| 摘要 |
PURPOSE:To improve the sensitivity and the linearity of deflection by using horizontally deflecting electrodes each consisting of pairs of facing electrodes and gradually varying the distance between the pair of facing electrodes. CONSTITUTION:A planar cathode-ray tube is assembled by placing a vertically scanning electrode 12, a linear cathode 10, a first to a fourth grid electrode 13-16, vertically deflecting electrodes 17 and 18, horizontally deflecting electrodes 53 and a fluorescent screen 27 in that order. Each of the horizontally deflecting electrodes 53 consists of opposite electrodes 50 located at a distance of D1, opposite electrodes 51 located at a distance of D2 and opposite electrodes 53 located at a distance of D3 (D1<D2<D3). The lengths (l1-l3) of the electrodes (D1-D3) are either approximately equal to or smaller than D3. As a result, the sensitivity of deflection is increased by making the deflecting electrode for a smaller deflection closer to the electron beam. Furthermore, the lineality of deflection is improved by making the lengths of the electrodes almost equal to the electrode distance, thereby increasing the performance of a thin-type cathoderay tube. |
