3 ms·

I don't know why people keep saying that CRTs have uniquely high responsiveness, a high refresh rate OLED display is going to leave a CRT in the dust. A 60 Hz C

I don't know why people keep saying that CRTs have uniquely high responsiveness, a high refresh rate OLED display is going to leave a CRT in the dust. A 60 Hz CRT is going to take at least 1/60th of a second to draw a frame (16.66 ms), while a 240 Hz OLED will take 1/4 the time (pixel response times of OLEDs are less than a ms)

chongli 3y ago
That's an oversimplification of the physics. CRT televisions have very low persistence phosphors. If you look at high-speed video of a CRT during a raster scan, the line is visible for far less time than the entire frame [1]. This technique relies on persistence of vision [2] to create the illusion of a complete frame. If you want to calculate the response time of a single dot on the phosphor, it is way down into the microseconds. I don't know enough about OLED displays to comment. I do know that LCDs don't even come close to the speed of CRTs at transitioning through high contrast images, the key to producing fast and responsive motion of sprites (which are high contrast against the background by design in most retro games). [1] https://www.youtube.com/watch?v=3BJU2drrtCM https://www.youtube.com/watch?v=3BJU2drrtCM [2] https://en.wikipedia.org/wiki/Persistence_of_vision https://en.wikipedia.org/wiki/Persistence_of_vision
- WithinReason 3y ago
  Sure, but single pixels are irrelevant if the responsiveness is dominated by the time to draw a frame. OLEDs have gray-to-gray response times below a ms as I said (https://www.youtube.com/watch?v=9GH6ngr-wws&t=269s https://www.youtube.com/watch?v=9GH6ngr-wws&t=269s)
  - chongli 3y ago
    This whole discussion we’ve been talking about displays for playing retro games, so 240Hz refresh rate in the display does not apply. All of the games and the console hardware are hard-coded to run at 60Hz. Anyway, have you looked at a game running on a CRT side by side with an OLED? You can’t compare the numbers on paper. Even though it takes 1/60th of a second to draw the entire frame, the beam is travelling much much faster than that. Since the frame is completely dark the rest of the time, and the human eye has persistence of vision, the perception of motion is dramatically enhanced by the effect. Furthermore, lightgun based games such as Duck Hunt rely on the precise timing of the CRT raster scan to operate and earlier games (such as on the Atari 2600) do so as well, because they use “racing the beam” as a rendering technique to get the most out of slow hardware. Lastly, all of these games are designed to run on 4:3 monitors. Are there any 4:3 60Hz OLEDs designed for retro gaming?

chongli 3y ago

That's an oversimplification of the physics. CRT televisions have very low persistence phosphors. If you look at high-speed video of a CRT during a raster scan, the line is visible for far less time than the entire frame [1]. This technique relies on persistence of vision [2] to create the illusion of a complete frame. If you want to calculate the response time of a single dot on the phosphor, it is way down into the microseconds. I don't know enough about OLED displays to comment. I do know that LCDs don't even come close to the speed of CRTs at transitioning through high contrast images, the key to producing fast and responsive motion of sprites (which are high contrast against the background by design in most retro games). [1] https://www.youtube.com/watch?v=3BJU2drrtCM https://www.youtube.com/watch?v=3BJU2drrtCM [2] https://en.wikipedia.org/wiki/Persistence_of_vision https://en.wikipedia.org/wiki/Persistence_of_vision

WithinReason 3y ago
Sure, but single pixels are irrelevant if the responsiveness is dominated by the time to draw a frame. OLEDs have gray-to-gray response times below a ms as I said (https://www.youtube.com/watch?v=9GH6ngr-wws&t=269s https://www.youtube.com/watch?v=9GH6ngr-wws&t=269s)
- chongli 3y ago
  This whole discussion we’ve been talking about displays for playing retro games, so 240Hz refresh rate in the display does not apply. All of the games and the console hardware are hard-coded to run at 60Hz. Anyway, have you looked at a game running on a CRT side by side with an OLED? You can’t compare the numbers on paper. Even though it takes 1/60th of a second to draw the entire frame, the beam is travelling much much faster than that. Since the frame is completely dark the rest of the time, and the human eye has persistence of vision, the perception of motion is dramatically enhanced by the effect. Furthermore, lightgun based games such as Duck Hunt rely on the precise timing of the CRT raster scan to operate and earlier games (such as on the Atari 2600) do so as well, because they use “racing the beam” as a rendering technique to get the most out of slow hardware. Lastly, all of these games are designed to run on 4:3 monitors. Are there any 4:3 60Hz OLEDs designed for retro gaming?