Blur Busters Forums

Chief Blur Buster wrote:

Q83Ia7ta wrote:XL2411T has 180 Hz PWM.

My XL2411T (Version 1) seemed to have this PWM at 360Hz (during 120Hz). I could easily see it occuring as a triple image effect in a TestUFO motion test (multi-image PWM artifact)

"(18 kHz instead of 180 Hz)" from
http://display-corner.epfl.ch/index.php ... ht_signals

Yeah, the 180 vs 360 confusion, I'm wondering about that.

Q83Ia7ta wrote:

Chief Blur Buster wrote:

Q83Ia7ta wrote:XL2411T has 180 Hz PWM.

My XL2411T (Version 1) seemed to have this PWM at 360Hz (during 120Hz). I could easily see it occuring as a triple image effect in a TestUFO motion test (multi-image PWM artifact)

"(18 kHz instead of 180 Hz)" from
http://display-corner.epfl.ch/index.php ... ht_signals

I'm talking about the XL2411T (my unit appeared to have 360Hz PWM during 120Hz refresh), not the XL2411Z (PWM-free).
Also, the 18KHz PWM is actually made essentially PWM-free via the smoothing electronics:

so the fast PWM signal is converted to some analog maximal LED current by the LED driver and the fast PWM frequency cannot be found in the luminance traces anymore – the backlight is truly flicker-free.

- From the same page you linked.

Also, I think some monitors did 180Hz PWM during 60Hz, but went up to 360Hz PWM during 120Hz. That may be where the confusion of the 180/360 comes from for the XL2411T, or the different revisions (e.g. XL2411T firmwares). That might be it? I'll ask StrobeMaster.

Where can I get the board?