• 자원리싸이클링
• /
• 제24권1호
• /
• pp.58-65
• /
• 2015

국내 디스플레이 산업의 핵심기술과 글로벌 점유율은 세계 최고 수준이지만 폐 디스플레이의 재활용 관련한 전반적 기술은 매우 미흡하고 폐 디스플레이의 유리소재는 전량 매립하고 있는 실정이다. 본 논문에서는 폐 초박막 액정표시장치(Thin Film Transistor Liquid Crystal Display) 유리를 고강도 콘크리트 파일 및 발포체의 원료로 재활용 하는 연구, 초박막 액정표시장치 제조 공정에서 발생하는 불량품인 파유리를 장섬유 및 단섬유 등으로 재활용 하는 연구 동향에 대하여 조사하였다. 폐유리를 재활용한 원료 성분은 고강도 콘크리트 파일과 발포체 원료로 재료 재활용이 가능한 것으로 입증되었으며 특히 콘크리트 파일의 경우 기존 제품보다 향상된 특성을 나타내었다. 이외에도 파유리를 장섬유나 단섬유로 재활용 하는 기술은 이미 상용화 단계에 있으므로 향후 폐 디스플레이 유리 소재의 상용화 재활용 시스템을 구축할 수 있는 기술을 확립하는 방향으로 연구를 진행할 필요가 있다.

• 한국소음진동공학회논문집
• /
• 제14권10호
• /
• pp.945-954
• /
• 2004

Recently, specifications of flat display module is going to be higher definition, brightness and more wide viewing angle. On the other hand, physical thickness of those modules is forced to be slimmer and lighter. The flat display modules such as plasma or TFT-LCD employ thin crystallized panels that are normally weak to high level transient mechanical energy inputs. As a result, anti-shock performance is one of the most important design specifications of TFT-LCD modules. TFT-LCD module manufacturers and their customers like PC or TV makers perform a series of strict impact/drop test for the modules. However most of the large display module designs are generated based on engineer's own trial-error experiences. Those designs may result in disqualification from the drop/impact test during final product evaluation. A rigorous study on the impact failure of the displays is of course necessitated in order to avoid the problems. In this article, a systematic design evaluation is presented with combinations of FEM modeling and testing to support the optimal shock proof display design procedure.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2005년도 춘계학술대회 논문집
• /
• pp.489-493
• /
• 2005

TFT-LCD(Thin Film Transistor Liquid Crystal Display) module is representative commercial product of FPD(Flat Panel Display). Thickness of TFT-LCD module is very thin. It is adopted for major display unit for IT devices such as Cellular Phone, Camcorder, Digital camera and etc. Due to the harsh user environment of mobile IT devices, it requires complicated structure and tight assembly. And user requirements for the mechanical functionalities of TFT-LCD module become more strict. However, TFT-LCD module is normally weak to high level transient mechanical shock. Since it uses thin crystallized panel. Therefore, anti-shock performance is classified as one of the most important design specifications. Traditionally, the product reliability against mechanical shock is confirmed by empirical method in the design-prototype-drop/impact testredesign paradigm. The method is time-consuming and expensive process. It lacks scientific insight and quantitative evaluation. In this article, a systematic design evaluation of TFT-LCD module for mobile IT devices is presented with combinations of FEA and testing to support the optimal shock proof display design procedure.

• 한국정밀공학회지
• /
• 제22권3호
• /
• pp.115-122
• /
• 2005

As the digital TV markets rapidly growing, many manufacturers introduce large size flat screen TV units. There are two different display types available to large size models which are plasma and TFT-LCD. Since both are constructed with thin large panels that are mostly fragile to even moderate mechanical shock inputs. Some large size panels are severely resonated by the acoustic sound generated TV which deteriorates video quality. Recognizing the potential problems of large displays, accurate measurement of the panels is to be an essential task for the reliable design. Measurement of mechanical properties of a thin large crystallized panel such as TFT-LCD display with traditional material testing equipments is challenging. Since TFT-LCDs are constructed with combination of brittle glass panels, polymer sheets, and liquid crystal, their properties are not only anisotropic but also usually non-linear. Accurate measurement of the properties often requires very expensive facilities. Especially when the size of the test sample is as large as 40-inch or wider, direct measurement cost is prohibitive. Even worse, machining of the large TFT-LCD to make a smaller size specimen that could be fit into a material tester is not possible because of liquid crystal leakage. A new method fer the measurement of elastic modulus of large TFT-LCD panel is presented in this article. The suggested method provides a simple, economic, and user-friendly way fer measuring the elastic modulus of large panels with considerable level of accuracy.