Assessment of surface damage characteristics of polymeric optical sheets of LCD backlight unit

Dong Gap Shin; Chang Lae Kim; Do Young Wang; Hae Jin Kim; Kyoung Rae Noh; Dae Sung Son; Oleksiy V. Penkov; Dae Eun Kim

doi:10.1016/j.polymertesting.2015.10.008

Assessment of surface damage characteristics of polymeric optical sheets of LCD backlight unit

Dong Gap Shin, Chang Lae Kim, Do Young Wang, Hae Jin Kim, Kyoung Rae Noh, Dae Sung Son, Oleksiy V. Penkov, Dae Eun Kim

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The backlight unit of a liquid crystal display (LCD) consists of a set of vertically stacked polymeric optical sheets that may experience sliding motion when subjected to vibration. In this work, the surface damage characteristics of the optical sheets were assessed by conducting sliding tests between specimens sampled from the sheets. Surface morphology and hardness of the sheets were also measured using surface characterization tools. It was found that friction coefficient between the polarization film of the LCD panel and dual brightness enhanced film (DBEF) was the highest with a value of ∼0.35. Also, DBEF and diffusion plate suffered the most amount of surface damage. Based on the results of the wear tests, wear maps were constructed from which the relative degree of surface damage could be identified. It was determined that the friction and wear behavior of the polymeric sheets were influenced significantly by their surface morphology and hardness.

Original language	English
Pages (from-to)	140-150
Number of pages	11
Journal	Polymer Testing
Volume	48
DOIs	https://doi.org/10.1016/j.polymertesting.2015.10.008
Publication status	Published - 2015 Dec 1

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2010–0018289 ).

Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.

All Science Journal Classification (ASJC) codes

Organic Chemistry
Polymers and Plastics

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10.1016/j.polymertesting.2015.10.008

Cite this

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title = "Assessment of surface damage characteristics of polymeric optical sheets of LCD backlight unit",

abstract = "The backlight unit of a liquid crystal display (LCD) consists of a set of vertically stacked polymeric optical sheets that may experience sliding motion when subjected to vibration. In this work, the surface damage characteristics of the optical sheets were assessed by conducting sliding tests between specimens sampled from the sheets. Surface morphology and hardness of the sheets were also measured using surface characterization tools. It was found that friction coefficient between the polarization film of the LCD panel and dual brightness enhanced film (DBEF) was the highest with a value of ∼0.35. Also, DBEF and diffusion plate suffered the most amount of surface damage. Based on the results of the wear tests, wear maps were constructed from which the relative degree of surface damage could be identified. It was determined that the friction and wear behavior of the polymeric sheets were influenced significantly by their surface morphology and hardness.",

author = "Shin, {Dong Gap} and Kim, {Chang Lae} and Wang, {Do Young} and Kim, {Hae Jin} and Noh, {Kyoung Rae} and Son, {Dae Sung} and Penkov, {Oleksiy V.} and Kim, {Dae Eun}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2010–0018289 ). Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd. All rights reserved.",

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doi = "10.1016/j.polymertesting.2015.10.008",

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AU - Shin, Dong Gap

AU - Kim, Chang Lae

AU - Wang, Do Young

AU - Kim, Hae Jin

AU - Noh, Kyoung Rae

AU - Son, Dae Sung

AU - Penkov, Oleksiy V.

AU - Kim, Dae Eun

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (No. 2010–0018289 ). Publisher Copyright: © 2015 Elsevier Ltd. All rights reserved.

PY - 2015/12/1

Y1 - 2015/12/1

N2 - The backlight unit of a liquid crystal display (LCD) consists of a set of vertically stacked polymeric optical sheets that may experience sliding motion when subjected to vibration. In this work, the surface damage characteristics of the optical sheets were assessed by conducting sliding tests between specimens sampled from the sheets. Surface morphology and hardness of the sheets were also measured using surface characterization tools. It was found that friction coefficient between the polarization film of the LCD panel and dual brightness enhanced film (DBEF) was the highest with a value of ∼0.35. Also, DBEF and diffusion plate suffered the most amount of surface damage. Based on the results of the wear tests, wear maps were constructed from which the relative degree of surface damage could be identified. It was determined that the friction and wear behavior of the polymeric sheets were influenced significantly by their surface morphology and hardness.

AB - The backlight unit of a liquid crystal display (LCD) consists of a set of vertically stacked polymeric optical sheets that may experience sliding motion when subjected to vibration. In this work, the surface damage characteristics of the optical sheets were assessed by conducting sliding tests between specimens sampled from the sheets. Surface morphology and hardness of the sheets were also measured using surface characterization tools. It was found that friction coefficient between the polarization film of the LCD panel and dual brightness enhanced film (DBEF) was the highest with a value of ∼0.35. Also, DBEF and diffusion plate suffered the most amount of surface damage. Based on the results of the wear tests, wear maps were constructed from which the relative degree of surface damage could be identified. It was determined that the friction and wear behavior of the polymeric sheets were influenced significantly by their surface morphology and hardness.

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VL - 48

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JO - Polymer Testing

JF - Polymer Testing

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Assessment of surface damage characteristics of polymeric optical sheets of LCD backlight unit

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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