In the world of shows, it is typically mentioned that sooner refresh charges are higher. We’ve seen smartphones extensively undertake 120Hz shows previously few years, whereas the PC gaming aspect of issues has seen screens launch at 360Hz and past. But the refresh fee you see along with your eyes is not the one refresh fee you need to care about.
The Honor Magic 6 Pro not too long ago launched with a PWM refresh fee of 4,320Hz, eclipsing the earlier file Honor set with the Honor 90 and Honor Magic 5 Pro final Summer. That quantity is changing into increasingly more essential as ultra-bright cellphone shows are changing into extra frequent, serving to to alleviate eye pressure when utilizing these telephones in mattress at evening.
But whereas an rising variety of firms are beginning to promote elevated PWM refresh charges, only a few of them are keen to speak about the know-how behind the glass. It’s nice to see consideration paid to a subject that might have an effect on hundreds of thousands of smartphone customers, nevertheless it’s additionally irritating to see an absence of transparency from the businesses behind the change motion.
Secrecy and proprietary strategies
Industrial espionage is a time period for a motive. Companies that develop sophisticated, profit-making merchandise do not need to reveal their secrets and techniques to the remainder of the world to be simply copied. That drawback has accelerated tenfold in an period the place merchandise may be cloned on manufacturing traces and bought underneath a random model title on Amazon.
In simply the previous two years, we have seen substantial competitors within the display market from names like BOE, China Star, and Visionox, names you could have by no means even heard of till this article. Until these firms got here alongside, an OLED panel in your favourite gadget was virtually assuredly made by Samsung or LG.
However, Samsung’s dominance within the AMOLED market meant that any choices the corporate made in the end trickled right down to firms utilizing Samsung shows of their merchandise. As any PWM-sensitive particular person will inform you, Samsung AMOLED panels are the worst kind of display for eye well being.
Honor makes use of a BOE panel that will get to five,000 nits brightness underneath the precise situations, but it makes use of fascinating know-how to make sure it isn’t searing your retinas.
Unironically, not one of the greatest telephones for PWM-sensitive people have shows made by Samsung. That’s as a result of a few of Samsung’s largest options depend on flickering the display to trick your eyes into seeing one thing that is not really there, and it wreaks havoc in some people’s brains — together with myself.
That’s a part of why I used to be so excited to get to make use of the Honor Magic 6 Pro, as its PWM fee is 10x the refresh fee of the Galaxy S24 sequence, guaranteeing that I’m in a position to make use of it for lengthy intervals of time.
While that is nice — and it means I can lastly use a cellphone with a cushty display and an excellent digital camera — Honor’s methodology of reaching this excessive fee is way from standard. In brief, which means it would not work for everybody.
Without stepping into the weeds, my gentle meter cannot correctly learn the backlight refresh frequency of the Honor Magic 6 Pro’s display, though I can see what’s taking place with a digital camera. It’s a aspect impact of Honor doing one thing “weird” with its display, so I requested the corporate to enter a bit extra element on it.
Honor’s display panel works in a different way from another I’ve examined, and whereas that works properly for me, it would not for some of us.
Unfortunately, all I used to be met with was a disappointing “sorry, we will not present additional particulars on this know-how.”
This makes it obscure why this cellphone works extremely properly for my eyes however immediately causes ache for different flicker-sensitive customers. It’s an issue I’ve had with different firms, like Google and Samsung, who each have refused to remark or present extra particulars on how their shows work past what every firm’s advertising division supplies.
Meanwhile, Motorola continues to be one of many solely firms that can focus on the subject at size with me. They even boasted how their flicker-reduction know-how ensures that the display is on 99.51% of every obligation cycle, a extra technical time period I’ve by no means heard from another firm.
Motorola is without doubt one of the solely firms talking about the way it actively performs market analysis to learn the way a lot of its buyer base is negatively affected by display flicker.
Motorola has even disclosed to me that it performs market analysis research particular to display flicker in an try to determine what number of Motorola clients are negatively affected by flicker.
This is the type of market-leading conduct I anticipate from an organization like Samsung that might probably negatively have an effect on the well being of a whole bunch of hundreds of thousands of people all over the world. It’s simply as essential as guaranteeing that telephones do not emit dangerous radiation, one thing all producers should do earlier than getting approval by governing our bodies just like the FCC.
Thankfully, I used to be capable of sit down with Bill Maffucci from Kopin Corporation, an organization that makes a speciality of creating shows and lenses for XR gadgets, to debate a number of the finer factors of how shows work. It was a refreshing dialog and it helped me perceive the tenuous relationship between applied sciences like PWM and LTPO.
Technologies like PWM and LTPO complicate the already sophisticated nature of OLED panels, and firms aren’t significantly keen to expose how these work collectively.
Maffucci defined that an OLED display can gentle up and switch off in microseconds — one microsecond is one millionth (0.000001) of a second — that means that firms now have choices for dimming that they by no means had with LCDs. Couple that with the truth that decreasing voltage on an OLED panel an excessive amount of could cause dangerous coloration replica and noise, and you may rapidly perceive why firms have began utilizing PWM — which glints the display on and off quickly — extra typically to manage brightness.
However, this turns into much more sophisticated while you throw LTPO into the combination, a know-how that adjusts the refresh fee of the display primarily based on what’s taking place on display screen. But whereas this feels like it might intervene with the “backlight” cycle on an OLED, Maffucci confirmed to me that almost all LTPO OLEDs do not really alter the refresh fee of the display itself.
Rather, what’s being adjusted is the graphics driver’s rendering fee, and it is often carried out at a quantity that divides evenly into the display’s precise refresh fee. For Honor, which means the 360Hz fee additional complicates the state of affairs in methods the corporate is not keen to expose.
I’ve seen that extra people than ever are flocking to PWM-sensitive on-line communities, and I believe it is each a mixture of extra flickering shows than ever plus people’s raised consciousness that this is an actual concern — not simply one thing of their creativeness.
Even Google is taking part in round with new brightness controls on the system stage, purportedly baking in a brand new “even dimmer” possibility into Android 15. While that might assist some people, the present “additional dim” possibility in Android appears to wreak havoc on delicate eyes.
However, the development for extra eye-friendly cell shows has considerably improved over the previous 12 months. Companies like Motorola are main the best way, however display producers like BOE, Visionox, and China Star all appear to acknowledge that one thing wants to vary to stop extra widespread issues from taking place.
Now, if we might solely get firms to be rather less secretive about issues that are problematic to their customers’ well being, that may be nice. Regardless, I’m glad to see firms like Honor making an attempt to make higher shows, even when the corporate would not need to reveal its secrets and techniques simply but.