3 ms·
It doesn't lose content as soon as you lose power. One fun way I saw this was when working on LCD support in a bootloader. You do a quick power cycle and if th
by megous 3y ago
It doesn't lose content as soon as you lose power.
One fun way I saw this was when working on LCD support in a bootloader. You do a quick power cycle and if the framebuffer location is fixed in memory and you don't initialize the contents, you may see faded traces of the picture from previous boot.
- joezydeco 3y agoIn my experience that's more of a side effect from TFT displays. Each pixel has its own gate and can hold a charge for quite a long time. It can also be a side effect of older LCDs, when power is lost the crystal can take a long amount of time to depolarize. If you apply backlight you'll see an afterimage. LCDs are driven by the controller and have no knowledge of the framebuffer location, or even access to the host address and data busses. So if you see an afterimage, that's in the pixel.
- megous 3y agoThe panel was initialized and driven from the host.