Light emitting device having light emitting elements and an air bridge line
First Claim
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1. A light emitting device, comprising:
- a plurality of GaN-based light emitting elements monolithically formed on an insulating substrate such that each GaN-based light emitting element comprises portions of GaN-based layers grown on the insulating substrate,a first electrode pad and a second electrode pad disposed on the insulating substrate,wherein the plurality of light emitting elements are disposed between the first electrode pad and the second electrode pad,the plurality of light emitting elements are divided into a first row, second row, and third row electrically connected together in series,the right most light emitting element of the first row and the right most light emitting element of the second row are connected by an electrode comprising a first air bridge line,the left most light emitting element of the second row and the left most light emitting element of the third row are connected by an electrode comprising a second air bridge line,the plurality of light emitting elements are arranged in a two-dimensional pattern on the substrate,the plurality of light emitting elements are grouped into two groups having equal numbers of light emitting elements,an array of light emitting elements in each group is placed in a zigzag pattern, andthe two groups of light emitting element arrays are connected between the first electrode pad and the second electrode pad 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.
56 Citations
11 Claims
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1. A light emitting device, comprising:
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a plurality of GaN-based light emitting elements monolithically formed on an insulating substrate such that each GaN-based light emitting element comprises portions of GaN-based layers grown on the insulating substrate, a first electrode pad and a second electrode pad disposed on the insulating substrate, wherein the plurality of light emitting elements are disposed between the first electrode pad and the second electrode pad, the plurality of light emitting elements are divided into a first row, second row, and third row electrically connected together in series, the right most light emitting element of the first row and the right most light emitting element of the second row are connected by an electrode comprising a first air bridge line, the left most light emitting element of the second row and the left most light emitting element of the third row are connected by an electrode comprising a second air bridge line, the plurality of light emitting elements are arranged in a two-dimensional pattern on the substrate, the plurality of light emitting elements are grouped into two groups having equal numbers of light emitting elements, an array of light emitting elements in each group is placed in a zigzag pattern, and the two groups of light emitting element arrays are connected between the first electrode pad and the second electrode pad in parallel so that they are of opposite polarities. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A light emitting device, comprising:
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a plurality of GaN-based light emitting elements disposed on an insulating substrate, a first electrode pad and a second electrode pad disposed on the insulating substrate, wherein the plurality of light emitting elements are disposed between the first electrode pad and the second electrode pad, the plurality of light emitting elements comprises a first row and a second row of light emitting elements electrically connected together in series, the light emitting element at a first end of the first row and the light emitting element at a first end of the second row are connected by an electrode comprising a first air bridge line, the plurality of light emitting elements are grouped into two groups, the two groups are connected between the first electrode pad and the second electrode pad in parallel so that the two groups are of opposite polarities, and the light emitting elements and the first electrode pad and the second electrode pad each have a planar shape of triangle.
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Specification
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Current AssigneeSeoul Semiconductor Co., Ltd.
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Original AssigneeSeoul Semiconductor Co., Ltd.
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InventorsSakai, Shiro, Ao, Jin-Ping, Ono, Yasuo
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Primary Examiner(s)Le, Thao
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Assistant Examiner(s)PARKER, ALLEN L
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Application NumberUS12/060,693Publication NumberTime in Patent Office1,435 DaysField of Search257 88- 90, 257 92- 97, 257/103, 257/164, 257/E51.022, 257/E21.381US Class Current257/88CPC Class CodesH01L 2224/24 of an individual high densi...H01L 27/15 including semiconductor com...H01L 27/153 in a repetitive configurati...H01L 27/156 two-dimensional arraysH01L 33/08 with a plurality of light e...H01L 33/32 containing nitrogenH01L 33/38 with a particular shapeH01L 33/42 Transparent materialsH01L 33/62 Arrangements for conducting...
