Patent ID: 9081229
Filing Date: 2015-07-14
Classification: F21V,G02F,H01L

Abstract:
1. A surface light source unit comprising: a plurality of point light sources; a bottom plate provided with the point light sources; and a light transmitting/reflecting plate disposed apart from the bottom plate with a predetermined distance therebetween, the point light sources being each arranged at a center portion of a corresponding one of a plurality of small chamber corresponding positions in the bottom plate, the light transmitting/reflecting plate including a mini-light transmitting/reflecting plate region provided at each of the small chamber corresponding positions, having an area S, and including a central reflecting section disposed at a portion directly above the corresponding point light source and having high light reflectance, low light transmittance, and an area ΔS, and an outer reflecting section disposed on the periphery of the central reflecting section and having light transmittance increasing along with a distance from the central reflecting section, wherein the predetermined distance ranges from 2 mm to 10 mm, and the ratio ΔS/S of the area ΔS to the area S ranges from 5% to 15%; and wherein a pillar having a height larger than predetermined distance is formed on the bottom plate, and the light transmitting/reflecting plate is fixed to the pillar in such a manner that a distal end of the pillar protrudes to a certain height from the light transmitting/reflecting plate.