Apparatus for producing uniform luminance in a flat-panel display backlight

摘要

The present invention features apparatus for uniformly distributing luminance from a back light module for a flat panel, liquid crystal display (LCD). Luminance uniformity, high efficiency and long lamp life are achieved by distributing the lamp cathode thermal energy and maintaining uniform lamp wall temperatures. A heat sink is attached to the fluorescent lamps in the cathode areas, providing cooler operating temperatures at the lamp ends. A thermal sensor is also mounted in the heat sink body. In addition, open louver slots positioned behind the lamps allow for cool air to enter behind each lamp. The size, shape and position of these louvers can be selected so that the lamp temperatures are essentially constant over their entire length.