Modern multimedia capabilities make it easy to display images from a laptop or desktop PC on a large TV screen using a wireless connection. This eliminates the need to find long HDMI cables and run them across the room, which is especially useful for watching movies, presentations, or online broadcasts. Wireless data transmission technology has become the de facto standard for most modern devices that support it. Wi-Fi Direct or working in the same local network.
The setup process may vary depending on your computer's operating system and TV brand. Owners Samsung, LG or Sony You may encounter different feature names, such as Screen Share, Smart View, or AirPlay 2. However, the basic principle remains the same: both devices must be connected to the same access point, and the relevant features must be enabled in the settings.
In this article, we'll cover all current connection methods in detail, including native Windows and macOS tools, as well as third-party apps. You'll learn how to eliminate lag, improve image quality, and resolve common connection issues that often arise when first starting a stream.
Wireless Image Transmission Technologies: Which One to Choose?
Before you begin setting up, it's important to understand which data transfer protocol your equipment supports. There are several main standards, each with its own specific features and compatibility limitations. Choosing the right method is 80% success in stable screen mirroring without delays.
The most common standard for Windows and Android TVs is MiracastThis technology works directly between devices, creating a secure Wi-Fi connection and doesn't require a router, although it is most often used through one. The Apple ecosystem uses the protocol AirPlay, which provides high stability and image quality, but requires Apple devices or TVs with built-in support for this standard.
The technology is worth mentioning separately. Google Chromecast, which is built into many modern Smart TVs. Unlike Miracast, which often simply mirrors the screen, Chromecast allows you to stream the contents of a browser tab or desktop with more intelligent data flow control. Some manufacturers, such as LG And Samsung, use their own implementations based on these open standards.
It's important to keep in mind that transmission quality depends not only on the selected protocol, but also on the Wi-Fi network frequency. For high-definition video transmission 4K or Full HD It is highly recommended to use the range 5 GHz, as it is less congested and provides higher throughput.
Preparing equipment and network for stable operation
Successful screen mirroring is impossible without proper infrastructure preparation. The first and most critical requirement is that the computer and TV are on the same subnet. This means both devices must be connected to the same router, regardless of whether they use a wireless or cable connection.
Please check your firewall and antivirus settings on your computer. System protections often block incoming connections needed to detect the TV. In your Windows network profile, you must select the "Private" network type for the system to allow discovery of other devices.
⚠️ Important: If your router supports the "Guest Network" feature, do not connect devices to it for streaming. Guest networks isolate devices from each other for security purposes, so your computer simply won't see your TV.
It's also worth checking that your PC's wireless adapter drivers are up-to-date. Outdated network card software may not work correctly with new encryption standards or media transfer protocols. Update your drivers through Device Manager or the laptop manufacturer's website.
☑️ Preparation checklist
Setting up screen mirroring in Windows 10 and 11
Windows operating systems have built-in functionality for wireless connection to displays, making the process as simple as possible. You won't need to install any additional software if your TV supports the Miracast standard.
To get started, press the key combination Win + K on the keyboard. The "Connection" panel will open on the right, where the system will begin searching for available wireless displays. If the TV is already turned on and ready to pair, its name will appear in the list.
After selecting the device, a connection confirmation message may appear on the TV screen. Use the remote control to press "Allow" or "Accept." The desktop image will then appear on the big screen.
To control the display mode, press Win + PThere are four main options available here:
- 🖥️ Computer screen only — the image remains on the PC monitor, the TV goes out.
- 🔁 Recurring — the picture on both screens is the same (mirroring).
- ↔️ Expand — the TV becomes a second monitor, you can drag windows.
- 📺 Second screen only — the PC monitor goes dark, the image is only on the TV.
⚠️ Note: The Projection menu interface in Windows may vary slightly depending on the update version installed (21H2, 22H2, etc.). If the Connect button is missing, check the Windows Connection Manager service in the Services section.
What to do if Windows doesn't see the TV?
If the search yields no results, try refreshing the page in the connection menu or rebooting the Wi-Fi module. Also, make sure the signal-receiving app (often called Screen Share, Miracast, or simply "Cast from Phone/PC") is running on your TV. In rare cases, temporarily disabling your antivirus software may help.
Streaming from macOS: AirPlay and compatible TVs
Apple computer users can take advantage of the technology AirPlay, which provides high-quality video and audio transmission. For this method to work, the TV must support AirPlay 2 (many modern models do). Samsung, LG, Sony, Vizio) or you must have it connected Apple TV.
The connection process is intuitive: in the macOS menu bar (upper right corner), find the "Screen Mirroring" icon (two rectangles). Click it and select your TV from the list of available devices. If this is your first time, a four-digit code may appear on the TV screen, which you'll need to enter on your computer.
Unlike Windows, macOS allows you to flexibly customize display settings via System Preferences -> Displays. Here you can choose the resolution, refresh rate, and even use the TV as a separate desktop without duplicating the main display.
It's important to note that when using AirPlay, input lag is usually minimal, making it possible to even use the TV as a gaming monitor for leisurely gaming. However, for competitive shooters, a wired connection is still better.
| Parameter | AirPlay (Apple) | Miracast (Windows) | Chromecast |
|---|---|---|---|
| Ecosystem | macOS, iOS | Windows, Android | Cross-platform |
| Picture quality | High (up to 4K HDR) | Depends on the drivers | High (adaptive) |
| Delay | Low | Average | Low (in browser) |
| Requirements | TV or Apple TV support | Miracast support | Chrome browser or built-in Chromecast |
Using Google Chrome Browser for Broadcasting
If the built-in operating system tools don't work or the TV doesn't support native protocols, a browser comes to the rescue. Google ChromeIt has a built-in streaming feature that works on Windows, macOS, and Linux.
To start, open your browser, click the three dots in the upper right corner, and select "Cast." In the menu that opens, you can select the source: a browser tab, the entire desktop, or a specific file. Then select the target device—your TV.
This method is especially convenient if you need to show the contents of a specific tab containing a presentation or video. When you select the "Cast Desktop" option, the browser will ask for permission to capture the screen, after which the image will be sent to the TV.
The advantage of this method is its versatility: it works with virtually any TV with a built-in Chromecast or YouTube app. However, image quality may be slightly lower than with system tools due to additional video stream compression.
Troubleshooting: Delays, no picture or sound
Even with proper setup, users may encounter technical issues. The most common of these is audio and video desynchronization or image freezing. This almost always indicates Wi-Fi bandwidth issues.
If the image is flickering, try moving the router closer to the TV and computer or switch to a different range. 5 GHzAlso, make sure no one on the network is downloading large files, which could clog up the bandwidth. In some cases, lowering the output resolution on your computer to 1920x1080.
If there's no sound but there's an image, you can fix it by changing the default output device. In Windows, click the speaker icon in the system tray and select the name of your TV. In macOS, you can do this through the Sound menu in Settings or the AirPlay menu.
⚠️ Warning: If you're using a VPN on your computer, wireless streaming will likely not work. A VPN changes the network address and routing, preventing devices from "seeing" each other on the local network. Disable the VPN before connecting.
If all else fails, reboot the router. Often, accumulated errors in network equipment can be resolved by simply turning the power off for 10-15 seconds.
Frequently Asked Questions (FAQ)
Is it possible to connect a computer to a TV without a router?
Yes, this is possible using Wi-Fi Direct technology (an implementation of Miracast). The computer and TV will create a direct wireless connection between them. However, in this case, the computer may lose internet access if its network card doesn't support dual-band operation.
Why is there no sound during the broadcast, although the video is playing?
Most likely, your system is set to "Speakers" as the default audio output device instead of your TV. You can change the audio output in your OS's sound settings or directly in the casting control menu (for example, in the AirPlay or Chrome Cast panel).
Does screencasting affect internet speed?
When using technologies like Miracast or Wi-Fi Direct, the internet is not used; traffic flows locally. However, if you stream content from an online cinema through a browser (Chromecast), your internet speed will be used to download the video.
How to disable screen mirroring?
The easiest way is to press a combination Win + K (for Windows) and select "Disconnect," or click the AirPlay/Cast icon and select "Stop Casting." You can also simply turn off your TV or disconnect from the Wi-Fi settings.