Quantum Dot Display Materials Patents: Leaders & White Space 2026
- Filing peaked in 2021 at 8 families and has since flattened rather than climbed, suggesting the core color-conversion and patterning claims are already staked out.
- One assignee pair dominates co-filing BOE's two filing entities co-file together 8 times, far more than any other pairing in the dataset.
- Semiconductor and materials IPC codes overlap heavily H01L and C09K each cover roughly half the corpus, showing device integration and material chemistry are being claimed together, not separately.
What this landscape covers
Quantum dot display materials sit at the intersection of nanocrystal chemistry and display device engineering. This dataset tracks patent families filed against a search built around quantum dot color conversion, cadmium-free formulations, photoluminescence quantum yield, and patterning methods, cross-referenced against the IPC classes covering semiconductor devices, specialty materials, and optics. The corpus spans 31 patent families published between 2015 and mid-2026.
Because publication typically lags filing by around 18 months, the 2025-2026 figures in any trend line understate actual filing activity for those years. Family-level counts are used throughout rather than raw document counts, since they strip out the inflation caused by continuations and multi-jurisdiction refiling of the same invention.
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Filing trend and technology composition
Two views of the same 31-family corpus: how filing activity has moved year over year, and which IPC subclasses carry the claim density.
Filing flattened after 2021
Filings rose from 2 in 2017 to a peak of 8 in 2021, then held at 8 through the 2022 midpoint before easing off. That plateau, not a decline, is the more useful read: it points to a technology where the obvious claim territory has been filed and later entrants are working narrower angles rather than opening new ground.
Semiconductor and materials classes dominate
H01L (semiconductor devices) appears in 18 of 31 families and C09K (materials for miscellaneous applications) in 15, meaning most filings claim both a device structure and a material composition in the same family. H10K (organic semiconductors, including OLED-adjacent work) at 11 and B82Y (nanotechnology) at 7 show meaningful overlap with adjacent display technologies, while G03F (photolithography), G09F (signage/display), G02B (optics) and C01G (metal compounds) form a thinner tail of more specialised filings.
Shares are the percentage of the 31 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 Materials with Eureka
This page is one run against one query. Ask Eureka your own question about quantum dot display materials and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
WO2023065153A1 — Quantum dot material and patterning method for quantum dot display devices (BOE Technology Group)
This filing covers a quantum dot material whose ligand structure includes a decomposable group and an energy-transfer group, designed so that light exposure through a mask breaks down the ligand in the exposed region and produces a polarity change. The changed-polarity quantum dots are then removed with a solvent that otherwise leaves the unexposed film intact, patterning the QD layer without the alkaline development step that conventional photoresist-based patterning uses.Filed by BOE Technology Group; published 2023-04-27. Number, assignee, and date are drawn directly from the record.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20230155075A1 | Light emitting devices including a quantum dot color conversion material and method of making thereof | 10 |
| 2 | US20240172463A1 | Quantum Dot Material and Preparation Method thereof, Quantum Dot Display Device, and Display Apparatus | 3 |
| 3 | CN118795731A | 一种用于高分辨像元制造的量子点光刻胶 | 2 |
| 4 | CN116960233A | 一种量子点色转换层图案化制作方法 | 2 |
| 5 | US20250060518A1 | Nanoparticle film patterning method, method for producing light-emitting element, method for producing displa… | 2 |
| 6 | US12048220B2 | Display device including first and second blue light emitting diodes | 2 |
| 7 | CN118693207A | 量子点色转换玻璃及制备方法、微显示器及制备方法 | 1 |
| 8 | US11380863B2 | Flexible electroluminescent devices | 1 |
Citation counts favour older filings simply because they have had more time to be cited within the searched corpus — read them as a signal of influence, not of current 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. Publication numbers are shown where the record carries one (8 of 8 rows); clicking a row searches Eureka by that number.
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Three read-outs from the trend, IPC, and citation data that matter more than the raw counts on their own.
The plateau is the signal
Filings climbed steadily from 2017 to a peak of 8 in 2021 and held at that level into 2022 rather than continuing to climb. In a 31-family corpus this size, a plateau after growth usually means the foundational composition and device-integration claims have already been staked, and remaining activity is defensive or incremental.
Device and material claims are bundled
The three largest IPC subclasses are not mutually exclusive: a majority of families touch both a semiconductor device structure (H01L) and a materials composition (C09K), with a substantial minority also reaching into organic semiconductor territory (H10K). New entrants drafting a materials-only claim risk running into device-integration prior art from the same filings.
US and China lead, PCT filings signal export intent
The United States receives the largest share of filings at 14, with China at 8 and 7 filed through the WIPO PCT route rather than a single national office. The PCT share suggests a meaningful portion of applicants are still deciding where to pursue protection, which keeps the competitive map for these families unsettled outside the US and China.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to quantum dot display materials, with the prior art for and against each one.
Who is filing, and where the gaps sit
Filing in this corpus is concentrated around one applicant family rather than spread evenly, with a long tail of single or low-count filers behind it.
BOE's two filing entities co-file at scale
BOE Technology Group and Beijing BOE Technology Development co-file together across 8 families, by far the strongest co-assignee pairing in the dataset. That concentration means a large share of the corpus's device-and-patterning claims trace back to a single corporate group filing under two related entities.
No assignee shows fresh-year momentum
Every one of the six most active assignees, including BOE's two entities, Nanosys, Sharp, the Korean ETRI, and a further nanotechnology filer, shows zero filings in the latest tracked year. Given the typical 18-month publication lag, this likely reflects reporting delay rather than an actual stop in R&D, but it does mean the visible frontier of activity is thinner than the historical count suggests.
One US filing anchors the citation graph
US20230155075A1, covering light-emitting devices with a quantum dot color conversion material, is cited 10 times within this corpus, roughly triple the next most-cited record. Its age relative to the rest of the corpus is likely part of why it leads; newer filings simply have had less time to accumulate citations.
| Assignee | Recent year | YoY |
|---|---|---|
| BOE Technology Group Co., Ltd. | 0 | — |
| Beijing BOE Technology Development Co., Ltd. | 0 | — |
| Nanosys, Inc. | 0 | — |
| Sharp Corporation | 0 | — |
| Electronics and Telecommunications Research Institute (ETRI) | 0 | — |
| Nanotechnology Co., Ltd. | 0 | — |
| Applied Materials, Inc. | 0 | — |
| Guangdong Juhua Printed Display Technology Co., Ltd. | 0 | — |
Where to take this analysis
The dataset points to a small set of practical next steps for teams deciding where to file or where to license around.
Map the BOE co-filing structure in full
With 8 co-filed families between two related BOE entities, a full claim-by-claim comparison would show whether the pair is genuinely diversifying coverage or duplicating it across jurisdictions.
Explore assignee relationships in EurekaPressure-test the under-claimed branches
Cadmium-free ligand chemistry and flux-stability encapsulation show thinner filing density than the core patterning claims, which is where freedom-to-operate work is most likely to pay off.
Run a white-space search in EurekaTrack the next publication window
Given the 18-month publication lag, filings from 2025 and early 2026 are still arriving; revisiting the trend line in two quarters will show whether the plateau is holding or breaking.
Set a monitoring alert in EurekaCommon questions about quantum dot display material patents
Within this dataset, BOE Technology Group and its related entity Beijing BOE Technology Development are the most active filers, and they co-file together across 8 families, the strongest co-assignee pairing in the corpus. Other repeat filers include Nanosys, Sharp, South Korea's ETRI, and a separate nanotechnology-focused applicant, though none show filing activity in the most recent tracked year. This concentration means much of the device-integration and patterning claim space traces back to one corporate group rather than being spread across many independent applicants.
Cadmium-free formulations replace cadmium-based quantum dot cores with alternative nanocrystal chemistries to meet environmental and regulatory restrictions on cadmium in consumer electronics. It is one of the search terms defining this dataset's scope, and it appears as a claim element across multiple families rather than as a standalone technology area. Because it intersects with core materials claims (C09K) rather than sitting in its own IPC class, cadmium-free chemistry is one of the areas where claim boundaries are least clearly separated from device-integration patents.
Filings in this corpus rose from 2 in 2017 to a peak of 8 in 2021, then held flat into 2022 rather than continuing to grow. A plateau after sustained growth typically indicates that the foundational claims covering core compositions and device structures have already been filed, leaving later entrants to pursue narrower, more specific improvements. It does not necessarily mean R&D activity has slowed; recent years are also understated because publication lags filing by roughly 18 months.
H01L (semiconductor devices) and C09K (materials for miscellaneous applications) are the two largest classes in this dataset, appearing in 18 and 15 of 31 families respectively, and a majority of filings carry both codes together. H10K, covering organic semiconductors including OLED-adjacent technology, appears in 11 families, showing meaningful overlap with organic display work. Smaller classes including photolithography (G03F), signage and display (G09F), optics (G02B), and metal compounds (C01G) form a thinner tail worth checking for less-crowded filing angles.
The thinner IPC classes in this dataset, particularly photolithography-compatible patterning (G03F) and metal-compound precursor routes (C01G), carry far fewer families than the dominant H01L and C09K classes, suggesting less claim density there. Flux-stability encapsulation and blue-light absorption layer stacks also appear as narrower sub-areas within the broader corpus rather than as heavily claimed territory on their own. Any freedom-to-operate work should still confirm this against a full claims review, since a thin IPC count does not guarantee an open path, only a less crowded one.
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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.