| 摘要 |
A display device comprises a face plate assembly, a segmented cathode subsystem having a segmented backing electrode and an emitter array, an accelerator, and first and second grid elements. The face plate assembly has an electrically positive receptor that causes an image to be displayed as a result of electron impingement thereon. Active segments of the segmented backing electrode and the emitter array establishing a uniform space-charge cloud of free electrons functioning as a proximity virtual cathode. The segmented backing electrode has segments and a controller to activate the segments individually. The accelerator located a first distance from the electron emitter array creating at least one virtual cathode remotely located a second distance from the accelerator. The first and second grid elements are located between the face plate assembly and the at least one remotely located virtual cathode to select electrons from the remotely located virtual cathode to impinge the electrically positive receptor. |
