选购投影机时需关注的关键指标
随着大屏显示需求的增加，越来越多的人选择投影机作为日常观影工具。为了帮助用户更好地了解选购投影机时需要关注的关键指标，我们将详细介绍这些参数。
光源类型
在选购投影机时，光源是一个重要因素。主要有以下几种：
1. 灯泡：灯泡光源是目前技术最成熟的一种，主要包括超高压汞灯泡（UHE、UHP）、疝气灯和金属卤素灯。它们具有较高亮度，可达上万流明，非常适合商务、工程及教育等场合。然而，其寿命相对较短，后期维护成本也较高。
2. LED：LED光源因其色彩表现稳定、寿命长以及开机即亮等优点而受到青睐。但与其他类型相比，其亮度稍低，更适合在遮光环境中使用，例如家庭影院。
3. 激光：激光技术近年来逐渐兴起，它具备亮度大、色域广和强大的色彩还原能力。不过，由于技术难度大和造价偏高，目前更多面向高端市场。
显示技术
1. 3LCD：This technology uses a prism to split light into red, green, and blue components, which are then projected onto the screen.
2. DLP：DLP通过数字微镜设备（DMD）反射分离后的RGB三色，实现图像呈现。其中三片DLP提供了更好的颜色还原效果，而单片或双片则依赖于转动的色轮来分离颜色。
亮度要求
The brightness of a projector is crucial for its performance; generally speaking, the higher the brightness, the clearer and brighter the image will be under similar conditions.
- * 光源亮度：*The total visible light output from the projector's source.
- * 峰值亮度：*The maximum brightness achieved in a single point of projection.
- * ANSI 亮度：*A standardized measure that assesses average brightness across multiple points on-screen.
对比度分析
The contrast ratio indicates how well a projector can display differences between bright whites and dark blacks; thus, higher ratios lead to richer images with more depth.
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* 测试方法包括全开/全关（FOFO）和ANSI对比率，这两者所测得的数据可能存在显著差异，因此应仔细确认测试标准。
分辨率的重要性
A projectors resolution significantly impacts image clarity—the higher it is, the finer details become visible. Common resolutions include SVGA (800×600), XGA (1024×768), 720P, and 1080P; while home theater projectors may even reach up to 4K quality.
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- Please differentiate between standard resolution (the native support) and compatible resolution (the input signal it can accept).
This understanding ensures you select an appropriate model based on your specific viewing needs!