LCD screen refreshes not from top to bottom?

Advanced display talk, display hackers, advanced game programmers, scientists, display researchers, display manufacturers, vision researchers. The masters on Blur Busters.
Post Reply
Q83Ia7ta
Posts: 719
Joined: 18 Dec 2013, 09:29

LCD screen refreshes not from top to bottom?

Post by Q83Ia7ta » 03 Mar 2016, 15:44

While testing 1200fps camera I've noticed strange refreshing from bottom to top at lowest case (7,5ms).
Monitor is Asus PG278Q. Refresh rate is 144Hz. 1200fps capture. Logitech G100S (500Hz). ezQuake with stable 1200fps.
LED connected to right mouse button and that button binded to changed crosshair color to green. Left mouse button changes crosshair color to black.
https://www.youtube.com/watch?v=1EKZUUj0Qa4 playback is 7.5 fps
I saw such from bottom to top update only at ~1-5% of measurements.
Captured height of screen is about 20%.
Is it ok?

User avatar
sharknice
Posts: 282
Joined: 23 Dec 2013, 17:16
Location: Minnesota
Contact:

Re: LCD screen refreshes not from top to bottom?

Post by sharknice » 04 Mar 2016, 18:52

Probably because you don't have VSYNC on.

User avatar
lexlazootin
Posts: 1251
Joined: 16 Dec 2014, 02:57

Re: LCD screen refreshes not from top to bottom?

Post by lexlazootin » 06 Mar 2016, 09:57

screen tear, unless you v-sync it you will always get them.

Post Reply