Pixel by pixel, a masterpiece.
iMac has always harnessed the latest technology — and taken it further — to make the ultimate all-in-one better and better. And the Retina display is a testament to that. We pushed the limits of pixel density so you can see everything with pinpoint accuracy. We questioned every method of integrated design to achieve a remarkable level of fit and finish. The result? A beautiful, impossibly thin display of color and contrast — and zero compromise.
14.7 million times.
Every millimeter of the Retina display was designed, engineered, and built to the most exacting standards. Something that 14.7 million pixels makes exceedingly clear. As does a 1.4 mm thin display panel designed around the human eye — so every interaction feels as natural as can be. It’s that attention to detail that inspired the all-new 21.5‑inch iMac with Retina 4K display. And just like the Retina 5K display, it delivers a larger color palette with more accuracy.
Wider Color Palette
True-to-life color. Alive onscreen.
Many of the brilliant, unique colors you see in the real world never make it to your screen. A wider color gamut makes more of these real-life colors available on the Retina display. A striking 25 percent more. So whether it’s a sunset at the beach or your favorite football team’s jerseys, you’ll see them just as you saw them — on a display that’s more vibrant than ever.
25 percent more available colors.
100 percent jaw-dropping.
To see color as it appears in real life, you’ve got to capture the ones you’re missing. And a wider color gamut does just that. Retina moves well beyond the typical sRGB display with an all‑new P3 color gamut. This is achieved by shifting the Retina display away from standard white LEDs to advanced red-green phosphor LEDs. Now all three colors — red, green, and blue — are more equally represented and show off real-world color with more balance and precision.
The color you shoot is the color
Many cameras, including DSLRs and professional video cameras, can capture a far wider range of color than the typical sRGB color gamut. And with a new P3-based wider gamut, the iMac Retina display is able to bring more of those real-world colors to the screen. So go back and reprocess those RAW images you’ve saved — and reveal color you haven’t seen in them before.
On top of innovation.
On top of innovation.
Engineering the Retina display involved the precise calibration of 23 layers that make up a display panel that’s just 1.4 mm thin. And out of that process we made advancements to improve not only the resolution but also the quality of the entire iMac display. So in addition to the incredible detail, you’ll see blacker blacks, more vivid colors, and images that practically jump off the screen.
14.7 million pixels.
A more advanced timing controller.
The timing controller, or “TCON,” is the brains of the display — it tells each pixel what to do and when to do it. But even the most powerful timing controllers available couldn’t manage the number of pixels on the iMac Retina 4K and 5K displays. So we created a new one — a single, supercharged chip that’s able to command up to 14.7 million pixels.
Clearing the way for signal
With so many pixels on Retina display screens, clear communication between them requires organic passivation, or “overpass” technology. It separates the pixels from the signals that tell them when and how to light up, preventing any “cross-talk,” or interference, that could result from putting so many pixels so close together. This maintains the quality of the image onscreen while those signals are being transmitted.
Photo alignment. To improve on-axis contrast, we implemented an advanced process called photo alignment. This involves shining UV light to create a uniform terrain across the film coating on the TFT and color filter, so when the liquid crystal molecules are exposed, they lie exactly where they should. Better‑aligned molecules mean you see better contrast when you’re directly in front of the display.
Compensation ﬁlm. A display like this is the kind that people gather around. And at this size, even when you’re looking at the center of the screen, you see the corners at an angle, or off-axis. To make sure the contrast is perfect from every angle, we use a compensation film that controls how the light exits the display. The result is a display with truer colors, no matter where you view it from.
5 millimeters thin.
Just the right size to
do something big.
The first iMac was a revolution: An all-in-one computer that put everything — display, processor, graphics, storage, memory, and more — inside one simple, stylish enclosure. Today’s iMac includes the most advanced, most brilliant desktop display we’ve ever built, and it’s filled with the latest high-performance technologies. Yet it’s still just 5 mm thin at its edge.
at its edge
One of the biggest challenges our engineers faced with the iMac enclosure was how to join the front to the back. The enclosure is so thin, it’s not possible to weld the pieces using traditional methods. So we utilized a process called friction‑stir welding. It combines intense friction-generated heat and pressure to intermix the molecules of the two aluminum surfaces — creating a seamless, precise, and superstrong join.
Both the 21.5-inch and 27‑inch iMac with Retina display feature our highest-resolution displays ever, powerful graphics, and the world’s most advanced desktop operating system. Yet each uses just 1.2 watts of electricity in sleep mode.
iMac is free of many harmful toxins, including mercury, arsenic, beryllium, BFRs, and PVC. It’s also made from materials such as aluminum and glass, which are more likely to be recycled and reused. In fact, the iMac base is made from 30 percent recycled aluminum and the iMac speaker enclosure is made with 30 percent post-consumer recycled plastic.
As a result of all our efforts, iMac far exceeds the stringent low power requirements set by the EPA, giving it ENERGY STAR 6.1 qualification. And it has earned the highest rating of Gold from EPEAT, which evaluates the environmental impact of a product based on how recyclable it is, how much energy it uses, and how it’s designed and manufactured.*