Patent ID: 8210732
Filing Date: 2012-07-03
Classification: G02B

Abstract:
1. A light guide plate assembly, comprising: a light guide plate which includes a light exit plane for emitting a planar light and a light entrance end disposed in one end of the light exit plane and substantially orthogonal to the light exit plane, is formed into a shape having a thickness in a direction orthogonal to the light exit plane, the thickness being gradually larger as being farther from the light entrance end, and contains scattering particles dispersed therein; and a prism sheet which includes a plurality of prisms arrayed in parallel with each other, and is arranged so that vertex angles of the plurality of prisms face the light exit plane of the light guide plate, wherein: the scattering particles scatter light entering from the light entrance end and propagating in the light guide plate, which satisfy Expressions (1) and (2) below; when lengths of two straight lines sandwiching each of the vertex angles of the plurality of prisms of the prism sheet are equal to each other, an angle formed between the two straight lines of the equal lengths satisfies Expression (3) below; and when the lengths of the two straight lines sandwiching the each of the vertex angles of the plurality of prisms are different from each other, an angle formed between the straight lines of the different lengths satisfies Expression (4) below, in Expressions (1) and (2), Φ represents a scattering cross section [m