投射是一种将内容以无线方式投影或发送到不同屏幕（例如电视或第二台显示器）的方法。设置好 Google Chromecast 设备(set up your Google Chromecast device)后，您就可以在电视或远程显示器上播放移动设备或桌面上的任何内容，而该设备将成为遥控器。
它为您省去了使用HDMI电缆(HDMI)将 PC 连接到电视(hooking up your PC to your TV)的痛苦麻烦，这在很大程度上取决于电缆的长度。此外，它还允许您通过单击几下以无线方式镜像整个屏幕或(mirror your entire screen)Google Chrome上的任何浏览器选项卡，这样您就可以查看照片等静态文件、显示演示文稿或查看更大范围的网站。
要创建Chromecast桌面连接，您需要一台Google Chromecast设备、您的 PC、互联网连接和您要投射到的电视。
Chromecast 铸造的工作原理(How Chromecast Casting Works)
使用 HDMI 电缆(using an HDMI cable)在电视上显示桌面屏幕和投射之间的主要区别在于前者是有线的，而后者是无线过程。但是，通过投射，内容会从受支持的服务（如Netflix或YouTube等）投射到您的电视上。
从本质上讲，您所做的是告诉您的Chromecast设备访问该服务，例如Netflix，获取特定视频，然后在您的电视上播放。您的设备（例如您的智能手机）将成为您播放、暂停、跳到下一集或完全选择不同视频的遥控器。(your smartphone, becomes the remote control)
与依靠云从 Netflix(stream content from Netflix)或YouTube流式传输内容的智能手机不同，您的桌面依靠 PC 的计算能力将内容从桌面投射到电视或远程监视器。
Chromecast 桌面投射(Chromecast Desktop Casting)
您需要的工具(Tools you’ll need)
- 您的 PC（具有最低系统要求( minimum system requirements)，包括Chrome浏览器）。
- 内置Chromecast的Chromecast设备或电视。
- 强大的WiFi网络可提供良好的性能。
第一步是检查(check the WiFi network)您的Chromecast桌面设备的 WiFi 网络，以确保它与您的 PC在同一个WiFi网络上。(WiFi)Chromecast一次只能记住一个WiFi网络，因此如果您更改了您的网络，请在新网络上设置Chromecast，或者如果您愿意，可以连接到新网络。
- 为此，请单击右下角 ( Windows ) 或右上角 ( Mac ) 桌面任务栏上的(Mac)WiFi 图标(WiFi icon)，然后查找WiFi网络的SSID。
- 在您的设备上打开Google Home应用，然后点按您的 Chromecast 的名称。
- 检查WiFi下的名称是否与您的计算机连接的名称相同。
- 一旦您确认他们在同一个网络上，请使用以下三种不同的方法通过 Chromecast 将您的桌面投射到电视上：
- 投射整个桌面屏幕
- 在 Chrome 上投射标签页
- 投射媒体（照片和视频）
投射整个桌面屏幕(Cast Your Entire Desktop Screen)
您可以使用Windows(Windows)、Mac上的Chrome和Chromebook(Chromebooks)投射整个计算机屏幕。
- 在电视上连接Chromecast后，在 PC 上打开Chrome 。
- 单击更多(More)（三个垂直点）并选择投射(Cast)。
- 接下来，单击投射桌面(Cast desktop)。
- 选择您要分享的内容，然后点击分享(Share)。您的桌面将显示在电视上。
在 Chrome 上投射标签(Cast a Tab On Chrome)
- 为此，请打开 Chrome，然后单击More > Cast。
- 您的选项卡将显示在电视上，并且会出现一个显示图标(display icon)（蓝色方形图标），而Active Cast图标将出现在地址栏右侧的扩展程序旁边。
- 要停止投射内容，请转到Chrome(Chrome)上地址栏的右侧，单击投射(Cast)，将鼠标光标悬停在Chromecast桌面设备名称上，然后单击停止投射(Stop casting)。
注意(Note)：如果这个过程听起来很长，可以通过添加一个Cast按钮在Chrome中缩短它。(Chrome)您可以将其固定到Chrome工具栏，以便下次您想从任何网页使用它时更轻松地访问它。
要固定 Cast 按钮，请在Chrome上单击(Chrome)More>Cast…。该按钮将暂时出现在浏览器工具栏上，但您可以右键单击Cast按钮并选择始终显示图标(Always show icon)以将其永久保留在那里。
演员媒体（照片和视频）(Cast Media (Photos & Videos))
通过单击Chrome(Chrome)浏览器上的投射(Cast)，您可以从 PC 上查看电视上的照片或视频。图像或视频将同时显示在 PC 和电视上，但声音将在您的电视上播放，但应用程序和其他选项卡除外，它们的声音也会在您的计算机上播放。
- 为此，请打开Chrome，然后单击More > Cast。
- 选择要投射的文件(file)，选择您的Chromecast设备，然后在电视上查看您的媒体。
扩大您的屏幕房地产(Expand Your Screen Real Estate)
您可以使用 Chromecast 做(cool things you can do with Chromecast)很多很酷的事情，而Chromecast桌面投射只是其中之一。这将如何运作取决于您的WiFi信号的强度和可靠性，以及您 PC 的计算能力。它不像使用HDMI(HDMI)电缆进行投射那样完美，但它是将整个桌面镜像到电视的最简单、最便宜的无线方法。
让我们知道这些步骤中的任何一个是否对您有用，如果您有任何挑战，请通过在下面的部分中发表您的评论与我们分享。
How To Use Chromecast To Cast Your Entire Desktop To TV
Casting is a method of projecting or sending content wirelessly to a different screen such as your television or second monitor. Once you set up your Google Chromecast device, you can play any content from your mobile device or desktop on your TV or remote monitor, with the device becoming a remote control.
It saves you the painful hassles of hooking up your PC to your TV using an HDMI cable, which largely depends on the length of the cable. Plus, it allows you to mirror your entire screen or any browser tab on Google Chrome wirelessly with a few clicks so you can view static files like photos, display a presentation or view a website on a larger scale.
To create the Chromecast desktop connection, you’ll need a Google Chromecast device, your PC, an internet connection and the TV you’re casting to.
How Chromecast Casting Works
The main difference between using an HDMI cable to display your desktop screen on your TV and casting is that the former is wired, while the latter is a wireless process. However, with casting, the content is casted to your TV from a supported service such as Netflix or YouTube and others.
Essentially, what you’re doing is telling your Chromecast device to go to the service, for instance Netflix, fetch a particular video, and play it on your TV. Your device, for example your smartphone, becomes the remote control from where you play, pause, skip to the next episode, or pick a different video altogether.
Unlike smartphones, which rely on the cloud to stream content from Netflix or YouTube, your desktop relies on your PC’s computing power to cast content from your desktop to a TV or remote monitor.
Chromecast Desktop Casting
Tools you’ll need
- Your PC (with minimum system requirements including the Chrome browser).
- A Chromecast device or TV with Chromecast built-in.
- A strong WiFi network for good performance.
The first step is to check the WiFi network of your Chromecast desktop device to ensure it’s on the same WiFi network as your PC. Chromecast can only remember one WiFi network at a time, so if you changed yours, set up Chromecast on the new network or connect to a new one if you prefer.
- To do this, click on the WiFi icon on your desktop taskbar at the bottom right side (Windows) or upper right side (Mac), and look for your WiFi network’s SSID.
- Open the Google Home app on your device, and tap the name of your Chromecast.
- Check that the name under WiFi is the same as the one your computer is connected to.
- Once you’ve confirmed they’re on the same network, use these three different methods to cast your desktop to TV via Chromecast:
- Cast your entire desktop screen
- Cast a tab on Chrome
- Cast media (photos and videos)
Cast Your Entire Desktop Screen
You can cast your entire computer screen using Windows, Chrome on Mac, and Chromebooks.
- Once you connect Chromecast on your TV, open Chrome on your PC.
- Click More (three vertical dots) and select Cast.
- Click the Down arrow next to Sources.
- Next, click Cast desktop.
- Select your Chromecast device.
- Choose the content you’d like to share and click Share. Your desktop will display on the TV.
Cast a Tab On Chrome
- To do this, open Chrome, and click More > Cast.
- Select your Chromecast device.
- Your tab will display on the TV, and a display icon will appear (blue square icon), while the Active Cast icon will appear next to your extensions at the right side of the address bar.
- To stop casting the content, go to the right side of the address bar on Chrome, click Cast, hover your mouse cursor on your Chromecast desktop device name and click Stop casting.
Note: If this process sounds lengthy, it’s possible to shorten it in Chrome by adding a Cast button. You can pin it to the Chrome toolbar so that it’s easier to access next time you want to use it from any web page.
To pin the Cast button, click More>Cast…on Chrome. The button will appear temporarily on the browser toolbar, but you can right-click the Cast button and select Always show icon to keep it there permanently.
Cast Media (Photos & Videos)
You can view photos or videos on your TV from your PC by clicking Cast on the Chrome browser. The images or videos will show on both the PC and TV, but the sound will play on your TV, except for apps and other tabs, whose sounds will also play on your computer.
- To do this, open Chrome, and click More > Cast.
- Click the down arrow next to Sources.
- Select a file to cast, choose your Chromecast device, and view your media on the TV.
Expand Your Screen Real Estate
There are so many cool things you can do with Chromecast, and Chromecast desktop casting is just one of them. How well this will work depends on the strength and reliability of your WiFi signal, and your PC’s computing power. It’s not as perfect as casting using an HDMI cable, but it’s the easiest and inexpensive wireless method to mirror your entire desktop to your TV.
Let us know whether any of these steps worked for you, and if you have any challenges, share with us by dropping your comment in the section below.
