Quantum Dot Display Patents: Leaders, Trends & White Space 2026
- Filing activity peaked in 2021 at 9 families and has not returned to that level since, suggesting the core brightness-enhancement claim space is settling rather than accelerating.
- Two receiving offices — the United States and China — account for the large majority of filings, with Europe, WIPO, Canada and the UK together forming a thin secondary tier.
- H10K (organic semiconductor / OLED-adjacent) classifications appear in the majority of records, meaning quantum dot brightness claims are being written and examined alongside OLED stack architecture, not apart from it.
Filing growth compares 2021 (9 records) with 2024 (5) — 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 46 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This dataset tracks patent families at the intersection of quantum dot displays and the specific efficiency levers — external quantum efficiency, brightness enhancement, and light extraction — that determine how much of a QLED’s generated light actually reaches the viewer. The search combines quantum-dot-display terminology with efficiency-claim language and narrows to IPC classes covering light-emitting device structure and quantum dot materials, so it captures device-level and materials-level filings rather than every patent that merely mentions quantum dots.
Coverage runs from 2015 through the 2026-07-31 cut-off. Because publication typically lags filing by around 18 months, the most recent one to two years in any trend line will understate actual filing activity — treat the tail of the chart as a floor, not a ceiling.
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Filing trends and technology composition
Two views of the same 46-family dataset: how filing volume has moved year over year, and which IPC subclasses carry the claims.
Filing trend shows a 2021 peak, not sustained growth
Filings rose from zero in 2017 to a peak of 9 in 2021, then eased back toward the 2022 midpoint of 3. That shape — a single peak followed by a pullback rather than a plateau at the top — points to a wave of filing activity tied to a specific technology push (likely non-cadmium QD materials and layer-stack optimisation) rather than a steadily compounding field. Readers should treat the most recent two years as undercounted given publication lag, but even allowing for that, the trend does not show acceleration.
H10K dominates; C09K and H01L form a supporting materials/device tier
H10K (organic semiconductor devices, the OLED-adjacent class) appears in the large majority of the 46 records, confirming that quantum dot brightness and efficiency claims are largely filed and examined as light-emitting-device architecture. C09K (functional materials) and H01L (semiconductor devices) each cover roughly a third of records, indicating a real but secondary materials-chemistry claim track. B82Y (nanotechnology) appears in about a quarter of records — worth watching as the class most likely to house novel QD synthesis claims that sit outside the device-architecture mainstream.
Shares are the percentage of the 46 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Quantum Dot Display Brightness and Efficiency with Eureka
This page is one run against one query. Ask Eureka your own question about quantum dot display brightness and efficiency and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records anchoring this space
Quantum dot display panel and manufacturing method thereof
A quantum dot display panel and a manufacturing method thereof are provided. The quantum dot display panel includes an array substrate; a luminescent layer disposed on the array substrate; an encapsulation layer disposed on the luminescent layer; and a color filter layer disposed on the encapsulation layer. The color filter layer includes a plurality of pixel areas. Each of the plurality of pixel areas includes a plurality of sub-pixel filter layers. Each of the sub-pixel filter layers is made of a quantum dot material.Filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. — granted 2023-10-10.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20200362240A1 | II-VI BASED NON-Cd QUANTUM DOTS, MANUFACTURING METHOD THEREOF AND QLED USING THE SAME | 23 |
| 2 | US20200235326A1 | Multiple-layer quantum-dot LED and method of fabricating same | 12 |
| 3 | WO2020029780A1 | 绿色量子点、其制备方法及其应用 | 5 |
| 4 | US11302883B2 | Multiple-layer quantum-dot LED and method of fabricating same | 4 |
| 5 | US20240016018A1 | Display device and preparation method therefor | 3 |
| 6 | US20210380878A1 | QLED and Method for Manufacturing Quantum Dot | 3 |
| 7 | CN110819348A | 绿色量子点、其制备方法及其应用 | 3 |
| 8 | US20240341118A1 | Integrated optoelectronic devices for lighting and display applications | 2 |
| 9 | US11038150B1 | QLED/OLED pixel having reflective cavity electrode configuration | 2 |
| 10 | US11618853B2 | QLED and method for manufacturing quantum dot | 2 |
Citation counts reflect influence within this searched corpus and skew toward older filings; treat them as a signal of prior-art density, not of current commercial relevance.
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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Browse MCP servers →What the numbers mean for filing strategy
Three patterns in this dataset carry direct implications for where new filings are likely to clear examination and where they will collide with dense prior art.
The wave has crested
Filing activity rose steadily through the late 2010s, peaked at 9 families in 2021, and fell back to 3 by the 2022 midpoint. That pattern is consistent with an initial burst of foundational claims around non-cadmium QD chemistry and layer architecture, now largely staked out.
A two-country contest, thin elsewhere
The United States and China together account for the overwhelming majority of receiving-office activity, with Europe, WIPO, Canada and the UK trailing far behind. Filers targeting only EPO or UK protection are operating in a much less contested space by volume.
One record dominates citation influence
The most-cited record in this corpus, covering II-VI-based non-cadmium quantum dots, draws roughly double the citations of the next-ranked filing and far more than the rest of the table. That gap marks it as the reference point competitors and examiners keep returning to.
Device architecture, not just materials
With H10K present in the large majority of records against much smaller counts for B82Y nanotechnology and C09D coatings, most claim activity is being fought over device-layer structure rather than novel particle chemistry or surface treatment.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to quantum dot display brightness and efficiency, with the prior art for and against each one.
Who is filing, and where momentum has stalled
Every tracked assignee in this dataset shows zero filings in the latest year, several with a reported -100% year-on-year change. That flatness across the board — not just for laggards — is itself the finding: no single organisation is currently pulling ahead.
Collaboration is rare and mostly academic-industrial
Only three co-assignee pairs appear across the dataset. The strongest link — NAJING TECHNOLOGY CORPORATION LIMITED (NAJING TECHNOLOGY) with Zhejiang University — pairs a QD materials producer with a research university, a pattern repeated at smaller scale with Fuzhou University and Mindu Innovation Laboratory.
No assignee shows current-year filing activity
Every organisation in the recent-momentum tracking, including the most active historical filers, reports zero filings in the latest year, with several logging a -100% year-on-year drop. Given publication lag, some of this is reporting delay rather than an actual halt — but the uniformity across assignees is notable.
Filer base splits along the US/China axis
The assignee list mixes Chinese display manufacturers and universities with a smaller set of North American and European entities, mirroring the receiving-office split. This is a field with two distinct regional filing communities rather than one globally distributed one.
| Assignee | Recent year | YoY |
|---|---|---|
| TCL Technology Group Corporation | 0 | — |
| 10644137 Canada Inc. | 0 | — |
| NAJING TECHNOLOGY CORPORATION LIMITED | 0 | — |
| Fuzhou University | 0 | — |
| Mindu Innovation Laboratory | 0 | -100% |
| Johnson Matthey PLC (UK) | 0 | -100% |
| Zhejiang University | 0 | — |
| Hongik University Sejong Campus Industry-Academic Cooperation Foundation | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether you are clearing a product or planning a filing.
Run a freedom-to-operate check on the top-cited record
US20200362240A1's non-cadmium II-VI quantum dot claims draw more than double the citations of any other record in this corpus. Any QLED device using cadmium-free quantum dots should be checked against its claim scope before finalising a device architecture.
Explore in EurekaWatch for the 2025-2026 filing rebound once lag clears
Current filings show zero recent-year activity across every tracked assignee, which publication lag makes unreliable as a signal of a real slowdown. Re-run this landscape after the next data refresh before concluding the field has gone quiet.
Explore in EurekaInvestigate the light-extraction microstructure gap
Color filter and light-extraction microstructure claims appear thinly relative to the dense H10K device-architecture cluster. That gap is a candidate area for a defensible first-filing position.
Explore in EurekaCommon questions about this landscape
This dataset identifies 46 patent families published between 2015 and the 2026-07-31 cut-off that combine quantum dot display terminology with efficiency-specific claim language such as external quantum efficiency, brightness enhancement, or light extraction. That is a narrow, claim-focused count, not a count of every patent that merely mentions quantum dots or QLEDs. Broader searches on quantum dot displays generally will return a much larger number because they capture manufacturing, driving-circuit, and unrelated materials filings outside this scope.
The assignee list is led by a mix of Chinese display manufacturers and materials companies alongside university research groups, with the United States and China together accounting for the large majority of receiving-office filings. No single assignee shows current-year filing momentum in this dataset, which makes it difficult to call a single dominant leader right now. Co-filing between industry and academia, such as the NAJING TECHNOLOGY–Zhejiang University pairing, is one of the more distinctive patterns rather than a solo corporate lead.
Based on this dataset, filings rose to a peak of 9 families in 2021 and fell back toward 3 by 2022, and every tracked assignee shows zero filings in the most recent year. Some of that recent drop is an artifact of publication lag, since patents typically publish around 18 months after filing, so 2025-2026 figures will likely revise upward. Even accounting for that lag, the trend does not show the sustained year-over-year growth of an accelerating field.
US11785823B2, held by Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. and granted 2023-10-10, covers a quantum dot display panel built from an array substrate, a luminescent layer, an encapsulation layer, and a color filter layer with quantum-dot-material sub-pixel filter layers. Its claims are specific to a color-filter-layer architecture where each sub-pixel filter is itself made of quantum dot material matching the emitted light color. Anyone designing a QD color-filter stack should review its claim boundaries directly rather than relying on the abstract alone.
Relative to the dense H10K device-architecture cluster that covers the large majority of records, sub-areas like light-extraction microstructures within color filter layers, non-cadmium QD surface ligand chemistry, and encapsulation barrier films show comparatively thin coverage in this dataset. These are candidate areas for a first-filing position, though thin coverage in a 46-family search does not guarantee the area is unclaimed elsewhere in adjacent classifications. A freedom-to-operate search scoped specifically to those sub-areas is the appropriate next step before filing.
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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.