If we take a closer look, the Ultra HD 4K does not have 4000 or more pixels in one line, but 3840, and the same thing is with Full HD that does not have more than 2000 pixels in one line, but 1920.
ຖ້າພວກເຮົາພິຈາລະນາເບິ່ງໃກ້ໆ, Ultra HD 4K ບໍ່ມີ 4000 ຫລືຫລາຍກວ່າພິກະເຊນໃນເສັ້ນດຽວ, ແຕ່ 3840, ແລະສິ່ງດຽວກັນກັບ Full HD ທີ່ບໍ່ມີຫລາຍກວ່າ 2000 ພິກະເຊນໃນເສັ້ນດຽວ, ແຕ່ປີ 1920.