购买新屏幕令人兴奋，但术语繁杂的规格表会让您感到不知所措。定义您的观看体验的主要规格之一是屏幕的分辨率。
如果您过去曾修改过 Windows 显示设置，那么您可能遇到过分辨率这个词。如果您在将 HDTV 用作显示器(using your HDTV as a monitor)时遇到过扫描问题或想要提高显示质量，则更改分辨率会有所帮助。(Changing the resolution)但是分辨率是什么意思？
屏幕分辨率是什么意思？
分辨率是描述屏幕显示的图像清晰度的度量。该术语用于屏幕（电视(TVs)、监视器和移动屏幕）等硬件组件和图像等软件组件。
屏幕分辨率表示为屏幕在水平和垂直方向（即宽度 x 高度）产生的像素数。
大多数规格表没有将分辨率写为宽度 x 高度，而是使用 720p (HD)、1080p ( Full HD ) 和 4K 等术语。这些是最常用的分辨率，至少目前是这样，尽管还有其他几种分辨率，如 1440p、2K 和 8K。
所有这些分辨率都可以表示为宽度 x 高度：
- 480p：640 x 480 像素（标清）
- 720p：1280 x 720 像素（高清）
- 1080p：1920 x 1080 像素（全高清）
- 2K：2048 x 1080 像素
- 1440p：2560 x 1440 像素
- 4K：3840 x 2160 像素
- 8K：7680 x 4320 像素
我们将回到分辨率，但让我们先谈谈像素是什么。
什么是像素？
像素是屏幕上的一个点。总的来说，屏幕上的所有像素构成了您在电视或显示器上看到的图像。如果你看得很近，你可以在屏幕上看到每个像素作为小点。
屏幕上的像素越多，图像质量就越好。这就是为什么更高的分辨率可以转化为更好、更清晰的图像的原因。
例如，一个 4K 分辨率的屏幕从左到右有 3840 像素，从上到下有 2160 像素。这意味着水平与垂直像素的比率（即纵横比）为 16:9。
几乎所有的屏幕分辨率（除了少数像 4K Ultra HD）都有 16:9 的纵横比。这确保了均匀性，因此屏幕上的图像不会显得拉伸或扭曲，也不会在边框周围有任何填充。
最常见的决议
720p、1080p 和 4K 是目前最常见的屏幕分辨率。当您尝试对新屏幕做出明智的决定时，对这些分辨率有所了解会很有帮助。
什么是720p分辨率？(What is 720p resolution?)
720p（即高清）屏幕有 1280 x 720 像素，这意味着它总共有 921,600 像素。大约十年前，720p 是行业标准，但后来被 1080p 取代。但是，720p 仍然在很多小尺寸屏幕中使用。
什么是1080p分辨率？(What is 1080p resolution?)
1080p（即全高清(Full HD)）屏幕具有 1920 x 1080 像素，相当于 2,073,600 像素。这是 720p 屏幕上的两倍多。如果您对720p 和 1080p 感到困惑(confused between 720p and 1080p)，最好选择 1080p。它是目前制作大多数在线和电视内容的主要分辨率。
什么是4K分辨率？(What is 4K resolution?)
4K 屏幕有 3840 x 2160 像素或总共 8,294,400 像素。这是 1080p 屏幕上的 4 倍像素，或 720p 屏幕上的 9 倍像素。但是，4K 屏幕也可以是 Ultra HD(4K screens can also be Ultra HD)，这与 4K 不同。
4K 屏幕已经出现了一段时间，但直到最近才进入主流。这是因为它们曾经相当昂贵，但现在可以以更实惠的价格买到。
选择分辨率时要考虑的事项
既然您知道分辨率的含义，您可能会好奇在选择屏幕分辨率时应该考虑哪些因素。您应该考虑的两个主要事项是屏幕的尺寸和与屏幕的观看距离。
屏幕尺寸(Screen Size)
如果您购买的是小屏幕，比如 24 英寸，那么任何超过 1080p 的屏幕都不会产生显着差异。但是，如果您要购买 65 英寸的屏幕，则至少应选择 4K。
原因？像素密度。
像素密度是屏幕一英寸内包含的像素数，使用称为每英寸像素数 ( (Pixel)PPI )的度量标准来衡量。大屏幕具有更高的分辨率很重要，因此像素密度足够高以显示高质量的图像。
例如，4K 分辨率的 65 英寸电视的 ppi 约为 67。相比之下，分辨率为 1080p 的 24 英寸电视的 ppi 更高，约为 91。即使 65 英寸电视的分辨率更高，由于更高的像素密度，图像在 24 英寸电视上会显得更清晰。
如果您要购买电视，90-110 的 ppi 被认为是最佳选择。对于显示器，您的目标应该是更高的 ppi，大约为 200-250 或更高，具体取决于您的观看距离。您可以使用在线ppi 计算器(ppi calculator)来比较不同尺寸和分辨率的屏幕。
视距(Viewing Distance)
您应该考虑的另一个因素是观看距离，这取决于您使用屏幕的目的。如果您要购买电视，您可能会从比显示器更远的距离观看它。这意味着您可以选择略低的 ppi。
但是，如果您购买的是电脑显示器，您与屏幕的观看距离会相对较短。较高的 ppi 将确保您在使用时不会在屏幕上看到像素。
准备好升级了吗？
如果您的屏幕已经使用了一段时间，并且该升级了，那么将 1080p 作为最低要求。如果您没有预算限制并且正在购买中型或大屏幕，请考虑购买 4K 屏幕。
当您花很多钱购买 4K 屏幕时，很自然会担心它会持续多久。然而，8K 远未进入主流。虽然可用，但价格不切实际。
What Does Resolution Mean When Buying a TV or Monitor?
Buying a new screen iѕ excіting, but the jargon-heavy spec sheets can make yoυ feel ovеrwhelmed. Оne of the primary specifications that defines your viewing experience is the screen’s resolution.
If you’ve tinkered with your Windows display settings in the past, you’ve probably come across the word resolution. Changing the resolution can help If you have an overscan issue when using your HDTV as a monitor or want to improve your display quality. But what does resolution mean?
What Does Screen Resolution Mean?
Resolution is a measure that describes the clarity of an image displayed by the screen. The term is used for both hardware components like screens (TVs, monitors, and mobile screens), and software components like images.
Screen resolution is expressed as the number of pixels that a screen produces horizontally and vertically (i.e., width x height).
Instead of writing the resolution as width x height, most spec sheets use terms like 720p (HD), 1080p (Full HD), and 4K. These are the most commonly used resolutions, at least currently, though there are several other resolutions like 1440p, 2K, and 8K, as well.
All these resolutions can be expressed as width x height:
- 480p: 640 x 480 pixels (SD)
- 720p: 1280 x 720 pixels (HD)
- 1080p: 1920 x 1080 pixels (Full HD)
- 2K: 2048 x 1080 pixels
- 1440p: 2560 x 1440 pixels
- 4K: 3840 x 2160 pixels
- 8K: 7680 x 4320 pixels
We’ll circle back to resolution, but let’s first talk about what pixels are.
What Are Pixels?
A pixel is a dot on your screen. Collectively, all the pixels on your screen make up the images that you see on your TV or monitor. If you look real close, you can see each pixel as tiny dots on the screen.
The more pixels there are on your screen, the better the quality of the image. This is why a higher resolution translates to better, crisper images.
For instance, a 4K resolution screen has 3840 pixels from left to right, and 2160 pixels from top to the bottom. This means the ratio of horizontal to vertical pixels (i.e., aspect ratio) is 16:9.
Almost all screen resolutions (except a few like 4K Ultra HD) have an aspect ratio of 16:9. This ensures uniformity so the images on your screen don’t appear stretched or distorted, or have any padding around the border.
Most Common Resolutions
720p, 1080p, and 4K are currently the most common screen resolutions today. Knowing a little about these resolutions is helpful when you’re trying to make an informed decision about your new screen.
What is 720p resolution?
A 720p (i.e., high definition) screen has 1280 x 720 pixels, which means it has a total of 921,600 pixels. 720p was the industry standard about a decade ago, but has since been replaced by 1080p. However, 720p is still used in a lot of small-sized screens.
What is 1080p resolution?
A 1080p (i.e., Full HD) screen has 1920 x 1080 pixels, which translates to 2,073,600 pixels. That’s over twice as many as on a 720p screen. If you’re confused between 720p and 1080p, it’s best to pick 1080p. It’s currently the dominant resolution in which most of the online and TV content is produced.
What is 4K resolution?
A 4K screen has 3840 x 2160 pixels or a total of 8,294,400 pixels. That’s 4x the pixels on a 1080p screen, or 9x the pixels on a 720p screen. However, 4K screens can also be Ultra HD, which is different from 4K.
4K screens have been around for a while, but have only recently entered the mainstream. This is because they used to be fairly pricey, but they’re now available at a much more pocket-friendly price.
Things to Consider When Choosing a Resolution
Now that you know what resolution means, you may be curious as to what factors you should consider when choosing a screen resolution. The two primary things you should consider are your screen’s size and your viewing distance from the screen.
Screen Size
If you’re buying a small screen, say 24 inches, anything beyond 1080p won’t make a significant difference. If you’re buying a 65-inch screen though, you should choose 4K as a minimum.
The reason? Pixel density.
Pixel density is the number of pixels packed in one inch of the screen, and is measured using a metric called pixels per inch (PPI). It’s important for a large screen to have higher resolution, so the pixel density is high enough to display good quality images.
For instance, a 65-inch TV with 4K resolution has a ppi of about 67. Compare that with a 24-inch TV with 1080p resolution, which has a higher ppi of about 91. Even though the 65-inch TV has a higher resolution, the images will appear crisper on the 24-inch TV because of higher pixel density.
If you’re buying a TV, a ppi of 90-110 is considered the sweet spot. For a monitor, you should aim for a higher ppi of about 200-250 or more, depending on your viewing distance. You can use an online ppi calculator for comparing screens with different sizes and resolutions.
Viewing Distance
Another factor you should consider is the viewing distance, which depends on what you use the screen for. If you’re buying a TV, you’ll probably view it from a greater distance than a monitor. This means you can opt for a slightly lower ppi.
However, if you’re buying a computer monitor, your viewing distance from the screen will be relatively less. A higher ppi will make sure that you don’t see pixels on your screen while you’re using it.
Ready for an Upgrade?
If you’ve had your screen for a while, and it’s time for an upgrade, aim for 1080p as a bare minimum. If you don’t have a budget constraint and are buying a medium or large screen, consider investing in a 4K screen.
When you’re spending a lot of money buying a 4K screen, it’s natural to worry about how long it will stay relevant. However, 8K is far from entering the mainstream. Though available, it’s impractically expensive.
