| 摘要 |
<p>PROBLEM TO BE SOLVED: To precisely control luminance and to allow a high grade image display having no uneven emission by arranging constant-current control circuit to the both of a cathode electrode and a leader electrode to control so that differential current value will be constant. SOLUTION: There are at least provided with a cathode electrode 2, an electron emission device 3 mounted on the electrode 2, an anode electrode 1 arranged facing to the device 3, a leader electrode 4 arranged between the electrodes 1, 2 and constant-current circuits 8, 9 connected to the electrode 4, 2 respectively. The difference in current between the electrodes 2, 4 will be made constant.</p> |
