Abstract: In an embodiment of the present invention, a proton conductive oxide fuel cell comprising an electrode substrate, a proton conductive oxide electrolyte layer positioned on the electrode substrate, a proton conductive oxide reaction prevention layer positioned on the electrolyte layer, and a proton conductive oxide air electrode layer positioned on the reaction prevention layer, wherein the reaction prevention layer is composed of ABO3-? structured perovskite proton conductive oxide, may be provided.

Abstract: The present invention provides an electron gun for a cathode ray tube that forms a main focus lens of a maximum diameter within a neck of a limited diameter to thereby realize high focus performance and resolution characteristics. The electron gun includes a single cathode emitting electrons; first and second grid electrodes forming a triode portion with the cathode; a third grid electrode provided subsequent to the second grid electrode; a fourth grid electrode provided subsequent to the third grid electrode and to which a focus voltage is applied, the fourth grid electrode including an input section positioned opposing the third grid electrode and an output section connected to the input section; a fifth grid electrode mounted surrounding part of the fourth grid electrode with a predetermined gap therebetween and to which an anode voltage is applied; and a connector interconnecting the third grid electrode and the fifth grid electrode, wherein the output section of the fourth grid electrode is exposed.

Abstract: The present invention provides an electron gun for a cathode ray tube that forms a main focus lens of a maximum diameter within a neck of a limited diameter to thereby realize high focus performance and resolution characteristics. The electron gun includes a single cathode emitting electrons; first and second grid electrodes forming a triode portion with the cathode; a third grid electrode provided subsequent to the second grid electrode; a fourth grid electrode provided subsequent to the third grid electrode and to which a focus voltage is applied, the fourth grid electrode including an input section positioned opposing the third grid electrode and an output section connected to the input section; a fifth grid electrode mounted surrounding part of the fourth grid electrode with a predetermined gap therebetween and to which an anode voltage is applied; and a connector interconnecting the third grid electrode and the fifth grid electrode, wherein the output section of the fourth grid electrode is exposed.

Abstract: An electron gun for a color cathode ray tube includes a triode having a cathode, a control electrode and a screen electrode for producing an electron beam, and first, second, third and fourth focus electrodes and a final accelerating electrode for accelerating and focusing the electron beam. A predetermined static focus voltage is supplied to the first and third focus electrodes, a dynamic focus voltage synchronized with a deflection signal is supplied to the second and fourth focus electrodes, and an anode voltage higher than the highest dynamic focus voltage is supplied to the final accelerating electrode. Thus, by means of a dynamic and axially symmetrical lens, astigmatism of the electron beam spot on the periphery of the screen is improved, thereby forming an almost circular beam spot.

Abstract: An electrode for electro gun of a cathode ray tube includes an external electrode member formed on the top of a cup-shaped body and having a large-diameter electron beam passing hole through which three electron beams pass commonly, and an internal electrode member inserted into the external electrode member and having three separate electron beam passing holes on the top of the internal electrode, wherein protrusions are formed on the outer surface of the internal electrode member, thereby enhancing the assembly precision of the external and internal electrode members.

Abstract: A dynamic focusing electron gun is provided which includes a cathode and first and second grids which collectively form a triode, a plurality of electrodes for forming an auxiliary lens, and an anode installed adjacent to the final electrode of the auxiliary lens for forming a main lens. Electron beam passing holes are formed in the electrodes of the auxiliary lens so that an electron beam is repeatedly and alternately deformed in the sequence of the vertically-elongated and then horizontally-elongated (or horizontally-elongated and then vertically-elongated) shapes, constituting more than two quadrupole lenses of opposing polarities.

Abstract: An electron gun for a color cathode ray tube includes a cathode, control and screen electrodes forming a triode, 1st to 3rd focus electrodes forming a first unipotential prefocus lens, 4th and 5th focus electrodes forming a second unipotential prefocus lens with the 3rd focus electrode, a 6th focus electrode forming a bipotential prefocus lens with the 5th electrode adjacent thereto, and an accelerating electrode for forming a bipotential main focus lens with the 6th focus electrode. Vertically-elongated electron beam passing holes are respectively formed in the outgoing planes of the 1st, 3rd and 5th electrodes and horizontally-elongated electron beam passing holes are respectively formed in the incoming planes of the 3rd, 5th and 6th focus electrodes.

Abstract: An electron gun for a color cathode ray tube includes a cathode, a control electrode and a screen electrode constituting a prepositioned triode. First, second, third and fourth focus electrodes form two pre-focus lenses and a final accelerating electrode positioned adjacent to the fourth focus electrode forms a main focus lens. The first pre-focus lens is synchronous with a deflection signal. Variation of the focussing intensity of the main focus lens is compensated for by the first pre-focus lens.

Abstract: In an electron gun for cathode ray tubes in which the second of three focusing electrodes is divided into first, second, and third auxiliary electrodes, applying a first dynamic voltage synchronous with vertical and horizontal deflection signals to the first and third auxiliary electrodes, a second dynamic voltage synchronous with the deflection signals to the second auxiliary electrode, and a static focusing voltage higher than the maximum of the first and second dynamic voltages to the first and third focusing electrodes. The electron gun uses two dynamic focusing voltages in a low voltage driving method for low dynamic focusing voltages, thereby greatly reducing the possibility of an arc discharge between electrodes and compensating for astigmatism of the electron beam due to the non-uniform magnetic field of the deflection yoke. A sharp picture is achieved by improving the focusing of the electron beam.

Abstract: An electron gun for a cathode ray tube includes a cathode, control grid, a screen grid, and an opposed anode and focus electrode for controlling and accelerating a plurality of electron beams, the anode and the focus electrode including recesses containing aligned central beam passing holes and pairs of peripheral beam passing holes on opposite sides of the central beam passing holes. The peripheral beam passing holes are intersected by planes of the recesses that are inclined relative to the electron beam passing direction.

Abstract: A dynamic focusing electron gun for high resolution includes a triode part and a main lens. The main lens includes a first focusing electrode disposed proximate the triode part, a second focusing electrode disposed proximate an anode electrode, a static potential electrode and a dynamic potential electrode disposed between the first and second focusing electrodes to form a dynamic quadrupole lens. The dynamic focusing electron gun produces a high resolution image with a small radius beam spot with low astigmatism, low spherical aberration, and good voltage endurance characteristics.