Patent ID: 8950884
Filing Date: 2015-02-10
Classification: G02F

Abstract:
1. A display backlight comprising a plurality of discrete light sources spaced from a diffuser, the sources being arranged as sets, each of at least some of which comprises a plurality of the sources, cooperating with a mirror structure which surrounds the set to form a region, the regions being arranged as a two-dimensional array which substantially tessellates the area of the backlight, each mirror structure comprising a plurality of mirror segments, of curved concave cross-section in a plane substantially perpendicular to the diffuser, extending from around the sources of the set towards the diffuser, the edges of adjacent mirror segments of adjacent regions meeting at a meeting line with all of the meeting lines being at the diffuser or between the diffuser and the sources, wherein the plurality of mirror segments is at least three mirror segments, wherein the light sources in different regions are arranged in a non-regular pattern, and the light sources are white light emitting light sources, and the regions comprise a first set of regions and a second set of regions, wherein the first set of regions has a different configuration of light sources as compared to the second set of regions.