Patent ID: 7429242

Claim:
An electronic endoscope apparatus comprising: an endoscope including an image pick-up device for converting a subject image into an image signal; a signal processing device for processing the image signal, the signal processing device including: a first signal processor that implements a signal process of the image signal and outputs to a first display device the processed image signal with a first television signal format having a first resolution; and a first connector adapted for connecting the signal processing device to a second signal processor; an option substrate having the second signal processor and a second connector for connecting the second signal processor to the signal processing device via the first connector, the second signal processor implements the signal process of the image signal and outputs to a second display device the processed image signal with a second television signal format having a second resolution that is higher than the first resolution; and a connection detector for detecting a connection of the second connector with the first connector and notifying a user of the connection, the connection detector including a connection detecting section that detects the connection, and a character information generating section that changes a displayed character information based on a signal from the connection detecting section.