Light-emitting device having light-emitting elements with polygonal shape
First Claim
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1. A light emitting device, comprising:
- a plurality of GaN-based light emitting elements arranged on an insulating substrate; and
a p-type electrode and an n-type electrode arranged on a GaN-based light emitting element of the plurality of GaN-based light emitting elements,wherein the plurality of light emitting elements are connected in series,wherein each light emitting element of the plurality of GaN-based light emitting elements comprises a polygonal shape with more than four sides, an indent portion where a first pair of sides meet at a substantially right angle, and a corner portion where a second pair of sides meet at a substantially right angle,wherein each side of the first pair of sides is parallel with a respective side of the second pair of sides,wherein a GaN-based light emitting element of the plurality of GaN-based light emitting elements comprises an n-type semiconductor layer comprising a polygonal shape with more than four sides, the n-type semiconductor layer being disposed between the insulating substrate and a p-type semiconductor layer,wherein a first light emitting element, a second light emitting element, and a third light emitting element of the plurality of GaN-based light emitting elements are arranged linearly, andwherein a side of the second pair of sides of the first light emitting element faces a side of the second pair of sides of the second light emitting element, and a side of the first pair of sides of the second light emitting element faces a side of the first pair of sides of the third light emitting element.
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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.
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Citations
14 Claims
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1. A light emitting device, comprising:
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a plurality of GaN-based light emitting elements arranged on an insulating substrate; and a p-type electrode and an n-type electrode arranged on a GaN-based light emitting element of the plurality of GaN-based light emitting elements, wherein the plurality of light emitting elements are connected in series, wherein each light emitting element of the plurality of GaN-based light emitting elements comprises a polygonal shape with more than four sides, an indent portion where a first pair of sides meet at a substantially right angle, and a corner portion where a second pair of sides meet at a substantially right angle, wherein each side of the first pair of sides is parallel with a respective side of the second pair of sides, wherein a GaN-based light emitting element of the plurality of GaN-based light emitting elements comprises an n-type semiconductor layer comprising a polygonal shape with more than four sides, the n-type semiconductor layer being disposed between the insulating substrate and a p-type semiconductor layer, wherein a first light emitting element, a second light emitting element, and a third light emitting element of the plurality of GaN-based light emitting elements are arranged linearly, and wherein a side of the second pair of sides of the first light emitting element faces a side of the second pair of sides of the second light emitting element, and a side of the first pair of sides of the second light emitting element faces a side of the first pair of sides of the third light emitting element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification