Abstract
This study designs and implements a novel lighting chip with tunable radiation pattern. The lighting chip consists of polymer-dispersed liquid crystal (PDLC) microprism array, LED, and Si-carrier. The PDLC-microprism array, implemented using the micromachining processes, has been reported for the first time. By integrating the characteristics of microprism and the scattering/transmitting modes of PDLC, the PDLC-microprism enables the tuning of radiation pattern of the transmitted light by input voltage. In short, the lighting chip with PDLC-microprism has the following advantages, (1) no moving parts are required to tune the radiation pattern, (2) the shape of PDLC-microprism array can be easily changed by micro molding processes, and (3) the fabrication and packaging are performed at low temperature and the damage of PDLC during processes is prevented.