Light diffusion member

A technology of light diffusion and assembly, applied in the direction of optical elements, optics, diffusing elements, etc., can solve the problems of accelerated expansion, difficult heat dissipation, and reduced concealment.

Inactive Publication Date: 2010-11-10
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, if it is a humid environment, the diffusion component will be as Figure 5 Curved as shown, after storing the BLU in a relatively humid environment, and then lighting the BLU, it will be subject to air expansion due to heat from the lamp, and relative moisture due to the adjoining sheet blocking moisture evaporation. The effect of expansion, but these are phenomena that disappear with time after lighting up, especially when the BLU is a thin structure, it is not easy to dissipate heat and the expansion speed is accelerated, so the sheets laminated on the light diffusion component are also bent together, As a result, the central part contacts the liquid crystal panel to produce spots like egg-shaped water ripples (Egg Mura), and there is a problem that the concealment is reduced

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0078]Using a single-screw extrusion molding machine with a diameter of 135 mm and 60 mm, polycarbonate resin pellets are co-extruded at 220 ° C, so that the overall thickness of the light diffusion component is 1.5 mm, and the spacing is 300 μm and the height b is passed through a patterned roller. is 130 μm, the inclination angle α is 40°, the curvature k is 0.21, and the length a of the base of the second section 1 that is in contact with the base material layer 10 1 75 μm, the length a of the base of the first section 2 that is in contact with the base material layer 10 2 150µm, thus forming as figure 2 The unit structure of the form shown is a line of structural layers.

[0079] Then, on the other surface of the base layer, a 50-μm-thick bottom layer co-extruded with a styrene-butadiene copolymer resin was formed to manufacture a light-diffusing module.

Embodiment 2

[0081] Except for the difference that polyvinylidene fluoride resin (poly vinylidenedifluoride, PVDF) is used to co-extrude the bottom surface layer in the above-mentioned embodiment 1, the other methods are used to manufacture the light diffusion assembly according to the same method.

Embodiment 3

[0083] Except that no structural layer was formed in the above-mentioned embodiment 1, the light diffusion assembly was manufactured in the same manner.

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Abstract

The present invention provides an light diffusion assembly for minimizing expansion difference between a surface close to a light source and a surface not close to the light source so as to prevent a central part from bending forwards. Thereby, the light diffusion assembly of a better embodiment includes a substrate layer and a bottom surface layer formed on at least one surface of the substrate layer, wherein the thermal expansion coefficient of the bottom surface layer is more than 5.0*10<-5>.

Description

technical field [0001] The invention relates to a light diffusion component for a liquid crystal display (Liquid Crystal Display, LCD). Background technique [0002] As the industrial society develops into the advanced information age, the importance of electronic displays is increasing as a medium for displaying and conveying various information. The cathode ray tube (CathodeRay Tube, CRT), which was widely used in the past, was difficult to enlarge due to the relatively large limitation on the installation space, so it was used by LCD, plasma display panel (plasma display panel, PDP), field emission display (field emission display, FED ) and various flat-panel displays such as organic electroluminescent displays. Among these flat-panel displays, LCD is an integrated device that combines liquid crystal and semiconductor technology. Due to its advantages of thinness, lightness, and low power consumption, research and development of its structure and manufacturing technology...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02F1/13357B32B27/08
CPCG02B5/0215G02B5/0231B32B27/08B32B2307/21B29C48/08
Inventor 李宰勋崔官民杜俊吉
Owner KOLON IND INC
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