Patent ID: 7513634

Claim:
A structure of a planar illuminator, comprising: at least a light source frame, comprising: a top plate having a plurality of slits and a plurality of tilted plates, wherein the tilted plates are arranged on the top plate, and the tilted plates are connected to an edge of the slits; a bottom plate arranged apart from the top plate; and at least two edge plates arranged opposite to each other, wherein each of the edge plates has a top end and a bottom end, and both of the bottom ends are separately connected to the bottom plate; wherein inner surfaces of the top plate, the bottom plate and the edge plates form a reflective cavity of the light source frame; wherein at least one top end of the two edge plates is open-ended and is bent at an angle; and at least one light source arranged in the light source frame; wherein the light source emits light which impinges on an inner surfaces of the light source frame and then the light is repeatedly reflected within the reflective cavity to propagate the light down the light source frame; wherein a portion of the light pass out of the light source frame via the slits.