LG's shown off plenty of display prototypes that may or may not ever wind up in actual products, but it looks like two of them are about to get real -- a recent SEC filing has revealed that LG is expecting to put both a 9.7-inch color e-paper display and a 19-inch flexible e-paper display into mass production by the end of the year. Details beyond that are expectedly light -- including any word on what type of products they'll be used in -- but the 19-inch display is apparently the same one we first saw back in January (pictured above). That could conceivably be used for a newspaper-sized device, or possibly things like digital signage, which might be a tad more likely given the constraints in tacking a touchscreen layer and other components on top of the display.