为了能在电视机屏幕上正确地显示图象,其亮度和对比度应满足一定的比例关系,这样才能充分显示电视图象的丰富层次.然而一般电视机都是独立地装置亮度和对比度的调节器,使用时通常要反复调节亮度和对比度旋钮才能达到满意的结果.若调节不当,就会失掉部分的图象层次.当亮度较亮而对比度不足时,图象就显得淡薄.而当亮度较低时,过强的对比度 In order to be able to properly display the image on the TV screen, the brightness and contrast should meet a certain proportion, so as to fully display the richness of the television image. However, the general television sets are independently adjustable brightness and contrast regulator , Usually need to repeatedly adjust the brightness and contrast knobs to achieve satisfactory results.If not adjusted properly, you will lose some of the image level.When the brightness is bright and the contrast is not enough, the image appears light.When the brightness is low When, too strong contrast