Light-emitting device having light-emitting elements
First Claim
1. A light emitting device comprising a plurality of GaN-based light emitting elements formed on an insulating substrate,wherein the plurality of light emitting elements are monolithically formed,wherein the plurality of light emitting elements form two groups, within each of the two groups the light emitting elements being connected in series,wherein the plurality of light emitting elements are arranged in a two-dimensional pattern on the substrate, andwherein each group has an array of light emitting elements placed in a zigzag pattern, and the two groups of light emitting element arrays are connected between two electrodes in parallel so that they are of opposite polarities.
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Abstract
A light-emitting device operating on a high drive voltage and a small drive current. LEDs (1) are two-dimensionally formed on an insulating substrate (10) of e.g., sapphire monolithically and connected in series to form an LED array. Two such LED arrays are connected to electrodes (32) in inverse parallel. Air-bridge wiring (28) is formed between the LEDs (1) and between the LEDs (1) and electrodes (32). The LED arrays are arranged zigzag to form a plurality of LEDs (1) to produce a high drive voltage and a small drive current. Two LED arrays are connected in inverse parallel, and therefore an AC power supply can be used as the power supply.
125 Citations
10 Claims
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1. A light emitting device comprising a plurality of GaN-based light emitting elements formed on an insulating substrate,
wherein the plurality of light emitting elements are monolithically formed, wherein the plurality of light emitting elements form two groups, within each of the two groups the light emitting elements being connected in series, wherein the plurality of light emitting elements are arranged in a two-dimensional pattern on the substrate, and wherein each group has an array of light emitting elements placed in a zigzag pattern, and the two groups of light emitting element arrays are connected between two electrodes in parallel so that they are of opposite polarities.
Specification