摘要:
A polychromatic cathode ray tube includes a screen formed by a single layer of crystalline semi-conductor material which luminesces in visible light when excited by an electron beam. The color of luminescence is varied by modulating the heat energy imparted to the layer by the electron beam.
摘要:
There is provided an apparatus for erasing noise in a stimulable phosphor sheet used for a radiation image recording and reproducing system in which a radiation image is once recorded on the phosphor sheet and then read out and reproduced to a visible image. The apparatus comprises an erasing light source (18) emitting light of wavelength mainly within the range of 400nm to 600nm, a loader for carrying the phosphor sheet to a position at which the phosphor sheet faces the erasing light source (18), a holder for holding the phosphor sheet in said position, and an unloader for carrying the phosphor sheet out of said position. The erasing light source (18) may be a fluorescent lamp, a laser source, an Na lamp, and Ne lamp, a metal halide lamp or an Xe lamp. The erasing light source (18) preferably comprises a plurality of aperture type white fluorescent lamps positioned parallel with one another along an inclined plane with the phosphor sheet during the noise erasing step being moved upwards along a direction parallel to the said inclined plane.
摘要:
A novel type projection TV has a large size fluorescent screen (2) bearing three kinds of dots or stripes of fluorescent material which emits visible lights of red, green and blue at excitation by UV-rays, which are emitted from UV-emitting CRTs' (3) for red, green and blue pixel of image, respectively; and a mask having UV-light passing apertures or a lens array is disposed on light paths of the UV-rays to improve color purity.
摘要:
A novel type projection TV has a large size fluorescent screen (2) bearing three kinds of dots or stripes of fluorescent material which emits visible lights of red, green and blue at excitation by UV-rays, which are emitted from UV-emitting CRTs' (3) for red, green and blue pixel of image, respectively; and a mask having UV-light passing apertures or a lens array is disposed on light paths of the UV-rays to improve color purity.
摘要:
A polychromatic cathode ray tube includes a screen formed by a single layer of crystalline semi-conductor material which luminesces in visible light when excited by an electron beam. The color of luminescence is varied by modulating the heat energy imparted to the layer by the electron beam.
摘要:
Afin d'obtenir un effet de mémoire dans les tubes intensificateurs d'images (10), l'invention prévoit de munir ces tubes d'un écran de sortie (22) constitué par une cellule électroluminescente possédant la propriété d'émettre une lumière visible lorsqu'une tension électrique est créée entre ses faces, et douée d'hystérésis, ledit écran permettant, sous l'action d'une tension appliquée (source S), de conserver l'image adressée par le faisceau d'électrons et de la faire réapparaître à l'instant choisi, pour une durée déterminée. Application à la radiologie.
摘要:
This invention relates to a fluorescent screen structure wherein a plurality of first electrodes (for example stripelike selected electrodes) having a plurality of fluorescent substances (especially fluorescent substances of different colors for a color screen) severally deposited thereon and second electrodes (for example stripelike reverse bias electrodes not for electrodeposition) not having the fluorescent substances deposited thereon between these first electrodes are provided on a common base (especially a glass substrate for a fluorescent screen panel) and a field emission display (FED) using this and methods for manufacturing these. According to the invention, even in such cases as when pillars for supporting a high vacuum are formed in an FED, a uniform fluorescent screen can be obtained without the pillars constituting an obstruction and a fluorescent substance can be deposited in such a way that it will not subsequently impair the level of a vacuum in a display in which the fluorescent screen is used and also a fluorescent substance can be deposited in a pattern such as a narrow stripe pattern having fine widths and fine pitches highly precisely and without mixed colors and with good manufacturability.