How can I connect this LCD panel to my Raspberry Pi?
I believe what you have suggested using is very similar to this https://laborjag.com/venta/raspberry-pi/7-raspberry-pi-lcd-touch-screen-display-with-kit-hdmi-vga-input-driver-board/ which is for a 7" LCD screen, and is designed to work with the Raspberry Pi, so what you want to use should in theory work. I've also looked around a bit and seen other people use similar driver boards with 15.4" screens. So in summary, it should work!