LED array capable of reducing uneven brightness distribution

• Main Authors: SAITO, TATSUMA, MIYACHI, MAMORU
• Format: Patent
• Language: English; French; German
• Published: 05.03.2014
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HEATING; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21Sand F21V, RELATING TO THEFORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THELIGHT EMITTED; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; SEMICONDUCTOR DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

ABSTRACT OF THE DISCLOSURE A semiconductor LED array (100) comprises a plurality of semiconductor LED elements (101a, 101b) disposed on an oblong substrate that is long in a first direction (W) and arranged along with said first direction (W). Each LED element comprises an electrode layer (12) formed on the substrate (30), a semiconductor LED stack (2) formed on the electrode layer, stretched long in the first direction and comprising a p-type semiconductor layer (23), an active layer (22) and an n-type semiconductor layer (21), a first wiring layer (11) formed along and in parallel to one long side of the semiconductor LED stack, and second wiring layers (8) extending to a direction of a short side (H) from the first wiring layer and electrically connected to the n-type semiconductor layer (21) on a surface of the semiconductor LED stack. The first wiring layers are disposed on different long sides of the semiconductor LED stacks (2) in the adjacent LED elements.