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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/foldable-display-cover-window-and-hinge-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Patent Landscape · Touch & Flexible DisplayFoldable Display Cover Window and Hinge Patents
- Concentrated at the top. Five assignees hold 60.5% of the 6,261 records in scope, and ten hold 70.9% — this is a field with a short list of gatekeepers, not a fragmented one.
- Filing has cooled from its 2020 peak. Volume ran from 905 records in 2020 down to 445 by 2024, a 47% drop across 2021-2024, though 2025-2026 figures are still filling in under publication lag.
- Mechanical claims outrun display claims. G06F digital-processing classifications touch 40.0% of records, ahead of the H10K organic-semiconductor class at 28.8%, showing how much of the claim activity sits in device and structural integration rather than the panel stack itself.
6,261
Published Records
61%
Top-5 Share of All Records
-47%
Filing Growth 2021→2024
US
Leading Jurisdiction
Filing growth compares 2021 (847 records) with 2024 (445) — 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 6,261 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··7 min readSourced from Patsnap Eureka
Overview
What this landscape covers
This dataset tracks patent activity at the intersection of foldable cover materials — ultrathin glass and hard-coated polymer stacks — and the mechanical systems that let a display bend without visible crease or coating failure. The search spans filings referencing bending radius, impact resistance, hinge mechanisms and crease visibility alongside cover window and ultrathin glass terminology, capturing both the materials science and the mechanical engineering sides of the same physical problem.
Coverage runs from 2015 through the 2026-07-31 cut-off, with 6,261 published records in scope. Because publication typically lags filing by around 18 months, the most recent one to two years understate real filing activity and should be read as provisional rather than declining.
Filing volume and technology composition, 2015-2026
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Foldable Display Cover Window and Hinge covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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The Numbers
Filing trend and technology composition
Two views of the same 6,261 records: how filing volume has moved year over year, and how those records distribute across IPC subclasses.
Filing trend, 2017-2026
Annual filings rose from 361 in 2017 to a peak of 905 in 2020, then eased to 445 by 2024 — a 47% decline over that three-year span. 2025 and 2026 figures (58 in the latest year) are still incomplete under normal publication lag and should not be read as a continued fall.
IPC subclass composition
G06F (electric digital data processing) appears on 40.0% of the 6,261 records, H10K (organic semiconductors) on 28.8%, and G09F, H01L and B32B each cover roughly one record in six. Because records carry multiple classes, these shares sum to well over 100% and should be read individually, not combined.
Shares are the percentage of the 6,261 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Foldable Display Cover Window and Hinge covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
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Representative filing and most-cited prior art
Representative Record
US20230088192A1 — Foldable ultrathin glass with transparent, impact-resistant hard coating
HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITED
A foldable ultrathin glass article includes an ultrathin chemically-tempered foldable glass substrate roughly 100 microns or less thick with a compressive surface stress of at least 100 MPa. A single-layer hard coating bonded directly to one or both surfaces — without an adhesive layer — includes a silsesquioxane with a silicon-oxygen core framework. The claimed impact resistance, measured by maximum pen drop height without glass failure, runs at least four times that of the uncoated substrate.Filed by Hong Kong Applied Science and Technology Research Institute, published 2023-03-23.
Most-cited records in this landscape
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US7591783B2 | Articulation joint for video endoscope | 1,507 |
| 2 | US6577496B1 | Non-rigid mounting of a foldable display | 542 |
| 3 | US20050119527A1 | Force feedback control system for video endoscope | 534 |
| 4 | US20140232956A1 | Flexible organic light emitting display device and method for manucaturing the same | 445 |
| 5 | US20050131279A1 | Articulation joint for video endoscope | 429 |
| 6 | US20140217373A1 | Flexible display substrate, flexible organic light emitting display device and method for manufacturing the s… | 399 |
| 7 | US20050154262A1 | Imaging system for video endoscope | 308 |
| 8 | US20150382446A1 | Flexible display device with reduced bend stress wires and manufacturing method for the same | 299 |
| 9 | US20160093685A1 | Flexible display device with bend stress reduction member and manufacturing method for the same | 229 |
| 10 | US20140078462A1 | Biologically fit wearable electronics apparatus | 228 |
Citation counts inside a searched corpus favour older filings; treat this table as a map of influential prior art, not a ranking of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Foldable Display Cover Window and Hinge covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the data signals
Three read-throughs from the concentration, trend and composition figures above.
Concentration
60.5% / 70.9%
share held by top 5 / top 10 of 6,261 records
A short gatekeeper list, not a fragmented field
Five assignees account for 60.5% of all records in scope and ten account for 70.9%. Any new entrant is filing into a space where a small number of display and device makers already hold dense claim coverage across the core mechanical and materials approaches.
Ranking covers 100 companies total
Momentum
-47%
2021 (847) to 2024 (445) filings
Volume has eased from its 2020 peak
Filings peaked at 905 in 2020 and fell to 445 by 2024, a 47% decline over that span. Several of the leading assignees show sharp year-on-year drops in the latest tracked year, though this coincides with the publication-lag window and should be read cautiously rather than as a verdict on the technology's future.
2025-2026 figures still filling in
Composition
40.0% G06F
of 6,261 records classified under electric digital data processing
Device integration outweighs the panel stack
G06F classifications appear on 40.0% of records, ahead of H10K organic-semiconductor classifications at 28.8%. Structural and control claims around folding devices are as heavily contested as the display materials themselves, which matters for anyone assuming the glass or coating chemistry is the main battleground.
B32B laminate claims sit at 16.3%
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Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to foldable display cover window and hinge, with the prior art for and against each one.
Co-filing patterns
| Assignee | Co-assignee | Shared families |
|---|---|---|
| BOE Technology Group Co., Ltd. | Chengdu BOE Optoelectronics Technology Co., Ltd. | 87 |
| Samsung Electronics Co., Ltd. | Samsung SDI Co., Ltd. | 34 |
| Samsung Display Co., Ltd. | Kongju National University Industry-Academic Cooperation Foundation | 8 |
| Samsung Display Co., Ltd. | Special Materials Source, Inc. | 7 |
| BOE Technology Group Co., Ltd. | Beijing BOE Display Technology Co., Ltd. | 7 |
| BOE Technology Group Co., Ltd. | Mianyang BOE Optoelectronics Technology Co., Ltd. | 6 |
| Samsung Display Co., Ltd. | Yonsei University Industry-Academic Cooperation Foundation | 4 |
| Samsung Display Co., Ltd. | Dongwoo Fine-Chem Co., Ltd. | 4 |
Ten co-assignee pairs appear in the data; the strongest links a major Chinese display maker with its regional subsidiary, and another links a major Korean electronics group with its battery affiliate — both consistent with internal group filing rather than cross-company collaboration.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Foldable Display Cover Window and Hinge covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where the gaps sit
The leader board is dominated by display panel makers and their component affiliates, with device OEMs and a glass specialist filling out the ranked list.
Leader
2,170 records
single largest assignee
Panel makers hold the deepest portfolios
The top-ranked assignee alone accounts for a substantial share of all 6,261 records, with the distance to fifth place (183 records) illustrating how steep the drop-off is beyond the leading few filers.
Leader vs. 5th place: 2,170 vs. 183
Momentum
-91% YoY
leading assignee's latest-year filings vs. prior year
Sharp pullbacks among the biggest filers
Several of the most active assignees show steep year-on-year declines in the latest tracked year — consistent with publication lag rather than a genuine slowdown, since 2024 is the last year that can be read as complete.
Read latest-year drops against publication lag
Materials
1 named specialist
glass and coating supplier among ranked assignees
A narrow materials-side presence
Display and device manufacturers dominate the ranking; only one dedicated glass and coating specialist appears among the assignee list, suggesting that materials-side IP is either held more thinly or concentrated outside the top ranks captured here.
Ranking spans 100 companies
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| Samsung Display Co., Ltd. | 18 | -91% |
| Samsung Electronics Co., Ltd. | 7 | -76% |
| LG Display Co., Ltd. | 3 | -91% |
| BOE Technology Group Co., Ltd. | 2 | -86% |
| Huawei Technologies Co., Ltd. | 2 | -67% |
| Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | 1 | — |
| Chengdu BOE Optoelectronics Technology Co., Ltd. | 1 | -50% |
| LG Chem, Ltd. | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Foldable Display Cover Window and Hinge covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this
Three directions for turning this landscape into a working position.
Map claim scope against the leader's portfolio
With one assignee holding 2,170 of 6,261 records, understanding exactly which mechanical and materials claims it already covers is the first filter for any new filing strategy in this space.
Explore assignee portfolios in EurekaTrack the publication-lag window
2025-2026 filing counts will keep rising as records publish; re-checking the trend in six to twelve months will show whether the 2021-2024 decline continues or was a temporary pullback.
Set up trend monitoring in EurekaTest white-space claim drafts
The under-claimed branches identified here — multi-axis hinge geometries and adhesive-free coating bonding among them — are starting points for freedom-to-operate checks before drafting.
Run a white-space search in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Foldable Display Cover Window and Hinge covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions
The ranked leader accounts for 2,170 of the 6,261 records in this landscape, with the top five assignees combined holding 60.5% and the top ten holding 70.9%. The leader board is dominated by display panel manufacturers and their component affiliates rather than pure materials suppliers. This concentration means a small number of firms have built dense claim coverage across both the mechanical hinge side and the glass or coating materials side.
Filing volume peaked at 905 records in 2020 and had fallen to 445 by 2024, a 47% decline over that span. However, 2025 and 2026 counts are still incomplete because publication typically lags actual filing by around 18 months, so the apparent slowdown in the most recent years should be treated as provisional rather than a confirmed trend. The 2021-2024 window is the most reliable basis for judging real momentum.
This filing, from Hong Kong Applied Science and Technology Research Institute, covers an ultrathin chemically-tempered glass substrate around 100 microns or less thick with a compressive surface stress of at least 100 MPa, bonded to a single-layer silsesquioxane hard coating without an adhesive layer. Its claimed impact resistance, measured by pen drop height before glass failure, is at least four times that of the uncoated substrate. Anyone working on adhesive-free hard coatings for ultrathin foldable glass needs to check this claim scope closely, particularly the coating chemistry and the thickness and stress parameters.
Against the dominant G06F (40.0% of records) and H10K (28.8%) classifications, several narrower branches show thinner coverage, including multi-axis hinge geometries beyond simple book-fold designs, adhesive-free coating bonding methods at the hinge line, and standardized crease-visibility measurement approaches. These are not guarantees of open claim space, but they are areas where the dominant assignees have not built the same density of filings seen in core panel and hinge mechanism claims.
It is a top-heavy field: five assignees hold 60.5% of the 6,261 records in scope and ten hold 70.9%, while the ranking runs to 100 companies with a steep drop from the leader's 2,170 records to the tenth-place holder's 87. This pattern is typical of a technology tied closely to a handful of large display and device manufacturers who vertically integrate materials, coatings and mechanical hinge design rather than sourcing them from a broad supplier base.
Answers are grounded in the same dataset. Derived from a Patsnap search on Foldable Display Cover Window and Hinge covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.