Patent ID: 7690781

Claim:
An ink jet printer comprising: a platen configured to receive a print media; an ink jet head configured to shoot an ink drop at a surface of the print media, said ink jet head being configured to move substantially parallel to a surface of said platen over the print media on the platen, said ink jet head being configured to move in a transverse direction across said surface of said platen; and a multiplicity of UVLEDs configured to irradiate the ink drop on the surface of the print media with UV rays to cure the ink drop on the surface of the print media, the multiplicity of UVLEDs being arranged in an array at respective apexes of equilateral triangles, the equilateral triangles being equal in size and arranged on a plane substantially parallel to the surface of the platen so that distances between UVLEDs adjacent to each other are substantially equal.