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1.黑电平延伸的视觉效果电视机显像管几经改进力图扩大灰度等级,如使屏幕尽量平面化,以减小对外来光的反射;在屏幕内表面涂上黑色涂层(黑底),以使暗场黑色处更黑。虽然如此,电子束直射式屏幕灰度等级仍不尽人意,画面背景无层次感,尤其是夜景总是灰蒙蒙的一片,提高亮度则会成为一片白光。
1. The black level extends the visual effects TV tube after several improvements trying to expand the gray level, such as the screen as flat as possible to reduce the reflection of external light; the inner surface of the screen coated with black coating (black) So that the black field darker darker. Nevertheless, the gray level of the electron beam direct screen is still unsatisfactory, the background of the picture has no sense of gradation, especially the night landscape is always a gray one, and the brightness increase will become a white light.