Ctrl+J (or View, View Options on the Menu Bar) will bring up the Library View Options dialog box. Select Loupe View then uncheck Show Info Overlay to turn off the permanent display of the info.
Note you can still check the 'Show Briefly When Photo Changes' box for either Loupe Info 1 or 2. As it says, this option will show the info but only for about 5 seconds when you select a new image.
Hope this helps....