...

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Abstract

The invention relates to an optical diffusion barrier with high haze and brightness and a liquid crystal display backlight source using the optical diffusion barrier. A diffusion particle consists of particles with two particle diameters, the large-diameter particles are mutually and tightly in contact and distributed on the surface of a base material, the small-diameter particles are filled in gaps among the large-diameter particles, and the diffusion particles comprise spherical particles with the following particle diameters in percentage by weight: 82-92% of spherical particles with the particle diameter of 15-30 microns, and 8-18% of spherical particles with the particle diameter of 0.5-6 microns; and the geometric diameter proportion of the large-diameter particles to the small-diameter particles is within 5 / 1-30 / 1, and the thickness of a diffusion coating is 5 / 10-6 / 10 of the maximum diameter of the diffusion particles. The optical diffusion barrier disclosed by the invention has higher haze and light condensation capability by controlling the particle diameters and the proportion of the two kinds of diffusion particles and controlling the thickness of the diffusion coating; in addition, the liquid crystal display backlight source manufactured by the optical diffusion barrier, disclosed by the invention, has very higher haze and brightness.

Description

technical field [0001] The invention relates to an optical diffuser film with high haze and high brightness and a liquid crystal display backlight using the optical diffuser film. Background technique [0002] Existing optical diffusion films are widely used in liquid crystal display backlights, advertising light boxes, lighting fixtures, buttons of mobile communication equipment and other devices that require light sources to provide uniform illumination. In recent years, the rapid development of LCD backlight sources and the wide application in mobile communication equipment displays, notebook computer monitors, desktop computer monitors and large-size LCD TVs have increased the performance requirements of optical diffusion films in backlight sources, mainly focusing on improving brightness. and lighting uniformity. [0003] figure 1 It is a schematic structural diagram of a traditional optical diffusion film produced by coating. The optical diffusion film mainly include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/13357F21S8/00
Inventor 朱业建霍新莉
Owner HEFEI LUCKY SCI & TECH IND
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