Patent ID: 9182086
Filing Date: 2015-11-10
Classification: G02B

Abstract:
1. A diffusing plate structure corresponding to a light source, comprising: an incidence surface, an emergence surface, and a side surface, the incidence surface being opposite to the emergence surface, the light source being adjacent to a side of the incidence surface; and a light diffusing structure disposed on at least one of the incidence surface and the emergence surface, having rotational symmetry relative to the light source, and including a plurality of unit blocks distributed evenly, every unit block including a first micro diffusing structure or a second micro diffusing structure, wherein the first micro diffusing structure includes a first transparent area for transmitting light and a first opaque area for reflecting and diffusing light, the first opaque area surrounds the first transparent area, the second micro diffusing structure includes a second transparent area for transmitting light and a second opaque area for reflecting and diffusing light, and the second transparent area surrounds the second opaque area; wherein a density of the unit block is d, an ear of the unit block is S, and a predetermined threshold is f where 0<f≦1; and wherein when d is greater than f, the first micro diffusion structure is disposed on the unit black, an area of the first transparent area is S1, and d=(S−S1)/S; when d is less than f, the second micro diffusing structure is disposed on the unit block, an area of the second opaque area is S2, and d=S2/S.