The Secrets Behind Samsung’s Privacy Screen - iFixit

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The annual smartphone release cycle has become predictably iterative while true hardware innovation has been overshadowed by marketing hype. Apple’s 2025 lineup gave us an uninspired colorway and a regressive redesign that actually hinders battery repairs—a disappointing shift from the repair friendly dual-entry design of the iPhone 14 and the electrically releasing adhesive of the iPhone 16. Samsung hasn’t been much better; since introducing their handy battery pouches, they’ve largely coasted on predictable spec bumps and larger vapor chambers.

So when Samsung announced a Privacy Screen implemented in the OLED panel, you can bet it caught my attention. Breaking the cycle of mundane updates, the baked-in privacy feature is controllable through software to restrict viewing angles and thwart snooping shoulder-surfers. I was eager to see the mechanics behind this anti-eavesdropping tech, so naturally it needed the iFixit teardown treatment.

Per Samsung’s marketing material, the screen can be set to restrict viewing angles on demand, the goal being to prevent shoulder surfers from eaves dropping uninvited.

That’s cool and all, but you can achieve more or less the same with a $10 privacy screen. Where the fancy Samsung Privacy Screen shines is in its ability to make specific sections of a screen private. Think notifications of a sensitive nature that you want to receive but don’t want to share with nosy onlookers on the subway, in the mall, or when your parole officer happens to be looking over your shoulder.

The Samsung Privacy Screen’s pixel-based answer is more sophisticated than the micro-louver technology used in cheap privacy screens. And thanks to our DSX2000 from Evident Microscopy, we can actually see it.

A close up look at the S26 Ultra’s Privacy Display

But the S26 Ultra’s screen isn’t without its drawbacks. As widely reported already, the colors aren’t as vibrant as last year’s S25 Ultra, and to see why we have to take a closer look at how the Privacy Display is constructed—and what Samsung had to compromise to implement the technology.

Here’s the OLED from last year’s S25 Ultra. You may have seen something like this before; a repeating pattern of pixels, in Samsung’s patented diamond pixel pattern, in this case, all existing on a single, level, plane.

A magnified view of the S25 Ultra’s display panel

The combination of pixel density and light dispersion allows these OLED pixels to “mix” colors from those primary reds, greens, and blues. Unsurprisingly, our eyes aren’t able to distinguish the individual pixels measuring 10 microns across, so manipulating the light intensity of each pixel fools our brains into seeing a mixed set of colors resulting in pinks, oranges, and around 1 billion other color variations (being male, I can distinguish very few of these and name even fewer).

The Privacy Display on the S26 Ultra also uses a repeating diamond pattern (Samsung’s patented Round Diamond Pixel pattern), but notice that the pixels are now distributed on two planes. What’s more, every other set of four pixels appears to have a structure surrounding it.

A close up of the S26 Ultra’s display panel reveals Samsung’s patented Round Diamond Pixel layout

According to Samsung’s marketing material, the raised ridges ensconce each set of alternating pixels thereby reducing the angle at which light can escape. The pixels on the lower plane don’t have these structures and allow light to escape freely at a wider angle.

A 3D analysis of the S26 Ultra’s screen reveals the structures surrounding a subset of pixels

That means that the privacy display is active when the pixels in the “valleys” are off, leaving only the pixels buried inside those structures switched on. At this point you might begin to see a problem. With privacy mode on, half the pixels are inactive. That means half the amount of light reaching your eyes, and half the color vibrancy.

But here’s the thing, I doubt that the average person is going to have Privacy Display turned on all the time. For day to day usage, the privacy display function won’t be on for anything but the occasional pop up notification.

Unfortunately, that’s not the biggest tradeoff to these new screens. Take a look at the S25 Ultra alongside the S26 Ultra, both set to 50% brightness and with the S26 Ultra’s Privacy Display turned off. The magnification is the same across both recordings.

Both screens support a resolution of 3120×1440 meaning the pixel density is the same. It also seems that the S26 Ultra’s screen is brighter on the blues and greens but noticeably weaker on the reds. So why are people reporting that the S26 Ultra’s screen...