Quantum Dot Display Materials Patents: Leaders & Trends 2026
- Filing already peaked. 2021 recorded 14 filings against a total of 43 families across the whole window, with the pace cooling since.
- China dominates the receiving offices. 18 of the tracked filings entered via China's patent office, against 15 for the United States and 7 via the PCT route.
- Cadmium-free chemistry drives the claims. Perovskite and other cadmium-free quantum dot materials sit behind the most-cited records in this set, ahead of core device architecture claims.
Filing growth compares 2021 (14 records) with 2024 (6) — 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.
What this landscape covers
This landscape tracks patent families at the intersection of quantum dot display technology and the materials that make it work: cadmium-free quantum dots, indium phosphide (InP) quantum dots, perovskite quantum dots and quantum dot material formulations generally, filtered to records classified under C09K11/88, H10K50/11 and B82Y20. It is a materials-first cut, not a full quantum dot display landscape — device architecture, driving circuitry and manufacturing equipment filings that do not also claim a specific material composition fall outside the search.
The 43 families span 2015 through the current data cut-off. Because publication typically lags filing by around 18 months, the last one or two years in any trend chart will look thinner than they eventually turn out to be once late filings publish.
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Filing trends and technology composition
Two views of the same 43 families: how filing volume has moved year over year, and which IPC subclasses carry the claims.
Filing trend, 2017-2026
Filings rose from 3 in 2017 to a peak of 14 in 2021, then eased back toward single digits by the 2022 midpoint of 4 and beyond. That shape points to a filing wave that has already crested rather than one still building — though the final two years are undercounted due to publication lag.
IPC subclass distribution
H10K (organic semiconductor devices, including OLED-adjacent structures) appears in 29 of the 43 records and C09K (materials for miscellaneous applications) in 24, confirming this is primarily a materials-and-device-integration corpus rather than a pure chemistry one. B82Y (nanotechnology) at 16 and H01L (semiconductor devices) at 15 show the nanocrystal synthesis and semiconductor-integration angles are both active, while C01G, C09D, H10H and H10P each register only 2 records — thin enough to be worth a closer look rather than written off.
Shares are the percentage of the 43 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 Advanced Materials with Eureka
This page is one run against one query. Ask Eureka your own question about quantum dot display advanced materials and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
US11785823B2 — Quantum dot display panel and manufacturing method thereof
Covers a quantum dot display panel built on an array substrate with a luminescent layer, an encapsulation layer and a color filter layer whose sub-pixel filter layers are each made of a quantum dot material matched in colour to the sub-pixel, with a defined upper-surface configuration on at least one sub-pixel filter layer.Assigned to Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., granted 2023-10-10.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN111117601A | 发光性能稳定的红光钙钛矿量子点及其制备方法 | 10 |
| 2 | CN106905953A | 一种低成本钙钛矿量子点显示材料及制备方法 | 9 |
| 3 | CN116891738A | 窄谱带蓝光Cu-Ga-S/ZnS纳米晶的制备方法 | 3 |
| 4 | US20240016018A1 | Display device and preparation method therefor | 3 |
| 5 | US20240172463A1 | Quantum Dot Material and Preparation Method thereof, Quantum Dot Display Device, and Display Apparatus | 3 |
| 6 | WO2018120514A1 | QLED器件及其制备方法 | 3 |
| 7 | US20240341118A1 | Integrated optoelectronic devices for lighting and display applications | 2 |
| 8 | CN114686204A | 量子点复合材料及其制备方法、量子点发光二极管 | 2 |
| 9 | US20240083764A1 | QLED and preparation method thereof | 1 |
| 10 | CN115960601A | 一种量子点发光层及其制备方法和量子点发光二极管器件 | 1 |
Citation counts favour older filings simply because they have had more time to be cited; read this as a map of influence within the searched corpus, not a ranking of current technical 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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Browse MCP servers →What the numbers mean for a filing decision
Three findings that shape where a new filing would land, and how crowded that space already is.
The wave has crested
Filings climbed from 3 in 2017 to 14 at the 2021 peak, then fell back toward the 4-filing level by 2022. A technology under active claim-building shows the opposite shape, so new entrants should expect an already-staked core rather than open ground.
China and the US split the filing base
China's patent office received 18 of the tracked filings and the US 15, with 7 more entering via the PCT route and only small numbers reaching Europe or India. A materials claim cleared for China does not automatically clear US or European prior art, and vice versa.
Device integration outweighs pure chemistry
More records sit in H10K (organic semiconductor device structures) than in C09K (materials chemistry) alone, meaning most filings couple a material composition to a specific device layer rather than claiming the material in isolation.
Collaboration is thin and concentrated
Only three co-assignee pairings appear across the dataset, and the strongest link is between two entities under the same corporate group. Cross-institution co-filing between unrelated organisations is close to absent here.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to quantum dot display advanced materials, with the prior art for and against each one.
Who is filing, and where the gaps sit
Filing activity concentrates among a handful of Chinese corporate and research groups, with recent-year momentum flattening even for the most active names.
BOE's internal pairing dominates collaboration
BOE Technology Group Co., Ltd. (BOE Technology Group) and its affiliate Beijing BOE Technology Development Co., Ltd. co-file together 9 times, by far the strongest link in the dataset. Both show 0 filings in the latest tracked year, consistent with the overall cooling trend rather than a group-specific pullback.
Every leading name shows zero in the latest year
京东方, TCL科技集团, 北京京东方技术开发, Yangzhou University, Beijing Jiaotong University and Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences all register 0 filings in the most recent tracked year, with Yangzhou University down -100% YoY. That is consistent with publication lag rather than a real stop in R&D, but it means the visible leaderboard is backward-looking.
Research institutes cross-file only occasionally
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences (Ningbo Institute of Materials Technology and Engineering, CAS) appears in two of the three co-assignee pairs, once with BOE and once with Ningbo Hangzhou Bay New Materials Research Institute, suggesting it acts as a materials-science bridge between academia and display manufacturers.
| Assignee | Recent year | YoY |
|---|---|---|
| BOE Technology Group Co., Ltd. | 0 | — |
| TCL Technology Group Corporation | 0 | — |
| Beijing BOE Technology Development Co., Ltd. | 0 | — |
| Yangzhou University | 0 | -100% |
| Beijing Jiaotong University | 0 | — |
| Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences | 0 | — |
| 10644137 Canada Inc. | 0 | — |
| Fuzhou University | 0 | — |
Where to take this next
The dataset points to specific follow-up questions rather than a single conclusion.
Check the design-around space on the most-cited records
CN111117601A and CN106905953A carry the highest citation counts in this corpus and both concern perovskite quantum dot materials — worth a closer claim-by-claim read before filing anything adjacent.
Explore in EurekaWatch for the publication-lag rebound
The apparent drop-off after 2021 is partly a reporting artefact; filings from the last 18 months are still publishing. Re-run this view in six months to see whether the cooling trend holds.
Track this landscapeMap the thin IPC branches against active R&D
C01G, C09D, H10H and H10P each carry only 2 records — check whether that reflects genuine white space or simply a classification gap before assuming it's open.
Run a deeper IPC queryCommon questions about this landscape
Within this dataset, filing concentrates among a small group of Chinese corporate and research entities, most notably BOE Technology Group and its affiliate Beijing BOE Technology Development, which also co-file together more than any other pair in the corpus. TCL Technology Group and several university and CAS-affiliated research institutes also appear as repeat filers. All of the leading names show zero filings in the most recent tracked year, which is more likely a publication-lag effect than a real stop in activity.
Cadmium-free quantum dot chemistry, particularly perovskite quantum dots, sits behind the most-cited records in this corpus, including the two highest-cited Chinese filings. InP quantum dots and general quantum dot material formulations also appear across the IPC classes tracked, but perovskite-based compositions show the strongest citation signal. That citation signal favours older filings, so it reflects influence built up over time rather than necessarily the most active current research direction.
Filing activity peaked at 14 in 2021 and had fallen back to a midpoint of 4 by 2022, which points to a filing wave that has already crested rather than one still accelerating. The final one or two years in the dataset will look artificially low because patent publication typically lags filing by around 18 months, so the true 2025-2026 picture is not yet fully visible. Taken together, the pattern suggests a maturing rather than an emerging filing area.
The smaller IPC branches in this dataset — coatings and inks (C09D), other metal compounds (C01G), and light-emitting semiconductor device structures (H10H) — each carry only 2 records, far fewer than the dominant H10K and C09K classes. That gap could reflect genuine white space around encapsulation coatings, precursor chemistry or specific device integration approaches, or it could simply reflect classification practice, so it's worth confirming with a targeted search before filing. Narrow-emission nanocrystal chemistry such as Cu-Ga-S/ZnS systems, which appears in only a handful of records, is another area with room to stake a first claim.
US11785823B2, assigned to Wuhan China Star Optoelectronics Semiconductor Display Technology, claims a specific display panel structure where sub-pixel colour filter layers are themselves made of quantum dot material matched to each sub-pixel colour, with a defined upper-surface configuration on at least one layer. It does not block quantum dot material chemistry generally or displays that place quantum dots elsewhere in the stack — the claims are tied to the color-filter-layer architecture specifically. Anyone designing a competing structure should check whether their quantum dot layer sits in a functionally and structurally similar position within the panel.
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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.