Optical sheets

An optical sheet and light diffusion technology, applied in the field of optical sheets, can solve problems such as light loss, and achieve the effects of reducing light loss, preventing brightness, and reducing contact

Inactive Publication Date: 2010-01-27
KOLON IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this example has a disadvantage because the effective diffusion of light is limited, and the light passing through the interface of the diffusing particles must first pass through the substrate layer before reaching the prism layer, so that light loss still occurs.

Method used

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  • Optical sheets
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0074] A binder resin having a refractive index of 1.50 was prepared by diluting 100 parts by weight of acrylic resin (52-666 available from Aekyung Chemical Company) with 70 parts by weight of methyl ethyl ketone and 50 parts by weight of toluene , then based on the weight of the binder resin, the average particle size is 20 μm and spherical polymethyl methacrylate particles (MH20F sold by Kolon Company) with a refractive index of 1.50, mixed in an amount of 110 parts by weight, Then use a milling machine to perform a monodisperse treatment in the form of a single layer, and then use a gravure coater to coat it on an ultra-transparent polyethylene terephthalate with a thickness of 188 μm as a transparent substrate layer. On one surface of a film (FHSS available from Kolon Corporation), it was then cured at 120C for 60 seconds, thereby forming a light-diffusing layer (refractive index 1.50) with a dry thickness of 25 μm.

[0075] In addition, on one surface of the cured light-...

example 2

[0077] Except that a prism layer having a nonlinear triangular prism and a refractive index of 1.53 was formed on one surface of the light diffusion layer, an optical composite film was manufactured in the same manner as Example 1.

example 3

[0079] An optical composite film was manufactured in the same manner as in Example 1 except that the light-diffusing particles were dispersed in a multi-layered form during the formation of the light-diffusing layer. As for this light diffusion layer, its thickness is 30 to 35 μm, and its refractive index is 1.50.

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PUM

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Abstract

The invention discloses an optical sheet for use in liquid crystal displays, which simultaneously functions to uniformly diffuse light emitted from a light guide plate and a diffusion plate and to increase brightness, decreases the loss of light, and enables the fabrication of thinner liquid crystal displays.

Description

technical field [0001] The invention relates to an optical sheet for a liquid crystal display. Background technique [0002] As the modern industrial society develops towards a highly developed information age, the importance of electronic displays as a medium for displaying and transmitting various information is increasing. In the past, bulky CRTs (Cathode Ray Tubes, cathode ray tubes) were widely used, but from the perspective of the space required for installation, they faced considerable limitations, so it was difficult to manufacture large-sized CRTs. As a result, CRTs are today being replaced by various flat panel displays, including liquid crystal displays (LCDs), plasma displays (PDPs), field emission displays (FEDs), and organic electroluminescent displays. In particular, among these flat panel displays, LCD, a technology-intensive product resulting from the combination of liquid crystal-semiconductor technology, has advantages due to its thinness and low power co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02
CPCG02B5/0231G02B5/0242G02B5/045G02B6/0036G02B6/0053G02B6/0061G02F1/133606G02F1/133611G02B1/14G02F1/133607
Inventor 金庆男金炫廷金尚均金炫辰朴钟旼姜忠锡
Owner KOLON IND INC
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