| 摘要 |
<p>A flat cathode ray display tube has an envelope (12) divided into front and rear portions by a partition (20) carrying frame deflection electrodes (42) with an electron gun (30) and line scanning deflector (34) positioned in the rear portion, the electron beam (32) being directed initially parallel to a flat faceplate (14) of the envelope, turned through 180° by a reversing lens (36) into the front portion and then deflected by electrodes (42) towards a screen (16) on the faceplate. In addition to the electrodes (42), the components (30), (34) and (36) are all also mounted on the partition forming a sub-assembly whereby correct mutual positioning is ensured and assembly facilited. A spacing structure (55, 58) accurately spaces the sub-assembly from the faceplate and supports also an electron multiplier (44) for beam current amplification. Respective elements of the partition and spacing structure engage each other and envelope side walls for location purposes.</p> |
