Electrophoretic Display Driver Patents: Top Companies & Trends 2026
A data-backed look at electrophoretic display driver circuit patents: filing trends, the leading assignees, technology composition and where the white space sits, ahead of 2026.
Filing growth = 2021 (3 records) → 2024 (14); 2024 is the last year we treat as complete. Top-5 share = the 5 largest assignees ÷ all 257 records in scope (CR5), not the ranked leaders only.
What the electrophoretic display driver circuit patent record shows
Electrophoretic display driver circuits sit at the intersection of display control electronics and the electro-optic material stack that makes e-paper possible. The 257 records in scope span 2015 through the 2026 cut-off and cover the circuitry that addresses, refreshes and manages grey-level transitions on electrophoretic panels — not the pigment or microcapsule chemistry itself. Filing is concentrated among a small group of long-tenured display makers and materials licensors, with a long tail of single- or few-filing entrants below them. Publication lags filing by roughly 18 months, so the most recent years in any trend understate real filing activity.
Receiving-office data shows the United States as the busiest jurisdiction, followed by WIPO PCT filings and Europe, with South Korea, China and Japan close behind — a spread consistent with a technology that ships inside consumer electronics, e-readers and signage sold globally rather than in one regional market.
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Filing trend and technology composition
Two views of the same 257-record dataset: how filing activity has moved year over year, and which IPC subclasses the underlying circuitry actually falls into.
Filing trend: a steep climb into 2024
Annual filings rose from 3 records in 2017 to a peak of 14 in 2024, including a +367% jump from 2021 (3 records) to 2024. 2025 and 2026 both show fewer published records, but that reflects publication lag rather than a slowdown — treat the 2024 peak as the last complete year in the series.
Publication lags filing by roughly 18 months, so 2025 onwards are still filling in. Growth rates on this page therefore end at 2024; running them to the last bar would understate the field.
Technology composition: display control dominates
G09G display control circuits appear in 77.0% of the 257 records and G02F optical control/modulation in 63.8%, confirming that most of the claimed value sits in addressing and modulation logic rather than in adjacent digital-processing (G06F, 6.6%), signage (G09F, 6.6%) or optics (G02B, 2.3%) classes. Because records can carry more than one IPC class, these shares sum to well over 100%.
Shares are the percentage of the 257 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Electrophoretic Display Driver Circuit Patent Landscape with Eureka
This page is one run against one query. Ask Eureka your own question about electrophoretic display driver circuit patent landscape and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited and most representative filings
US20110128266A1 — Multiplex electrophoretic display driver circuit
A multiplex electrophoretic display driver circuit built from a memory unit, a display controller and a voltage driving unit. Two registers hold the current and former gray-level matrix signals; an encoding circuit computes the difference between them and derives a voltage-difference matrix signal that drives the electrophoretic pixels according to that difference rather than redrawing the full frame.Filed by Yuanhan Materials Inc., published 2011-06-02 — chosen here as representative of how driver circuits reduce redraw overhead by tracking gray-level deltas rather than full-frame states.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US6545291B1 | Transistor design for use in the construction of an electronically driven display | 825 |
| 2 | US6750473B2 | Transistor design for use in the construction of an electronically driven display | 554 |
| 3 | US6967640B2 | Microencapsulated electrophoretic display with integrated driver | 430 |
| 4 | US20030020844A1 | Microencapsulated electrophoretic display with integrated driver | 347 |
| 5 | US20070176912A1 | Portable memory devices with polymeric displays | 287 |
| 6 | US7382363B2 | Microencapsulated electrophoretic display with integrated driver | 285 |
| 7 | US8928641B2 | Multiplex electrophoretic display driver circuit | 255 |
| 8 | US20020005832A1 | Method and circuit for driving electrophoretic display, electrophoretic display and electronic device using s… | 235 |
| 9 | US8576259B2 | Partial update driving methods for electrophoretic displays | 165 |
| 10 | US20020021483A1 | Method and circuit for driving electrophoretic display and electronic device using same | 141 |
Citation counts favour older documents that have had more time to accumulate citations inside the searched corpus — read them as a signal of influence on the field, not of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the data means for filing strategy
Four findings that matter more to a filing or freedom-to-operate decision than the raw counts alone.
The top of the field is crowded, the middle is not
The leading assignee alone holds 51 records, and the top five together account for 58.4% of all 257 records in scope. Below that handful, the ranking thins out quickly across 81 companies — most holding only one or two filings. New entrants competing on core addressing logic are competing directly against the leaders' dense filing history.
Filing activity accelerated sharply into 2024
Annual filings grew from 3 records in 2021 to 14 in 2024, a +367% rise over three years and the steepest sustained run in the series. That growth predates the publication-lag window, so it reflects real filing behaviour rather than an artefact of recent data still filling in.
Display control circuitry is where the claims sit
G09G display control circuits appear in 77.0% of records and G02F optical control in 63.8%, together dwarfing digital processing, signage and optics classes that each sit under 7%. Claim space in core addressing and modulation logic is dense; classes like G02B and G04G are comparatively open.
A small cluster files jointly, most others do not
Only 10 co-assignee pairs appear in the dataset, with the strongest pairings linking a materials licensor to individual named inventors at counts of 16 and 13. Outside that cluster, most records list a single assignee, suggesting cross-licensing or joint development is the exception rather than the norm in this field.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to electrophoretic display driver circuit patent landscape, with the prior art for and against each one.
Where to take this analysis
The figures above establish the shape of the field. Turning that into a filing or freedom-to-operate decision means going deeper into specific claims and specific gaps.
Map claim overlap against the leading assignees
Run a claim-by-claim comparison against the highest-volume filers before drafting in display control or optical modulation circuitry, where filing density is highest.
Explore assignee filings in EurekaTest white-space branches before committing R&D
Classes like G02B optics and G04G clock/watch integration show far lower filing density — worth checking whether that reflects real technical difficulty or simply unclaimed ground.
Run a white-space search in EurekaTrack the 2024 peak forward
Publication lag means 2025-2026 filings are still arriving; set up monitoring now so the next wave of driver-circuit filings doesn't surface after a filing decision is already locked in.
Set up monitoring in EurekaCommon questions about electrophoretic display driver circuit patents
The assignee ranking covers 81 companies and individual filers across 257 records, and it is heavily front-loaded: the leading assignee alone holds 51 records, and the top five together hold 58.4% of all records in scope. That leaves a long tail of filers with just one or two records each. Anyone entering this space should expect to compete for core addressing-circuit claim space directly against that top handful rather than against the field as a whole.
Filings grew sharply between 2021 and 2024, rising from 3 records to 14 records, a +367% increase over that span and the peak year so far. Counts for 2025 and 2026 appear lower in the raw data, but that is expected: publication typically lags actual filing by roughly 18 months, so the most recent one to two years always look artificially quiet. Treat 2024 as the last year with a reasonably complete picture, not evidence of a slowdown.
The overwhelming majority of records sit in G09G (display control circuits, 77.0% of 257 records) and G02F (optical control and modulation, 63.8%), meaning most claimed value is in how a driver addresses and refreshes electrophoretic pixels rather than in the display's optical stack or digital processing layer. Smaller shares touch digital data processing (G06F), signage applications (G09F), semiconductor devices (H01L) and printed circuit assembly (H05K), each under 7% of records. Because a single record can carry several IPC codes, these percentages add up to more than 100%.
US20110128266A1 describes a multiplex electrophoretic display driver circuit that stores current and former gray-level matrix signals in two registers, computes a difference-value matrix signal between them, and drives pixels based on that voltage difference rather than redrawing every pixel each frame. Filed by Yuanhan Materials Inc. and published in 2011, it is representative of a delta-based addressing approach common across the dataset. Whether it blocks a specific new design depends on whether that design also stores and differences prior gray-level state to derive its drive voltage — a full claim chart against the specific implementation is the only reliable way to check.
The technology composition data points to optics (G02B, 2.3% of 257 records) and clock/watch integration (G04G, 1.6%) as the thinnest-claimed classes relative to the dominant display-control and optical-modulation categories. That does not guarantee those branches are technically easy, only that fewer parties have filed there so far. A freedom-to-operate search focused on those specific subclasses, rather than the crowded G09G/G02F core, is the more efficient way to find open claim space.
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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.