GaN LED Efficiency (Droop/Extraction) Patent Snapshot
The GaN LED efficiency space is moderately concentrated, with Seoul Viosys and Mitsubishi Chemical leading a field still expanding on a multi-year basis, though annual volume has eased from its 2017 peak. H01L semiconductor device patents dominate the technology mix, while adjacent branches in photonic and laser-related classifications remain under-served.
Seoul Viosys leads a moderately concentrated field with a clear tier gap below the top two
Seoul Viosys Co Ltd holds the top position in the applicant ranking, followed closely by Mitsubishi Chemical Corporation and Cree LED Inc. The top five filers account for 36% of the combined output of the ranked applicants visible in this query, indicating moderate but not extreme concentration.
The gap between the first and fifth-ranked applicants is meaningful but not prohibitive: scores range from 17 patent records at the top to 8 for POSTECH Academy-Industry Foundation. Below the top tier, activity is broadly distributed across Korean, US, Japanese, Chinese, and European organizations.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Seoul Viosys Co Ltd | 17 | |
| 2 | Mitsubishi Chemical Corporation | 16 | |
| 3 | Cree LED Inc | 10 | |
| 4 | Wolfspeed Inc | 9 | |
| 5 | POSTECH Academy-Industry Foundation | 8 | |
| 6 | Samsung Electronics Co Ltd | 7 | |
| 7 | The Regents of the University of California | 6 | |
| 8 | Ultratech Inc | 5 | |
| 9 | Philips Lumileds Lighting Company LLC | 5 | |
| 10 | Formosa Epitaxy Incorporation | 4 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | IMEC VZW | 4 | |
| 12 | GWANGJU INST OF SCI & TECH | 3 | |
| 13 | Dalian Meiming Epitaxy Technology Co Ltd | 3 | |
| 14 | Gelcore LLC | 3 | |
| 15 | GE Lighting Solutions LLC | 3 | |
| 16 | AXT Inc | 3 | |
| 17 | Lumens Co Ltd | 3 | |
| 18 | Institute of Semiconductors, Chinese Academy of Sciences | 2 | |
| 19 | Lumileds Holding BV | 2 | |
| 20 | Podium Photonics Guangzhou | 2 |
The presence of both large industrial players (Seoul Viosys, Mitsubishi Chemical, Wolfspeed, Samsung Electronics) and research institutions (POSTECH, University of California, IMEC) in the upper ranks suggests that foundational efficiency mechanisms are still being contested through both academic and applied channels, giving new entrants academic partnership paths.
Patent records from the most recent 18–24 months are likely under-counted due to publication lag and should be treated as a floor, not a ceiling, for recent activity. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Multi-year growth continues after a 2017 peak; H01L semiconductors overwhelmingly dominate the IPC mix
The filing trend and technology composition charts together show a field that peaked in 2017 but has sustained a multi-year expansion, concentrated almost entirely within semiconductor device classifications.
Annual filing trend
Annual volume spiked in 2017 and has since settled at lower but persistent levels through the early 2020s. The most recent years (2024–2026) should be read as understated due to publication lag; real recent activity is likely higher than the trend line suggests.
↗ Hover for values · click a bar to ask EurekaTechnology composition
H01L (semiconductor devices) accounts for the overwhelming majority of patent records, reflecting the core device-engineering focus of droop reduction and light-extraction work. H10P, H01S (lasers and stimulated emission), and a handful of applied-science classes each represent a small fraction, signaling limited cross-domain integration to date.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
III-nitride tunnel junction light emitting diode w…
A III-Nitride LED which utilizes n-type III-Nitride layers for current spreading on both sides of the device. A multilayer dielectric coating is used underneath the wire bond pads, both LED contacts are deposited in one step, and the p-side wire bond pad is moved off of the mesa. The LED has a wall plug efficiency or External Quantum Efficiency (EQE) over… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | LED with Particles in Encapsulant for Increased Li… | 176 |
| 2 | High efficiency group III nitride LED with lenticu… | 136 |
| 3 | GaN LED with solderable backside metal | 122 |
| 4 | Increased light extraction from a nitride LED | 106 |
| 5 | GaN Compound Semiconductor Light Emitting Element … | 95 |
| 6 | GAN compound semiconductor light emitting element … | 93 |
| 7 | LED with particles in encapsulant for increased li… | 73 |
| 8 | Increased light extraction from a nitride LED | 71 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for GaN LED efficiency R&D investment
The combination of a Growth-stage lifecycle, moderate concentration, an active university–industry collaboration cluster, and US-led jurisdictional coverage defines the strategic context for new entrants and incumbents alike.
Growth stage with annual volume easing from its 2017 peak
The field is classified as Growth: the recent three-year filing window sits well above the prior three-year window, so the multi-year trajectory is still positive. However, annual volume has eased from its 2017 peak, indicating the field is past its fastest-growth phase. New filings are still appearing across multiple jurisdictions, so core IP positions remain contestable.
Growth · post-peakTop five hold 36% of the ranked applicants visible in this query’ output — room for challengers
With the top five filers accounting for 36% of the ranked applicants visible in this query’ combined patent records, this is a moderately concentrated field rather than a winner-take-all one. The second tier (ranks 6–10) includes Samsung Electronics, the University of California Board of Regents, Ultratech, and Philips Lumileds, all of which remain active. A focused entrant with differentiated technology in light-extraction architecture or quantum-well engineering can realistically accumulate a meaningful position.
Moderate concentrationPOSTECH–Seoul Viosys axis is visible in co-filing activity
The most active co-filing pair in the corpus is POSTECH Academy-Industry Foundation and Seoul Viosys (formerly Seoul Opto Device), with 16 jointly filed records — far more than any other collaboration pair. Philips Lumileds and Koninklijke Philips NV account for 4 joint records. POSTECH also co-filed once each with Seoul Viosys’s related entity and Seoul Opto Device Ansan. This university–industrial champion axis is the visible ecosystem structure and is worth tracking for licensing or partnership opportunities.
University–industry axisUnited States is the primary filing jurisdiction; China is a rising second
The United States leads in patent records filed, followed by China and then Europe (EPO). PCT (WIPO) filings indicate applicants pursuing broad international protection. South Korea and Japan, home to several top applicants, appear as secondary jurisdictions. Any freedom-to-operate assessment for a new GaN LED efficiency product must prioritize the US and Chinese patent landscapes as the two most active enforcement environments.
US-led, China risingGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| POSTECH Academy-Industry Foundation | Seoul Viosys Co Ltd | 16 |
| Philips Lumileds Lighting Company LLC | Koninklijke Philips NV | 4 |
| POSTECH Academy-Industry Foundation | Seoul Viosys Co Ltd | 1 |
| POSTECH Academy-Industry Foundation | Seoul Opto Device Co Ltd ANSAN | 1 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Seoul Viosys Co Ltd
Seoul Viosys holds the top position with 17 patent records, concentrated in H01L 33 semiconductor devices and H10P95, reflecting a deep focus on GaN LED device architecture for efficiency. The company’s 16-record co-filing relationship with POSTECH Academy-Industry Foundation is the most active collaboration in the entire corpus, suggesting a tightly coupled university R&D pipeline. Applicant momentum data is not available for individual trajectory comparison in this dataset.
patent records: 17Mitsubishi Chemical Corporation
Mitsubishi Chemical Corporation ranks second with 16 patent records, primarily in H01L 33 but with additional coverage in C30B crystal growth — a distinguishing materials-science angle absent from most other top applicants. This crystal-growth dimension suggests a focus on substrate and epitaxial layer quality as a lever for efficiency improvement, a technically distinct route from device-architecture-focused competitors.
patent records: 16Frequently asked questions
Seoul Viosys Co Ltd leads the applicant ranking with 17 patent records, followed by Mitsubishi Chemical Corporation with 16. Both are well ahead of third-ranked Cree LED Inc at 10 patent records.
The landscape encompasses 16 patent families in scope, with patent records distributed across multiple jurisdictions including the United States, China, Europe, and WIPO PCT filings.
The United States is the primary jurisdiction, followed by China and Europe (EPO). WIPO PCT filings indicate international protection strategies are common. South Korea and Japan are secondary jurisdictions, consistent with the home markets of several top applicants.
The field is in a Growth stage: the recent three-year filing window sits well above the prior three-year window. However, annual volume has eased from its 2017 peak, so the field is expanding on a multi-year basis but is past its fastest annual growth phase.
H01L (semiconductor devices) is visible in with 153 patent records, making it the near-exclusive technical domain in this landscape. H10P holds 11 records and H01S (lasers and stimulated emission) holds 5, with all other classes represented by only 1 record each.
Yes. POSTECH Academy-Industry Foundation and Seoul Viosys have co-filed 16 patent records together — the most active collaboration pair in the corpus by a wide margin. Philips Lumileds and Koninklijke Philips NV account for 4 co-filed records, and POSTECH has additional single co-filings with related Seoul entities.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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