摘要:
An electron gun for emitting an electron beam to a phosphor screen and for scanning one of two scanning regions defined in the phosphor screen is arranged in two necks of a vacuum envelope. A mask body of a shadow mask has two effective areas, in which numerous electron beam passage apertures are bored, defined in association with the scanning regions, and has a boundary portion defined between the effective areas and opposed to the boundary between the scanning regions of the phosphor screen. An adjustment member used to adjust a q value at a plurality of points on the boundary portion is fixed to the inner surface of the boundary portion. After the q value is adjusted, the adjustment member is fixed to the mask frame.
摘要:
A color cathode-ray tube comprises an envelope having rectangular flat face and rear plates opposing each other. A phosphor screen is formed on an inner surface of the face plate. Mask support members are mounted on an inner surface of the rear plate. A shadow mask is arranged in the envelope and supported by the mask support members to face the phosphor screen at a predetermined distance. A plurality of positioning posts are fixed on the inner surface of the rear plate and extend toward the face plate. A plurality of positioning pins extend from the inner surface of the face plate and engage the positioning posts so as to position the face plate at a predetermined position with respect to the rear plate. The shadow mask has setting openings through which the positioning posts extend so as to position the shadow mask at a predetermined position with respect to the rear plate.
摘要:
A color cathode-ray tube with a vacuum envelope that includes a rectangular, flat face plate and a rectangular, flat rear plate opposing the face plate. A phosphor screen is formed on an inner surface of the face plate, and fixing members are fixed to an inner surface of the rear plate. A shadow mask arranged in the envelope is supported by mask support members to face the phosphor screen at a predetermined distance. Plate support members are arranged in the envelope to support a load of atmospheric pressure acting on the face plate and the rear plate. The mask support members and the plate support members are fixed to the fixing members while being in close contact with the inner surface of the rear plate.
摘要:
A color cathode-ray tube comprises an envelope having rectangular flat face and rear plates opposing each other. A phosphor screen is formed on an inner surface of the face plate. Mask support members are mounted on an inner surface of the rear plate. A shadow mask is arranged in the envelope and supported by the mask support members to face the phosphor screen at a predetermined distance. A plurality of positioning posts are fixed on the inner surface of the rear plate and extend toward the face plate. A plurality of positioning pins extend from the inner surface of the face plate and engage the positioning posts so as to position the face plate at a predetermined position with respect to the rear plate. The shadow mask has setting openings through which the positioning posts extend so as to position the shadow mask at a predetermined position with respect to the rear plate.
摘要:
Provided is an image display apparatus including: a vacuum container having an electron source enclosed therein for displaying an image; an ion pump communicating with the vacuum container for discharging air therefrom and decreasing pressure therein; and a resistor connected in series with the ion pump with respect to a power supply for driving the ion pump. Even if internal resistance of the ion pump undergoes order-of-magnitude changes according to its operating state, current consumption can be suppressed and the ion pump can be driven efficiently.
摘要:
In an image display apparatus composed of a vacuum container having an electron source composed of multiple electron-emitting devices and a phosphor film that is irradiated with an electron from the electron source to emit light for display, an ion pump for exhausting the vacuum container through a communicating path by virtue of an action of a magnetism forming portion is arranged. A magnetic shielding member is arranged in a space where the ion pump and the electron-emitting devices are in communication with each other, whereby an influence of a magnetic field generated by the magnetism forming portion on the trajectory of an electron emitted from any one of the electron-emitting devices and display luminance unevenness incidental to the influence are removed.
摘要:
A color cathode ray tube comprises a vacuum envelope including a substantially rectangular faceplate having a first axis and a second axis perpendicular to the first axis and a plurality of necks opposing to the faceplate. A plurality of electron gun assemblies are received in the necks respectively. A phosphor screen is formed on the inner surface of the faceplate and includes a plurality of continuous segment regions scanned with electron beams emitted from corresponding ones of the assemblies. The mask member is received in the vacuum envelope and has a plurality of effective regions through which the electron beam pass. A plurality of effective regions are formed into a plurality of groups.
摘要:
A cathode-ray tube includes an envelope having a rectangular face plate and a rectangular, flat rear plate opposed to the face plate. A phosphor screen is formed on the inner surface of the face plate and has a number striped phosphor layers extending in parallel to one another, and a plurality of regions which are independently scanned by electron beams. A mask support mechanism for supporting a shadow mask in the envelope comprises first mask support members fixed to the inner surface of the rear plate and situated to face first longitudinal ends of the phosphor layers, second mask support members fixed to the inner surface of the rear plate and situated to face second longitudinal ends of the phosphor layers, and central mask support members fixed to the inner surface of the rear plate and situated between the first and second support portions. The shadow mask is supported on the mask support members while being applied with a tensile force in the longitudinal direction of the phosphor layers.
摘要:
Provided is an image display apparatus, including: a vacuum container which includes an electron source and an anode electrode opposed to the electron source; and an ion pump arranged so as to communicate through the vacuum container, in which: an ion pump container is composed of a non-electroconductive material; and an electroconductive film is formed on an external surface of the vacuum container on a side on which the ion pump container is mounted or on an internal surface of the ion pump container. The image display apparatus achieves: a reduction in weight of the ion pump; an improvement in compatibility to the vacuum container; and the prevention of an adverse effect of discharge inside the ion pump on image display.
摘要:
In an image display apparatus composed of a vacuum container having an electron source composed of multiple electron-emitting devices and a phosphor film that is irradiated with an electron from the electron source to emit light for display, an ion pump for exhausting the vacuum container through a communicating path by virtue of an action of a magnetism forming portion is arranged. A magnetic shielding member is arranged in a space where the ion pump and the electron-emitting devices are in communication with each other, whereby an influence of a magnetic field generated by the magnetism forming portion on the trajectory of an electron emitted from any one of the electron-emitting devices and display luminance unevenness incidental to the influence are removed.