Abstract: A display apparatus includes a field emission device including a first electrode serving as a display plate on which phosphor material is coated, and a second and a third electrode for emitting electrons to be ejected onto the first electrode, wherein the phosphor material emits light when the electrons are ejected thereonto; a voltage application unit for applying driving voltages to the second and the third electrode to control an emitted amount of the electrons in accordance with display data and allow a specific part of the phosphor material to emit light; and a brightness control unit for controlling an emission brightness of the phosphor material. The brightness control unit includes a first electrode current detection unit, a display data amount estimation unit, a comparing unit, a preset value generation unit, an average turn-on rate detection unit, an average turn-on rate analysis unit, and a selection unit.

Abstract: A display apparatus includes a field emission device including a first electrode serving as a display plate on which phosphor material is coated, and a second and a third electrode for emitting electrons to be ejected onto the first electrode, wherein the phosphor material emits light when the electrons are ejected thereonto; a voltage application unit for applying driving voltages to the second and the third electrode to control an emitted amount of the electrons in accordance with display data and allow a specific part of the phosphor material to emit light; and a brightness control unit for controlling an emission brightness of the phosphor material. The brightness control unit includes a first electrode current detection unit, a display data amount estimation unit, a comparing unit, a preset value generation unit, an average turn-on rate detection unit, an average turn-on rate analysis unit, and a selection unit.

Abstract: A field emission type display device including a container formed of an anode substrate, a cathode substrate and side wall portions, and a cover member mounted at the container to form a getter room. An anode lead is securely fixed on the cover member so as to be derived outward from the outer wall confronting the anode substrate. Two wires are attached to the front end of the anode lead. When the cover member is mounted on the container, the curved portions of the two wires is pressed against the anode terminal formed on the anode substrate extended to the end of the anode substrate to secure electric conduction between the anode terminal and the anode lead. This structure provides easy-to-use anode leads which can be simply derived as electrodes.