Flat configuration image display apparatus and manufacturing method thereof

In a flat panel color display apparatus including an array of cold cathodes, a first set of stripe shaped base electrodes oriented in a first direction for receiving an image signal, a second set of stripe shaped gate electrodes oriented in a second direction orthogonal to said first direction for receiving a line selection pulse, wherein cold cathodes adjacent an orthogonal intersection of gate and base electrodes emit an electron beam towards a fluorescent film upon simultaneous reception of said selection pulse and said image signal by the gate and base electrodes at said orthogonal intersection, said fluorescent film divided into groups of stripes including a plurality of stripes for pixels of the display, said base electrodes arranged in groups corresponding to said groups of stripes for causing said cold cathodes to emit electrons towards fluorescent stripes responsive to image signals representing specified color information, the improvement comprising:

• a structure for increasing duty cycle of a display element, wherein:
• each of said base electrodes includes a plurality of n electrically isolated segments wherein n is an integer greater than 2,
• said gate electrodes are divided to n interspersed groups, and including
• a plurality of n buses each respectively connected to one of said n groups of gate electrodes,
• thereby enabling each of said segments of said base electrodes to cause said cold cathodes to emit electrons with an increased duty cycle.

A flat configuration image display apparatus comprising electron beam generation means having cold cathodes for generating a plurality of electron beams in response to an image signal fed from an image signal supply circuit;

• electron beam control electrode means for selectively energizing said cold cathodes of said electron beam generation means in accordance with a scanning line selection signal from a selection signal generation circuit;
• electron beam extraction means for extracting the plurality of electron beams from said electron beam generation means;
• focusing electrode means for focusing the electron beams extracted by said electron beam extraction means;
• and fluorescent film means having a fluorescent surface which radiates for display of an image on a screen of said image display apparatus in response to the plurality of electron beams focused by said focusing electrode means.