this post was submitted on 25 Dec 2024
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Do light guns work with this?
No, because lightguns require the electron gun in a CRT. Its how the gun knows where you are pointing it
The light gun doesn't need a CRT per-se, but rather the lack of input latency. Games usually flash the targets one per frame, and then it knows based on light level if you were pointing at the target and which one. If it sees light on the third frame then the target must be the third one it flashed. That requires the console to be able to read the light level basically immediately after the console's done scanning out the image but before the phorphor fades out, so the timing is very tight.
If we made OLEDs with direct scanout/zero latency, the guns would work just fine. But because of scalers and filters there's usually at least one frame of latency which means at best you're one target off, or it thinks you're cheating and registers a miss (games usually do a full frame of black first to see if the gun's pointed at a light source, which if you have a frame of latency on the screen it'll register the last frame which will be bright and thus register a cheat/miss).
Add just a frame of latency to a CRT and it'll stop working there too. Later progressive scan CRTs that buffer two frames to deinterlace the signal also don't work with the light guns.
Here it is in action: https://youtu.be/V6XnSvB34y8
Thanks for your response