Panasonic supplies B&O with all panels.
PHP (Hitachi) supplies Philips with 37" and 42" (ALiS 1024i) panels.
NEC supplies Philips with 50" 768p panels.
Samsung supplies Philips with 480p panels.
Yamaha is supplied by Panasonic.
And finally NEC supplies JVC with 35" panels.
Fujitsu Generals are more expensive because of warranty levels and support.
Even though the glass is Panasonic, the processing unit is made by Fujitsu and is at another level e.g. better picture quality and no screen retention.
I think the same is true for B&O, but the extra premium for B&O is a lot more than that for Fujitsu General.