Light-emitting unit, light-emitting unit combination, and lighting apparatus assembled from a plurality of light-emitting units

A light-emitting unit combination comprising:

• at least two light-emitting units, each light-emitting unit including:
• a flat member which has a round shape;
• a light-emitting member which is provided on a main surface of the flat member;
• at least three sets of terminals which are provided on a periphery of the flat member so as to be apart form each other;
• and
• a wiring pattern which is provided to the flat member to connect each set of terminals with the light-emitting member,
• wherein one set of terminals of a light-emitting unit is set facing one set of terminals of another light emitting unit, and corresponding terminals out of the facing sets of terminals are electrically connected.

A lighting apparatus comprising:

• a plurality of light-emitting units;
• and
• a feeder unit which is connected to an external power supply,
• wherein each light-emitting unit includes:
• a flat member which has a round shape;
• a light-emitting member which is provided on a main surface of the flat member;
• at least three sets of terminals which are provided on a periphery of the flat member so as to be apart from each other;
• and
• a wiring pattern which is provided to the flat member to connect each set of terminals with the light-emitting member,
• the feeder unit includes:
• a flat substrate which has a round shape;
• and
• at least three sets of feeder terminals which are provided on a periphery of the flat substrate so as to be apart from each other, corresponding feeder terminals out of the at least three sets of feeder terminals being connected in parallel,
• the plurality of light-emitting units and the feeder unit are joined at predetermined areas so as to form a polyhedral figure, the predetermined areas each being an area where one set of terminals of a light-emitting unit is put facing one set of terminals of another light-emitting unit or one set of feeder terminals of the feeder unit, with corresponding terminals out of the facing sets of terminals of the light-emitting units being electrically connected to each other, and
• the plurality of light-emitting units are each electrically connected to the feeder unit in parallel.

A lighting apparatus that receives power from an external power supply circuit, comprising:

• a plurality of light-emitting units, each light-emitting unit including:
• a flat member which has a round shape;
• a light-emitting member which is provided on a main surface of the flat member;
• at least three sets of terminals which are provided on a periphery of the flat member so as to be apart from each other;
• and
• a wiring pattern which is provided to the flat member to connect each set of terminals with the light-emitting member,
• wherein the plurality of light-emitting units are joined at predetermined areas so as to form a polyhedral figure, the predetermined areas each being an area where one set of terminals of a light-emitting unit is put facing one set of terminals of another light-emitting unit, with corresponding terminals out of the facing sets of terminals being electrically connected to each other, and
• the plurality of light-emitting units are each electrically connected to the external power supply circuit in parallel.