• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1479038 Luminescent screens R C A CORPORATION 22 Aug 1974 [4 Sept 1973] 36947/74 Heading H1D [Also in Division C4] An image display device comprises a luminescent viewing screen comprising phosphor particles with colour filter particles adhered thereto and partially covering the surfaces of the phosphor particles, the phosphor particles being emissive of light in a particular portion of the visible spectrum and the filter particles being preferentially transmissive of light in that spectrum portion. The device may be a colour shadow mask or monochrome C.R.T. or photoluminescent or electroluminescent screen. The arrangement enables transmission and variations of transmission, absorption and reflection of light of different portions of the visible spectrum to optimize brightness and contrast. The red emitting target elements R1 may be principally Eu activated yttrium oxysulfide with red transmitting filter particles 57 of cobalt aluminate of 0À1 to 0À5 Á average size, blue emitting elements B of Ag activated ZnS with blue filter particles of a cobalt aluminate of 0À1 to 0À5 Á average size, and uncoated green emitting elements of Cu activated ZnCdS all backed by reflecting layer 33. The elements may be circular in hexagonal interfaced array. Elements R1 are loosely packed 1 to 4 particles thick and emit red light with possibly some other spectral components some of which are absorbed by particles 51 which also absorb light from ambient sources, the blue elements having analogous characteristics. Other red phosphors may be Mn : Zinc orthosphosphate; Ag : ZnCdS; Eu : yttrium vanadate and Eu : yttrium oxide. Red filters may also be ruby, red tinted silicate glasses and red ceramic pigments. Blue phosphors may be Ti : calciummagnesium silicate and Tb : yttrium oxysulfide, and blue filters may be ultramarine blue tinted silicate glasses and blue ceramic pigments. Green phosphors may be willemite, Mn : zinc aluminate and Ag : ZnCdS and green filter material may be Cr 2 O 3 , mixtures of yellow cadmium sulfoselenide and blue green cobalt aluminates, green tinted silicate glasses and green ceramic pigments. In Fig. 5, additional R3 and B3 elements are free of filter particles since they may here reduce brightness and are unlikely to absorb ambient light. In Fig. 2, G1 elements may include filter particle coatings and may be of the double layer form. Coating procedure is detailed using gelatine absorptive films and filter particle suspensions. Phosphor and filter particle sizes are exemplified. Reference is made to U.S.A. Specification 3,275,466.
    公开号:SU1409140A3
    申请号:SU742048237
    申请日:1974-08-02
    公开日:1988-07-07
    发明作者:Алан Липп Стевен
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

    J

    about
    The invention relates to electronic technology and can be used in the development of devices for reproducing images for electron-beam devices used in various fields of technology.
    The purpose of the invention is to increase the image brightness, which is achieved by using a partial coating of the phosphor particles in the screen with particles of the light filter.
    FIG. 1 shows a diagram of a luminescent screen for reproducing an image with a single luminophore layer; in fig. 2 is a diagram of a screen with double-1 phosphor layers; in fig. 3 - phosphor particles coated with particles of a light filter.
    The luminescent screen (Figs. 1 and 3), which is part of an image reproducing device, contains an evacuated flask placed in non-luminous exciters of the screen, such as electron guns, and means of controlling these pathogens, such as means of deflecting electron beams, from bottom 1 The flask, on the inner surface of which (opposite to the viewing surface of the screen), is a layer of blue phosphor 2 glowed, covered with a layer 3 of metal coating. On the blue phosphor layer of the luminescent color, a phosphor layer 4 with a luminescence color different from blue may be located (Fig. 2). The blue phosphor layer of the luminescent color is made of individual particles 5 of the phosphor, partially covered with particles 6 of the light filter, which transmits blue color.
    The particle size 5 of the blue phosphor luminescence is 7 µm, and the particle filter is -0.1 µm, while the average degree of coating of the surface of the phosphor particles with particles of the light filter is 50%.
    The phosphor particles 5 can be made of zinc activated by silver, and the light filter particles 6 can be made of cobalt aluminate.
    If there is a second layer 4 of phosphor, it is located at a greater distance from the inner surface of the bottom 1 than the first layer 2 of phosphor.
    The device works as follows.
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    five
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    When the luminescent screen luminescent pathogens are turned on, for example, in the form of electron generators, the electron beam hits the screen surface coated with the phosphor and causes its corresponding parts to glow. This glow can be observed on the external (viewing) surface of the screen. Increasing the image brightness is achieved due to the fact that the viewing surface of the screen is separated from the particles of the phosphor not by a continuous layer of light filter particles, as in known devices, but by a rarefied layer. Experiments and trials have shown that by complying with the indicated requirements for the size of the filter particle and the phosphor particles, a sufficiently high image contrast is achieved.
    For a two-layer phosphor, all other conditions being equal, the brightness of the image is provided, since the first phosphor layer serves for the second layer with a light filter of a lower optical density than with a continuous layer of the light filter between the first layer and the screen.
    By such a cut, the implementation of the proposed invention makes it possible to increase the brightness of the device for reproducing an image.
    权利要求:
    Claims (2)
    [1]
    1. A device for reproducing an image containing a luminescent-screen, the surface of which on the side opposite to the viewing screen is covered with a layer of phosphor particles of a certain color of luminescence, each of which is covered with adhesive particles adhering to it. a filter that transmits optical radiation in the wavelength range corresponding to the luminescence color of the phosphor particles, and luminescence pathogens of the phosphor particles, characterized in that, in order to increase the image brightness, the phosphor particles are made of a luminescent material with a blue luminescence color of 7 µm, and The particles of the filter have a diameter of about 1 micron, while the average degree of coating of the particles of phosphor with particles of the filter is 50%.
    [2]
    2. The device according to claim 1, about tl and - often with the fact that it is made with a second layer of phosphor particles located on the same side as the layer of blue phosphor glow, at a greater distance from - iuTpoy screen surface while the phosphor particles of the second layer are made of a material with a different luminescence color from blue.
    FIG.
    fig.Z
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1409140A3|1988-07-07|Image display apparatus
    US3114065A|1963-12-10|Color image reproducer
    US2435436A|1948-02-03|Cathode-ray tube screen
    US4245242A|1981-01-13|Contrast enhancement of multicolor displays
    US2243828A|1941-05-27|Luminescent screen
    KR900002388A|1990-02-28|Projection tv display tube
    US3873868A|1975-03-25|Display tube with color selective filtration
    CN1591165A|2005-03-09|Colour projecting display
    US2419177A|1947-04-15|Cathode-ray tube coating
    US2418780A|1947-04-08|Alkali halide target with contrasting colors
    US3522463A|1970-08-04|Electron tube multicolor dual persistence screen comprising phosphorcoated phosphor particles
    US2418779A|1947-04-08|Alkali metal halide and luminescent screens of substantially coincident spectral absorption
    Larach et al.1973|Cathode-ray-tube phosphors: principles and applications
    US3360674A|1967-12-26|Europium and bismuth activated yttrium vanadate phosphor
    US3382393A|1968-05-07|Color television tube with faceplate panel of high transmittance in the red color
    US3946267A|1976-03-23|Plural filter system cooperating with cathode ray display with lanthanum host phosphor emissive in two colors
    US2802753A|1957-08-13|Tri-color kinescope screen
    EP0739027B1|2002-07-03|Fluorescent film structure of color Braun tube
    US2915661A|1959-12-01|Color television screen
    US3858081A|1974-12-31|Cathode ray tube screen structure utilizing adjuvant excitation
    US3721849A|1973-03-20|Dual persistence screen for a cathode ray tube
    US4242371A|1980-12-30|High-luminance color screen for cathode-ray tubes and the method for manufacturing the same
    US4495085A|1985-01-22|Phosphor
    EP0114436B1|1987-03-18|Green luminescing cathode-ray tube device
    JP3168733B2|2001-05-21|Phosphor screen of color cathode ray tube
    同族专利:
    公开号 | 公开日
    NL184590C|1989-09-01|
    FR2246055A1|1975-04-25|
    CA1011798A|1977-06-07|
    US3886394A|1975-05-27|
    USRE30015E|1979-05-29|
    JPS5733660B2|1982-07-19|
    DE2442167A1|1975-03-06|
    NL7411425A|1975-03-06|
    IT1017161B|1977-07-20|
    BR7407220D0|1975-07-01|
    BE819351A|1974-12-16|
    FR2246055B1|1978-02-17|
    GB1479038A|1977-07-06|
    NL184590B|1989-04-03|
    DE2442167C2|1983-03-10|
    AU7285474A|1976-03-04|
    JPS5056146A|1975-05-16|
    引用文献:
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    US4020231A|1976-03-31|1977-04-26|Gte Sylvania Incorporated|Pigmented phosphors and method of making|
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    JPS5736706B2|1976-07-02|1982-08-05|
    JPS5328372A|1976-08-30|1978-03-16|Toshiba Corp|Col or picture tube of light absorption stripe screen type|
    JPS5334459A|1976-09-10|1978-03-31|Mitsubishi Electric Corp|Color cathode ray tube|
    JPS5721228B2|1976-10-21|1982-05-06|
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    JPS6252421B2|1976-12-20|1987-11-05|Kasei Optonix|
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    DE2731826C2|1977-07-14|1987-10-01|Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De|
    US4152483A|1977-11-18|1979-05-01|Dai Nippon Toryo Co., Ltd.|Pigment coated phosphor and process for manufacturing the same|
    US4307320B1|1978-02-03|1993-12-28|Kasei Optonix, Ltd.|Pigment coated phosphor and high contrast color television cathode ray tube using same|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US394094A|US3886394A|1973-09-04|1973-09-04|Image display employing filter coated phosphor particles|
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