Lamp assembly adapted to illuminate a backlit sign

Details Lamp assembly adapted to illuminate a backlit sign Lamp assembly adapted to illuminate a backlit sign

G - Physics

09

F

G09F 13/04 (2006.01) H05K 7/20 (2006.01)

Patent

CA 2551384

A lamp assembly and method for illuminating a backlit sign include at least one circuit board and light emitting diodes mounted on the circuit board. The light emitting diodes are oriented such that a majority of emitted light or a beam from the circuit board is directed to only a portion of the backlit sign. The light emitting diodes are positioned uniformly around a perimeter of the circuit board to ensure uniform illumination around the lamp assembly. The circuit boards are arranged parallel to each other and perpendicular to a longitudinal axis of the lamp assembly. The lamp assembly includes a plurality of resistors mounted on the circuit board such that heat dissipated by the resistors is uniformly distributed over the circuit board. The lamp assembly also includes a Bridge rectifier to provide a DC output voltage from AC or DC input voltages.

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