Development of High-Efficiency and Crack-Free Grinding Process for Chamfering of LCD Glass Edge

Abstract

Glass panels are one of core components in liquid crystal displays (LCDs). Grinding is an essential edge chamfering process in the preparation of LCD glass panel. With the size of glass panel increasing, both high productivity and high quality are required in the edge chamfering process. However, surface and subsurface defects are usually introduced to the chamfered glass edge under high-efficiency grinding conditions. In this work, we explored to develop crack-free grinding process while maintaining high chamfering efficiency with two designed diamond wheels for the chamfering of LCD glass edges. The grinding performance was compared and analyzed in terms of surface roughness and morphology. Normal and tangential grinding forces were measured to characterize the material removal characteristics. It was found that crack-free grinding/chamfering of LCD glass edge was achieved under high-efficiency grinding conditions i.e. wheel speed of 52.3 m/s, feed rate of 10 m/min, depth of cut of 50 μm. The developed grinding process is potential to reduce subsequent polishing time and cost or even replace subsequent polishing process for the preparation of LCD glass edge.