| 摘要 |
<p>The thin-type display device (1) with a vacuum envelope comprises a transparent front wall (3), which is provided with a display screen, and at least an electron source (5) and a duct structure, which cooperates with said electron source (5) and which extends substantially parallel to the front wall (3). Ducts (6, 6', 6'') of the duct structure serve as electron-propagation means and are provided with walls (11, 11', 11'') of an electrically insulating material having a secondary emission coefficient which is suitable for electron propagation. The display device (1) is characterized in that 1 ≤ s/w ≤ 5 and s.w ≥ 5 mm2, where s is the depth of the ducts (6, 6', 6'') and w is the width of the ducts (6, 6', 6''). Preferably, the width w ≥ 1.5 mm and the depth 3.5 ≤ s ≤ 15 mm. The voltage difference over the length of the ducts (6, 6', 6''), measured parallel to the front wall (3), is less than 75 V/cm, preferably less than 40 V/cm.</p> |
