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CRT, LCD and OLED pixel filmed on high end camera equipment!

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CRT, LCD and OLED pixel filmed on high end camera equipment!

Postby Mr.Fruitbaskets » 20 Jan 2018, 08:22

phpBB [video]


Heres a neat video that shows pixels changing in real time under some of the strongest magnification you'll see, and serious slow motion too ;)
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Re: CRT, LCD and OLED pixel filmed on high end camera equipm

Postby RealNC » 20 Jan 2018, 16:15

Very nice capture of the CRT electron scanline.

This actually made me think... Theoretically, an OLED screen could emulate that, right? Right now, rolling scan OLED has a thick "scanbar" with the pixels switching immediately to black after the scanbar passes over them. Wouldn't it be possible to fade the pixels to black instead to better simulate CRT phosphor decay? Shouldn't this make flicker softer and less aggressive to the eye?
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Re: CRT, LCD and OLED pixel filmed on high end camera equipm

Postby Chief Blur Buster » 20 Jan 2018, 17:12

RealNC wrote:Very nice capture of the CRT electron scanline.

This actually made me think... Theoretically, an OLED screen could emulate that, right? Right now, rolling scan OLED has a thick "scanbar" with the pixels switching immediately to black after the scanbar passes over them. Wouldn't it be possible to fade the pixels to black instead to better simulate CRT phosphor decay? Shouldn't this make flicker softer and less aggressive to the eye?

Fantastic video. And yes, fantastic idea!

Yes, I wrote about that on AVSFORUM.

Unfortunately a fade complicates the OLED tech:
-- It would require multiple pixel update cycles. Different refresh passes to "fade" an OLED pixel since it doesn't have a self-decaying function like a phosphor.
-- One could add a decay capacitor to an OLED pixel, but that can make image calibration difficult if pixel fade starts creating all kinds of artifacts (e.g. phosphor ghosting effects for bright colors).

I'd rather them focus 1000Hz instead of simulated fade. It may even be easier to engineer. Blurless sample-and-hold (Strobeless ULMB) can be superior to CRT once the technology finally arrives.

However, it'd be useful modes of operation though! A theoretical 1000Hz display can partially simulate phosphor fade of a lower-refresh rate via BFI + fading intermediate refresh cycles (in 1ms granularity steps).
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