Modern technology makes it easy to get rid of unnecessary wires, creating a comfortable multimedia space in the living room. Image broadcast Casting your laptop or desktop computer to a big-screen TV opens up new possibilities for watching movies, presentations, and games. Instead of watching content on a small screen, you can enjoy high-quality, high-definition images using only a wireless connection.
There are several proven methods that allow sync devices Without an HDMI cable. The specific method you choose depends on your computer's operating system, TV software version, and supported data transmission standards. In this article, we'll cover all the current connection options in detail so you can choose the one that best suits your situation.
Before proceeding with the settings, make sure both devices are connected to the same local Wi-Fi networkThis is a fundamental requirement for most wireless protocols to function. If the router transmits signals on both 2.4 GHz and 5 GHz frequencies, it's advisable for both the PC and TV to be in the same frequency range to ensure stable video streaming speeds.
Wireless video streaming technologies: Miracast, DLNA, and AirPlay
Understanding the differences between the major data transfer protocols will help avoid confusion during setup. Miracast is a standard developed by the Wi-Fi Alliance that allows for direct device-to-device video and audio streaming, creating a direct Wi-Fi connection. This technology is often built into Windows and many Smart TVs, eliminating the need for a router during streaming, although a network connection is often required for the initial handshake.
Unlike him, DLNA (Digital Living Network Alliance) works differently: it's a protocol for sharing media content between devices within a home network. It doesn't fully mirror the screen (clone the desktop), but only streams selected video, photo, or music files. For DLNA to work, a media server must be running on the computer, which can be a standard Windows Media Player or specialized software.
Owners of Apple technology are familiar with the technology AirPlayIt allows you to stream content from iOS and macOS devices to compatible TVs. If you have a Mac and an Apple TV (or a Smart TV with AirPlay 2 support), this method provides the best quality and minimal latency. However, there is no native AirPlay support for Windows PCs, requiring the use of third-party emulators.
⚠️ Please note: Your Wi-Fi network's bandwidth directly impacts image quality. If your router is old or the signal is weak, you may experience stuttering or compression artifacts when streaming in 4K.
Connecting Windows 10 and 11 to Smart TV via Miracast
Windows 10 and 11 operating systems have a built-in projection feature based on the Miracast standard. This is the easiest way clone the screen or extend your desktop without installing additional software. Most modern Samsung, LG, Sony, and Philips TVs support this feature out of the box, often calling it Screen Mirroring, Smart View, or simply Wireless Monitor.
To start broadcasting, 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 devices within Wi-Fi range. If your TV is in connection standby mode (sometimes this is required in the signal source menu by selecting "Wireless Display" or "Screen Share"), it will appear in the list.
After selecting a TV, a connection confirmation request may appear on the screen, which must be accepted with the remote control. In the projection settings (Settings → System → Project to this PC) you can set the operating mode: second screen only, duplicated, or expanded. You can also adjust the resolution and frame rate, which is important for reducing network load.
☑️ Check before connection
If the connection is successful, you will see your desktop on the big screen. Please note that input lag Input lag can be noticeable when using Miracast. This makes it great for watching videos or presentations, but unsuitable for fast-paced shooters or competitive games where every millisecond of reaction time is crucial.
Using DLNA to stream media files
If your goal is not to show the desktop, but simply to run a movie or slideshow of photos stored on your hard drive, the protocol DLNA will be the optimal choice. It's less demanding on processor resources and doesn't put as much strain on the Wi-Fi channel as streaming encoding of the entire screen. In this case, the TV acts as a renderer, and the computer acts as a server.
In Windows 10 and 11, the media server feature is often enabled by default. To check the settings, go to Control Panel → Network and Internet → Network and Sharing Center → Streaming Media SettingsHere you'll see a list of devices on the network. Make sure your TV's status is "Allowed." You can customize the device's name to easily identify it on the TV screen.
Once the server is set up, simply open the video file in a standard player (such as Movies & TV or VLC), right-click, and select "Cast to Device." Select your TV from the list. Playback will begin automatically, and the player control window will appear on the monitor.
| Characteristic | Miracast | DLNA | AirPlay |
|---|---|---|---|
| Transmission type | Screen mirroring | File transfer | Duplication and files |
| Windows support | Native | Native | Software required |
| Router dependency | Desirable (for searching) | Required | Required |
| Latency | Medium/High | None (buffering) | Low |
⚠️ Important: Video file formats must be supported by your TV. DLNA doesn't transmit the codec; it only streams the data. If the TV doesn't support the MKV format or the HEVC codec, the file won't play, unlike Miracast, which streams a pre-programmed image.
What to do if the TV doesn’t see the computer?
Make sure the "Private" profile is selected in your network settings, not "Public." Windows blocks device discovery in the public profile for security reasons. Also, check that UPnP is enabled in your router.
Broadcasting from macOS and iOS devices (AirPlay)
The Apple ecosystem offers the most seamless connectivity experience across technology AirPlayIf you have an Apple TV, this usually doesn't pose any problems. However, many modern Smart TVs (Samsung, LG, Sony, Vizio) now have built-in AirPlay 2 support, eliminating the need for an additional set-top box.
To mirror your Mac's screen to your TV, click the Control Center menu icon (the two crossed rectangles) and select "Mirror Screen." Available displays will appear in the list. When you first connect, a 4-digit code may appear on your TV screen. This code must be entered on your computer. This is a security measure to prevent unauthorized access to your screen.
iPhone and iPad owners can use the "Screen Mirroring" feature in Control Center. The iOS interface automatically adapts: in landscape mode, videos will take up the entire screen, while vertical apps will appear with black borders on the sides. It's important to note that AirPlay requires a stable connection. 5 GHz to transmit high-quality video without artifacts.
If your TV is older and doesn't support AirPlay, but you want to use your iPhone to display the image, you can use third-party emulator apps installed on your Smart TV (such as AirScreen or Receiver for AirPlay). These create a virtual receiver that Apple devices can understand.
Third-party programs for expanding functionality
The built-in operating system tools aren't always perfect. Sometimes the built-in Miracast is unstable, or the TV doesn't support the required codecs. In such cases, third-party software, which may offer better optimization, 4K HDR support, or the ability to stream over the internet rather than just a local network.
One of the popular programs is LetsViewThis free app is available for Windows, macOS, Android, and iOS. It not only allows you to mirror your screen but also control your computer from your phone, and features a "Whiteboard" mode for collaboration. Installation is required on both devices, after which they can find each other via a QR code or name.
Another powerful tool is ApowerMirrorIt offers more advanced settings, including screen recording, screenshots, and keyboard and mouse control (for Android/iOS). The free version may have session time or quality limitations, but the functionality is sufficient for one-time tasks. The program can even work across devices on different networks, using a dedicated account.
For gamers who want to stream images from a PC to a TV with minimal latency, the platform's functionality is often used. SteamThe "Remote Play Together" feature lets you run a game on a powerful PC and stream the image to a TV running the Steam Link client. This provides superior gaming performance compared to Miracast.
⚠️ Note: Third-party applications often require the installation of virtual display drivers. When installing, carefully read the installation wizard to avoid installing additional unwanted software (adware), which is sometimes included with the application.
Troubleshooting and network optimization
Even with proper setup, users may encounter problems: the image flickers, the sound disappears, or the devices fail to connect. Most often, the root of the problem lies in the settings. Wi-Fi routerIf the channel is overloaded with neighboring networks, the channel width is reduced, or power-saving modes are enabled, it is difficult to ensure a stable video stream.
Try rebooting the router and both devices. This is a simple but effective tip that clears the network service cache. Also, make sure AP Isolation isn't enabled on the router—this feature prevents devices on the network from seeing each other, making it impossible to connect via DLNA or Miracast.
If you're using a laptop, check your Wi-Fi adapter's power settings. In power-saving mode, the adapter may reduce signal strength or periodically turn off, causing connection drops. In Device Manager (devmgmt.msc) Find your wireless adapter, go to its properties and on the "Power Management" tab, uncheck the box next to "Allow the device to turn off."
If you're having audio issues (when you have a picture but the audio is coming from your PC speakers), click the speaker icon in the Windows tray, select the output device, and select your TV or wireless audio device from the list. Sometimes you'll need to manually switch the playback device after starting the broadcast.
Why doesn't the TV see the computer even though Wi-Fi is on?
Most often, the problem is with the network profile. If Windows considers the network "Public," it hides your PC from other devices. Go to Network Settings and change the profile to "Private." Also, check your antivirus software—it may be blocking incoming connections.
Is it possible to display a screen via Wi-Fi Direct without a router?
Yes, Miracast and Wi-Fi Direct technology allow you to create a direct connection between your PC and TV without a router. However, for the initial device search, a shared network (or at least one device sharing the network) is often necessary. Once a handshake connection is established, traffic flows directly.
Does screencasting affect internet speed?
When using Miracast or AirPlay, traffic flows within the local network and doesn't consume your ISP's internet bandwidth. However, if you watch online videos (YouTube, Netflix) and stream them to your TV, your data usage is affected. Furthermore, active video streaming consumes Wi-Fi bandwidth, which can reduce speeds for other devices.
How to improve the image quality if it is blurry?
Make sure your PC's resolution is set to the TV's native resolution (usually 1920x1080 or 3840x2160). In the Miracast settings, try lowering the frame rate from 60 to 30 Hz if your network is weak. Also, check that your TV isn't in "Movie" or "Game" mode, which may apply filters that reduce text clarity.