Quantum Dot Display Reliability Patents: Leaders & White Space 2026
- Filing has gone flat, not up. The peak was 2018 at 3 families; the 2022 midpoint sits at zero, and the trend never recovers — this is a stalled claim space, not a growing one.
- Two patents carry almost all the citation weight. US20200235326A1 and its continuation US11302883B2 account for the bulk of citations in this corpus, both describing a multiple-layer QD-LED structure.
- Filing is US-centric with a thin China presence. Eight of the tracked filings route through the United States against two through China and one PCT application — durability claims are being anchored in one jurisdiction.
Filing growth compares 2021 (2 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.
What this landscape covers
Quantum dot display reliability and durability patenting sits at the intersection of materials chemistry and device engineering: claims here address blue QD degradation, photostability of the emissive layer, and the burn-in and lifetime behaviour that separates a lab demonstration from a shippable panel. The dataset tracked here is small — 11 published families against a search built on quantum dot display terms crossed with degradation, burn-in and lifetime language, restricted to the IPC classes covering OLED-adjacent device structures, nanomaterial applications and misc. materials chemistry.
That small count is itself informative. Reliability and durability claims are a narrow slice of the broader QLED patent universe, and the classes most represented — materials for miscellaneous applications and semiconductor devices — show this is being fought largely as a materials and layer-structure problem rather than a purely optical one. Publication lags filing by roughly 18 months, so the apparent drop-off in the most recent years understates real filing activity.
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Filing trend and technology composition
Two views of the same 11-family dataset: how filing has moved year over year, and which IPC subclasses the claims actually sit in.
A flat, front-loaded filing curve
Filings opened at 2 in 2017, peaked at 3 in 2018, and the 2022 midpoint reads zero — there is no second wave visible in this corpus through the 2026 cut-off.
Materials chemistry, not just optics
C09K (materials for misc. applications) and H01L (semiconductor devices) dominate the IPC spread, with H10K (organic semiconductors) close behind — reliability engineering here is being claimed at the material and layer-stack level, with B82Y nanotechnology and G06F/C01G/H05B appearing only at the margins.
Shares are the percentage of the 11 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 Reliability and Durability with Eureka
This page is one run against one query. Ask Eureka your own question about quantum dot display reliability and durability and every answer comes back with the patent numbers behind it.
Try EurekaThe filings carrying the citation weight
US20240083764A1 — QLED and preparation method thereof
The application discloses a QLED whose electron transport layer is a zinc oxide film engineered for a specific surface hydroxyl content, or alternatively carries amino- or carboxyl-ligand-terminated zinc oxide, aimed at improving external quantum efficiency and, by extension, operating stability.Filed by TCL Technology Group Corporation; published 2024-03-14.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20200235326A1 | Multiple-layer quantum-dot LED and method of fabricating same | 12 |
| 2 | WO2020029780A1 | 绿色量子点、其制备方法及其应用 | 5 |
| 3 | US11302883B2 | Multiple-layer quantum-dot LED and method of fabricating same | 4 |
| 4 | US20240016018A1 | Display device and preparation method therefor | 3 |
| 5 | US20210380878A1 | QLED and Method for Manufacturing Quantum Dot | 3 |
| 6 | CN110819348A | 绿色量子点、其制备方法及其应用 | 3 |
| 7 | US11618853B2 | QLED and method for manufacturing quantum dot | 2 |
| 8 | US11401469B2 | Alloy nanomaterial, preparation method therefor, and semiconductor device | 2 |
| 9 | US20240083764A1 | QLED and preparation method thereof | 1 |
Citation counts inside a searched corpus favour older filings; treat rank here as a signal of influence on the field, not 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. Publication numbers are shown where the record carries one (9 of 9 rows); clicking a row searches Eureka by that number.
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Three readings of the same evidence: filing momentum, citation concentration, and jurisdictional spread.
The curve never restarted
Filing opened at 2 in 2017, peaked at 3 in 2018, and the 2022 midpoint sits at zero. Nothing in this corpus shows a second wave of durability-specific filing through the 2026 cut-off.
Influence sits with one layer-structure family
US20200235326A1 and its continuation US11302883B2, both covering a multiple-layer quantum-dot LED, hold the largest citation counts in the set — evidence of a foundational structure claim that later filings had to work around.
Filing is concentrated in one office
Eight records were filed at the United States, two at China, and one via the PCT route. Reliability and durability claims in this space are being anchored predominantly in a single jurisdiction.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to quantum dot display reliability and durability, with the prior art for and against each one.
Assignees and where they sit
With only 11 families in scope, no single organisation shows sustained recent-year output — the field reads as early positioning rather than an active filing race.
Najing Technology Co., Ltd. (NAJING TECHNOLOGY)
Appears among the tracked assignees with no filings in the most recent year captured, consistent with the corpus-wide slowdown rather than any single company pulling back.
TCL Technology Group Corporation (TCL Technology Group)
Holds the representative filing in this dataset, US20240083764A1, covering a hydroxyl-tuned zinc oxide electron transport layer — a materials-level approach to efficiency and stability.
Najing Technology Co., Ltd. + Zhejiang University
The only co-assignee pair with more than one shared family in this dataset, pointing to an academic-industry collaboration route for QD photostability work rather than pure in-house R&D.
| Assignee | Recent year | YoY |
|---|---|---|
| Najing Technology Co., Ltd. | 0 | — |
| TCL Technology Group Corporation | 0 | — |
| Zhejiang University | 0 | — |
| 10644137 Canada Inc. | 0 | — |
| Anhui Dongchao Technology Co., Ltd. | 0 | — |
Where to take this analysis
A landscape this size is a starting point for a freedom-to-operate check, not a finished answer.
Map the zinc oxide ETL claim boundary
TCL's hydroxyl-content and ligand-termination claims on zinc oxide electron transport layers look like the tightest recent claim in the set — worth checking exact compositional ranges before filing anything adjacent.
Explore in EurekaWatch the academic-industry co-filing route
The only repeated co-assignee pair in this corpus links a materials company to a university lab. That pattern is worth tracking for early signals of where photostability chemistry work is heading next.
Explore in EurekaReassess after the next publication cycle
Because publication lags filing by roughly 18 months, the flat 2022–2026 trend in this dataset should be re-run once more recent filings clear publication, before concluding the field has genuinely gone quiet.
Explore in EurekaCommon questions about this landscape
This dataset tracks 11 published patent families matching search terms for quantum dot display degradation, burn-in and lifetime, restricted to IPC classes covering QD device structures and related materials chemistry. That is a small, narrow slice of the broader QLED patent universe, since it excludes general QLED manufacturing and optical-design filings that do not specifically address reliability or durability. Because publication lags filing by roughly 18 months, the true count for the most recent one to two years is understated in any snapshot taken today.
Citation concentration in this corpus points to a multiple-layer quantum-dot LED structure, published as US20200235326A1 and continued as US11302883B2, as the most-cited pair. Citation counts inside a searched corpus tend to favour older filings simply because they have had more time to accumulate references, so this is best read as historical influence rather than a claim about which patent matters most today. TCL's more recent zinc oxide electron-transport-layer filing (US20240083764A1) is the clearest example of newer, materials-specific durability work in the set.
Based on the IPC and citation spread in this dataset, blue QD photostability shows up as a thin, under-claimed branch rather than a heavily fenced one. The corpus is dominated by broader materials-chemistry and layer-structure classes (C09K, H01L, H10K), with no concentrated cluster specifically targeting blue-emitter photostability additives. That does not mean the space is empty — it means a freedom-to-operate search focused specifically on blue-emitter stabilisation chemistry is worth running before assuming either way.
In this dataset, filing peaked in 2018 at 3 families and read as zero at the 2022 midpoint, with no recovery visible through the 2026 cut-off. Some of that apparent slowdown is a measurement artefact: publication typically lags filing by around 18 months, so recent years are always undercounted at the time of any snapshot. Even accounting for that lag, the absence of a second wave suggests reliability-specific claims have not attracted the renewed filing activity seen in adjacent QLED manufacturing topics.
Of the tracked filings, eight route through the United States, two through China, and one via the PCT system. That skew suggests durability and reliability claims in this space are currently being anchored predominantly in the US, with comparatively little multi-territory filing strategy visible so far. Anyone assessing freedom to operate outside the US should treat the China and PCT coverage in this dataset as thin rather than representative of full global filing activity.
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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.