Another video wall panel test.
Added 2019-01-20 03:10:37 +0000 UTCJust a bit of fun to see what sort of refresh rate I could achieve using a low end processor generating a pattern in real time as the display is multiplexed.
https://www.youtube.com/watch?v=NRZ2ECHl5FQ
It looks a lot more colourful than the video has picked up. The difficulty of filming a moving light source.
It's using an LFSR (linear feedback shift register) implemented in software so it can be reseeded at the start of each multiplex scan. The random data is converted to colours and then fed in serially for each line before it is displayed as the next line of data is generated.
Other interesting things worthy of note. The individual red, green and blue drive circuits have the current set to create a good white. That means the reds draw most current followed by green and then blue with the lowest current.
Comments
I'm guessing an interaction between the PWM/refresh frequency and the frame rate of the camera - kind of like a car wheel looking like it's not rotating when the car's going just the right speed so the rotation syncs with the frame rate.
2019-01-21 08:12:11 +0000 UTCIt's good quality plastic. You could remove the screen and turn the bag into a handy portable Buckfast dispenser!
mikenco
2019-01-21 00:22:46 +0000 UTC
