Automotive Lighting Thermal Management Patents: Leaders & Trends 2026
- No dominant filer. the leader holds only 2 of 37 records, and the top 5 combined account for just 16.2% of all records in scope — this is a fragmented field, not a concentrated one.
- Filing has plateaued, not grown. 2021 and 2024 both sit at 3 filings a year, a 0% span, after peaking at 5 in 2022 — read 2025-2026 as undercounted given an 18-month publication lag.
- Claims cluster on structure, not process. F21V lighting-device components appear in 94.6% of the 37 records, while cleaning, filtration and forced-air branches each sit under 10%.
Filing growth compares 2021 (3 records) with 2024 (3) — 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 37 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
This review covers 37 published records matched on headlamp thermal management and LED heat-dissipation language, cross-referenced against claim terms such as junction temperature, heat sink design, condensation, ventilation, lens material heat and derating at high temperature. The scope spans 2015 to the 2026-07-31 cut-off, with filings concentrated almost entirely through Chinese receiving offices.
The field reads as a components problem rather than a systems one: nearly every record touches lighting-device components (F21V) and light-source form factors (F21Y), while thermal-adjacent process branches — cleaning, filtration, active airflow — appear in only a handful of records each. That split matters for anyone deciding where to file next.
Filing trend and technology composition
Two views of the same 37 records: how filing activity has moved year over year, and how claims distribute across IPC subclasses.
Filing trend, 2017-2026
Annual filings rose from 2 in 2017 to a peak of 5 in 2022, then settled at 3 in both 2021 and 2024 — a 0% span across that window. Treat 2025 and 2026 as understated: publication typically lags filing by around 18 months, so the most recent years will fill in as data catches up.
IPC subclass composition
F21Y (light-source form) and F21V (lighting device components) together anchor the field, present in 100.0% and 94.6% of the 37 records respectively. Non-portable lighting devices (F21S, 18.9%) and LED/non-electric light sources (F21K, 13.5%) form a secondary tier, while cleaning (B08B), lighting use (F21W), separation processes (B01D) and pump-based cooling (F04D) each sit at or below 8.1% — these are the thinner, more open branches.
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 Automotive Lighting Thermal Management with Eureka
This page is one run against one query. Ask Eureka your own question about automotive lighting thermal management and every answer comes back with the patent numbers behind it.
Try EurekaMost-cited records and a representative filing
CN203298251U — LED lamp heat-dissipation aluminium profile
This utility model covers an LED lamp heat-dissipation aluminium profile built from a heat-dissipation body with strip-form heat-dissipation fins set around the outer periphery of a heat-dissipation tube, with a mounting face for the circuit board on one side. The aluminium construction and finned geometry increase surface area and thermal conductivity, moving heat away from the LED junction faster, which the filing states lowers junction temperature and extends LED service life. The shaped profile is also presented as avoiding the uneven assembly that manual mounting can introduce.Filed by Zengcheng Guangmei Aluminium Factory, dated 2013-11-20.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | CN209042006U | 一种LED灯散热系统 | 4 |
| 2 | CN103423722A | LED灯散热结构及采用该散热结构的LED节能灯 | 3 |
| 3 | CN214369710U | 一种高散热性灯具 | 2 |
| 4 | CN104534321A | 一种LED灯具散热结构 | 2 |
| 5 | CN221279430U | 一种高效的LED灯具散热结构 | 1 |
| 6 | CN219640199U | 一种LED灯散热机构 | 1 |
| 7 | CN115654386A | 一种LED灯专用散热器 | 1 |
| 8 | CN217714613U | 一种LED灯散热结构 | 1 |
| 9 | CN208519731U | 一种应用于LED灯组散热的均热板 | 1 |
| 10 | CN208011633U | 一种模组散热器 | 1 |
Citation counts favour older filings in any searched corpus — read them as a signal of influence within this set, not as a measure 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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The numbers point to a field where structural heat-sink design is well-trodden and everything adjacent to it — active cooling, condensation control, cleaning — is comparatively open.
No single filer controls the space
The leader holds only 2 of the 37 records in scope, and the top 5 combined account for 16.2% of all records; the top 10 reach 29.7%. That leaves a long tail of single- or double-filing entrants rather than a small set of blocking incumbents.
Filing has plateaued, not accelerated
Annual filings held at 3 in both 2021 and 2024 after peaking at 5 in 2022. Recent-year figures for named assignees show several already back to 0 in the latest year, but the 18-month publication lag means 2025-2026 numbers are not yet a reliable read on direction.
Structural components dominate the claim space
F21V (lighting device components) and F21Y (light-source form) between them cover almost every record. Process-oriented branches — cleaning (B08B, 8.1%), lighting use (F21W, 8.1%), separation (B01D, 5.4%) and pump cooling (F04D, 2.7%) — are each claimed by only a handful of filers.
Filing is almost entirely China-routed
China accounts for 36 of the 37 receiving-office records, with Taiwan holding the remaining one. Anyone benchmarking freedom-to-operate outside these two jurisdictions is working from a near-empty comparison set within this dataset.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to automotive lighting thermal management, with the prior art for and against each one.
Who is filing, and where the field is still open
37 assignees are ranked in this dataset, led by a filer with just 2 records — a sign of a fragmented, still-forming competitive set rather than an established hierarchy.
The top spot is a narrow lead
The highest-ranked assignee holds only 2 of the 37 records in scope, barely ahead of the field. No filer here has built the kind of dense claim thicket that would force a design-around strategy on its own.
Most entrants file once or twice
With the top 10 combined reaching only 29.7% of all 37 records, the bulk of this landscape is single- or double-filing entrants — smaller lighting manufacturers and a handful of universities rather than a concentrated set of repeat filers.
Recent activity has gone quiet for named filers
Several assignees tracked for recent-year momentum, including one showing a -100% year-on-year change, report 0 filings in the latest year. Given the publication lag, this is as likely to reflect filings still working through the pipeline as an actual pullback.
| Assignee | Recent year | YoY |
|---|---|---|
| Hangzhou Dianzi University | 0 | — |
| Qingdao Lanhai Yangguang Energy Co., Ltd. | 0 | -100% |
| Chongqing Liangzhi Optoelectronic Technology Co., Ltd. | 0 | — |
| Liaoning Longteng Technology Development Co., Ltd. | 0 | — |
| Southwest University of Science and Technology | 0 | — |
| Suzhou Guoke Medical Engineering Technology Development (Group) Co., Ltd. | 0 | — |
| Suzhou Jiayida Electrical Appliances Co., Ltd. | 0 | — |
| Zhai Songbai | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the goal is freedom-to-operate, sourcing, or drafting.
Check freedom-to-operate against the cited cluster
The most-cited records concentrate around finned aluminium heat-sink structures. Before filing a structural heat-sink claim, work through how it differs from that cluster rather than the ranking as a whole.
Explore citation mapping in EurekaWatch the under-claimed branches, not just the leaders
Condensation control, passive cooling and filtration-assisted ventilation carry a fraction of the filings that structural components do. A first-mover claim there faces a thinner prior-art field.
Run a white-space search in EurekaRe-check the trend once 2025-2026 fill in
The 0% growth reading between 2021 and 2024 is the only complete comparison available; treat anything drawn from 2025 onward as provisional until the publication lag closes.
Set a filing-trend alert in EurekaCommon questions about this landscape
No single company dominates this field. The top-ranked assignee in this dataset holds only 2 of the 37 records in scope, and the top 5 assignees combined account for just 16.2% of all records. That makes this a fragmented landscape with a long tail of entrants filing once or twice, rather than one controlled by a small number of blocking incumbents. Anyone assessing competitive risk here should look at the specific claim clusters a filer occupies rather than assume a size-based hierarchy.
Filing activity peaked at 5 records in 2022 and has since settled, with 2021 and 2024 both at 3 filings — a flat 0% span across that three-year window. It would be a mistake to read the 2025-2026 figures as a decline, because publication typically lags filing by around 18 months, so the most recent years in any patent dataset are always undercounted. The safest complete comparison right now is the 2021-to-2024 window, which shows a plateau rather than clear growth or contraction.
Lighting device components (IPC class F21V) and light-source form factors (F21Y) dominate, appearing in 94.6% and 100.0% of the 37 records respectively. That reflects a field built around structural heat-sink and housing design. Process-oriented approaches — cleaning, filtration, active ventilation and pump-driven cooling — each appear in under 10% of records, meaning claim density there is much lower even though the underlying engineering problem is well recognised.
The clearest gaps sit adjacent to the dense structural core: condensation control inside sealed lamp housings, fan-free passive convection paths, lens material heat tolerance and derating behaviour, and filtration-assisted ventilation all carry a fraction of the filings that structural heat-sink claims do. These are technically specific sub-areas rather than the whole field being open, and a first claim there would need to sit clearly outside the finned-aluminium designs that dominate the cited cluster.
Yes. Of the 37 records in scope, 36 came through a Chinese receiving office and 1 through Taiwan. Readers benchmarking filing strategy or freedom-to-operate in other jurisdictions should treat this dataset as describing Chinese-market filing behaviour specifically, since there is almost no comparison data here for other regions.
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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.