Samsung may be developing a gadget with three hinges connecting four folding panels that extend to create a single, long display.The device appears to form an incredibly large display when unfolded, while the four panels combine to create a fairly thick bar when folded.The inner panels fold towards each other, while the outermost panels fold on top of the inner ones utilizing two hinges.It is unknown whether Samsung intends to commercially launch the four-panel foldable, but it has showcased various prototypes in the past.