Take a picture with a fast shutter speed (1/640th worked best on my 100Hz display): you can actually catch the monitor between refreshes!!! It's totally black, but the monitor light is on.
1/60th (sorry for blur; new camera and haven't figured out all the settings!)
1/640th
Fun quirk if you have Lightboost + a decent camera
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Re: Fun quirk if you have Lightboost + a decent camera
You got that correct!ikjadoon wrote:Take a picture with a fast shutter speed (1/640th worked best on my 100Hz display): you can actually catch the monitor between refreshes!!! It's totally black, but the monitor light is on.
Those are interesting camera behaviours with strobe backlights.
LightBoost default settings (100%) means the backlight is strobing about 2.4 milliseconds (1/400th of a second) 120 times per second. This means there's almost 7ms of blackness between each flash. That's approximately 1/150th of a second of blackness between each flash. So if your camera shutter is far faster than the 1/150sec setting, you may successfully capture these black moments -- just exactly as you did.
Another interesting exercise is to use the high speed video feature of your camera. If your camera has a 240fps or 480fps high speed feature (e.g. GoPro Hero3 (240fps), Casio EX-FC200S (1000fps), Casio EX-ZR200 (1000fps), EX-F1 (1000fps),Fuji HS10 (1000fps), Nikon1 J1 (1200fps), Nikon1 J2 (1200fps), Nikon1 V2 (1200fps). I now have the Casio EX-ZR200 which is slightly better than the EX-FC200 because it has a bigger lens. Both cameras cost less than $300 off Amazon, and are really convenient for capturing the performance of strobe backlights, or game engine input lag. Cheap high speed video is very low-resolution (postage stamp size) but it's perfectly fine for strobe backlight testing.
High speed video of LightBoost (high speed video of http://www.testufo.com/flicker)
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