Investigation of the failure of a liquid crystal display panel under mechanical shock

Abstract

A new method linking experimental and theoretical approaches is proposed to precisely analyse the failure of liquid crystal display (LCD) panels under mechanical drop. Generally, the thickness of a glass plate for LCD panel is less than 0.7 mm, and thus requires sufficient strength to withstand mechanical shock. In the present work, the fracture toughness (K IC ) of panel glass obtained experimentally is compared with the stress-intensity factor (K I ) calculated using the maximum stress at weak points via a finite-element drop simulation in order to evaluate crack growth on the panel. It is demonstrated that this approach is simple but effective to determine the specification of components at the design level, including the roughness of glass panel edges. Furthermore, from a dynamic simulation, important information related to the shockproof design of an LCD panel is gathered.

Virtual prototyping of drop test using explicit analysis

“…The numerical simulations are also very useful in design since they allow the influence of modifications and different parameters to be assessed, directly, without spending time on prototype manufacturing. [3,4,5,7,8] Explicit dynamics analysis follows next major steps, described below and shown graphically on figure 1:…”

Experimental and Analytical Study of Free-Fall Drop Impact Testing of Portable Products

“…[3,4]), LCD's (e.g. [5]) or PCB's (notably [6]). Publications involving full products are more scarce: e.g.…”