DISPLAY DEVICE, DISPLAY SYSTEM AND METHOD FOR CONTROLLING DISPLAY DEVICE

A display device is provided. The display device includes a display, a first communicator configured to communicate with an external device, a second communicator configured to communicate with a remote controller, and a processor configured to control the display to display an image corresponding to an image signal received from the external device through the first communicator, and the processor, in response to a control signal being received from the remote controller through the second communicator while the image is displayed on the display, controls the display to display a user interface (Ul) for changing a channel, and in response to the control signal being received from the remote controller through the second communicator while an image which includes a specific object is displayed on the display, controls the display not to display the UI for changing a channel. 提供了种显示设备。该显示设备包括：显示器；第通信器，被配置为与外部设备进行通信；第二通信器，被配置为与遥控器进行通信；以及处理器，被配置为控制显示器以显示与通过第通信器从外部设备接收到的图像信号相对应的图像，并且处理器响应于在显示器上显示图像时通过第二通信器从遥控器接收到