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A luminescent display cell comprising a glass envelope having a front panel, a side wall, and a rear plate. Plural luminescent display segments are formed on the front panel of the glass envelope, the display segments being supplied with an anode voltage. Plural cathodes are arranged on the rear pan

A luminescent display cell comprising a glass envelope having a front panel, a side wall, and a rear plate. Plural luminescent display segments are formed on the front panel of the glass envelope, the display segments being supplied with an anode voltage. Plural cathodes are arranged on the rear panel side of the glass envelope in corresponding relation to the display segments. Plural control grid electrodes are arranged between the display segments and the cathodes in corresponding relation to the display segments. A common accelerating electrode is disposed between the display segments and the control grid electrodes. The voltage applied to each control grid electrode is controllable for electron emission from the cathodes so as to render each display segment corresponding to each control grid electrode selectively luminous for display. Furthermore, a separator surrounds each display segment and it is supplied with the above anode voltage so that diffusion lens is formed which allows the electron beam from the cathode to be spread laterally and radiated to the entire surface of the display segment to be rendered luminous.

대표청구항 ▼

A luminescent display device, comprising: a glass envelope having front panel, side wall and rear plate; a plurality of luminescent segments formed on an inner surface of the front panel with a conductive layer coated thereon and positioned to form red, green, and blue displays in a line; a separato

A luminescent display device, comprising: a glass envelope having front panel, side wall and rear plate; a plurality of luminescent segments formed on an inner surface of the front panel with a conductive layer coated thereon and positioned to form red, green, and blue displays in a line; a separator electrode formed of partitions extending from said front panel inner surface towards said rear plate and forming a frame around each segment; a respective cathode adjacent to the rear panel for each of the luminescent segments; a respective control grid electrode arranged between a respective segment and a respective cathode for each respective cathode and segment; a common accelerating electrode arranged between said segments and said control grid electrodes; and the control grid electrodes, common accelerating electrode, luminescent segment, and cathodes being positioned and dimensioned such that with an anode voltage applied to the separator electrode and said segments, a voltage applied to the accelerating electrode, and a voltage selectively applied to one or more of said control grid electrodes, electron emission from the respective cathodes is controlled so that the respective segment is selectively luminescent for display.