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    • 53. 发明授权
    • Image-forming apparatus having vent tubes
    • 具有放气管的图像形成装置
    • US5952775A
    • 1999-09-14
    • US479372
    • 1995-06-07
    • Yasue SatoShinichi KawateKazuyuki Ueda
    • Yasue SatoShinichi KawateKazuyuki Ueda
    • H01J9/18H01J9/24H01J9/385H01J29/02H01J29/08H01J29/86H01J29/87H01J31/08H01J31/12H01J28/70
    • H01J9/242H01J29/028H01J29/864H01J31/127H01J9/385H01J2329/8625
    • An image-forming apparatus has a rear plate including electron-emitting devices formed thereon, a face plate including a fluorescent film formed thereon and being disposed to face the rear plate, flat plate spacers disposed between the rear plate and the face plate, and an outer frame surrounding peripheral edges of the rear plate and the face plate. Electrons emitted from the electron-emitting devices are irradiated to the fluorescent film to thereby display an image under condition where an inner space of a container constructed by the rear plate, the face plate and the outer frame is evacuated through a vent tube into a depressurized state. The vent tube is attached to a side of the outer frame that is positioned across an imaginary extension of the flat-plate spacer in the longitudinal direction thereof, or to the face plate or the rear plate in the vicinity of that side of the outer frame. With such arrangements, evacuation conductance is increased to reduce an evacuation time, and a higher vacuum level is achieved in the container so that an image can be stably displayed for a long time.
    • 图像形成装置具有包括形成在其上的电子发射器件的后板,包括形成在其上并设置成面向后板的荧光膜的面板,设置在后板和面板之间的平板间隔件, 外框围绕后板和面板的周边边缘。 从电子发射器件发射的电子被照射到荧光膜上,从而在由后板,面板和外框架构成的容器的内部空间通过排气管排出到减压的状态下显示图像 州。 排气管附接到外框架的横向于平板隔离件的纵向方向的假想延伸部分的侧面,或者连接到外框架的该侧附近的面板或后板 。 通过这样的布置,提高排气电导以减少排气时间,并且在容器中实现更高的真空度,使得图像可以长时间稳定地显示。