Posted by robotnikman 6 days ago
There are also mini LED laptop for creative work. Few more things to check before buying new laptop.
- The LEDs for a mostly dark region with a point source are too bright so the point source is the correct brightness. Benchmark sites call this "blooming" and ding displays for it, so new ones pick the other problem:
- The LEDs for mostly dark regions with a point source are too dim so the black pixels don't appear gray. This means that white on black text (like linux terminals) render strangely, with the left part of the line much brighter than the right (since it is next to the "$ ls" and "$" of the surrounding lines). Also, it means that white mouse pointers on black backgrounds render as dark gray.
For creative work, I'd pick pretty much any other monitor technology (with high color gamut, of course) over mini LED. However mini-LED is great if you have a TV that is in direct sunlight, since it can blast watts at the brightest parts of the screen without overheating.
24Hz - now you can correctly play movies.
30Hz - NTSC (deinterlaced) including TV shows + video game emulators.
50Hz - (24 * 2 = 50 in Hollywood. Go look it up!) Now you can correctly play PAL and movies.
120Hz - Can play frame-accurate movies and NTSC (interlaced or not). Screw Europe because the judder is basically unnoticeable at 120Hz.
144Hz - Can play movies + pwn n00bs or something.
150Hz - Unobtanium but would play NTSC (deinterlaced), PAL and movies with frame level accuracy.
240Hz - Not sure why this is a thing, TBH. (300 would make sense...)
Ignoring switching costs, keeping a sample-and-hold LED at 0%, 50% and 100% brightness all cost zero energy. For an OLED, the costs are closer to linear in the duty cycle (again, ignoring switching costs, but those are happening much faster than the framerate for OLED, right?)
(Also, according to another comment, the panel manufacturer says this is TFT, not OLED, which makes a lot more sense.)
So to ignore the colorwise overhead lets pretend we just have a single color channel.
You could even arrange all LED's in series and short out (bypass with mosfet) those LED's that should NOT be lit.
Then you can just energize an inductor until the appropriate current is reached and then flash a certain amount of charge through the LED string.
One can choose between reusing the same inductor for the different currents or having separate inductors each for their own current levels.
It would require bypass transistors for each LED, but there are support electronics for each LCD pixel too, as a comparison.
The 24-bit color display (3x8) would actually result in many more bit planes after gamma deflating to the linear photon proportional domain.
LED backlights using PWM likewise don’t change the sample-and-hold nature of LCD panels.
My understanding is that PWM switching costs aren’t negligible, and that this contributes to why PWM frequencies are often fairly low.
I'm not even sure how they got their 48% figure. Sounds like a whole-system measurement, maybe that's the trick.
But to the rest of the world variable refresh rate existed for years by then. As is with most Apple "inventions".
In this case the patent goes back to 1982: https://patents.google.com/patent/US4511892A/en
What's new here is the 1 Hz minimum.
I'm not sure if this LG display will have the same issue, but I won't be an early adopter.
The display has a refresh rate of 120hz when needed. The low refresh rate is for battery savings when there is a static image.
Variable refresh rate for power savings is a feature that other manufacturers already have (apple for one). So you might already be an early adopter.