Patent ID: 8704894

Claim:
A display device comprising: a circuit board commonalized for various models; a memory portion; and a system microcomputer disposed on the circuit board and storing setting value data of each of the various models, wherein the circuit board comprises: an external memory interface to which an external memory storing model identification information of the display device is detachably attached; and a model identification information reading portion that reads out the model identification information of the display device from the external memory, the memory portion stores the model identification information of the display device read out from the external memory, the system microcomputer, based on the model identification information of the display device read out from the external memory, identifies the setting value data of the display device out of the setting value data of the various models and switches operation by the identified setting value data, and wherein the system microcomputer, at the time of starting thereof, determines if the model identification information of the display device is stored in the memory portion, and if it is determined that the model identification information of the display device is not stored in the memory portion, the model identification information reading portion reads out the model identification information of the display device from the external memory.