Abstract: A display panel has an evacuation port at one side thereof, and the opening area of the evacuation port increases toward the periphery of the display panel. The display panel also has a frame member in the opening, and the height of the frame member lowers toward the inside of the display panel. According to the invention, by improving the evacuation efficiency in the airtight container and improving the vacuum level in the display panel in a short period of time, the electron emission characteristic is stabilized and the lifetime thereof is increased, allowing a high-quality, reliable image display to be provided.