Unit of arrayed light emitting diodes

Abstract

A unit of arrayed light emitting diodes in accordance with the present invention is formed in a manner in which gold paste or the like is applied by screen printing on a substrate (11) to form an elongate printed conductor (12) having a thickness of less than 40 .mu.m, on which light emitting diode arrays (14) having a large number of light emitting areas (5) are disposed. The elongate printed conductor (12) comprises a plurality of printed thick films (121, 122 and 123), the lowermost thick film (121) for example being of a thickness of 10 .mu.m or less, so that both longer side edges of the thick film (121) may have good linearity. Accordingly, using the parallel longer side edges of the elongate printed conductor (12) as reference lines, a plurality of light emitting diode arrays (14) can be disposed with good linearity. In addition, by decreasing a resistance value per unit length of the elongate printed conductor (12) to 1.1 m.OMEGA./mm or less, the current capacity can be increased and the resistance can be lowered.

Dependencies are inferred from the claim text.