LED SIGN BOARD WITH MICROLENS SHEET

摘要

PURPOSE: An LED sign board including a lens sheet is provided to increase visibility by forming a surface light source or a line light source instead of a point light source. CONSTITUTION: A plurality of minute condensing lenses is formed to a surface of a lens sheet(1), and is arranged on a front surface of an LED sign board(2) with a sheet shape. A gap between the centers of the minute condensing lenses is smaller than a gap between LEDs of the LED sign board. The number of minute condensing lenses is larger than the number of LEDs. The minute condensing lens has a shape for collecting a light emitted from the LED, and is formed to a surface of the lens sheet with a convex lens shape of a spherical or aspherical shape.