QD-OLED and Quantum Dot Display Patents: Top Filers & Trends 2026
- 54.1% concentration at the top. The top 5 of 23 ranked assignees hold 20 of the 37 records in scope — filing is concentrated, not fragmented.
- Filing peaked in 2022, then flattened. The trend runs from 0 in 2017 to a peak of 8 in 2022, with no clear post-peak acceleration among tracked leaders.
- China dominates the filing offices. 17 of the tracked filings route through China, versus 11 in the United States, 7 via WIPO/PCT and 2 in Europe.
What this landscape covers
This dataset tracks 37 published patent records filed between 2015 and mid-2026 that combine QD-OLED or quantum dot display architecture claims with specific technical hooks: blue OLED lifetime, QD patterning, color gamut, blue light leakage and cadmium-free QD material. It is a narrow, claim-language-defined slice of the broader quantum dot display field, not a count of every QD or OLED filing in existence. Because publication lags filing by roughly 18 months, the 2025 and 2026 figures in this dataset are undercounts and will rise as later filings publish.
Read the concentration and trend figures as a snapshot of claim occupancy in this specific technical intersection, not as a verdict on the wider display industry. A dense IPC class means that claim space is already occupied by existing filings — it does not mean the underlying technology is mature or that further filing there is pointless, only that a new claim has to work harder to clear prior art.
Filing trend and technology composition
Two views of the same 37 records: filings by year, and the IPC subclasses those filings sit in. Because a single record can carry several IPC classes, the class shares below add up to more than 100% of the record total — that is expected.
Filing activity, 2017–2026
Filings rose from 0 in 2017 to a peak of 8 in 2022, the midpoint year. Activity has not built on that peak since; 2026 is a partial year at 1 filing, and figures for 2025-2026 will be revised upward as later publications land.
Technology composition by IPC subclass
H01L (semiconductor devices) is the largest single class at 54.1% of the 37 records, followed by G02F (optical control and modulation) at 29.7% and H10H (light-emitting semiconductor devices) at 18.9%. Smaller classes — C09K, G02B, B82Y and C01G — each sit at 5.4% to 8.1%, marking narrower material- and nanotechnology-specific claim territory.
Shares are the percentage of the 37 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on QD-OLED and Quantum Dot Display Architectures with Eureka
This page is one run against one query. Ask Eureka your own question about qd-oled and quantum dot display architectures and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records in this landscape
Quantum dot color conversion method and layer structure (WO2026107860A1)
Filed by Southern University of Science and Technology, this application describes a color conversion method that fills wall-separated micro-regions above blue Micro-LEDs with red, green, blue and cyan-blue quantum dot inks, extending the conventional RGB triangular color gamut to an RGBC quadrilateral gamut. The stated aim is a larger color coverage area than standard RGB, with reduced conversion loss and more uniform full-color brightness.Filed 2026-05-28 — one of the most recent records in scope, illustrating where active claim-drafting is happening now.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN110112172A | 基于氮化镓纳米孔阵列/量子点混合结构的全色微米LED显示芯片及其制备方法 | 43 |
| 2 | US20230155075A1 | Light emitting devices including a quantum dot color conversion material and method of making thereof | 10 |
| 3 | WO2022207313A1 | Materials, process and fabrication technology for quantum dot color conversion filter by sensitized polymeriz… | 9 |
| 4 | CN112002744A | 一种显示面板及其制作方法 | 7 |
| 5 | CN109100888A | 一种液晶显示器件、一种像素化量子点颜色转换膜及其制备方法 | 6 |
| 6 | US20200073178A1 | Increasing color gamut performance and efficiency in quantum dot color conversion layers | 4 |
| 7 | CN115207067A | 一种显示面板及显示装置 | 3 |
| 8 | CN113449411A | 面向单色量子点色转换层的蓝光泄露率和光密度计算方法 | 2 |
| 9 | CN113540319A | 混合多种颜色量子点的光色转换层的光色转换分析方法 | 2 |
| 10 | CN113255200A | 混合散射粒子的单色量子点色转换层的光学参数计算方法 | 2 |
Citation counts inside a searched corpus favour older records that have had more time to accumulate citations — treat this as a signal of influence, 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. Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once the records are broken down by assignee, class and geography.
Filing sits with a small group of repeat filers
The top 5 of 23 ranked assignees account for 20 of the 37 records (54.1%), and the top 10 account for 31 records (83.8%). That leaves a short tail below rank 10 — a field where a handful of organisations have done most of the claim-staking.
Activity has flattened since the 2022 peak
Filings climbed from 0 in 2017 to a peak of 8 in 2022, the trend's midpoint year, then did not sustain that pace. None of the tracked leading assignees recorded a filing in the most recent year, though publication lag means the last one to two years are still filling in.
China leads filing volume, the US is a strong second
Of the tracked filings, 17 route through China's patent office, 11 through the United States, 7 via WIPO/PCT and 2 through the EPO. That split points to where enforcement and freedom-to-operate checks matter most for this claim space today.
Claims cluster in semiconductor and optical-control classes
Over half the records touch H01L (semiconductor devices), and nearly a third touch G02F (optical control and modulation). Material-specific classes like C09K and C01G, and nanotechnology class B82Y, sit well below 10% each — a narrower, less-crowded claim surface.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to qd-oled and quantum dot display architectures, with the prior art for and against each one.
Who is filing, and where the gate sits
The ranked assignee list runs 23 companies deep, with volume concentrated at the top and a long tail of single- or low-filing entrants below rank 10.
A single leader sets the pace
The top-ranked assignee holds 8 of the 37 records in scope, well ahead of fifth place at 3 and tenth place at 2. That gap suggests a sustained, multi-year filing programme rather than opportunistic filing.
A tight mid-field below the leader
Ranks two through ten sit close together, each holding two to a few records. This is a field where several organisations — universities and display manufacturers alike — have staked overlapping but modest claim positions.
Cross-entity filing is limited but present
Five co-assignee pairs appear in the dataset, each linking two organisations on shared filings — including university-lab pairings and a corporate parent-subsidiary pair. Co-filing is the exception rather than the norm here.
| Assignee | Recent year | YoY |
|---|---|---|
| Nanosys Inc. | 0 | — |
| Sony Group Corporation | 0 | — |
| Fuzhou University | 0 | — |
| Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 0 | — |
| Southern University of Science and Technology | 0 | — |
| Korea Electronics and Telecommunications Research Institute (ETRI) | 0 | — |
| Mindu Innovation Laboratory | 0 | — |
| Shi-Cheng Laboratory for Information Display & Visualization | 0 | — |
Where to take this next
The landscape points to a concentrated core and a thinner, more open edge. Two directions are worth checking before committing engineering or filing budget.
Check freedom-to-operate against the top 10
With 83.8% of the 37 records held by the top 10 of 23 ranked assignees, any new filing in the H01L or G02F core should be checked against those specific claim sets before drafting.
Run a freedom-to-operate check in EurekaTrack the under-claimed branches
Classes like C09K, B82Y and C01G sit at 5.4% to 8.1% of records — narrower territory where a well-drafted first claim faces less prior art density.
Explore white space in EurekaCommon questions about this landscape
Within this 37-record dataset, filing is concentrated: the top-ranked assignee alone holds 8 records, and the top 5 of 23 ranked assignees together hold 20 records, or 54.1% of the total. The top 10 account for 83.8% of all records, leaving a long tail of single- or low-filing entrants below that. This concentration reflects a specific claim-language search — combining QD-OLED architecture terms with hooks like blue OLED lifetime and QD patterning — so it will not match a broader count of every quantum dot patent filed globally.
Filing activity in this dataset rose from 0 records in 2017 to a peak of 8 in 2022, then did not build further; recent-year momentum figures show none of the tracked leading assignees filing in the most recent year. Because patent publication typically lags filing by around 18 months, the 2025 and 2026 counts are undercounts and will rise as later filings publish. Based on current data the trend reads as flat to declining since 2022 rather than accelerating.
China is the largest receiving office in this dataset with 17 records, ahead of the United States at 11, WIPO/PCT filings at 7, and the European Patent Office at 2. That distribution suggests China and the US are the two jurisdictions where freedom-to-operate and enforcement risk are most relevant for this specific claim space today. The WIPO figure represents international-phase filings that have not yet been broken out by national phase in this dataset.
WO2026107860A1, filed by Southern University of Science and Technology and published 2026-05-28, describes a quantum dot color conversion method that fills wall-separated regions above blue Micro-LEDs with red, green, blue and cyan-blue quantum dot inks. The added cyan-blue channel extends the conventional RGB triangular color gamut to a larger RGBC quadrilateral gamut, aiming to reduce conversion loss and improve brightness uniformity. As one of the most recent filings in scope, it illustrates active claim-drafting around four-channel color conversion rather than settled, heavily-litigated territory.
The smaller IPC classes in this dataset — C09K (materials for miscellaneous applications), G02B (optical elements), B82Y (nanotechnology applications) and C01G (compounds of other metals) — each cover only 5.4% to 8.1% of the 37 records, well below the 54.1% share held by H01L. That gap points to lighter claim density around cadmium-free QD material formulation, nanotechnology-specific encapsulation, and optical element integration compared to the crowded semiconductor-device core. A narrower claim in one of these branches faces less prior art to clear, though it should still be checked against the specific assignees active there.
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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.