Reflective Display Front Planes Patents: Leaders & Trends 2026
- Concentrated but not locked up. the five leading assignees together hold 26.3% of all 1,119 records in scope, and the leading ten hold 36.6% — real concentration, but well short of a closed field.
- Filing has cooled from its peak. 2017 was the high-water mark at 53 records; complete-year data shows a 53% drop in filing volume from 2021 (36) to 2024 (17).
- Optical control dominates the claim map. G02F (optical control & modulation) touches 71.6% of the 1,119 records, far ahead of G02B optics (28.3%) and display driving circuitry (17.5%).
Filing growth compares 2021 (36 records) with 2024 (17) — 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 1,119 records in scope (CR5), not by the ranked leaders only.
What this landscape covers
Reflective display front planes sit at the intersection of optics and low-power electronics: the light-guide, diffusion and pixel-front layers that let a display be read in ambient light without a backlight. This landscape draws on 1,119 published records filed between 2015 and mid-2026, spanning claims on ambient contrast, light-guide uniformity, bistability, power consumption and haze control. Publication lags filing by roughly 18 months, so the most recent one to two years in any trend understate actual filing activity.
The dataset is built from title, abstract and claim-language searches rather than a single classification code, so it captures front-plane innovation wherever it is claimed — in electrophoretic and electrowetting display patents, in front-light module patents, and in general optical-film patents that happen to specify a reflective display application.
Filing trends and technology composition
Two views of the same 1,119-record dataset: how filing volume has moved year over year, and which IPC subclasses the claims actually sit in.
Filing rose to a 2017 peak, then eased
Filing volume peaked in 2017 at 53 records for a single year. Using only complete-year data, volume fell from 36 records in 2021 to 17 in 2024, a 53% decline over that span. Because publication trails filing by around 18 months, the low counts in 2025 and 2026 reflect reporting lag as much as any change in real filing behaviour, and should not be read as a continuing slide.
Optical control claims dominate; circuitry and semiconductor classes trail
G02F (optical control & modulation) appears in 71.6% of the 1,119 records, making it the default classification for front-plane work. G02B optical elements (28.3%) and G09G display control circuits (17.5%) are the next most common, with lighting components (F21V, 8.4%), semiconductor devices (H01L, 8.1%) and OLED-adjacent H10K (5.7%) forming a smaller but still active tail. Because records often carry more than one class, these shares sum to well over 100%.
Shares are the percentage of the 1,119 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Reflective Display Front Planes with Eureka
This page is one run against one query. Ask Eureka your own question about reflective display front planes and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this field
US10185063B2 — Optical-diffusion film for display and reflective display device using same
Provided are an optical-diffusion film for display which, particularly when applied to a reflective display device, can efficiently diffuse and emit an external light incident from a wide range of angles toward the front of the display device as image display light, and a reflective display device using the optical-diffusion film. Disclosed is a single-layered optical-diffusion film obtained by photocuring a composition including two or more polymerizable compounds of different refractive indices, with film thickness in the 60 to 700 μm range.Filed by Lintec Corporation, published 2019-01-22.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US7075502B1 | Full color reflective display with multichromatic sub-pixels | 1,310 |
| 2 | US20120075168A1 | Eyepiece with uniformly illuminated reflective display | 1,184 |
| 3 | US6864875B2 | Full color reflective display with multichromatic sub-pixels | 928 |
| 4 | US6865010B2 | Electrophoretic electronic displays with low-index films | 558 |
| 5 | US20020113770A1 | Methods for achieving improved color in microencapsulated electrophoretic devices | 464 |
| 6 | US20080048970A1 | Full color reflective display with multichromatic sub-pixels | 367 |
| 7 | WO1999053373A1 | Full color reflective display with multichromatic sub-pixels | 363 |
| 8 | US6215920B1 | Electrophoretic, high index and phase transition control of total internal reflection in high efficiency vari… | 342 |
| 9 | US20040263947A1 | Full color reflective display with multichromatic sub-pixels | 326 |
| 10 | US20020180688A1 | Full color reflective display with multichromatic sub-pixels | 326 |
Citation counts reward older filings that have had more time to accumulate references; treat them as a signal of influence within this corpus, not as an indicator of current commercial relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once the ranking, the trend and the IPC mix are read together.
Leadership is real but not exclusive
The leading assignee holds 84 records outright, and the top five together account for 26.3% of the 1,119 records in scope. The tenth-ranked assignee holds only 20, so the ranking flattens quickly after the leaders — this is a field with a visible core and a long tail rather than a duopoly.
Filing has genuinely eased, not just lagged
The drop from 36 records in 2021 to 17 in 2024 uses only complete years, so it is not an artefact of publication lag. Recent-year filing counts for several of the largest historical assignees have fallen to zero or one, suggesting the current wave of front-plane innovation is coming from elsewhere in the ranking.
One optical subclass carries most of the field
G02F covers the great majority of records, meaning most enforceable claim scope sits in optical control and modulation mechanisms rather than in circuitry or materials science framing. Filers working in G09G display control or H10K OLED-adjacent framing face comparatively thinner prior art.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to reflective display front planes, with the prior art for and against each one.
Who is filing, and where the activity is now
The ranking spans 100 assignees counted by record; a handful of large historical filers coexist with a long tail of single- or few-filing entrants.
One filer well ahead of the field
The top-ranked assignee holds 84 records, more than double the fifth-place count of 38, giving the field a clear historical leader even as recent-year filing from that same group has slowed to near zero.
A fast taper below the leader
Counts fall from 84 at first place to 38 at fifth and 20 at tenth, meaning the top ten collectively hold 36.6% of all 1,119 records while individual mid-field positions are held by a much smaller and more contestable body of filings.
Historical leaders have gone quiet
Several of the largest historical assignees show zero filings in the latest year, with the single most active of them recording just one. That does not mean the technology is exhausted — it means current activity, when it resumes in the data after publication lag catches up, may come from different entrants than the historical leaders.
| Assignee | Recent year | YoY |
|---|---|---|
| E Ink Corporation | 1 | — |
| Seiko Epson Corporation | 0 | — |
| Semiconductor Energy Laboratory Co., Ltd. | 0 | — |
| Sharp Corporation | 0 | — |
| Toppan Holdings Inc. | 0 | — |
| BOE Technology Group Co., Ltd. | 0 | — |
| Sony Group Corporation | 0 | — |
| Koninklijke Philips N.V. (Royal Philips) | 0 | — |
Where to take this analysis
The dataset points to next steps for both freedom-to-operate and whitespace scouting.
Check the under-claimed branches against your own claims
The gate chips above flag sub-areas with comparatively thin coverage relative to G02F's 71.6% share. A first claim drafted around light-guide uniformity or low-temperature bistability has more room than one filed squarely in general optical control.
Explore white space in EurekaWatch for new entrants replacing the historical leaders
With several top-ranked assignees showing zero or near-zero recent-year filings, the next wave of enforceable claims may come from outside the current top ten. Tracking assignee-level momentum quarter over quarter is more useful here than relying on the historical ranking alone.
Track assignee momentum in EurekaCommon questions about this landscape
The leading assignee in this dataset holds 84 of the 1,119 records in scope, well ahead of the fifth-ranked assignee at 38 and the tenth-ranked at 20. The top five assignees combined account for 26.3% of all records, and the top ten account for 36.6%. That is meaningful concentration at the top, but the ranking includes 100 companies, so the majority of filings sit outside the leadership group in a long tail of smaller filers.
Filing peaked in 2017 at 53 records in a single year and has eased since. Using only complete-year data, filing fell from 36 records in 2021 to 17 in 2024, a 53% decline over that span. Publication lags filing by roughly 18 months, so 2025 and 2026 figures in the raw trend are still filling in and should not be read as a continuation of the decline; the 2021-2024 comparison is the reliable signal.
US10185063B2, assigned to Lintec Corporation and published in January 2019, claims a single-layered optical-diffusion film made by photocuring a composition of two or more polymerizable compounds with different refractive indices, with film thickness specified in the 60 to 700 micrometre range, applied to a reflective display device. It is a materials and film-structure claim rather than a circuit or pixel-architecture claim, so it primarily constrains diffusion-film formulation and thickness choices for anyone building a front-light or ambient-light diffusion layer in that thickness band.
G02F, optical control and modulation, appears in 71.6% of the 1,119 records and is the default classification for front-plane work, meaning claim space there is the most occupied. G02B optical elements (28.3%) and G09G display control circuitry (17.5%) follow at meaningfully lower density. Because a single record can carry multiple IPC classes, these percentages sum to more than 100%, and dense coverage in G02F signals occupied claim space rather than technological maturity on its own.
Composition data points to comparatively thinner coverage in areas like front-light guide uniformity at wide viewing angles, bistable pixel retention at low temperature, and haze-controlled diffusion films under typical thickness bands, relative to the dense general optical-control claim space. OLED-adjacent hybrid stacking and ultra-low-power display-control circuitry also show lower record counts than the core optics classes. These are starting points for a freedom-to-operate search, not a guarantee of an open field, since absence from this keyword-based dataset does not rule out coverage under different claim language.
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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.