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Earlier this week, supply-chain analyst extraordinaire Ming-Chi Kuo prompt that Apple’s investigating E Ink shows for future foldable iPhones. Now, Apple certainly investigates numerous issues–and most of them by no means make it throughout the end line to turn into actual merchandise.
However as a long-time admirer of E Ink as a know-how, I’m excited concerning the chance that Apple would possibly use it in future gadgets. E Ink is a distinct segment know-how with some very actual limitations, but it surely’s additionally acquired some large benefits.
What’s E Ink?
E Ink is a show know-how that’s essentially completely different from LCD, OLED, and different show applied sciences. It really works by utilizing electrical energy to set tiny capsules of pigment to point out or disguise. The result’s a floor that works roughly like conventional ink on paper, therefore the identify.
Since an E Ink display screen solely makes use of energy when the display screen is being rewritten, it’s nice for functions during which the show doesn’t replace fairly often. Most individuals know E Ink shows from e-readers like Amazon’s Kindle and Rakuten’s Kobo. These gadgets can have very lengthy battery lives as a result of they’re typically solely utilizing battery energy if you flip the web page.
E Ink crops up in a number of different places, too. There’s a variety of digital signage (suppose worth tags on grocery store cabinets) that’s beginning to use E Ink–one other case the place the textual content stays fastened more often than not, so there’s little or no energy draw. (My favourite E Ink undertaking could also be this one which resembles a flattened unique Mac.)
I like E Ink as a result of it’s simpler on the attention and feels pure in pure mild. Nevertheless, the know-how has numerous liabilities which have led to it not getting used extensively. For starters, it doesn’t emit mild. In daylight, E Ink screens are past reproach, however in darkness, they’re unreadable. (To compensate, most e-readers now include a built-in ring of LED lights across the display screen.)

E Ink Gallery 3 was launched in April, providing an improved colour gamut and quick refresh charges, but it surely’s nonetheless too gradual for multimedia.
E Ink
Worse is the gradual refresh charges of E Ink screens. The refresh fee has elevated over time–on state-of-the-art shows, it’s now 350 milliseconds–but it surely’s nothing just like the ultra-fast refresh charges of laptop shows. Which means it’s inappropriate for animation, video, and just about any interface designed for fast animations. (Final yr I reviewed an E Ink Android pill and attempting to make use of the Android interface at such a low refresh fee was painful.)
E Ink shows additionally don’t provide the ultra-high resolutions of recent Apple shows. And whereas E Ink shows have begun to assist colour (after years of solely supporting shades of grey), the standard is simply now getting as much as par, and the refresh charges are nonetheless fairly gradual.
The place Apple would possibly use E Ink
In response to Kuo, Apple is testing E Ink “for future foldable system’s cowl display screen & tablet-like functions.” It is smart. Foldable gadgets typically fold inward to guard their shows–leaving an outer floor devoid of knowledge. To counteract that, phone-makers have been including supplementary “outer screens” to do issues like show the time and fundamental info widgets whereas others have full-sized OLED shows that clearly use numerous battery life.
Because of its ultra-low-power profile, an E Ink show could be a fairly good match for a canopy show. (Consider how the always-on Apple Watch show has a low-power mode that doesn’t replace the show fairly often, making issues like second fingers disappear with a purpose to save energy.) With a colour E Ink exterior show, Apple might show the time, notifications, and even widgets on a tool’s outer display screen.
However auxiliary E Ink shows aren’t essentially only for foldable telephones. Contemplate a future MacBook that included a low-power E Ink display screen on the skin in order that you could possibly see notifications and different fundamental standing info with out opening it.

E Ink know-how may additionally permit the creation of some fascinating equipment, particularly when coupled with one thing just like the Sensible Connector port on the iPad, which might switch information and provide energy. For instance, think about an iPad sensible cowl that included an E Ink Show (shoutout to reader Adam L. for this concept), to show widgets, standing info, and possibly even static shows from apps, all of which might be seen even in brilliant daylight. Alternately, how about an iPhone case that included an E Ink show on the again for standing widgets?
E Ink might be by no means going to be a mainstream show know-how. The OLEDs and LED/LCD shows of the world present excessive resolutions and refresh charges that may’t be overwhelmed. However there are a lot of niches that E Ink can serve effectively. I’d like to see Apple deploy E Ink’s distinctive traits in some artistic methods.
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