Abstract

The ring-on-ring test is one of the most popular surface strength testing methods used to test LCD panels. This paper uses finite element analysis to show that a panel behaves like two independent pieces of glass during a ring-on-ring test. The epoxy region where the color filter and thin-film transistor (TFT) glasses are glued together does not affect the stress at the center. As LCD panels get thinner, the contribution of membrane stress increases significantly. Because the color filter and TFT glasses act independently, they experience maximum principal stresses within 15% of each other. For deflections greater than one-half (sometimes one-fourth) the glass thickness, the stresses are not uniform inside the load ring, requiring finite element analysis to obtain an accurate stress distribution.

© 2013 IEEE

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  29. G. P. Toshihiko Ono, S. T. Gulati, "A simple correction to thin panel strength value as calculated from 4-point bend test," Int. Display Workshops (IDW) .
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  31. M.-H. Lin, C.-H. Hsieh, K.-F. Huang, "Strength of LCD panel during bending," SID Symp. Dig. Tech. Papers (2010) pp. 1069-1072.
  32. S. Garner, G. Merz, G. S. Glaesemann, J. Tosch, C. Chang, D. Marshall, "Ultra-slim flexible glass substrates for display applications," SID Symp. Dig. Tech. Papers (2012) pp. 342-344.
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2013 (1)

2011 (2)

S. T. Gulati, J. D. Helfinstine, "Edge strength testing of thin glasses," Int. J. Appl. Glass Sci. 2, 39-46 (2011).

G. Pe?anac, T. Bause, J. Malzbender, "Ring-on-ring testing of thin, curved bi-layered materials," J. Eur. Ceramic Soc. 31, 2037-2042 (2011) 10/15/.

2010 (1)

X. Nie, W. W. Chen, D. W. Templeton, "Dynamic ring-on-ring equibiaxial flexural strength of borosilicate glass," Int. J. Appl. Ceramic Technol. 7, 616-624 (2010).

2007 (3)

T. Fett, G. Rizzi, E. Ernst, R. Müller, R. Oberacker, "A 3-balls-on-3-balls strength test for ceramic disks," J. Eur. Ceramic Soc. 27, 1-12 (2007).

T. Fett, G. Rizzi, J. P. Guin, S. M. Wiederhorn, "Ring-on-ring strength measurements on rectangular glass slides," J. Mater. Sci. 42, 393-395 (2007).

M.-C. Pan, P.-C. Chen, "Drop simulation/experimental verification and shock resistance improvement of TFT-LCD monitors," Microelectron. Rel. 47, 2249-2259 (2007) 12//.

2005 (1)

C. H. Hsueh, M. J. Lance, M. K. Ferber, "Stress distributions in thin bilayer discs subjected to ball-on-ring tests," J. Amer. Ceramic Soc. 88, 1687-1690 (2005).

2004 (1)

S. T. Gulati, J. F. Bayne, W. R. Powell, J. D. Helfinstine, "Mirror constant for AMLCD glass," Amer. Ceramic Soc. Bull. 83, 14-15 (2004).

2002 (1)

A. Börger, P. Supancic, R. Danzer, "The ball on three balls test for strength testing of brittle discs: Stress distribution in the disc," J. Eur. Ceramic Soc. 22, 1425-1436 (2002).

2001 (1)

A. K. D. A. Seal, M. Banerjee, A. K. Mukhopadhyay, K. K. Phani, "Mechanical properties of very thin cover slip glass disk," Bull. Mater. Sci. 24, 151-155 (2001).

1999 (1)

A. Simpatico, W. R. Cannon, M. J. Matthewson, "Comparison of hydraulic-burst and ball-on-ring tests for measuring biaxial strength," J. Amer. Ceramic Soc. 82, 2737-2744 (1999).

1991 (1)

M. Inoue, Y. Takizawa, A. Okada, "Non-linear flexure testing of a high-strength glass disk," Int. J. Solids Structures 28, 1185-1197 (1991).

1990 (1)

W. A. Dalgliesh, D. A. Taylor, "The strength and testing of window glass," Can. J. Civil Eng. 17, 752-762 (1990).

1989 (1)

G. de With, H. H. M. Wagemans, "Ball-on-ring test revisited," J. Amer. Ceramic Soc. 72, 1538-1541 (1989).

1987 (1)

C. Vallabhan, J. Minor, S. Nagalla, "Stresses in layered glass units and monolithic glass plates," J. Struct. Eng. 113, 36-43 (1987).

1985 (1)

R. Behr, J. Minor, M. Linden, C. Vallabhan, "Laminated glass units under uniform lateral pressure," J. Struct. Eng. 111, 1037-1050 (1985).

1965 (1)

C. Phillips, "The strength and weakness of brittle materials," Amer. Scientist 20-51 (1965).

1959 (1)

D. M. M. a. M. E. M. L. P. J. E. Gordon, "On the strength and structure of glass," Proc. Royal Soc. Lond. A 249, 65-72 (1959).

1921 (1)

A. A. Griffith, "The phenomena of rupture and flow in solids," Phil. Trans. Royal Soc. Lond. A, containing papers of a mathematical or physical character221, 163-198 (1921).

Amer. Ceramic Soc. Bull. (1)

S. T. Gulati, J. F. Bayne, W. R. Powell, J. D. Helfinstine, "Mirror constant for AMLCD glass," Amer. Ceramic Soc. Bull. 83, 14-15 (2004).

Amer. Scientist (1)

C. Phillips, "The strength and weakness of brittle materials," Amer. Scientist 20-51 (1965).

Bull. Mater. Sci. (1)

A. K. D. A. Seal, M. Banerjee, A. K. Mukhopadhyay, K. K. Phani, "Mechanical properties of very thin cover slip glass disk," Bull. Mater. Sci. 24, 151-155 (2001).

Can. J. Civil Eng. (1)

W. A. Dalgliesh, D. A. Taylor, "The strength and testing of window glass," Can. J. Civil Eng. 17, 752-762 (1990).

Int. J. Appl. Ceramic Technol. (1)

X. Nie, W. W. Chen, D. W. Templeton, "Dynamic ring-on-ring equibiaxial flexural strength of borosilicate glass," Int. J. Appl. Ceramic Technol. 7, 616-624 (2010).

Int. J. Appl. Glass Sci. (1)

S. T. Gulati, J. D. Helfinstine, "Edge strength testing of thin glasses," Int. J. Appl. Glass Sci. 2, 39-46 (2011).

Int. J. Solids Structures (1)

M. Inoue, Y. Takizawa, A. Okada, "Non-linear flexure testing of a high-strength glass disk," Int. J. Solids Structures 28, 1185-1197 (1991).

J. Amer. Ceramic Soc. (2)

A. Simpatico, W. R. Cannon, M. J. Matthewson, "Comparison of hydraulic-burst and ball-on-ring tests for measuring biaxial strength," J. Amer. Ceramic Soc. 82, 2737-2744 (1999).

C. H. Hsueh, M. J. Lance, M. K. Ferber, "Stress distributions in thin bilayer discs subjected to ball-on-ring tests," J. Amer. Ceramic Soc. 88, 1687-1690 (2005).

J. Amer. Ceramic Soc. (1)

G. de With, H. H. M. Wagemans, "Ball-on-ring test revisited," J. Amer. Ceramic Soc. 72, 1538-1541 (1989).

J. Display Technol. (1)

J. Eur. Ceramic Soc. (3)

T. Fett, G. Rizzi, E. Ernst, R. Müller, R. Oberacker, "A 3-balls-on-3-balls strength test for ceramic disks," J. Eur. Ceramic Soc. 27, 1-12 (2007).

A. Börger, P. Supancic, R. Danzer, "The ball on three balls test for strength testing of brittle discs: Stress distribution in the disc," J. Eur. Ceramic Soc. 22, 1425-1436 (2002).

G. Pe?anac, T. Bause, J. Malzbender, "Ring-on-ring testing of thin, curved bi-layered materials," J. Eur. Ceramic Soc. 31, 2037-2042 (2011) 10/15/.

J. Mater. Sci. (1)

T. Fett, G. Rizzi, J. P. Guin, S. M. Wiederhorn, "Ring-on-ring strength measurements on rectangular glass slides," J. Mater. Sci. 42, 393-395 (2007).

J. Struct. Eng. (2)

R. Behr, J. Minor, M. Linden, C. Vallabhan, "Laminated glass units under uniform lateral pressure," J. Struct. Eng. 111, 1037-1050 (1985).

C. Vallabhan, J. Minor, S. Nagalla, "Stresses in layered glass units and monolithic glass plates," J. Struct. Eng. 113, 36-43 (1987).

Microelectron. Rel. (1)

M.-C. Pan, P.-C. Chen, "Drop simulation/experimental verification and shock resistance improvement of TFT-LCD monitors," Microelectron. Rel. 47, 2249-2259 (2007) 12//.

Phil. Trans. Royal Soc. Lond. (1)

A. A. Griffith, "The phenomena of rupture and flow in solids," Phil. Trans. Royal Soc. Lond. A, containing papers of a mathematical or physical character221, 163-198 (1921).

Proc. Royal Soc. Lond. A (1)

D. M. M. a. M. E. M. L. P. J. E. Gordon, "On the strength and structure of glass," Proc. Royal Soc. Lond. A 249, 65-72 (1959).

Other (18)

A. P. Boresi, R. J. Schmidt, Advanced Mechanics of Materials (Wiley, 1985).

ANSYS User's Manual 14.0 ANSYS, Inc.CanonsburgPAUSA (2011).

S. T. Gulati, J. D. Helfinstine, J. F. Bayne, W. R. Powell, J. C. Lapp, "Mechanical reliability of LCD panels under static loading," SID Symp. Dig. Tech. Papers (2004) pp. 1593-1595.

J. T. Westbrook, J. F. Bayne, S. H. Carley, K. H. Vepakomma, J. S. Kim, S. T. Gulati, "Four point bending of AMLCD panel," SID Symp. Dig. Tech. Papers (2012) pp. 996-997.

J. T. Westbrook, J. F. Bayne, T. A. Roe, J. S. Kim, P.-H. Su, T. Ono, "Strength measurements of thin AMLCD panels," SID Symp. Dig. Tech. Papers (2010) pp. 1073-1076.

G. P. Toshihiko Ono, S. T. Gulati, "A simple correction to thin panel strength value as calculated from 4-point bend test," Int. Display Workshops (IDW) .

S. T. Gulati, J. D. Helfinstine, T. Ono, J. C. Lapp, "Behavior of LCD panel during bending," SID Symp. Dig. Tech. Papers (2007) pp. 1508-1511.

M.-H. Lin, C.-H. Hsieh, K.-F. Huang, "Strength of LCD panel during bending," SID Symp. Dig. Tech. Papers (2010) pp. 1069-1072.

S. Garner, G. Merz, G. S. Glaesemann, J. Tosch, C. Chang, D. Marshall, "Ultra-slim flexible glass substrates for display applications," SID Symp. Dig. Tech. Papers (2012) pp. 342-344.

J. D. Helfinstine, S. T. Gulati, J. F. Bayne, W. R. Powell, J. C. Lapp, "Mechanical reliability of LCD panels under dynamic loading," SID Symp. Dig. Tech. Papers (2004) pp. 1597-1599.

C. Soon-Wan, J. Jae-Woo, O. Seunghee, M. Young-Jun, B. In-Youl, H. Dong-Sool, "Drop reliability of glass panel for LCD," 2011 61st IEEE Electron. Compon. Technol. Conf. (ECTC) pp. 1250-1254.

K. H. Vepakomma, S. Carley, J. Kim, "Finite element analysis of ball drop on LCD panels," SID Symp. Dig. Tech. Papers (2012) pp. 675-678.

S. T. Gulati, J. D. Helfinstine, T. A. Roe, M. L. Hillman, J. C. Lapp, "Biaxial strength of ultrathin AMLCD glass substrates," SID Symp. Dig. Tech. Papers (2002) pp. 49-51.

R. Huet, W. Ming, "LCD display strength: Why edge preparation matters," 2007 Int. Conf. on Portable Inf. Devices pp. 1-4.

S. T. Gulati, J. Westbrook, S. Carley, H. Vepakomma, T. Ono, "Two point bending of thin glass substrate," SID Symp. Dig. Tech. Papers (2011) pp. 652-654.

ASTM“Standard test method for monotonic equibiaxial flexural strength of advanced ceramics at ambient temperature,” (2009).

S. T. Gulati, J. T. Westbrook, K. H. Vepakomma, T. Ono, J. S. Kim, "Overview of strength tests for LCD substrates and panels," Int. Display Workshops (2011).

S. H. Chae, J. H. Zhao, D. R. Edwards, P. S. Ho, "Verification of ball-on-ring test using finite element analysis," 2010 12th IEEE Intersoc. Conf. on Thermal Thermomech.Phenomena in Electron. Syst. (ITherm) pp. 1-6.

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