Hi!
The 2K resolution is a generic term for a display with a resolution of 2000 pixels or its content. The digital Cinema Initiatives (DCI) defines the 2K resolution as 2560*1440 and 2048*1556 is the treshold for entering 2K (Film production).
Occasionally, 1920*1080 (16:9) of 1080p has been included into the 2K resolution definition. Although 1080p has the same vertical resolution as DCI 2K resolutions (1080 pixels), it has a smaller horizontal resolution below the range of the 2K resolution formats. Most manufactures define 1920*1080 as 1080p according to old specifications (the DCI industry standards do not recognize 1080p as a 2K resolution).
The 2K display requires supporting displays and TCs. Currently, Huawei TCs ST5110 and ST6110 (maximum resolution: 2560*1600) support the 2K display.