A Study on Strength Evaluation of LCD Glass for Drop test

액정 디스플레이(LCD) 낙하 충격해석에 관한 연구

  • Published : 2007.10.01

Abstract

As the structure of a mobile phone becomes thin to catch up with a slim product trend, the reliability of a LCD module is on the rise as a big issue for a product design. A drop test is the most basic and important verification method for a mechanical quality control but it requires much time and cost during a product development process. Thus many manufacturers have considered design guide lines using CAE and simulation for more effective usage of limited resources on the market. In this paper, the Maximum Principle Stress of a LCD glass panel is calculated on the basis of explicit FE Analyses method and input conditions are determined according to the general test standard. The design guideline for reliability improvements are suggested on the basis of the results of FE Analysis.

Keywords

References

  1. Park, S. H., Lee, B. Y. and Earmme, Y. Y., 'Analysis on the Fracture of a Panel Glass in a Liquid Crystal Display Module under Mechanical Shock,' J. KSPE, Vol. 17, No. 12, pp. 76-81, 2000
  2. Choi, S. S. and Lee, J. G., 'Structural Design Review of LCD-TV Module by Impact Analysis,' 4th European LS-DYNA Users Conference, pp. G- II -0 I - G- II -10,2003
  3. Korean Agency for Technology and Standards, 'Shock Testing Procedure for Electric Machines and Equipment,' Korean Industrial Standards (KS C 0905), 2006
  4. Wu, J., Song, G, Yeh, C. P. and Wyatt, K., 'Drop/Impact Simulation and Test Validation of Telecommunication products,' Inter. Society Conference on Thermal Phenomena, pp. 330 -336, 1998
  5. Choi, S. S., Kang, E. and Kim, D. C., 'Drop Impact Simulation for Optimum Design of TFT-LCD,' 5th International LS-DYNA Users Conference, 1998
  6. Kim, H. B. R., 'A Study of case breakage for folder type cellular phone with in case of opened and closed,' PAM Users Conference in Korea, HANPAM 2004, Session A, 2004
  7. Kim, Y. J., Koo, J. C., Moon, S. I. and Kim Y. J., 'Simplified Impact Analysis Based on Equivalent Static Analysis for Impact Design of TFT-LCD Panels,' Key Engineering Materials, Vols. 270-273, pp.1l4-1l9,2004
  8. ESI GROUP, '$PAM-CRASH^{TM}$ $PAM-SAFE^{TM}$ 2005 Solver Notes Manual,' ESI GROUP, 2005
  9. ESI GROUP, '$PAM-CRASH^{TM}$ $PAM-SAFE^{TM}$ 2005 Solver Reference Manual,' ESI GROUP, 2005
  10. Wu, J., Song, G, Yeh, C. P. and Wyatt, K., 'Drop/Impact Simulation and Test Validation in Motorola,' 5th International LS-DYNA Users Conference, 1998
  11. Kim, J. G, Lee, J. Y. and Lee, S. Y., 'Drop/Impact Simulation and Experimental Verification of Mobile Phone,' Transactions of the Korean Society of Mechanical Engineers A, Vol. 25, No.4, pp. 695-702, 2001
  12. Takada, S. and Musha, A., 'Mobile-phone Structural Design Technology,' MITSUBISHI ELECTRIC ADVANCE, Vol. 102, pp. 18-20,2003
  13. Lim, C. T., Teo, Y. M. and Shim, V. P. W., 'Numerical Simulation of the Drop Impact Response of a Portable Electronic Product,' IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES, Vol. 25, No.3, pp. 478-485, 2002 https://doi.org/10.1109/TCAPT.2002.803652