ISE 2019: BrightSign Introduces HD4 and LS4 Series of Digital Signage Media Players February 15, 2019 | Home / February 15, 2019 rave-video / ISE 2019: BrightSign Introduces HD4 and LS4 Series of Digital Signage Media Players Look in: ISE ISE 2019: BrightSign Introduces HD4 and LS4 Series of Digital Signage Media Players