| 摘要 |
PURPOSE: An optical film is provided to improve luminance by refracting and condensing light. CONSTITUTION: A base(10) has a vertical reference plane meeting at right angle against the surface. A plurality of first prism elements(30) is formed on the surface based on perpendicular reference plane toward the first side edge. A plurality of second prism elements(40) is formed on the surface based on perpendicular reference plane toward the second side edge. A third prism element(50) is formed on the surface in order to be continued from the final prism element. A fourth prism element(60) is formed on the surface in order to be continued from the final prism element.
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