Philips Flat Display Systems (San Jose, CA), a supplier of active-matrix liquid-crystal displays (AMLCDs), has entered a joint agreement with and taken a minority equity stake in Rainbow Displays Inc. (Endicott, NY; www.rainbowdisplays.com), a developer of large proprietary displays, to produce large AMLCDs using a design process technology called tiling. This process combines several small-sized displays to produce a single 38.6-in.-diameter or larger flat-panel display without visible seams.