When Paper Starts to Move: Bigme’s 25.3-Inch Color E-Paper and the Meaning of 60 FPS

A mouse pointer crosses a white screen. On an LCD, the event is unremarkable. On electronic paper, it is a tiny physical drama. Inside vessels roughly the width of a human hair, charged white and black pigments swim through clear fluid, rising toward the viewer or sinking away when voltage gives the command. Particles left in an earlier position become a ghost; arranging them completely takes time. To make a cursor glide, a controller must conduct that drama continuously across millions of pixels.

Bigme, an electronic-paper device brand based in Shenzhen, China, says its new B251 Pro can conduct it at up to 60 frames per second. The monitor has a 25.3-inch, 3,200-by-1,800, 16:9 display rated at 145 dots per inch, with 4,096 colors and 16 gray levels. Bigme says it raises the maximum frame rate from 21 FPS on the earlier B251 to 60 FPS, smoothing page scrolling, typing, window movement and light video. The Japanese announcement appeared early on July 24, and the product is on sale through Bigme’s official store.

It is a product that seems to run the history of electronic paper backward. For half a century, researchers prized the ability not to move. Paper is not redrawn while it is read. Electronic ink can likewise retain an image, avoiding continuous emission and eliminating the need to keep driving unchanged pixels. The B251 Pro tries to preserve that virtue of stillness while catching up with the continuous motion demanded by a modern computer.

But the most important qualification must come first. Sixty FPS is a manufacturer’s “up to” figure. In the public material Japan.co.jp could find by July 24, no independent laboratory had published full-screen pixel-response, input-latency, color-accuracy, ghosting and power measurements for the B251 Pro. Accepting 60 signals, processing 60 frames and physically moving pigment far enough to create 60 clean images are not identical achievements. The claim may prove consequential. It is not yet verified parity with an ordinary 60 Hz LCD.

What the monitor promises—and what remains unanswered

Bigme emphasizes not speed alone but a design that trades speed and quality according to the task. There are four refresh modes: text, web, image and video. Text favors sharp character edges; web favors scrolling; image gives priority to color and gradation; video favors continuity. The monitor also offers monochrome display, text enhancement and color controls. In effect, the modes acknowledge that not every property can be maximized at once.

Ghosting control is called xClear. Bigme says it adapts to screen changes and usage scenarios to reduce the accumulation of afterimages. In an electrophoretic display, a sequence of voltages—the driving waveform—determines how quickly pigments move, how many gray levels survive, how much flashing is visible and what trace of the old image remains. Even a transition to the same shade of gray may need a different path depending on whether that pixel was previously white or black. A fast waveform can omit cleanup steps; a thorough reset can create a conspicuous black-white flash. The value of xClear lies in deciding when, where and how completely to clean.

The monitor accepts wired video over HDMI and DisplayPort and advertises DLNA, AirPlay and Miracast wireless mirroring. It has a front light with 30 levels of color-temperature adjustment, stereo speakers, a remote control and landscape/portrait rotation. USB-C requires care: Bigme’s own specification says the port is for “system upgrade only.” It does not promise USB-C video or a one-cable powered laptop setup.

The official store showed US$1,349 on July 24, discounted from $1,599. At the edition’s stated exchange rate of ¥163.85 to the dollar, the observed price converts to roughly ¥221,000 before taxes and shipping. Buyers in Japan should confirm import costs, return shipping, domestic support and dead-pixel terms rather than treating that conversion as a delivered price.

Published item	B251 Pro	How to read it
Frame rate	Up to 60 FPS	A manufacturer claim. Public benchmarking must establish the modes, color depth and screen area in which it is reached
Display	25.3 inches, 3,200 × 1,800, 145 dpi	Ample space for documents; color-filter e-paper has separate constraints on colored detail and brightness
Color	4,096 colors, 16 gray levels	Useful for charts, syntax and maps; inadequate for photo grading, video finishing or exact brand color
Light	30-level warm/cool front light	Ambient reflection by day, light across the surface in darkness. It is not always a light-free experience
Connections	HDMI, DisplayPort, wireless mirroring	The official listing reserves USB-C for system updates; it should not be assumed to carry video
Warranty	One year through the official store	Confirm Japan service, shipping, pixel-defect policy and return destination before purchase

Frame rate, refresh rate and response time are three clocks

Sixty hertz is familiar in the conventional monitor market. A panel operating on 60 cycles each second receives a new opportunity to display an image every 16.7 milliseconds. Yet visible smoothness depends on at least three clocks: the cadence at which frames arrive, the time a pixel needs to finish changing brightness or color, and the total delay between an input and the visible result. LCDs also require those distinctions. They can diverge more dramatically when physical pigment must travel through fluid.

If a pixel receives a new command every 16.7 milliseconds but has not completed the last transition, the viewer is not seeing 60 fully formed pictures. Edges may trail, intermediate grays may collapse, colors may weaken and a pointer may acquire a shadow. Alternatively, a display can keep stopped text extremely sharp, temporarily lower quality during a scroll, then repaint in high quality the instant movement ends. For much office work, that behavior can be entirely sufficient.

The B251 Pro should therefore not be judged by the numbers race of gaming monitors. Scroll through hundreds of lines of code, stop and read. Turn a long PDF page, enlarge a chart and annotate it. Type a paragraph and move to the source beside it. Watch a market table update. These tasks move, stop and invite reading. If the jump from 21 to 60 FPS makes their motion feel immediate while keeping stopped content clean, it matters. Competitive games, sports video, color correction and animation finishing demand evidence that the “60” alone cannot supply.

From rotating spheres to swimming pigment

The ancestry of electronic paper reaches back to the 1970s, when computer terminals still glowed with green text. Nicholas Sheridon at Xerox PARC devised Gyricon, a sheet containing tiny spheres that were white on one hemisphere and black on the other, each free to rotate inside an oil-filled cavity. An electric field turned white or black toward the viewer. The balls retained their orientation after the field was removed, creating bistability and a viewing angle close to paper. A 1999 technical paper reported diffuse reflectance above 18 percent and contrast above 6:1.

Making billions of uniform bichromal spheres and packing them densely over a wide area proved difficult. The next decisive step substituted swimming for rotation. Researchers including Barrett Comiskey and Joseph Jacobson, working out of the MIT Media Lab and the company E Ink, published “an electrophoretic ink for all-printed reflective electronic displays” in Nature in 1998. An electric field moved scattering or absorbing particles 0.1 to 5 micrometers wide. Encapsulating the dispersion addressed lifetime and manufacturing problems and opened a path to printing a bistable display.

In a familiar two-particle E Ink film, millions of microcapsules hold oppositely charged white and black pigments suspended in clear fluid. The direction of an applied field brings one kind to the viewing surface. The display emits no image-forming light of its own, reflecting illumination from the room like paper. The particles retain position when driving stops. That is why an e-reader can have exceptional battery life and an electronic shelf label can display the same price for months.

Japan turns a material into a product: the 2004 LIBRIé

Japan became a crucial stage in moving the research material into consumers’ hands. Sony worked with Philips, E Ink and Toppan Printing on the LIBRIé e-book reader, launched in Japan in April 2004. E Ink made the microcapsules; Toppan formed them into front-plane film; Philips built the cell and display module; Sony supplied system control and finished the product. The roughly six-inch display offered about 170 pixels per inch and a nearly 180-degree viewing angle. Sony said four AAA alkaline batteries could support about 10,000 page changes, challenging the assumption that every screen must consume power continuously.

LIBRIé did not conquer the e-book market. Rights management, distribution, ecosystem, price and the communications environment helped determine its fate. But it proved the technology was real. In November 2007, Amazon introduced the first Kindle in the United States for $399, joining an electronic-paper screen to cellular delivery and a store of more than 90,000 titles. E-paper’s breakthrough was not merely that it resembled paper. It arrived when retail, networking, battery life and hardware became one experience.

The lesson bears directly on the B251 Pro. A fast panel alone does not become a primary monitor. Operating-system text rendering, scaling, window animation, connection reliability, mode switching, warranty and price all shape the experience. As the three years between LIBRIé and Kindle illustrated, an excellent display material and a product people want to use continuously are separate inventions.

Two roads to color: filters or colored particles

Adding color to black-and-white electronic ink tightens a triangle of speed, brightness and resolution. One approach lays an RGB color-filter array over a relatively fast monochrome ink layer. E Ink’s Triton advertised 4,096 colors in 2010; later Kaleido generations improved the printed filter and module structure. E Ink says Kaleido 3 displays 4,096 colors, reaches 300 ppi in monochrome and 150 ppi in color in common reader modules, and improves saturation by 30 percent over Kaleido Plus. Chinese launch coverage identified the B251 Pro’s 25.3-inch panel as Kaleido 3, although Bigme’s Japanese release simply says color E Ink.

The filter selects red, green and blue components from a monochrome image. It preserves the fast underlying two-particle ink, but the filter absorbs some reflected light. Color is more muted and the surface often appears darker than an LCD or OLED. A front light can compensate in dim rooms and increase perceived saturation, but it consumes power and reduces the purity of an ambient-only reflective experience. A 4,096-color palette can separate map regions, chart series, annotations, comics and syntax. It is not a substitute for the roughly 16.7 million colors of a typical 24-bit monitor when judging photographs or finished video.

The second road places several colored pigments inside each pixel. E Ink’s Advanced Color ePaper, announced in 2016, and its Gallery 3 descendant use cyan, magenta, yellow and white particles to form a wider gamut at each pixel without a filter. Richer color carries a time cost because the desired particles must be sorted to the surface. At its 2022 launch, Gallery 3 updated black and white in 350 milliseconds, fast color in 500 milliseconds, standard color in 750 to 1,000 milliseconds, and best-quality color in 1.5 seconds. Those figures reveal how difficult it is to obtain high-quality color and video speed together.

A 25.3-inch signage module shows a third optimization. Litemax lists a Spectra 6 product at the same 3,200-by-1,800 resolution with more than 30,000 colors—and a 30-second update time. That is sensible when a poster changes only several times a day and consumes very little power while holding the image. The B251 Pro leans in the other direction: fewer colors, aggressive driving and ghost management in pursuit of desk interaction. Neither is universally better. Each synchronizes electronic paper to a different clock.

Medium	Light and still images	Motion and color	Best fit
Paper	Reflects ambient light; needs no power	Fixed; print can reproduce rich color	Long reading, preservation, distribution
LCD / OLED	Continuously driven; emissive or backlit	Fast, wide-gamut, low-latency	Video, gaming, creative work, general computing
Fast Kaleido-class e-paper	Reflective and bistable; optional front light	Muted color; speed trades against ghosting and tone	Writing, code, spreadsheets, research, charts
Gallery / Spectra multi-pigment e-paper	Reflective and strong at holding static images	Richer color, much slower updates	Posters, signs and electronic shelf labels

The large e-paper monitor did not appear overnight

The B251 Pro is not the first 25.3-inch color e-paper monitor. DASUNG announced a display of the same size in 2023 with Kaleido 3, 3,200-by-1,800 resolution and 4,096 colors. Its DASUNG253C REVO reached Japan in 2025 at about ¥298,000, marketed for very fast refreshing. BOOX and other manufacturers entered large e-paper, while Bigme’s own B251 was rated up to 21 FPS. By 2026 the contest had shifted from whether e-paper could show video at all to whether an ordinary desktop could feel natural.

Research into driving waveforms shows why the advance is not a simple matter of installing a faster processor. Pigments may need to be activated, the old state erased, the new gray approached, and accumulated charge balanced. Shortening those stages can improve speed while worsening ghosting, flashing, gray uniformity or long-term material behavior. A 2014 study added voltage levels and reported an experimental average response of 61 milliseconds with greatly expanded gray representation. A 2020 study optimized the activation phase, removing 300 milliseconds from a conventional waveform while cutting visible ghosting by 57 percent. Those are not measurements of the B251 Pro. They demonstrate that speed emerges from an alliance of software and materials physics.

Other reflective technologies have pursued motion by different means. In 2003, Philips Research scientists showed a video-speed electrowetting display in Nature, using voltage to move a colored oil film rather than electrophoretic particles. In 2025, another Nature paper demonstrated full-color reflective images above 25 Hz with nanoscale tungsten-oxide structures. “Electronic paper” is a goal, not a single mechanism: Gyricon spheres, E Ink pigments, oil films and structural color have all tried to join paper’s reflectivity with a screen’s changeability. Because electrophoresis won the commercial e-reader market, the attempt to bring its slow particles to 60 FPS is especially symbolic.

Do not turn “easy on the eyes” into a medical guarantee

Bigme cites paper-like display, low blue light and low reflectivity as advantages for extended work. There is a genuine physical difference in viewing a reflective surface under suitable room light instead of looking toward a backlight. Matte electronic paper can reduce strong reflections, and large white documents can remain visible without a luminous white field. It is understandable that some people who are sensitive to light prefer it.

That does not justify a promise that e-paper prevents eyestrain. A 2012 experiment in which participants read for hours found that the E Ink and LCD devices tested were similar on subjective and objective strain measures; the authors concluded that image quality, not the technology label itself, was crucial. A separate 2013 study found greater visual fatigue on a particular Kindle Fire HD LCD than on a Kindle Paperwhite and paper. The results differ because brightness, contrast, type size, ambient light, reflection, tasks and devices differ.

The B251 Pro also contains a front light. When it is used in a dark room, light reaches the eye. Ghosting in fast mode, degraded edges and intermittent full-screen clearing may themselves be difficult for some viewers. Appropriate room illumination, readable text size, viewing distance, breaks, blinking and corrected vision remain important with every display. Anyone buying because of persistent pain or visual symptoms should test their own work under a returnable arrangement and consult an eye-care professional rather than treating a monitor as medical therapy.

Low power means something different at rest and at 60 FPS

Bistability means unchanged electronic-ink pixels need not be continuously driven. A monitor, however, is not a frozen e-book page. Full-screen updates at 60 FPS keep the thin-film transistor backplane, timing controller, video processing, wireless system, speakers and pigment drive active. A front light adds its own load. E Ink itself notes that constant fast updating reduces the power efficiency of its ink systems.

Bigme’s public announcement and product page do not specify measured watts for a still image, document scrolling, maximum frame rate, or each front-light level. It would therefore be premature to declare that the B251 Pro necessarily uses less energy than a comparable LCD. A fair test must use the same screen size, room lighting, work duration, sleep behavior and external illumination. Materials, manufacturing yield, transport, repairability, lifetime and disposal further complicate the environmental account.

Still-heavy document work nonetheless offers a distinctive opportunity. Update only changed regions, stop while the user reads, and use room light. If 60 FPS is an upper limit available during interaction rather than a duty imposed all day, its value grows. The most characteristically “electronic paper” future may not redraw 60 frames forever. It may move quickly only when needed, then become almost idle when thought catches up.

Who is this monitor for?

The clearest candidates do work dominated by text and intermittent motion: writers, editors, translators, lawyers, researchers, programmers, analysts and students. They read black text for long stretches and use color to distinguish syntax, comments, headings and chart series. A 25.3-inch surface can place a paper beside annotations, code beside documentation, or a draft beside sources. Portrait rotation suits long pages and source files.

It is a poor natural fit for video finishing, photography, print proofing, 3D production and reaction-time-sensitive games. A 4,096-color palette, unreported color accuracy, ghosting and response delay conflict with those standards. It can display presentations or shop information, but a richer, slower signage panel may be more rational for a fixed poster. For video playing all day, an LCD or OLED remains cheaper, brighter and more predictable.

Price further narrows the market. At $1,349, a buyer can purchase more than one excellent conventional 27-inch 4K display. This is not a product for someone seeking the greatest speed and color range per dollar. It is specialist equipment for a person with a specific reason: avoiding a luminous primary screen, gaining a large surface for text, or escaping the sluggishness of an earlier e-paper monitor.

Break the number 60 apart before buying

Products in a new category should be tested against a workflow, not a specification card. Promotional videos can change the apparent ghosting and flicker through camera shutter, capture frame rate and editing. A prospective owner should use the same laptop, operating system, applications, fonts and room lighting that will define the real desk.

A rigorous review should disclose camera shutter speed, place the same input beside an LCD, and measure pointer delay with high-speed video. It should measure stopped-image color, record ghosting after sustained scrolling, count full clears and separate static power from video power. Only when we know the image quality at which 60 FPS operates will we know the size of the advance.

The point is not moving paper, but a quieter work screen

The B251 Pro’s bold idea is not that we should watch cinema on electronic ink. It is that most work does not move like cinema. We may stare at a screen all day, but much of that day consists of motionless words. What we need is a stopped image worth reading and enough speed that each input does not interrupt thought.

Gyricon dreamed in the 1970s of paper that could retain an image without power. Microcapsules turned that dream into a printable material in 1998. LIBRIé made it a Japanese consumer product in 2004; Kindle joined it to distribution in 2007. Color e-paper divided into filtered and multi-pigment paths, while large monitors changed the problem from turning a page to following a cursor. The B251 Pro belongs on that long line. It has probably not broken the laws of physics. It has pushed control, waveform, processing and image-quality compromise to a new point.

The verdict will be delivered in quiet moments, not by the number 60. When scrolling stops, does type become clear immediately? Does the pointer lose its shadow? Is the red annotation legible? Can someone work until evening without turning the front light high? If the page simply exists like paper and changes quickly only when asked, e-paper will have moved a step from the edge of the e-reader market toward the center of work.

If speed leaves the image perpetually dirty, periodic inversions steal attention and color misleads judgment, 60 FPS will remain a victory on a specification sheet. Electronic paper’s half-century lesson is that a screen’s value is not only how often it changes. It is how beautifully and quietly it holds the time between changes. The B251 Pro will be tested on whether it can offer both at the same desk.

Sources and references

This report cross-checked Bigme’s announcement and product specifications with primary materials from E Ink and Sony, foundational electronic-paper papers, peer-reviewed visual-fatigue research and specialist reporting. Claims about 60 FPS, xClear and user experience are attributed to the manufacturer; we do not infer unpublished independent measurements. Price was observed July 24, 2026.

• Bigme: Japanese announcement of the 25.3-inch B251 Pro (July 24, 2026)
• Bigme official store: B251 Pro specifications, price and warranty
• Sina Technology / ITHome: China launch, Kaleido 3 panel and RMB 10,999 price (July 10, 2026)
• Tom’s Hardware: The 60 FPS claim and unresolved response and ghosting questions (2026)
• Igor’sLAB: B251 Pro speed and image-quality trade-offs (2026)
• E Ink: How electronic ink, particle movement and update modes work
• E Ink: Kaleido 3, 4,096 colors and 300 ppi monochrome / 150 ppi color
• E Ink: Gallery 3 four-particle system and update times (2022)
• Comiskey et al.: “An electrophoretic ink for all-printed reflective electronic displays” (Nature, 1998)
• Sheridon et al.: “The Gyricon rotating ball display” (JSID, 1999)
• Sony: E Ink display for the LIBRIé e-book reader (2004)
• Amazon: Introduction of the first Kindle (November 19, 2007)
• Wired: E Ink Triton’s color-filter approach (2010)
• Hayes & Feenstra: “Video-speed electronic paper based on electrowetting” (Nature, 2003)
• Santosa et al.: “Video-rate tunable colour electronic paper with human resolution” (Nature, 2025)
• PC Watch: DASUNG’s first 25.3-inch color E Ink monitor (2023)
• SKT: Japanese launch of the DASUNG253C REVO (2025)
• Litemax: Specifications for a 25.3-inch Spectra 6 signage panel
• Kim et al.: “Multilevel driving waveform for electrophoretic displays” (Electronics Letters, 2014)
• Yi et al.: Driving waveforms for faster response and reduced ghosting (Micromachines, 2020)
• Siegenthaler et al.: LCD versus E Ink fatigue and visual strain (2012)
• Benedetto et al.: “E-Readers and Visual Fatigue” (PLOS ONE, 2013)