There is no way to identify the display from just eyeing the laptop.
HP has Quickspecs document for each of their models. 845 G7 has three different FullHD displays for this model:
- 250nit
- 400nit
- 1000nit w/ Sure View
The 1000 nit sureview model can be identified if the keyboard F2 button has the Sureview function (for Fn+F2 key combination)
HP Partsurfer website should show the laptop parts associated with the serial number.
In Windows you can see the display identification string in Device Manager/Displays/Integrated Monitor. Select Details tab and then the Device IDs in the drop down list. Then try googling for the display string, hopefully finding answers...