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二手投影设备选购时要注意什么？

二手投影设备选购时要注意什么？

浏览：42次 | 提问时间： 08-06 11:33

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你不是真的快乐 08-06 11:34

亮度与对比度要适中　　亮度是衡量投影机性能的一个重要指标。亮度是投影机输出到屏幕上的光的强度，高亮度可以使投影机投射图像清晰亮丽，不过亮度越高价格越贵。高亮度的投影机在小环境(50平方米以下)中使用很刺眼，会使眼睛疲劳，长期*会使眼睛红肿甚至出现眼病。因此根据客厅面积的不同，选购的家用投影机亮度一般都在500到1000流明之间。选择合适的分辨率　　投影机和数码相机、数码摄像机一样，品评它的画面质量都以分辨率为标准。数字投影机的分辨率分为XGA等级，即1024×768dpi;SVGA等级，即800×600dpi;SXGA等级，即1280×1024dpi，市面上较为常见的为前两种。需要注意的是分辨率越高，价格也越贵。另外还有一个兼容分辨率，兼容分辨率比其物理分辨率高一个台阶。和DC、DV一样，分辨率越高，投影机的图像越清晰，价格也越高。虽然说SVGA的效果已经能满足家庭的需要，但是从长远的角度看，如果经济条件允许，最好购买物理分辨率为XGA标准的投影机，它显示的效果更清晰。

我爱的他不是你 08-06 11:42

2手投影仪一般很少有卖的基本上都是维修过的投影仪买2手投影义主要看灯泡换过没有换过的可以购买，没有换过的基本没有买的价值

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二手投影设备选购时要注意什么？