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Diffusion sheet and preparation method thereof

A diffusion sheet and diffusion layer technology, applied in optics, instruments, nonlinear optics, etc., can solve the problem of damage to sensitive components of liquid crystal displays, and achieve the effect of reducing resistivity

Inactive Publication Date: 2017-06-20
NANJING CEC PANDA LCD TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

like figure 1 As shown, the existing diffusion sheet usually includes a diffusion layer, a transparent substrate layer and a protective layer, and the diffusion layer and the protective layer only contain diffusion particles or protective particles, resulting in the existing diffusion sheet being incompatible with light guide plates and other optical films. When the sheets are in contact, during the vibration process, there will be friction between the diffusion sheet and the material it is in contact with to generate a large amount of static electricity. After the static electricity accumulates to a certain extent, it will be released quickly to generate a high voltage of more than several thousand volts, which will damage the LCD. Sensitive components in

Method used

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  • Diffusion sheet and preparation method thereof
  • Diffusion sheet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 2 As shown, a diffusion sheet includes a diffusion layer 2, a transparent substrate layer 1 and a protective layer 3 arranged in sequence (that is, the diffusion layer 2 and the protective layer 3 are respectively located on both sides of the transparent substrate layer 1), and the transparent substrate The material layer 1 is provided with a first surface and a second surface opposite to each other;

[0029] The diffusion layer 2 includes a first adhesive 22, a plurality of diffusion particles 21 and a plurality of first conductive particles 23, and the diffusion particles 21 and the first conductive particles 23 are bonded on the first adhesive 22. On the first surface of the transparent substrate layer 1 , at least one first conductive particle 23 is arranged between two adjacent diffusion particles 21 , and the diameter of the diffusion particle 21 is larger than the diameter of the first conductive particle 23 . In this embodiment, a plurality of f...

Embodiment 2

[0037] A method for preparing a diffusion sheet, comprising:

[0038] Step 1. Prepare the diffusion layer coating solution: add the first adhesive 22, the diffusion particles 21, and the first conductive particles 23 in sequence, stir evenly, and adjust to the set viscosity;

[0039] Step 2. Prepare the diffusion layer 2: apply the diffusion layer coating solution prepared in step 1 on the first surface of the transparent substrate layer 1, and put it into an oven at 50°C-200°C for aging for 1-10 hours. The first surface of the substrate layer 1 forms a diffusion layer 2;

[0040] Step 3, preparing the protective layer coating solution: adding the second adhesive 32, the protective particles 31, and the second conductive particles 33 in sequence, stirring evenly, and adjusting to a set viscosity;

[0041] Step 4, prepare the protective layer 3, apply the protective layer coating solution prepared in step 3 on the second surface of the transparent substrate layer 1, and add it...

Embodiment 3

[0044] A backlight module, the backlight module includes a diffusion sheet, and the diffusion sheet is the diffusion sheet described in Embodiment 1 or the diffusion sheet prepared according to the preparation method of the diffusion sheet described in Embodiment 2 .

[0045] In summary:

[0046] The present invention increases the conductive particles in the diffusion layer and the protective layer, so that the surface of the diffusion sheet forms a conductive layer, thereby reducing the resistivity of the surface of the diffusion sheet. Since the speed of charge leakage is inversely proportional to the resistance value of the surface of the diffusion sheet, it can The static charge generated on the surface due to friction and other reasons can be quickly leaked, effectively preventing the static charge from being accumulated and quickly released to damage the sensitive components in the liquid crystal display module to which the diffusion sheet of the present invention is ap...

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Abstract

The invention discloses a diffusion sheet and a preparation method thereof, comprising a diffusion layer, a transparent substrate layer and a protective layer arranged in sequence, the transparent substrate layer is provided with a first surface and a second surface oppositely arranged, the diffusion layer comprising a first adhesive, a plurality of diffusion particles and a plurality of first conductive particles, the diffusion particles and the first conductive particles are bonded to the first surface of the transparent substrate layer through the first adhesive; the The protective layer includes a second adhesive, a plurality of protective particles, and a plurality of second conductive particles, and the protective particles and the second conductive particles are bonded to the second surface of the transparent substrate layer through the second adhesive. In the present invention, conductive particles are added in the diffusion layer and the protective layer, so that the surface of the diffusion sheet forms a conductive layer, thereby reducing the resistivity of the surface of the diffusion sheet, and rapidly leaking static charges generated on the surface due to friction and the like.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display module optical films, and in particular relates to a diffusion sheet and a preparation method thereof. Background technique [0002] Liquid crystal display module, including liquid crystal display screen and backlight module, the backlight module contains one or more light sources, one reflector, one light guide plate, one or more diffusers, one or more light enhancing film (or without the enhancement film), a plastic frame and a back plate and other components. Such as figure 1 As shown, the existing diffusion sheet usually includes a diffusion layer, a transparent substrate layer and a protective layer, and the diffusion layer and the protective layer only contain diffusion particles or protective particles, resulting in the existing diffusion sheet being incompatible with light guide plates and other optical films. When the sheets are in contact, during the vibration process, t...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02F1/13357
CPCG02B5/0205G02B5/0278G02F1/133606G02F2202/22
Inventor 倪明明
Owner NANJING CEC PANDA LCD TECH
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