Light-emitting device

A light-emitting device comprising:

• a substrate;
• a first electrode and a second electrode formed on an upper surface of the substrate with a gap between the first electrode and the second electrode, the gap being provided at a central portion of the upper surface of the substrate;
• at least one first light-emitting diode element mounted on the first electrode;
• and
• at least one second light-emitting diode element mounted on the second electrode, wherein
• the first light-emitting diode element includes a pair of element electrodes as a first element electrode and a second element electrode on an upper surface of the first light-emitting diode element and the second light-emitting diode element includes a pair of element electrodes as a first element electrode and a second element electrode on an upper surface of the second light-emitting diode element,
• the first light-emitting diode element is connected by a wire to at least one of the first electrode and the second electrode, and the second light-emitting diode element is connected by a wire to at least one of the first electrode and the second electrode, wherein
• the substrate includes an elongated shape,
• the first electrode includes an elongated shape extending along the elongated shape of the substrate and the second electrode includes an elongated shape extending along the elongated shape of the substrate,
• an elongated gap in the form of a slit is provided between the first electrode and the second electrode,
• a plurality of the first light-emitting diode elements are mounted on the first electrode and a plurality of the second light-emitting diode elements are mounted on the second electrode, the first light-emitting diode elements and the second light-emitting diode elements are disposed to be a plurality of pairs each with one first light-emitting diode element and one second light-emitting diode element, and
• in each pair of the plurality of pairs, the first light-emitting diode element is electrically connected to at least one of the first electrode and the second electrode by a wire, and the second light-emitting diode element is electrically connected to at least one of the first electrode and the second electrode by a wire.

A light-emitting device comprising:

• a substrate;
• a first electrode and a second electrode formed on an upper surface of the substrate with a gap between the first electrode and the second electrode, the gap being provided at a central portion of the upper surface of the substrate;
• at least one first light-emitting diode element mounted on the first electrode;
• and
• at least one second light-emitting diode element mounted on the second electrode, wherein
• the first light-emitting diode element includes a pair of element electrodes as a first element electrode and a second element electrode on an upper surface of the first light-emitting diode element and the second light-emitting diode element includes a pair of element electrodes as a first element electrode and a second element electrode on an upper surface of the second light-emitting diode element,
• the first light-emitting diode element is connected by a wire to at least one of the first electrode and the second electrode, and the second light-emitting diode element is connected by a wire to at least one of the first electrode and the second electrode, wherein
• the first electrode includes a first inner portion adjacent to the gap and a first outer portion outside the first inner portion, and the second electrode includes a second inner portion adjacent to the gap and a second outer portion outside the second inner portion of the second electrode,
• the first inner portion of the first electrode includes a first inner edge and the second inner portion of the second electrode includes a second inner edge, and the first inner edge and the second inner edge demarcate the gap positioned between the first electrode and the second electrode,
• the first outer portion of the first electrode includes a first outer edge at an opposite side of the first inner edge and the first outer portion is an area positioned outside of a center line between the first inner edge and the first outer edge,
• the second outer portion of the second electrode includes a second outer edge at an opposite side of the second inner edge and the second outer portion is an area positioned outside of a center line between the second inner edge and the second outer edge,
• the first light-emitting diode element is mounted on the first outer portion of the first electrode and connected by a wire to at least one of the first inner portion of the first electrode and the second inner portion of the second electrode,
• the second light-emitting diode element is mounted on the second outer portion of the second electrode and connected by a wire to at least one of the first inner portion of the first electrode and the second inner portion of the second electrode,
• the outer portion of the first electrode includes a first upper surface electrode and a first lower surface electrode electrically connected to the first upper surface electrode via a first through-hole, and the outer portion of the second electrode includes a second upper surface electrode and a second lower surface electrode electrically connected to the second upper surface electrode via a second through-hole,
• the first light-emitting diode element is mounted on the first upper surface electrode to cover the first through-hole, and the second light-emitting diode element is mounted on the second upper surface electrode to cover the second through-hole, and
• at least one of the first and second upper surface electrodes and the first and second lower surface electrodes configured to be a power supply terminal of each of the first and second electrodes.