Abstract: A display device receiving image signals from an external device and displaying images, having a data storage storing a display device type identifying data including information about a type of the display device, the display device including a setup control part provided in the external device offering a plurality of user interfaces to set a display condition of the images corresponding to a plurality of display device types; and a microcomputer transferring the display device type identifying data read from the data storage to the setup control part and controlling the display condition of the images, wherein the setup control part identifies the type of the display device based on the display-identifying data received from the microcomputer and provides a user interface corresponding to the identified type fo the display device among the plurality of user interfaces.

Abstract: A method of visually measuring the brightness of ambient lighting around a display device is disclosed. In this method, first, a reference brightness of the display device is determined according to a type of display device. Thereafter, information about locations where the display device is used is received from the user, and illuminance values of the display device corresponding to brightness stages are set based on the reference brightness and the location information. Then, a reference brightness is converted into each of the illuminance values corresponding to each of the brightness stages. The converted images with the illumination values corresponding to the brightness stages are displayed to the user, and an image that has a brightness value nearest to the brightness of ambient lighting is selected, and the brightness value of the selected image is determined as the brightness of ambient lighting.