Patent ID: 9064410
Filing Date: 2015-06-23
Classification: G08G

Abstract:
1. An LED traffic light comprising: a circuit board having a front side; a plurality of LEDs provided on the front side of the circuit board; and a masking plate having a front side and a back side opposite to the front side of the masking plate, the masking plate having a plurality of through-holes passing through the masking plate from the back side to the front side of the masking plate, the masking plate being provided such that the back side of the masking plate faces the front side of the circuit board and the plurality of through-holes corresponds to the plurality of LEDs, the masking plate having a plurality of protruding ridges on the front side of the masking plate, each of the plurality of protruding ridges having an upward facing inclined surface that slants downward at a first angle and a downward facing inclined surface that slants upward at a second angle larger than the first angle, the plurality of protruding ridges including a first ridge and a second ridge, the first angle of the first ridge being different from the first angle of the second ridge.