US 6,305,825 B1Granted

Vehicle lighting device with a plurality of light-emitting diodes employed as light source

AssigneeIchikoh Industries, Ltd.

InventorKatsuhiko Okubo

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Abstract

There is provided a vehicle lighting device employing a plurality of light-emitting diodes as light sources. Mount pads are provided on a light-emitting diode mount surface of a circuit board. On the circuit board, the mount pads are provided on both sides of a plurality of pairs of through-holes. When two leads of the light-emitting diode are inserted into the pair of two through-holes, respectively, and the light-emitting diode is mounted to the mount pads on the both sides, an air vent space is formed which is defined by the light-emitting diode, the circuit board, and the mount pads on the both sides. Accordingly, air comes out smoothly of the through-holes via the space when solder is entered the through-holes in an automated soldering process. This allows the light-emitting diodes to be disposed in place relative to the circuit board. Furthermore, it is ensured that the leads of the light-emitting diodes and conductive traces of the circuit board are connected to each other via solder.

Claims7

Dependent claims

A vehicle lighting device employing a plurality of light emitting diodes as light sources, comprising one or a plurality of light source units, composed of a plurality of light emitting diodes soldered to a circuit board,

said light emitting diode comprising a main body as a light emitting portion and two leads extending from a bottom surface of said main body,
said circuit board being provided with a plurality of pairs of through-holes, two in a pair,
a light emitting diode mount surface of said circuit board being provided with mount pads,
said mount pads being provided on laterally opposite sides of said plurality of pairs of through-holes on the light emitting diode mount surface, wherein
when said two leads are inserted into said two through-holes and the bottom surface of said main body is mounted to said mount pads on the laterally opposite sides, an air vent space is formed which is defined by said main body, said circuit board, and said mounted pads on the laterally opposite sides, and
said space is to allow air to come out smoothly of said through-holes when said solder is entered said through-holes.

3 more elements

Dependencies are inferred from the claim text.