Micro LED Defect Detection Patents: Who Leads, Where the Gaps Are 2026
- 59.1% of all 115 records sit with just five assignees, so most of the claim space around dead-pixel repair and inspection throughput is already staked out by a small group.
- Filings fell 91% from 11 in 2021 to 1 in 2024, the last year the dataset treats as complete — the field's peak filing activity (26 records) was back in 2018.
- H01L and F21S dominate at 42.6% and 31.3% of records respectively, while organic-semiconductor overlap (H10K, 7.0%) and lighting-component claims (F21V, 6.1%) stay comparatively open.
Filing growth compares 2021 (11 records) with 2024 (1) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 115 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Micro LED defect detection and repair sits at the intersection of semiconductor process control and display manufacturing. The claims in scope cover identifying dim or dead emitters after mass transfer, laser-based repair and rework, redundancy designs that route around a failed die, and the inspection throughput needed to make micro LED panels viable at volume. Photoluminescence inspection and dead-pixel repair are the two search anchors that define the corpus, alongside detection and scrapping decisions made on the production line.
The 115 records in scope span 2015 through the 2026 cut-off, with United States, European and Chinese filing offices carrying the bulk of activity. Publication lags filing by roughly 18 months, so the most recent one to two years understate real filing volume.
Filing trend and technology composition
Two views of the same 115 records: how filing activity has moved year over year, and which IPC subclasses carry the claims.
Filing trend, 2017–2026
Filings ran from 17 in 2017 to a peak of 26 in 2018, then declined through the decade to 2 in 2026 (a partial year). The steepest confirmed drop is the -91% move from 11 filings in 2021 to 1 in 2024 — the last year the dataset can treat as complete, since publication lag still fills in 2025 and 2026.
Technology composition by IPC subclass
H01L (semiconductor devices) touches 42.6% of the 115 records and F21S (non-portable lighting devices) touches 31.3%, confirming that most claims frame the problem as a device or luminaire issue rather than a display-control one. G09G (display control circuits, 15.7%) and the smaller H10K, F21V and B60Q classes show where detection and repair logic gets claimed alongside adjacent lighting and vehicle-signalling applications. Because records can carry multiple IPC codes, these shares add up to more than 100% of the record total.
Shares are the percentage of the 115 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Micro LED Defect Detection and Repair with Eureka
This page is one run against one query. Ask Eureka your own question about micro led defect detection and repair and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative filing and most-cited records
EP3640990A1 — Micro LED Display Panel and Manufacturing Method
A micro LED display panel with alternating first and second electrode contacts on a base substrate, arranged so each contact pair connects to the bottom electrode of one micro LED and the connection electrode of a neighbouring one, which in turn contacts that LED's top electrode. The layout lets detection happen directly after transfer printing, before further processing locks in any transfer defects.Filed by Shenzhen China Star Optoelectronics Technology; published 2020-04-22.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20150364107A1 | Interactive display panel with IR diodes | 183 |
| 2 | US20150348504A1 | Interactive display panel with emitting and sensing diodes | 118 |
| 3 | US9570002B2 | Interactive display panel with IR diodes | 79 |
| 4 | CN107170773A | 微发光二极管显示面板及其制作方法 | 77 |
| 5 | US20180339644A1 | Lamp for vehicle and vehicle | 55 |
| 6 | US20180339643A1 | Lamp for vehicle and vehicle | 54 |
| 7 | EP3410002A1 | Lamp for vehicle and vehicle | 47 |
| 8 | US20180354406A1 | Lamp for vehicle and vehicle | 46 |
| 9 | EP3410003A1 | Lamp for vehicle and vehicle | 45 |
| 10 | US20200411491A1 | Micro light-emitting diode displays having microgrooves or wells | 26 |
Citation counts reflect influence within the searched corpus and skew toward older filings; they are not a measure of current commercial importance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Three read-outs from the filing pattern that matter for where to file next and who to watch.
Claim space is already crowded at the top
Five assignees hold 68 of the 115 records in scope. A new entrant filing core dead-pixel repair or redundancy-routing claims is filing into territory the leading players have already mapped, which pushes differentiation toward narrower process or throughput claims rather than broad detection methods.
Filing activity has cooled from its 2018 peak
Filings dropped from 11 in 2021 to 1 in 2024, the last complete year in the dataset. That does not mean the technology stalled — it can mean the core detection and repair methods are settled enough that assignees are filing fewer, more targeted continuations rather than broad new claims.
Device-level framing outweighs display-control framing
Nearly twice as many records touch H01L (semiconductor devices) as G09G (display control circuits, 15.7%). Detection and repair claims are more often written as device or process patents than as control-circuit or software patents, which shapes where a freedom-to-operate search needs to start.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to micro led defect detection and repair, with the prior art for and against each one.
Who is filing, and where the field is still open
The ranked leaders account for a majority of filings, but the long tail beyond the top ten still holds nearly a quarter of the corpus.
One assignee sits well ahead of the field
The leading assignee's 41 records is more than double the fifth-place count of 5, a gap wide enough that it likely reflects a sustained internal programme rather than opportunistic filing around a single product cycle.
The top ten hold three-quarters of the corpus
87 of the 115 records belong to just ten of the 31 ranked assignees. Tenth place holds only 3 records, showing how quickly the ranking thins out below the leading group.
A wide but shallow field of secondary filers
Beyond the top ten, the remaining 21 ranked assignees split the rest of the corpus in small numbers each. That pattern suits licensing-in or acquisition scouting more than head-on litigation risk, since no single secondary filer holds a defensible block.
| Assignee | Recent year | YoY |
|---|---|---|
| LG Electronics | 0 | — |
| PlayNitride Display Co., Ltd. | 0 | — |
| Intel Corp. | 0 | — |
| Lumileds LLC | 0 | — |
| LuxVue Technology | 0 | — |
| BOE Technology Group Co., Ltd. | 0 | — |
| Huawei Technologies Co., Ltd. | 0 | — |
| ZKW Group GmbH | 0 | — |
Where to take this landscape
Use this page as a starting map, not a final answer — the next steps depend on whether you're scoping freedom-to-operate or looking for a filing gap.
Run a freedom-to-operate check against the leader's portfolio
With 41 records held by a single assignee, any new detection or repair filing should be checked against that portfolio specifically before drafting claims.
Explore assignee portfolios in EurekaTrack the under-claimed branches before they fill in
H10K overlap and F21V component-level claims show low record counts now; that can close quickly once a leading filer moves into them.
Set up a monitoring alert in EurekaCommon questions about this landscape
One assignee leads with 41 of the 115 records in scope, well ahead of the fifth-place holder at 5 records. The top five assignees combined hold 59.1% of all 115 records, and the top ten hold 75.7%. Below the top ten the field thins quickly across 21 more ranked assignees, most holding only a handful of records each.
No — filings peaked at 26 in 2018 and have declined since, falling 91% from 11 filings in 2021 to just 1 in 2024, the most recent year the dataset treats as complete. Publication lag of roughly 18 months means 2025 and 2026 figures will still rise as more filings are published, but the multi-year trend through 2024 is a real decline, not an artefact of lag. This suggests core detection and repair methods have matured into fewer, more targeted continuation filings rather than broad new claims.
H01L (semiconductor devices) is the largest class, touching 42.6% of the 115 records, followed by F21S (non-portable lighting devices) at 31.3%. G09G (display control circuits) covers 15.7%, with smaller shares in F21Y, B60Q, H05B, H10K and F21V. Because a single patent record can carry several IPC codes, these shares sum to more than 100% of the record total and should not be read as mutually exclusive categories.
The smaller IPC classes point to comparatively under-claimed territory: H10K (organic semiconductor overlap, 7.0% of records) and F21V (lighting device components, 6.1%) carry far fewer filings than the dominant H01L and F21S classes. Vehicle-signalling redundancy design under B60Q (11.3%) is present but not saturated. These are signals worth verifying with a dedicated search, not confirmed white space, since low record counts can also reflect a narrow search string rather than an open field.
The United States receives the most filings in this dataset at 52, followed by the European Patent Office at 26 and China at 25. WIPO's PCT route accounts for only 5 filings, with Austria and Taiwan each in single digits. The heavy US and EPO weighting suggests most applicants are prioritising those two jurisdictions directly rather than routing broadly through PCT first.
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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.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.