Also, 2017 iPad LCD is compatible with iPad Air 1. If you install the 2017 iPad LCD on iPad Air 1, it will be brighter. On the contrary, the iPad Air 1 LCD can also work in 2017 iPad, but it will make the display dim, the left edge has weird back-light leak, and the home button won't work, according to iFixit.
The iPad Air 1 digitizer works fine in an iPad 2017.