Patent ID: 8430552

Claim:
A light-guiding plate, comprising: a main unit including at least one main body, wherein the at least one main body has a light-receiving surface, a light-reflecting surface, and a light-projecting surface, the light-receiving surface connects to the light-reflecting surface and the light-projecting surface, the light-reflecting surface corresponds to the light-projecting surface, and the light-reflecting surface has a first bottom portion and a second bottom portion separated from the first bottom portion by a predetermined height; and a reflecting unit including a plurality of reflecting microstructures formed on the light-reflecting surface of the at least one main body, wherein each reflecting microstructure has a first reflecting curved surface, and the first reflecting curved surface of each reflecting microstructure has a first reflecting curved line shown on the lateral surface thereof; wherein the first reflecting curved line of each first reflecting curved surface is substantially composed of a first base point (P 1 ) as an initial point on the first bottom portion of the light-reflecting surface, a second base point (P 2 ) as an end point on the second bottom portion of the light-reflecting surface, and a first curve track connected from the first base point (P 1 ) to the second base point (P 2 ) and passing through a plurality of first trajectory points (P V1 ), wherein the first reflecting curved line of each first reflecting curved surface has a first control point (P C1 ) separated from the first base point (P 1 ) by a first predetermined distance and from the second base point (P 2 ) by a second predetermined distance, and the first curve track of the first reflecting curved line of each first reflecting curved surface is disposed within a triangular area surrounded by the first base point (P 1 ), the second base point (P 2 ), and the first control point (P C1 ); wherein the relationship among {right arrow over (P 1 P V1 )}, {right arrow over (P 1 P C1 )}, and {right arrow over (P 1 P 2 )} for the first reflecting curved line of each first reflecting curved surface conforms to the following formula: P 1 ⁢ P V ⁢ ⁢ 1 → = [ 2 ⁢ AV ⁡ ( 1 - V ) 1 + 2 ⁢ ( A - 1 ) ⁢ V + 2 ⁢ ( 1 - A ) ⁢ V 2 ] ⁢ P 1 ⁢ P C ⁢ ⁢ 1 → + [ V 2 1 + 2 ⁢ ( A - 1 ) ⁢ V + 2 ⁢ ( 1 - A ) ⁢ V 2 ] ⁢ P 1 ⁢ P 2 → , wherein the label A is defined as a weighting factor substantially between 0.1 and 10, and the label V is defined as a parameter substantially between 0 and 1.