Patent ID: 6853148
Filing Date: 2005-02-08
Classification: H01J

Abstract:
1. A method of driving an image-forming apparatus comprising a vacuum container constituted by disposing in opposition to each other a rear plate provided with an electron source formed thereon, and a face plate having an image display region provided with at least phosphors for being irradiated with electrons emitted from the electron source to form an image, and an anode disposed on the phosphors, an electroconductive member is provided at a site outside of the image display region on an inner surface of the face plate, and first and second resistant members having resistances higher than that of the anode and having different resistances from each other, are electrically connected between the anode and the electroconductive member, and the anode, the first resistant member, the second resistant member, and the electroconductive member are electrically connected in series, the method comprising the steps of determining a voltage of the anode and the electroconductive member, so that a voltage of the anode is higher than a voltage of the electroconductive member, thereby setting at a normal state voltages applied to the first and second resistant members, changing from the normal state the voltage applied to at least one of the first and second resistant members, and returning to the normal state the voltage changed in the changing and applied to the at least one of the first and second resistant members.