Tag: pixel response

BenQ EX3501R 3440×1440 21:9 35″ Curved VA monitor – AMA modes revisited for response time measurements (WHL #33F3)

Finally got a photo diode for re-measuring the panel response time of the BenQ EX3501R. It’s a Vishay BPW34 type with 7.5mm² of active area, 70pF of capacitance at 0V, 600 to 1050 nm of spectral bandwidth (Reichelt claims quite a bit more?), peak sensitivity at 900nm and a relatively big half sensitivity angle of 65 degrees. Yeah, capacitance goes down when reverse biasing it, whatever, just slap it onto a probe and let’s go:

It’s not perfectly aligned at the screen, but that shouldn’t do much. I’m running GIFs with #000000, #7F7F7F and #FFFFFF frames, flickering at 20Hz. […]

28th January 2018 29th January 2018 By Bzzz In 1 Comment

BenQ EX3501R 3440×1440 21:9 35″ Curved VA monitor – AMA modes (WHL #33F1)

This post is partially outdated – please have a look at the updated version #33F3 with proper photo diode measurements as well!

 

So…I tried measuring response time of the monitor, and I didn’t really succeed. I’m missing MY PRECIOUS photo diode, so doing the same thing with an LED…is pretty meh. Don’t take these for real, time must be off due to high capacitance (“high” being some 10pF including leads?) and the LED not being as sensitive as a proper photo sensor diode.

Well anyway, the shape of the traces tells us a little about the AMA setting of the display, which is BenQ speech for the Advanced Motion Acceleration or pixel response / panel overdrive setting. […]

3rd December 2017 29th January 2018 By Bzzz In No Comment