scope:

This PAS applies to commercially available liquid crystal displays (LCDs). This PAS applies to all LCD types, including transmissive, reflective or transflective LCD modules using either segment, passive or active matrix and achromatic or colour-type LCDs that are equipped with their own integrated source of illumination or without their own source of illumination. The object of this PAS is to establish uniform requirements for accurate and reliable measurements of the following LCD parameters, as defined herein: a) quasistatic strength; b) quasistatic fatigue. The methods described in this PAS apply to all sizes, small and large, of LCDs. Methods for measuring the fatigue constant are described in this PAS and are taken from the referenced literature [13-20]. The primary results are formulae for estimated allowable stress for the specified lifetime or estimated failure rate for the specified stress level. By way of an example, limited data for strength and fatigue behaviour of LCD glass are included in an informative annex to this PAS. Similarly, limited data for the static strength of LCD modules is also included and compared with that of parent glass.