An effective method for measuring elastic modulus of large TFT-LCD panels

Yun Jae Kim, J. C. Koo, Seong In Moon, Young Jin Kim

Research output: Contribution to journalConference article

Abstract

Measurement of mechanical properties of a thin large crystallized material such as TFT-LCD panel is challenging with traditional material testing equipments. 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 of even elastic modulus is prohibitive. On the other hand, machining of the large TFT-LCD to make a smaller size specimen that could be fit into a material tester is not possible due to leaking liquid crystal. A new method for 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 for measuring the elastic modulus of large panels with considerable level of accuracy. The measured elastic modulus is verified by the combination of part level modal test and analysis, and impact test and analysis at the assembled digital TV level.

Original languageEnglish
Pages (from-to)1767-1772
Number of pages6
JournalKey Engineering Materials
Volume270-273
Issue numberIII
Publication statusPublished - 2004
EventProceedings of the 11th Asian Pacific Conference on Nondestructive Testing - Jeju Island, Korea, Republic of
Duration: 2003 Nov 32003 Nov 7

Keywords

  • Elastic Modulus
  • Impact
  • TFT-LCD

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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