| 摘要 |
PURPOSE:To obtain a cathode ray tube which always maintains a clean face by depositing transparent conductive film on the face and grounding it. CONSTITUTION:A phosphor film 3 is deposited on the internal surface of glass bulb 2 of the cathode ray tube 1, a transparent conductive film 4 consisting of SnO2 and In2O3 is deposited on the face and the conductive film 4 is grounded when the cathode ray tube 1 is mounted on the chassis. The conductive film 4 is deposited by the means such as heated spray, vacuum deposition, sputtering or immersion. Thereby, charging on the face of cathode ray tube can be eliminated and contamination of face surface can also be eliminated. Thus, cleaning work becomes unnecessary and high grade picture quality can always be assured. |
