Key Factors to Look for When Choosing E Ink Tablets - BOOX Shop

E Ink tablets have gained significant popularity in recent years, offering a comfortable reading experience and a range of features tailored for book ethusiasts and digital note-takers. E Ink displays offer several advantages over traditional LCD screens, such as reduced eye strain and excellent readability even in bright sunlight. With numerous options available on the market, it can be overwhelming to choose the right E Ink tablet that suits your needs. In this article, we will delve into the key factors that should be taken into consideration when selecting an E Ink tablet.

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1. Monochrome or Color ePaper Display

One of the primary factors to consider is whether you prefer a black & white or color screen. While black & white screens are commonly associated with E Ink technology, some E Ink tablets now offer color displays. Black & white screens are ideal for reading books and documents, as they enhance focus and mimic the ink on paper. On the other hand, color screens are suitable for those who require multimedia capabilities, such as viewing magazines, comics, or graphs. Consider your specific needs and preferences to determine which type of screen is best suited for you.

2. Screen Size

Another important consideration when choosing an E Ink tablet is the screen size. The size of the screen directly impacts the reading experience and portability of the device. The screen sizes can be categorized into three sizes: large (13.3'' or above), medium (typically around 10.3''), and small (pocket-friendly and for on-the-go).

The large E Ink screen provides an expansive viewing experience, ensuring clear text readability and offering ample space for writing. It's great for frequent PDF reading and coding. However, larger E Ink screens have higher manufacturing costs, resulting in limited availability on the market.

Medium screens strike a harmonious balance between price, portability, and screen size. They are versatile for reading e-books, taking notes, and browsing documents. They are the most popular choice among E Ink tablets. Professionals who frequently travel or commute will appreciate the compact size and lightweight nature of medium E Ink tablets, as they can easily slip into a bag without adding unnecessary bulk.

Smaller screens are highly portable and lightweight. If you want to carry it with you during your daily commute or while traveling, a small E Ink tablet provides convenience and portability. For example, BOOX Tab Mini C boasts a 7.8'' Kaleido 3 ePaper screen that is ideal for on-the-go inspiration and reading mangas.

Ultimately, finding the right balance between screen size and portability is based on your specific needs. Whether you need a larger screen for professional tasks, a medium-sized tablet for versatile use, or a small and portable device for on-the-go reading, there is an E Ink tablet available to suit your needs.

3. The Intended Purpose of Usage

When it comes to selecting the right E Ink tablet, the options can be overwhelming. The intended purpose of usage is also a crucial factor to take into consideration. These innovative ePaper tablets can be categorized into three main types: the eye-friendly eReader, the notebook replacement, and the productivity powerhouse.

Eye-friendly eReader

For avid book lovers seeking a distraction-free reading experience that minimizes eye strain, pocket-sized and lightweight eReaders such as the BOOX Poke 5, Page, or Palma (to strike a balance between tech and life) are ideal choices. These devices provide crisp texts and boast an open system that offers maximum flexibility, enabling you to enjoy your entire library wherever you want.

Notebook Replacement

If you're in search of a paper notebook or LCD notepad replacement that provides a more eye-friendly ePaper experience and concentration, there are E Ink tablets available with writing capabilities. The BOOX Note Air3 C, for example, offers hints of color, a pen-to-paper feel, and writing capability.

Productivity Powerhouse

For those looking to replace their laptops, E Ink tablets with advanced hardware, ultra-smooth performance, and powerful features are a must. The BOOX Tab Ultra C Pro (Color, 10.3'') and Tab X (B&W, 13.3'') are the ultimate laptop replacement, designed to enhance productivity and provide an exceptional user experience. If you desire a highly portable mini workstation, the Tab Mini C (7.8'') would be a better choice. With its compact size, you can effortlessly capture your thoughts on the move, and enjoy the ultra-smooth performance that the Tab Mini C offers.

4. Closed or Open System

The choice between a closed system and an open system can significantly impact the content resources available to you. A closed system typically restricts access to content that is exclusively tied to the provider, limiting the options for you. While an open system allows for greater flexibility and the ability to access content from various providers, expanding the possibilities for you.

It is a matter of personal preference and the desired level of flexibility and customization. Some prefer the intuitive experience of a closed system, while others value the customization options of an open system. If you want to access a wide range of apps to expand your reading possibilities, the BOOX devices running on the Android OS present an excellent choice.

Conclusion

This article is part of TechXchange: Advanced Display Technology

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E-paper displays have been around for some time now, made famous by ebook readers such as the Amazon Kindle, Barnes & Noble Nook, and the various Kobo models. E-paper displays are also increasingly appearing in other devices, including shop shelf tags, shipping labels, watches, signs and even smartphone cases.

But despite the fact that many people see or use these displays on a daily basis, lots of myths and misconceptions revolve around the technology. Here, we look at 11 of these to help you understand why e-paper is becoming such a popular choice for product designers who want to include displays, but have very limited power budgets.

1. An e-paper display only uses slightly less power than a same-size TFT LCD.

While this statement could be true in certain cases, if e-paper is used to its strengths—i.e., for displays that are updated relatively infrequently—it will use considerably less power than a same-sized TFT LCD. This is because it only consumes power when you change what’s on the display. Once an image is visible, e-paper requires no power to keep it there.

To understand just how big a difference we’re talking about, imagine a two-inch screen that needs to display information constantly, and update that information six times per day. A TFT LCD needs to refresh around 50 times per second (or 4,320,000 times per day) regardless of whether the image it’s displaying remains the same or is changing. At 30 mA × 0.02 seconds per refresh × 4,320,000 refreshes per day, this gives a daily power consumption of 2,592,000 mA, or 720 mAh.

By contrast, an e-paper display will use around 3 mA for 2 seconds each time it updates its contents, giving a total use of 36 mA or 0.012 mAh per day. Put another way, in this typical e-paper use case, the display consumes just 0.008% of the power that a same-sized TFT LCD would require in a day.

2. Even though e-paper uses relatively little power, devices with e-paper displays still typically require a battery change every 12 months.

If this were true, it would create a significant logistical headache for anyone operating large numbers of battery-powered e-paper kit, such as tags or labels. Happily, in most cases, an annual battery change is highly unlikely.

Granted, exactly how long the battery in a tag or label will last depends on a range of factors: type of battery used, how often the display is updated, how that information is sent to the tag or label, and what other components it contains.

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But to illustrate how small a proportion of power the e-paper display in such a tag or label would use, take the daily use figure from the above example. At 0.012 mAh per day, annual usage would be around 3.65 mAh. When you consider that a CR coin-cell battery, a popular choice for such applications, has a stated capacity of some 220 mAh, it’s clear the display isn’t going to make significant inroads into this in 12 months.

Even when you take the other components into account, as well as a small amount of leakage from the battery, most shelf labels on the market today are designed to last for up to five years without changing the battery.

3. When the battery runs out, you lose what’s shown on an e-paper display.

Unlike traditional TFT LCDs, which require a constant power source to display anything, once an e-paper display is showing an image, it will remain there and consume no power. In other words, even if you remove the power source, whatever is on the display will remain visible.

That’s because e-paper utilizes “bistable technology.” E-paper “pixels” are, in fact, tiny capsules that contain negatively charged black particles and positively charged white ones. By applying positive charge to the top of a capsule and negative to the bottom, you draw the black particles into view and pull the white ones out of sight, thereby creating the dark areas on your screen. Conversely, a negative charge to the top and positive on the bottom makes the white particles visible to the eye, producing a clear area. Crucially, once the particles are in position, they’ll remain there until an opposing charge is applied to move them.

4. Many existing barcode or QR-code scanners can’t read an e-paper display.

When you display a barcode on an LCD, not all scanners can read it. Ask anyone who’s tried to scan a voucher or loyalty card barcode displayed on their smartphone screen at a self-checkout system—it often doesn’t work.

As a result, there’s a misconception that barcodes or QR codes shown on e-paper displays will produce the same result. In fact, the way e-paper technology creates an image is fundamentally different from LCDs, meaning the majority of existing scanners can read barcodes and QR codes shown on an e-paper display.

E-paper displays create a visible image by reflecting ambient light off the white particles (and not reflecting it off the black ones), in exactly the same way that a printed barcode is visible to the eye or a scanner. LCDs, by contrast, aren’t reflective. They work by passing light through a layer of liquid crystal, so certain types of scanner may not be able to determine the difference between areas our eyes perceive as dark and light.

5. E-paper isn’t readable in sunlight.

LCDs become virtually unreadable in bright sunlight, because the backlight, designed to make the image in the liquid crystal visible, can’t compete with the brightness of the sun.

Conversely, e-paper displays remain perfectly usable in the sun because they’re reflective. The image on the display remains visible in sunlight exactly like printed ink on paper: The dark areas absorb the sunlight and the light areas reflect it, thereby creating a visible image.

This is one of the reasons why e-readers are so popular among sun-seeking holidaymakers.

6. You have to be directly in front of an e-paper display to be able to read it.

The reflective nature of e-paper means it actually offers viewing angles close to 180° in some cases. So even if you’re not able to get your eye directly in front of an e-paper display, you should still be able to read its contents.

7. E-paper will only work at room temperature.

Most e-paper panels are designed to be used between 0° and 50°C, meaning they’re not limited to “room temperature” use cases. Indeed, there are so-called wide-temperature panels, such as the A-MA product line, that can be used in temperatures as low as –25°C.

8. Updating one part of the e-paper display requires a refresh of the full display.

Traditionally, updating the image on an e-paper display required its entire contents to be refreshed. This is why you get the full-screen “blink” effect with many e-readers when you “turn the page” of your book.

However, new partial update technology, which can be used with existing e-paper displays, means it’s now possible to update parts of an e-paper display, while leaving the remainder of its contents unchanged. The technology offers a triple advantage: it takes only around a quarter of the time of a full refresh, consumes less power, and improves the user experience.

9. E-paper displays are all black and white.

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