Analysis of thermo-physical and optical properties of a diffuser using PET/PC/PBT copolymer in LCD backlight units

Kim, GeunHyung; Kim, Woo Jun; Kim, Seung Mo; Son, Joon Gon

doi:10.1016/j.displa.2004.11.001

Cited by 67 publications

(32 citation statements)

References 9 publications

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“…A back light unit (BLU), an essential module of TFT-LCD, consists of a light source [such as a cold cathode fluorescent lamp or light-emitting diodes (LEDs)], a light guide plate (LGP), and several optical sheets (e.g., reflector, diffuser, and prism sheets) [1][2][3][4][5][6][7][8][9][10]. Competitive technological development of prism sheets and related parts necessary for BLU has recently become a focus.…”

Section: Introductionmentioning

confidence: 99%

Improvement in the anti-abrasion behavior of a highly refractive optical sheet through the use of modified urethane acrylates

2016

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The back light unit (BLU) is the core component of LCDs for laptops, mobile phones, navigation, large televisions, and public information displays (PIDs). To enhance the optical efficiency of LCDs, optical films with a high reflective index have been used for BLUs. Highly reflective chemicals have been actively investigated to enhance the optical efficiency and mechanical property of BLUs. In this study, urethane acrylates were modified to improve the anti-abrasion behavior of highly refractive materials. Highly refractive modified urethane acrylate (MUA) was synthesized from o-phenylphenol (OPP), polyols, and diisocyanate. The refractive index of ester-based o-phenylphenol urethane acrylates (OPPUAs) was slightly greater than that of ether-based OPPUAs. The difference was due to the electron density increase induced by molecular interactions in the ester polyol, resulting in a higher refractive index. Additionally, urethane acrylate with carbonate polyol showed the highest viscosity. Based on the anti-abrasion test, the weight loss of MUAs with an alkyl group was less than that in OPPUAs with an aromatic group.

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Section: Introductionmentioning

confidence: 99%

Improvement in the anti-abrasion behavior of a highly refractive optical sheet through the use of modified urethane acrylates

2016

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“…Generally, the diffusers can be classified into two types: the particle-diffusing type or the surface-relief type. Particle diffusers rely on the transparent beads inside the plastic films of plates to scatter light [64][65][66]. The distribution of diffusing beads in the diffuser is nonuniform, which affects the performance of diffusion light.…”

Section: Fabricating Optic Diffuser Using Photopolymerizable Holograpmentioning

confidence: 99%

Ionic Liquids in Photopolymerizable Holographic Materials

Lin¹,

Oliveira²

2011

Holograms - Recording Materials and Applications

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“…To ensure brightness uniformity and high luminance, the BLU is composed of several kinds of optical materials, namely a light source, reflective sheet, light guide plate (LGP), diffuser sheet, prism sheet, and a mold frame as shown schematically in Fig. 1 [1][2][3][4][5][6][7][8][9][10][11]. Therefore, high refractive materials play an important role in determining LCD efficiency.…”

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confidence: 99%

Preparation and properties of photocurable, high refractive, 2-naphthol epoxy-modified urethane acrylate

et al. 2011

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The back light unit (BLU) is a core component of liquid crystal displays (LCDs) that are used in notebook computers, mobile phones, navigation devices, flat screen TVs, and public information display (PID) devices, among many others. To enhance the optical efficiency of LCDs, optical films with a high refractive index have been used in the BLU. In particular, high refractive chemicals have been the subject of recent investigations to enhance the optical efficiency of BLUs. In this study, we efficiently synthesized photocurable, high refractive 2-naphthol epoxy-modified urethane acrylate (2-NEUA) from 2-naphthol via a three-step reaction. The refractive index of 2-NEUA was higher than that of 2-naphthol epoxy acrylate (2-NEA), presumably because it contains more integrated aromatic rings and therefore has a higher electron density than 2-NEA. Furthermore, we critically evaluated the effects of 2-NEUA on the mechanical properties of UV curable films in this article.

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Analysis of thermo-physical and optical properties of a diffuser using PET/PC/PBT copolymer in LCD backlight units

Cited by 67 publications

References 9 publications

Improvement in the anti-abrasion behavior of a highly refractive optical sheet through the use of modified urethane acrylates

Improvement in the anti-abrasion behavior of a highly refractive optical sheet through the use of modified urethane acrylates

Ionic Liquids in Photopolymerizable Holographic Materials

Preparation and properties of photocurable, high refractive, 2-naphthol epoxy-modified urethane acrylate

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