AMLCD glass mirror constant and crack flaw size in non-crack LCD panels

Figures & data

Figure 1. Crack branches with high and low stress.

Figure 2. Fracture surface I (mirror radius (R) = 95.265 µm; fracture stress = 194.52 MPa).

Figure 3. Fracture surface II (mirror radius (R) = 39.595 µm; fracture stress = 301.72 MPa).

Figure 4. Fracture surface III (mirror radius (R) = 21.095 µm; fracture stress = 413.37 MPa).

Figure 5. Four-probe bend test.

Table 1. Measurement and calculation results according to the ball drop test.

Crack flaw (mm)	Mirror radius (mm)	Fracture stress (MPa)	Mirror constant (MPa·mm^0.5)
0.0015	0.0052	831.379	60.038
0.0034	0.0180	447.248	60.038
0.0056	0.0286	355.012	60.038
0.0104	0.0216	408.554	60.038
0.0132	0.0400	300.059	60.038
0.0134	0.0363	315.096	60.038
0.0179	0.0630	239.169	60.038
0.0186	0.0396	301.721	60.038
0.0227	0.0775	215.732	60.038
0.0330	0.0953	194.518	60.038

Figure 6. Four-probe bend test results.

Figure 7. Ball drop test.

Figure 8. Ball drop test results: crack flaw vs. mirror radius.

Figure 9. Ball drop test results: crack flaw vs. fracture stress.