DISPLAY APPARATUS AND CONTROL METHOD THEREOF, UPGRADING APPARATUS, DISPLAY SYSTEM

摘要

PURPOSE: A display device, a control method, an upgrading device, and a display system thereof are provided to prevent booting operation when one or more display devices are replaced to unauthenticated devices. CONSTITUTION: An image processing unit (120) processes an image signal of an image supply source (300). An upgrading device (200) for upgrading an image process is connected to a connection unit (110). A control unit (160) allows or blocks a booting operation by comparing a first paring key generated based on a second identification (ID) of the upgrading device and a first ID of a display device (100) with a second pairing key stored in a server (310). [Reference numerals] (110) First connection unit; (120) First image processing unit; (130) Display unit; (140) User input unit; (150) First storage unit; (160) First control unit; (170) Locking unit; (210) Second connection unit; (220) Second image processing unit; (250) Second storage unit; (260) Second control unit; (300) Image supply source; (310) Server