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A kind of optical diffusion film and its preparation method and a kind of liquid crystal display device

A technology of optical diffusion and diffusion of particles, applied in optics, nonlinear optics, instruments, etc., to achieve good diffusion and brightness enhancement, simple process, good light transmission and scratch resistance.

Active Publication Date: 2014-10-29
XIANGSHAN JIZHI NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem that the existing optical film cannot be used for light enhancement and light diffusion at the same time, and to cope with the continuous development and update of the flat panel display industry, the present invention provides an optical diffusion film and its preparation method and a liquid crystal display device. The film has good diffusivity and brightness enhancement, and at the same time, its covering, light transmission and scratch resistance are also good, and its comprehensive performance is superior

Method used

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  • A kind of optical diffusion film and its preparation method and a kind of liquid crystal display device
  • A kind of optical diffusion film and its preparation method and a kind of liquid crystal display device
  • A kind of optical diffusion film and its preparation method and a kind of liquid crystal display device

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preparation example Construction

[0053] The present invention also provides a preparation method of the above-mentioned optical diffusion film, comprising the following steps:

[0054] (1) The upper diffusion particles and adhesive used in the upper diffusion coating are formulated into the upper diffusion glue coating, and an appropriate amount of solvent can be added to adjust the viscosity of the glue coating to facilitate the coating process. In a dust-free environment, corona treatment is carried out on the surface of the transparent substrate, and the upper diffusion glue coating prepared by mixing is coated on the corona surface of the above substrate;

[0055] (2) Transfer the coated substrate obtained in step (1) to dry in a gradient oven, the oven temperature is 80°C-125°C, and wind up;

[0056] (3) Send the rolled film obtained in step (2) into the drying room for curing for 48 hours, and the curing temperature is 50-60°C;

[0057] (4) The lower diffusion particles and adhesive used in the lower d...

Embodiment 1

[0067] The optical diffusion film is prepared according to the above method, wherein, the upper diffusion particles are polymethyl methacrylate, the weight accounts for 50% of the upper diffusion coating, and its shape is spherical or triangular pyramid, and the particle size of the spherical upper diffusion particles is The diameter is 10-20um, the particle diameter of the circumscribed circle of the diffusion particles on the triangular pyramid is 12um, and the refractive index of the diffusion particles is 1.49; 0.5% of the upper diffusion particle, its shape is spherical or ellipsoid, the particle diameter of the lower diffusion particle of the sphere is 8-10um, the long diameter of the lower diffusion particle of the ellipsoid is 8um, and the short diameter is 5um. The refractive index of the diffusing particles is 1.39. The properties of the obtained optical diffusion film are listed in Table 1.

Embodiment 2

[0069] Prepare the optical diffusion film according to the above method, wherein, the upper diffusion particle is a combination of polymethyl methacrylate and polyethylene, the weight is 80% of the upper diffusion coating, and its shape is hemispherical or triangular pyramid. The particle diameter of the diffused particles on the hemispherical shape is 20-30um, the particle diameter of the circumscribed circle of the diffused particles on the triangular pyramid is 15um, and the refractive index of the diffused particles on the described upper is 1.59 and 1.74; Styrene, weight is 20% of upper diffusion particle, and its shape is spherical or triangular pyramid, and the particle diameter of described spherical lower diffusion particle is 10um, and the particle diameter of the circumscribed circle of described triangular pyramid lower diffusion particle is 12um, The refractive index of the lower diffusing particles is 1.49; the properties of the obtained optical diffusing film are...

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Abstract

The invention relates to the technical field of optical barriers, in particular to an optical diffusion barrier and a preparation method thereof, and a liquid crystal display device. In order to solve the problem that the traditional optical barrier can not be used for light intensifying and light diffusion at the same time, the invention provides an optical diffusion barrier with excellent comprehensive properties and a preparation method of the optical diffusion barrier, and a liquid crystal display device. The optical diffusion barrier comprises a transparent substrate, wherein an upper diffusion coating is arranged on the upper surface of the transparent substrate, a lower diffusion coating is arranged on the lower surface of the transparent substrate, the upper diffusion coating comprises an upper diffusion rubber layer and upper diffusion particles, and the lower diffusion coating comprises a lower diffusion rubber coating and lower diffusion particles. The optical diffusion barrier provided by the invention has better diffusion property and brightening property, and better shielding property, light transmitting property and scratch resistance. The preparation method has a simple process, and is easy to operate. The liquid crystal display device using the diffusion barrier has better brightness and picture display effect.

Description

technical field [0001] The invention relates to the technical field of optical thin films, in particular to an optical diffusion film, a preparation method thereof, and a liquid crystal display device. Background technique [0002] At present, flat panel displays mainly include TFT-LCD thin film transistor liquid crystal displays, PDP plasma displays and rear projection displays. As Japan, South Korea and China Taiwan are actively investing in the R&D, production and adoption of large-scale production equipment for TFT-LCD displays, the price of LCD displays continues to decline as the quality of LCD displays continues to improve, thus driving the growth of LCD displays. demand, so that TFT-LCD displays have become the mainstream of flat panel displays. Domestic enterprises are also constantly expanding and developing the TFT-LCD display industry. [0003] The LCD panel itself cannot emit light, and the backlight module needs to provide the light source for the display. Ge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/02G02B5/04G02F1/13357
Inventor 张彦
Owner XIANGSHAN JIZHI NEW MATERIAL CO LTD
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