Colour Electrophoretic Displays Patents: Top Companies & Trends 2026
- 45.0% of all 624 records sit with just five assignees, so freedom-to-operate work should start with those portfolios, not a broad prior-art sweep.
- Filings grew 37% from 2021 to 2024 (30 to 41 records), the last year the data can be treated as complete given publication lag.
- G02F carries 75.6% of records, but adjacent classes like B06B (2.1%) and C09D (3.5%) show far thinner coverage worth checking before you draft.
Filing growth compares 2021 (30 records) with 2024 (41) — 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 624 records in scope (CR5), not by the ranked leaders only.
What's being claimed, and by whom
Colour electrophoretic display patents cluster around particle mobility, driving waveforms and microcapsule construction — the mechanics that determine how fast a pixel switches colour and how well it holds a white state. The search scope spans 624 published records from 2015 through the 2026 cut-off, drawing on optical control claims (G02F), display driver circuitry (G09G) and a smaller set of ink-formulation and mechanical-actuation filings. Family-level counts, not raw document counts, are used throughout so that continuation filings and multi-jurisdiction copies don’t inflate any single assignee’s footprint.
Filing activity has not been flat: the field moved from 31 records in 2017 to a peak of 41 in 2024, with the three years to that peak showing 37% growth. Recent years past 2024 look lower only because publication typically lags filing by around 18 months — that understatement applies once, here, and should be kept in mind whenever the trend chart is read.
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Filing trend and technology composition
Two views of the same 624-record set: how filing volume has moved year over year, and which IPC subclasses carry the claims.
Filing trend, 2017-2026
Volume rose from 31 records in 2017 to a peak of 41 in 2024, including 37% growth across 2021-2024. Treat 2025 and 2026 as still filling in rather than as a slowdown.
Technology composition by IPC subclass
G02F (optical control & modulation) appears in 75.6% of the 624 records and G09G (display control circuits) in 42.1%; smaller subclasses such as B41J, C09D and B06B each sit under 5% of records, marking where claim density thins out.
Shares are the percentage of the 624 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Colour Electrophoretic Displays with Eureka
This page is one run against one query. Ask Eureka your own question about colour electrophoretic displays and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited prior art in this space
Color electrophoretic display and display method of the same
A color electrophoretic display and a display method thereof are provided. The color electrophoretic display comprises an achromatic color particle and a plurality of chromatic color particles. The display method comprises turning on a stylus mode, providing an assigned stylus color, sensing a movement of the stylus to output a black trace, and transferring the black trace into a color trace of the assigned stylus color when the stylus movement stops. The black trace is shown when the achromatic color particle and the chromatic color particles move toward a top electrode, and a refresh time of the color of the black trace is smaller than 50 ms.Filed by TPK Touch Solutions (Xiamen); published 2025-05-01.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US7038655B2 | Electrophoretic ink composed of particles with field dependent mobilities | 566 |
| 2 | US20030132908A1 | Electrophoretic ink composed of particles with field dependent mobilities | 393 |
| 3 | US20060017659A1 | Electronic paper display system | 193 |
| 4 | US8786935B2 | Color electrophoretic display | 185 |
| 5 | US7283119B2 | Color electrophoretic display device | 177 |
| 6 | US9013783B2 | Color electrophoretic display | 176 |
| 7 | US9146439B2 | Color electrophoretic display | 174 |
| 8 | US6373461B1 | Piezoelectric transducer and electrophoretic ink display apparatus using piezoelectric transducer | 166 |
| 9 | US20030231162A1 | Color electrophoretic display device | 155 |
| 10 | US7684108B2 | Process for the manufacture of electrophoretic displays | 152 |
Citation counts reflect influence inside this searched corpus and skew toward older filings; they are not a measure of current commercial weight.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the numbers mean for a filing decision
Three read-throughs from the concentration, growth and classification figures above.
The top of the field is genuinely concentrated
Five assignees hold 281 of the 624 records in scope, 45.0% of the total. A freedom-to-operate check that starts with those five portfolios covers nearly half the field before looking at anyone else.
Filing activity climbed steadily into 2024
Records rose from 30 in 2021 to 41 in 2024, a 37% increase over that span and the field's peak year so far. Later years understate true activity because of an approximately 18-month publication lag, not because interest has dropped.
Optical control claims dominate; mechanical actuation is thin
G02F appears in 75.6% of the 624 records, more than any other subclass, while B06B (mechanical vibration generation, relevant to particle-jostling actuation methods) sits at just 2.1%. That gap is a reasonable place to look for open claim space rather than crowded prior art.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to colour electrophoretic displays, with the prior art for and against each one.
The assignee landscape
The ranking covers 100 companies returned by the data endpoint, not a fixed top-50 or top-100 cut. Filing counts here are family counts within the 624-record scope.
One assignee sits well ahead of the field
The leading assignee holds 109 records, more than three times the fifth-place count of 32. That gap suggests a single dominant portfolio rather than a tight cluster at the top.
Positions five through ten are closer together
Fifth place holds 32 records and tenth place 14, a much narrower spread than the gap between the leader and fifth place. Competitive attention below the top slot is more evenly distributed.
Recent-year activity has slowed even for the leader
The leading assignee filed 5 records in the latest year, down 44% year-on-year, and several other major assignees show zero recorded filings in that same latest year. Given the roughly 18-month publication lag, this is as likely to reflect incomplete recent data as an actual pullback.
| Assignee | Recent year | YoY |
|---|---|---|
| E Ink Corporation | 5 | -44% |
| Hewlett Packard Development Company, L.P. | 0 | — |
| BOE Technology Group Co., Ltd. | 0 | — |
| Xerox Corporation | 0 | — |
| Samsung Electro-Mechanics Co., Ltd. | 0 | — |
| E Ink Holdings Inc. | 0 | — |
| Seiko Epson Corporation | 0 | — |
| Ricoh Company, Ltd. | 0 | — |
Where to take this next
The dataset points to specific next steps depending on whether the goal is clearance, drafting or portfolio tracking.
Check freedom-to-operate against the top five first
With 45.0% of all 624 records held by five assignees, a clearance search that starts there covers nearly half the field's claim space before widening out.
Explore assignee portfoliosDraft around the thin classes, not the dense one
G02F carries 75.6% of records; B06B, C09D and B41J each sit under 5%. New claims aimed at particle actuation, ink formulation or print-integrated output face less prior art to design around.
Review IPC compositionTrack the leader's recent slowdown before assuming it's real
A 44% year-on-year drop for the leading assignee, set against an 18-month publication lag, is better treated as an open question than a confirmed retreat until later filings publish.
Monitor filing trendsCommon questions on colour electrophoretic display patents
One assignee leads the ranked field with 109 records, well ahead of the fifth-place holder at 32. The top five assignees together account for 281 of the 624 records in scope, or 45.0% of the total, so the field has a clear leader plus a group of secondary players rather than an even spread. Anyone doing competitive tracking should watch that leader's portfolio closely, since it alone is comparable in size to several mid-tier competitors combined.
Filing volume rose from 30 records in 2021 to a peak of 41 in 2024, a 37% increase over that span. Data for 2025 and 2026 shows lower counts, but publication typically lags filing by roughly 18 months, so those recent years are still filling in rather than showing an actual decline. Based on the last complete year, 2024, the field was still expanding, not slowing.
The bulk of filings sit in IPC class G02F, optical control and modulation, which appears in 75.6% of the 624 records in scope, and G09G, display control circuitry, at 42.1%. Smaller but still active areas include G06F (electric digital data processing) and G02B (optical elements and systems), each near 9-10% of records. Ink and coating formulation (C09D) and mechanical actuation (B06B) are the thinnest represented classes, each under 5%.
The classes with the lowest share of the 624 records are the best starting point: B06B (mechanical vibration generation, relevant to particle-jostling actuation) at 2.1%, C09D (coatings, paints and inks) at 3.5%, and B41J (typewriters and printers, relevant to print-integrated e-paper output) at 4.5%. These sit far below the 75.6% carried by the dominant optical-control class, suggesting less-crowded claim space for new filings that combine those mechanisms with colour-switching performance. That said, thin coverage in a class does not guarantee an open path — a freedom-to-operate check against the top assignees is still needed before drafting.
Refresh time appears as a claim element tied to specific numeric thresholds in recent filings, such as a representative 2025 filing from TPK Touch Solutions describing a refresh time under 50 ms for a stylus-driven colour trace. Refresh time claims typically sit within the G02F and G09G classes, which together cover driving waveforms and display control circuitry. Because these classes carry 75.6% and 42.1% of the 624 records respectively, refresh-time claims sit in some of the most densely filed territory in the field, and new claims need to differentiate on the specific mechanism or threshold rather than the general concept.
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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.