摘要 |
PURPOSE:To improve contrast and brightness of an image by mixing a material to absorb luminous colors out of the luminous zone of orange color, with a fluorescent body forming a phosphor screen of which luminous color and persistent color turn to orange. CONSTITUTION:A material to absorb luminous colors out of the luminous zone of orange color with good heat conductivity, such as red oxide powder or cadmium sulfite powder is mixed with a fluorescent body forming a phosphor screen of a cathode-ray tube for rader on the inside wall of a panel of which luminous color and persistent color turn to orange by the stimulation of electron rays. Therefore, as characteristics of the fluorescent body having orange luminous color are improved, reduction of contrast of a rader image by daylight in the daytime is retarded and deterioration of the fluorescent body with heat is decreased, thereby to reduce screen burning with electron rays. |