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平板电视的主要问题是要有一种平板显示器件。目前研制出的新型平板显示器件有场致发光板、液晶显示装置以及气体放电(等离子)板等等,并已获得实际应用,但作电视显示,其性能仍然赶不上现有的显象管。表1列出了它们与现有显象管和本文将要叙述的最新平板显象管(束导向等)的比较。由表看出:交流和直流两种等离子板以及场致发光板等,亮度小,色域有限,或者发光效率低,此外,还有寿命问题等。因此发展平板电视好象又回到显象管方面来了。传统显象管体积大、管身长。为此最初探索平板电视的方法就是缩短显象管的长度。故五十年代初,菲利浦公司就想到把容纳电子枪的管颈弯一个角度,以减少管子的总长。但结果却增加了偏转散焦和图象畸变,并且线圈装
The main problem with flat panel TVs is the need to have a flat panel display device. At present, the new flat panel display devices have electroluminescent panels, liquid crystal display devices, gas discharge (plasma) panels and the like, and have obtained practical applications. However, for television displays, the performance of the new flat panel display devices still can not keep up with the existing display tubes. Table 1 shows a comparison of these with the existing kinescopes and the latest flat tubes (beam guides, etc.) to be described herein. The table shows: AC and DC two kinds of plasma panels and electroluminescent panels, etc., low brightness, limited color gamut, or low luminous efficiency, in addition, there are life issues. Therefore, the development of flat-panel TVs seems to be back to the picture tube came. Traditional picture tube bulky, long tube. To this end, the first method to explore flat-panel TV is to shorten the length of the picture tube. Therefore, in the early 1950s, Philips thought of bending the neck of an electron gun to reduce the total length of the tube. But the result is increased deflection defocus and image distortion, and the coil installed