| 摘要 |
The present invention relates to an LED lens for flood light of a sign board, capable of efficiently and uniformly diffusing light emitted from an LED light source on an entire surface of the sign board. The LED lens according to the present invention is disposed in an upper portion of an LED of flood light of a sign board and uniformly diffuses light emitted from the LED. In the LED lens, the lens is symmetrical to a y-axis and is asymmetrical to an x-axis, wherein the x-axis is a horizontal axis crossing an optical axis of the LED in a horizontal direction and the y-axis is a vertical axis crossing the optical axis of the LED in a vertical direction. The LED lens comprises a bottom surface provided with a light incidence surface on which light emitted from the LED is incident, and a light exit surface from which the light incident on the light incidence surface is exited. The light incidence surface includes: a first groove portion symmetrical to the y-axis and extending in the y-axis direction; a second groove portion symmetrical to the y-axis and protruding from a front upper portion of the first groove portion to have an upwardly convex shape. The light exit surface is asymmetrical to the y-axis and is provided such that the light emitted from the LED and incident on the light incidence surface is diffused toward both sides with respect to the y-axis. |
