Lightgun News- Some News from HAPP

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davidrfoley:
All light guns require a very bright image on screen (ie white screen) in order to pick up the raster gun to coordinate the x,y location that you are aiming at. This is why light gun games flash the screen white when you pull the trigger. You can attempt to constantly track the gun without flashing the screen, but black areas of the screen will become dead zones.

geocab:
Is that why light guns don't typically work well with LCD screens? Because they can't do white as brightly as a CRT?

davidrfoley:
No, light guns don't work with LCD's because there is no raster painting the screen. The way a raster display works is there is a gun at the back of the tube that moves across the tube. one line at a time painting the image against a phosphor coating on the back of the glass. When excited by the beam, the phosphor holds the charge momentarily, long enough that the gun can move from top to bottom without the imaging noticeably fading. This is tubes have a little glow to them after you shut them off. There is a sensor inside the gun that takes a snapshot of the screen and waits for the beam to cross past the sensor, and then it takes the refresh timing of the display and figures out where the where the gun is pointing.

geocab:
Thanks for the explanation, David. I'm still researching cabinets and trying to decide what I want to include, etc. and I think I'm pretty much stuck with a CRT monitor since I want to use light guns.

TeutonicDarkness:

--- Quote from: davidrfoley on February 26, 2009, 11:07:31 am ---All light guns require a very bright image on screen (ie white screen) in order to pick up the raster gun to coordinate the x,y location that you are aiming at. This is why light gun games flash the screen white when you pull the trigger. You can attempt to constantly track the gun without flashing the screen, but black areas of the screen will become dead zones.

--- End quote ---

OK that still doesn't answer my question?
So let me ask again in a very simple easy to understand way....

If I use this supposed device with a arcade lightgun playing Mame;
will The cursor move with where I point the gun?
Say for example I wanted to try this device with Terminator 2
would the Cursor track with the gun movement or only
( lock in when I fire)? The act Labs guns do not track but
the cursor only moves position on screen when you fire there.

Is that the case with this as well?

I hoped I explained myself a little better now.. :)

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