Abstract:
In an electron tube based on a cold cathode, a cesium source (17) containing Csx-Auy or Csx-Sby is provided near the cold cathode (7), preferably in contact with the first grid (9). Cesium is introduced into the source during activation of the tube. The vapor pressure of the cesium compounds is such that proper delivery of cesium is guaranteed throughout the life-time of the cathode.
Abstract:
Cathode ray tube comprising an electron gun which is constructed in such a way that the gas pressure near the electron-emissive layer (30) of the cathode is lower than in the other parts of the tube. This can be achieved by reducing the aperture between the G1 (33) and G2 (36), by providing the G2 (36) with a skirt (43). The wall of the skirt, the G1 and the G2 may also be at least partly coated with a getter (41).
Abstract:
캐소드의전자방사층(30) 근방의가스압력이음극선관의다른부분들에서보다더 낮은방식으로구성되는전자총을구비한음극선관이다. 이것은스커트(43)를가진 G2(36)를제공함으로써 G1(33) 및 G2(36)간의개구를감소시켜달성될수 있다. 스커트의벽, G1 및 G2 역시게터(41)로적어도부분적으로피복된다.
Abstract:
Cathode ray tube comprising an electron gun which is constructed in such a way that the gas pressure near the electron-emissive layer (30) of the cathode is lower than in the other parts of the tube. This can be achieved by reducing the aperture between the G1 (33) and G2 (36), by providing the G2 (36) with a skirt (43). The wall of the skirt, the G1 and the G2 may also be at least partly coated with a getter (41).
Abstract:
Electron-optical device having two elongate emitting regions arranged symmetrically with respect to a longitudinal axis for producing two electron beams having an elongate cross section. By means of electron grids, the two beams are focused at the same point of an electron target arranged transversely to the longitudinal axis and having a short central axis and a long central axis. The elongate emitting regions have their smallest cross section parallel to the scanning direction of a device, cooperating with the electron-optical device, for scanning a target arranged transversely to the longitudinal axis.
Abstract:
Electron-optical device having an electron-emitting region, a longitudinal axis and an arrangement of apertured electron grids along the axis. The first grid has an aperture for passing electrons, which aperture is located further outwards with respect to the longitudinal axis than the emitting region. One of the further grids is provided with a shield so as to shield the edge wall of the aperture, if it is located within direct view of the electron-emitting region, from incidence of positive ions.
Abstract:
Electron-optical device having two elongate emitting regions arranged symmetrically with respect to a longitudinal axis for producing two electron beams having an elongate cross section. By means of electron grids, the two beams are focused at the same point of an electron target arranged transversely to the longitudinal axis and having a short central axis and a long central axis. The elongate emitting regions have their smallest cross section parallel to the scanning direction of a device, cooperating with the electron-optical device, for scanning a target arranged transversely to the longitudinal axis.
Abstract:
Invention subject is a thin type image display device for displaying an image by emitting light from a fluorescer with irradiation of electron beams thereto. The device has a cathode panel (3) between a front panel (1) and a back panel (2) in such a manner that a space (4) exist between the cathode panel (3) and the back panel (2), wherein through holes (10) for diffusion of getters are formed in the cathode panel (3) to maintain the image quality at the center of a display screen, or the cathode panel (3) is supported by getters to maintain a required pressure, hence attaining a higher image quality even on a large-sized display screen. A gate electrode (6) may be composed of a getter material.