Patent ID: 8596820

Claim:
A light-emitting-diode unit, comprising: a base having an elongated shape and high thermal conductivity; only a single circuit board having an elongated shape and provided on an upper surface of the base, the circuit board including a single elongated penetrating hole formed at a central portion thereof, a pair of wiring patterns formed on an upper surface of the circuit board extending along both sides of the single elongated penetrating hole, and a pair of terminal electrodes including a first terminal electrode and a second terminal electrode that are provided at one end portion of the upper surface of the circuit board and connected respectively to ends of the pair of wiring patterns; a plurality of light-emitting-diode elements mounted in a line between the pair of wiring patterns on the upper surface of the base exposed in the single elongated penetrating hole of the circuit board and each electrically connected to the pair of wiring patterns by a pair of wires; and a light-transmitting resinous body provided to cover the upper surface of the circuit board and the upper surface of the base exposed in the single elongated penetrating hole of the circuit board and to seal the plurality of light-emitting-diode elements with the pair of terminal electrodes exposed from the light-transmitting resinous body, wherein the first terminal electrode provided at the one end portion of the upper surface of the circuit board is disposed at a position that is more extended in a longitudinal direction of the base than that of the second terminal electrode, and wherein the base has a flat top surface on which both the circuit board and the light emitting diodes are both fixed on a same level on the flat top surface.