不知道连续两期在讨论对比度这个令人有点搞不清的参数与对应测试结果的含义之后,各位现在明白了对比度参数背后所代表的意义了吗?而在这期我们则要讲讲一些基本的投影系统设备的选购要领,包括投影幕与投影机。在此之前,我们收到了一个读者的咨询,当中提到了一个颇为有趣的问题,具体是这样的:“我所使用的投影系统之中没有采用投影幕,而是直接投射在白墙之上,但经过一 Do not know two consecutive discussions in the contrast is a bit confused after the meaning of the parameters and the corresponding test results, you now understand the contrast behind the meaning of the parameters it? And in this period we have to talk about some of the basic The projection system equipment purchase essentials, including projection screen and projector. Before this, we received a reader’s consultation, which mentioned a rather interesting issue, specifically: ”I did not use the projection screen projection screen, but directly projected on the white wall On, but after one