Display device, vent tube with glass ring, phosphate glass ring, and method of producing the same

A display device comprising:

• a panel having a hole formed therein;
• a phosphate glass member;
• and
• a tube mounted on the panel via the phosphate glass member so as to cover the hole,
• wherein the tube has:
• a tubular portion;
• and a flange portion connected to the tubular portion,
• the tube has, as the tubular portion:
• a narrow portion;
• and an enlarged diameter portion having a larger diameter than that of the narrow portion located closer to the panel than the narrow portion is,
• the flange portion serves as an end face of the tube located on the side of the hole,
• the phosphate glass member is bonded to at least a partial area of the inner wall surface of the enlarged diameter portion of the tubular portion and to a partial area of the panel, and
• the entire periphery of an end face of the tube located on the side of the hole is in contact with the panel.