Modern technologies allow you to turn any Smart TV into a huge monitor for your laptop or desktop PC. Wireless connection Eliminates the need to run long HDMI cables across the room, keeping the interior neat and aesthetically pleasing. This solution is ideal for watching movies, presenting work projects, or even playing games on the big screen.
There are several main data transfer protocols that are used Wi-Fi Direct or a local network for streaming images. The specific method you choose depends on your computer's operating system, your TV's firmware version, and the supported standards. In this article, we'll cover all the current methods, from built-in Windows features to third-party apps.
It's important to understand that image quality and the absence of lag directly depend on the speed of your router and the stability of the signal. 4K video streaming requires a stable Wi-Fi speed of at least 50 Mbps and the use of the 5 GHz band. If the equipment is outdated, artifacts or desynchronization of the sound may occur.
Wireless image transmission technologies
Before you start setting things up, you need to understand the terminology. Miracast — is a wireless media transmission standard that allows you to broadcast your screen image without a router, using a direct connection between devices. This technology is often referred to as Wi-Fi Direct, and it's built into most modern TVs and Windows 10/11.
Unlike Miracast, the technology DLNA (Digital Living Network Alliance) works exclusively through a router. It doesn't broadcast a live screen, but allows you to transfer files (video, photos, music) from your computer to your TV. This protocol is used. UPnP, which automatically detects compatible devices on the local network.
The third popular option is to use Google Chromecast or built-in protocol Google CastThis method requires internet access and a Google account, but it provides high stability and allows you to control playback from your smartphone. Apple device owners can also use the protocol AirPlay 2, which is natively supported by many new TV models.
⚠️ Please note: Some budget TV models may not support Miracast on the hardware level, even if they claim to be Smart TV. In this case, you will need to purchase an external adapter, such as Microsoft Wireless Display Adapter or Google Chromecast.
Preparing equipment and network
90% of successful connection depends on proper network configuration. The computer and TV must be on the same local network. This means they must be connected to the same router. If you have a dual-band router, make sure both devices are connected to the same frequency (preferably 5 GHz), although modern routers often combine networks into a single SSID.
Check your firewall and antivirus settings on your computer. Often network profile It may be set as a "Public network," which prevents other devices from being discovered. You'll need to switch it to "Private network" or "Home network" in Windows settings.
It's also worth updating the drivers for your PC's wireless adapter. Go to device Manager, find your Wi-Fi module and check for updates. Outdated software may not work correctly with new encryption standards or video transmission protocols.
☑️ Check before connection
Using the built-in Windows function (Projection)
Windows 10 and 11 operating systems natively support Miracast technology. This is the fastest way to connect your computer to your TV wirelessly. First, make sure the signal reception feature is enabled on your TV. This feature may have different names: Screen Mirroring, Smart View (Samsung), Wireless Display (LG) or simply "Broadcast".
On your computer keyboard, press the key combination Win + KThe "Connect" sidebar will appear on the right. The system will begin searching for available wireless displays. If a TV is found, its name will appear in the list. Click it to initiate the connection.
You may see a connection confirmation prompt on your TV screen. Use your remote to grant access. Your Windows desktop will then appear on the big screen. You can change the operating mode using the menu. Projection: Duplicate your screen, extend your desktop, or display only on the second display.
⚠️ Note: If your TV is not displayed in the list of available devices, check your privacy settings. In the section
Settings → System → Project to this PCMake sure the feature is enabled and allowed for all devices.
What should I do if the connection keeps dropping?
Frequent connection drops are usually caused by Wi-Fi congestion or a weak signal. Try turning off other devices consuming bandwidth or moving the router closer to the TV. Disabling power saving for the Wi-Fi adapter in Device Manager also helps.
Broadcast via DLNA and media servers
If your goal isn't to mirror your desktop, but to watch a downloaded movie or photos, it's better to use DLNA. Windows has a built-in media server, but for advanced functionality, it's more convenient to use third-party software, such as Plex or Home Media Server.
To launch the built-in server, open "Media Streaming Settings" in the Control Panel. Select your TV from the list of available devices and allow access. Now, by opening a folder with a video file in a standard player (for example, Windows Media Player or VLC), you will see the "Transfer to device" button.
Select your TV, and playback will begin on the big screen. The advantage of this method is that you can use your computer for other tasks without interrupting your viewing experience. Furthermore, DLNA often provides more stable picture quality, as buffering occurs on the TV.
| Characteristic | Miracast / Wi-Fi Direct | DLNA | Chromecast Built-in |
|---|---|---|---|
| Transmission type | Real-time screen | Files (video, photo) | Streaming video from your browser |
| Router dependency | No (direct connection) | Yes (local network) | Yes (requires internet) |
| Latency | Low/Medium | Absent | Minimum |
| Using a PC | Not recommended (all actions are visible) | Free | Free (after launch) |
Using the Google Chrome browser
If Windows' built-in tools don't work or your TV doesn't support Miracast, a browser can help. Google ChromeIt has a built-in feature to cast tabs or the entire desktop to devices that support it. Chromecast.
Open the Chrome browser on your computer. Click the three dots in the upper-right corner of the menu and select "Save and Share" (or just the three dots in older versions), then "Cast." A list of available devices will appear in the window that opens.
By default, the browser will offer to cast the current tab. However, by clicking the "Sources" button, you can choose to "Cast Desktop" or "Cast File." This is a universal method that works even on older Smart TVs, as long as they have the appropriate plugin installed or the Android TV OS.
Troubleshooting connection and latency issues
Even with proper setup, technical difficulties can arise. One common issue is audio and video desync. This can be addressed in the TV settings: find the "Audio Delay" setting and adjust it manually, or use the sync settings in your video player.
If the image is choppy or low resolution, check your Wi-Fi bandwidth. Downloading large files on other devices can choke your stream. In this case, adjusting QoS (Quality of Service) in the router, where priority is given to TV or computer traffic.
It's also worth considering that a wireless connection always introduces a slight input lag. While this isn't noticeable when watching movies, it can be critical for fast-paced shooters. In such cases, it's better to use a cable or optimized game streaming.
⚠️ Please note: TV menu interfaces from different manufacturers (Samsung, LG, Sony, Philips) may differ. If you can't find the option you need, check the official instructions for your model, as menu item names may be localized differently.
Frequently Asked Questions (FAQ)
Is it possible to connect a computer to a TV if there is no router?
Yes, this is possible using Wi-Fi Direct (Miracast) technology. In this mode, the TV itself creates an access point to which the computer connects, or a connection is established directly between the adapters without the need for external infrastructure.
Why isn't my TV visible in the list of wireless displays?
Most often, the cause is different networks (for example, one device on 2.4 GHz, another on 5 GHz, if they are separated in names) or a firewall blocking the connection. Also, make sure the signal receiving app is open on the TV.
Does connecting a TV affect internet speed?
Streaming local files (DLNA, Miracast without internet) doesn't drain your internet speed. If you stream online videos (YouTube, Netflix) via Chromecast, the traffic goes through the router, but the load is carried by the TV, not the computer.
How to improve picture quality over a wireless connection?
Use the 5 GHz band and ensure there are no thick walls or microwave ovens between the router and your devices. If the channel is weak, you can try lowering the output resolution in your NVIDIA or AMD graphics settings to improve FPS stability.