Quantum Dot Colour Conversion Films Patents: Top Companies & Trends 2026
- One filer holds 26 of 50 records in scope, and the top 5 assignees together account for 90.0% of all 50 records — this field is concentrated, not fragmented.
- G02F optical control claims cover 88.0% of records, while display-control circuitry (G09G, 4.0%) and light-emitting semiconductor structures (H10H, 6.0%) remain comparatively open.
- Filing peaked in 2017 at 12 records, and the 2021-to-2024 span shows a -100% change — though 2025-2026 counts are still filling in due to publication lag.
Filing growth compares 2021 (2 records) with 2024 (0) — 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 50 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Quantum dot colour conversion films sit at the intersection of nanomaterial chemistry and display optics: a layer of quantum dots absorbs blue backlight and re-emits red and green light to widen colour gamut. The claims in this dataset cluster around cadmium-free compositions, photostability under prolonged blue-light exposure, barrier film requirements that keep oxygen and moisture from degrading the dots, and patterning methods such as inkjet deposition. Self-absorption loss — where emitted light is reabsorbed by neighbouring dots — is a recurring technical problem addressed across several of these branches rather than confined to one.
The 50 records in scope span receiving offices in the United States, China, Europe, WIPO/PCT filings, Australia and Austria, reflecting a supply chain that spans display panel makers, materials chemistry specialists and film converters.
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Filing trends and technology composition
The figures below are drawn directly from the 50 published records and their IPC classifications in scope for this search.
Filing trend: a 2017 peak, then decline
Filings rose to a peak of 12 records in 2017, then tapered. The 2021-to-2024 window shows a -100% change, a genuine three-year comparison; years after 2024 are still incomplete because publication typically lags filing by around 18 months, so recent-year counts will keep rising as more records surface.
IPC composition: optics dominates, circuitry is thin
G02F (optical control and modulation) appears in 88.0% of the 50 records, confirming that most claims are written around the optical film stack itself rather than the driving electronics. F21V, C09K and H01L each sit near a quarter of records, while G09G (display control circuits) and H10H (light-emitting semiconductor devices) are the thinnest classes, at 4.0% and 6.0% respectively.
Shares are the percentage of the 50 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Quantum Dot Colour Conversion Films with Eureka
This page is one run against one query. Ask Eureka your own question about quantum dot colour conversion films and every answer comes back with the patent numbers behind it.
Try EurekaRepresentative and most-cited filings
WO2017142781A1 — Matrix for quantum dot film article
Filed by 3M Innovative Properties Company, this application describes a quantum dot film built on an interpenetrating polymer network of cured amine-epoxy resin and radiation-cured resorcinol dimethacrylate. The formulation is claimed to improve luminescence retention as the film ages.Filed 2017-08-24. Abstract text is quoted from the published application.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US20150124195A1 | Backlight unit for display devices | 51 |
| 2 | US20180120492A1 | Radiation Absorbing Element for Increasing Color Gamut of Quantum Dot Based Display Devices | 18 |
| 3 | CN109401754A | 一种具有高蓝光吸收率的量子点及其制备方法 | 9 |
| 4 | US9658489B1 | Backlight units for display devices | 9 |
| 5 | US20200033527A1 | Methods of improving efficiency of displays using quantum dots with integrated optical elements | 8 |
| 6 | US20190064603A1 | Using Multiple Excitation Wavelengths in Nanostructure Based Display Devices | 8 |
| 7 | US20170269432A1 | Backlight Units for Display Devices | 8 |
| 8 | US20160307519A1 | White Point Uniformity in Display Devices | 7 |
| 9 | WO2017142781A1 | Matrix for quantum dot film article | 6 |
| 10 | WO2015069640A1 | Backlight unit for display devices adapted to reduce light leakage | 5 |
Citation counts are drawn from the searched corpus and favour older filings; treat them as a signal of influence rather than current 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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Three patterns stand out once the ranking, trend and class data are read together.
Filing is concentrated at the top
With the leader alone holding 26 of 50 records and the top 5 combined reaching 90.0% of all records in scope, this is not a fragmented field with room for an easy foothold. A new entrant is filing into territory already claimed densely by a small group.
Optical film claims dominate the class mix
Nearly nine in ten records touch G02F, the optical control and modulation class, confirming that most competitive activity is written around the film stack and its optical behaviour rather than around backend circuitry or panel integration.
Peak filing has passed, recent years still incomplete
Filing peaked in 2017 at 12 records and fell sharply through the last fully-countable window, 2021 to 2024. Counts for 2025 and 2026 are not yet reliable indicators of direction because publication lags filing by roughly 18 months.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to quantum dot colour conversion films, with the prior art for and against each one.
Who is filing, and where the gaps sit
The ranked leaders here comprise the 12 companies the data endpoint returns for this search — not a top-50 or top-100 cut. Recent-year momentum is thin across the board: only one assignee, Korrus, shows any activity in the latest year, and even that is a single record.
One assignee dominates the ranking
The top-ranked filer holds roughly half of all records in scope, a share far ahead of the rest of the ranked list. That level of dominance typically means the core film-composition and barrier-layer claims are already staked out.
Collaboration is limited and thin
Only four co-assignee pairs appear across the dataset, and the strongest of these links two records. Most activity in this field is filed by single organisations rather than joint ventures or research partnerships.
Recent-year activity has nearly stopped
Across the tracked assignees, latest-year filing counts are at or near zero, with Korrus the only name showing any activity. This is consistent with the broader -100% trend over the 2021-to-2024 window, though later years remain incomplete.
| Assignee | Recent year | YoY |
|---|---|---|
| Korrus Inc. | 1 | — |
| Nanosys Inc. | 0 | — |
| Shoei Chemical Industry Co., Ltd. | 0 | — |
| Hengshan Jiacheng New Material Co., Ltd. | 0 | — |
| Weixian Jubang New Material Technology Co., Ltd. | 0 | — |
| Shenzhen Sirui Optoelectronics Technology Co., Ltd. | 0 | — |
| Hebei Oulaide Optoelectronic Materials Technology Co., Ltd. | 0 | — |
| Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 0 | — |
Where to take this analysis
The dataset points to a field with occupied core claims and a few thinner branches. The next steps depend on whether the goal is freedom-to-operate or a filing strategy.
Map claims against the leader's portfolio
With one assignee holding roughly half of all records, a claim-by-claim comparison against that portfolio is the fastest way to see what is actually blocked versus merely adjacent.
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The thinner classes — display-control integration and light-emitting semiconductor hybrids — warrant a targeted prior-art search before drafting, since low density can mean either opportunity or simply less commercial interest.
Run a white-space search in EurekaCommon questions about this landscape
One assignee holds 26 of the 50 records in scope for this dataset, well ahead of the rest of the ranked list. The top 5 assignees combined account for 90.0% of all 50 records, and the top 10 account for 100.0%, meaning the entire dataset is captured by a relatively small group of filers. This level of concentration suggests that a new entrant should expect to design around, rather than beside, the leading portfolio.
Filing peaked in 2017 at 12 records and has declined since, with the 2021-to-2024 window showing a -100% change, the most recent period that can be treated as a complete comparison. Filings recorded for 2025 and 2026 are not yet reliable because patent publication typically lags the actual filing date by around 18 months. Readers should treat the last two years of any chart as a floor, not a ceiling, on real activity.
The claims cluster around cadmium-free quantum dot compositions, photostability under sustained blue-light exposure, barrier film performance that keeps moisture and oxygen from degrading the dots, and patterning methods including inkjet deposition. Self-absorption, where emitted light is reabsorbed before it exits the film, appears as a recurring problem addressed across several of these branches rather than isolated to one. Optical control and modulation claims (IPC class G02F) appear in 88.0% of the 50 records, making it by far the most heavily claimed area.
The thinnest IPC classes in this dataset are G09G, display control circuitry, at 4.0% of records, and H10H, light-emitting semiconductor device structures, at 6.0%. These low shares can mean either genuine technical opportunity or simply less commercial interest in that combination, so they warrant a targeted prior-art check before drafting rather than being treated as automatically open. Co-assignee activity is also thin, with only four identified pairs, suggesting limited joint development work a new entrant could partner into.
WO2017142781A1 claims a specific matrix chemistry: an interpenetrating polymer network built from cured amine-epoxy resin and a radiation-cured resorcinol dimethacrylate component, aimed at improving luminescence retention as the film ages. It blocks that specific resin-system combination and closely similar formulations, not quantum dot films generally. Anyone working on barrier or matrix chemistry for QD films should review this filing's exact claim language before selecting a resin system, since alternative polymer networks or curing chemistries would likely sit outside its scope.
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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.