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    FLAT DISPLAY SCREEN ANODE HAVING PROTECTIVE RING
    1.
    发明专利
    FLAT DISPLAY SCREEN ANODE HAVING PROTECTIVE RING 失效

    公开(公告)号：JPH1097835A

    公开(公告)日：1998-04-14

    申请号：JP13055397

    申请日：1997-05-06

    Applicant: PIXTECH SA

    Inventor： MOUGIN STEPHANE ,  COURREGES FRANCIS ,  BANCAL BERNARD ,  RIVIERE CAZAUX LIONEL

    IPC: H01J31/12 ,  G09F9/30 ,  H01J29/08 ,  H01J29/28 ,  H01J31/15

    Abstract: PROBLEM TO BE SOLVED: To eliminate any spark taking place on a screen peripheral edge by surrounding an active range by means of one track for collecting the re- discharged secondary electrons and separating the active range from the peripheral edge of the active range by means of an interval within the insulating material of the track. SOLUTION: An insulation interval 22 must be made sufficiently large for avoiding any electric arc taking place between an active range 20 and a collective link 21. However, the interval 22 is made as narrow as possible so as to avoid any expansion of a positive electric load range within this interval. The width of the interval 22 is made smaller than the average distance liable to be progressed by those secondary electrons discharged from the surface of this interval, with provision of allowance by a bias voltage. Thereby, the entire secondary electrons re-discharged from the insulating material 22 are collected by material 21. Accordingly, such a phenomenon as propagation of the secondary electrons to a sealed joint between an anode and a cathode. Furthermore, by having the ring 21 biased, the corresponding electric load can be eliminated.

    ION PUMPING OF FLAT MICROCHIP SCREEN
    2.
    发明专利
    ION PUMPING OF FLAT MICROCHIP SCREEN 失效

    公开(公告)号：JPH1125889A

    公开(公告)日：1999-01-29

    申请号：JP19360298

    申请日：1998-06-25

    Applicant: PIXTECH SA

    Inventor： MOUGIN STEPHANE ,  RIVIERE CAZAUX LIONEL

    IPC: H01J9/44 ,  H01J7/16 ,  H01J9/39 ,  H01J29/04 ,  H01J29/18 ,  H01J29/94 ,  H01J31/12

    Abstract: PROBLEM TO BE SOLVED: To prevent the decrease of the emission rate of a microchip by ion pumping by providing on a cathode side, a sacrificial region of an electron- emitting microchip which is addressable independently from an active region. SOLUTION: A cathode 1 is placed opposite to an anode for cathode emission, and an electron-emitting microchip 2 is deposited on a cathode conductor 7 formed in plural line. A main grid 3 is made by an electroconductive layer formed in a line perpendicular to a cathode conductor row. The cathode 1 contains a sacrificial microchip 2' in a sacrificial region, individually addressable from a line 7 by using an additional electrode 7'. This region is engaged with a sub-grid 3' individually addressable from the line of the main grid 3. In order to improve the degree of vacuum in a space 11 between electrodes, the sacrificial microchip 2' is addressed when a screen is completed, and ion pumping is carried out. It is preferable to repeat this process, even after using the screen to regenerate the vacuum for next usage.

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