| 摘要 |
<p>PURPOSE:To prevent any damage to a linear cathode electrode from occurring by installing a supporting device which comes into contact with the linear cathode electrode at plural numbers of spots, and forming a buffer layer in a contact part of this supporting device. CONSTITUTION:A linear cathode electrodes 5 raises its temperature due to current-energization and emits an electron 9. In this electrode 5, heating and cooling are repeated in accordance with operation and stoppage of a display unit, and it repeats its expansion and contraction in a state of being contacted with a supporting device 6. However, since the electrode 5 is supported by the supporting device 6 via a soft buffer layer 7, an electron emissive material layer 5a formed on the surface is in no case damaged. And, even if the electrode 5 vibrates, the amplitude is held down to very slightness so that there is no variation in an electron beam takeoff quantity attributable to the vibration.</p> |
