Modern technologies have completely changed the way we consume media at home, making content sharing between devices a de facto standard. The question of how to transmit images from a monitor to a TV via WiFi has become a popular one among Smart TV and laptop owners. This allows you to enjoy high-definition movies on a large screen without unnecessary wires or complicated HDMI cable connections.
Wireless screen sharing opens up a huge range of possibilities: from viewing family photos to sharing work presentations or playing demanding games on a powerful PC while displaying images on a 65-inch panel. However, despite its apparent simplicity, pairing devices often involves technical nuances that depend on the operating system, driver versions, and communication protocols supported by your TV model.
In this article, we'll take a detailed look at all available synchronization methods, from built-in Windows operating system features to specialized software. You'll learn how to set up Miracast, use technology DLDNA and solve typical problems with signal delay or poor picture quality.
Technical requirements and equipment preparation
Before setting up, make sure your equipment meets the minimum requirements for stable wireless data transmission. A key requirement is a Wi-Fi module in both your computer and TV. If your desktop PC doesn't have a built-in wireless adapter, you'll need to purchase an external USB dongle or use an Ethernet cable, although the latter may limit the functionality of some protocols.
It's important to understand the difference between simply connecting to the same network and directly transmitting a signal. For most methods, such as Miracast or DLNA, it's crucial that both devices are on the same local network. This means your router must correctly distribute IP addresses and not block data exchange between clients (AP Isolation must be disabled).
⚠️ Attention: When using a guest Wi-Fi network in an office or public place, screen sharing may not be possible due to router security restrictions that isolate devices from each other.
It's also worth checking your operating system version. Windows 10 and Windows 11 have wireless display support built into the kernel, while older versions, such as Windows 7 or 8.1, will require installing additional drivers or using third-party software. Make sure your graphics card drivers (NVIDIA, AMD or Intel) have been updated to the latest version as they contain the necessary codecs to compress the video stream.
Using the built-in Projection feature in Windows
The easiest and fastest way, requiring no additional software, is to use Miracast technology, known in Windows as "Projection." This method allows you to broadcast your desktop image in real time with minimal latency, making it ideal for sharing interfaces or watching videos.
To activate the mode, press the key combination Win + K on the keyboard. The "Connection" sidebar will appear on the right, where the system will begin searching for available wireless displays. If your TV supports the feature, Screen Mirroring (often called "Cast," "Smart View," or "Wireless Display" in the TV menu), it should appear in the list.
After selecting your TV, you may see a connection confirmation message on the screen. Use your remote control to grant access. On some TV models Samsung or LG You must first launch the corresponding application on the TV itself so that it becomes visible for searching.
- 📺 Press the "Source" button on the remote and select "Screen Sharing" or "Miracast".
- 💻 On your computer, open the Action Center and click "Connect."
- 🔗 Wait for your TV's name to appear in the list of devices.
- ✅ Confirm the connection on the TV screen if required.
Once paired, you can control the projection mode using the "Projection" menu. Options include: computer screen only, mirroring (a copy of the screen on the TV), extension (the TV becomes a second monitor), or second screen only (the image on the monitor goes blank).
☑️ Check before connection
Stream media via DLNA and streaming services
If your goal is not to duplicate the entire desktop, but to play specific files (video, music or photos), then the technology DLNA (Digital Living Network Alliance) will be more efficient. It allows media files to be transmitted in their original quality, without burdening the computer's processor with constant video stream compression, as occurs with screen mirroring.
In Windows, this feature is implemented through "Media Streaming." To activate it, go to "Settings" → "Apps" → "Media Playback" → "Media Streaming Settings." Here you will see a list of available devices on the network.
Select your TV from the list and make sure it has access rights. After that, open any video file with a standard player (for example, Windows Media Player or VLC), you'll see the "Cast to Device" button. When you select your TV, playback will begin directly on your TV.
⚠️ Attention: DLNA technology does not support the transmission of system audio (for example, sound from a browser or system notifications), it only works with media files.
The advantage of this method is the ability to control playback (pause, rewind) directly from the TV remote, as the file is buffered by the TV itself. However, the file format must be supported by the TV. If the TV cannot decode the video format (for example, MKV with certain codecs), playback will not begin.
What should I do if my TV can't see the files?
Make sure the network profile is set to "Private Network" and not "Public" in your network settings. Windows blocks device discovery on public networks for security reasons. Also, check that the "Shared Networking Service" service is enabled in the Windows services list (services.msc).
Third-party apps and programs for broadcasting
Built-in Windows tools don't always work perfectly, especially with non-Microsoft-certified TVs. In these cases, third-party utilities come to the rescue, often offering more flexible settings and better compatibility with various brands, such as Sony, Philips or Hisense.
One of the most popular programs is LetsViewThis free app can be installed on both your PC and TV (via the built-in app store or Android TV). It provides a stable connection and allows you to not only mirror your screen but also control your computer from your phone, and vice versa.
Another powerful tool is AirServer or ReflectorThese programs turn your computer into an AirPlay receiver, but can also work in the opposite direction if you install the client on a Smart TV. They're especially useful if you need to stream content from Apple devices to a PC and then to a TV, or if standard Miracast is performing poorly.
| Program | Connection type | Latency | OS support |
|---|---|---|---|
| LetsView | Wi-Fi / LAN | Low | Windows, macOS, Android, iOS |
| AnyDesk / TeamViewer | Internet / LAN | Average | All platforms |
| VLC Media Player | DLNA / Render | Minimum | Windows, Linux, macOS |
| Chrome Browser | Chromecast | Low | Windows, macOS, Linux |
When using third-party software, it's important to pay attention to network load. Some programs use software encoding, which can cause slight image stuttering on a weak Wi-Fi signal. For games or fast-paced videos, it's preferable to use hardware codecs if they're supported by your graphics card and TV.
Broadcasting via Google Chrome browser
If you have a browser installed Google Chrome, you get access to one of the most convenient broadcasting technologies - Chromecast built-inThis method even works on TVs without their own operating system, as long as a Chromecast set-top box is connected or the TV natively supports the Google Cast protocol.
To start broadcasting, open your browser, click the three dots in the upper right corner, and select "Cast." In the menu that opens, you can choose what you want to show: a browser tab, your entire desktop, or a specific media file.
The unique feature of this method is that it's perfectly optimized for web content. If you launch a video in a tab, the browser can only send the video stream link to the TV, and the TV will download it automatically, reducing the load on your computer. This ensures the best picture quality and smooth viewing.
However, if you select "Cast Desktop" mode, the load will be placed on the Wi-Fi channel. In this mode, the browser captures the image, compresses it, and sends data packets to the TV. Quality depends on the wireless network speed and processor power.
⚠️ Attention: When broadcasting a browser tab, audio may not be transmitted by default. Be sure to click the "Share audio" button in the broadcast source selection window if necessary.
Solution and connection optimization
Even with proper setup, users may encounter issues: the image flickers, there's no sound, or the computer simply doesn't recognize the TV. Most often, the cause lies in the router settings or drivers. Make sure the protocol is enabled on the router. UPnP (Universal Plug and Play), which is necessary for automatic detection of devices on the network.
If your connection is unstable, try changing the Wi-Fi channel. Channel overlap with neighboring networks is a common cause of packet loss. Use Wi-Fi analyzer apps on your smartphone to find the least crowded channel and switch the router to it through the admin panel (usually 192.168.0.1 or 192.168.1.1).
You should also check your Windows firewall settings. Sometimes antivirus software or your system firewall blocks incoming Miracast connections. Try temporarily disabling protection or adding an exception for the "Wireless Display" service.
If none of the wireless methods provide acceptable results (for example, for competitive gaming where every millisecond counts), consider using a physical HDMI connection. This is the only solution that guarantees 4K HDR image transmission without compression or latency.
Frequently Asked Questions (FAQ)
Is it possible to transmit an image if the TV is not Smart TV?
Yes, it is possible. For standard TVs, you'll need to purchase an external set-top box, such as a Google Chromecast, Amazon Fire TV Stick, or Android Box. These devices connect to the HDMI port and add Smart TV functionality to the TV, allowing it to stream content over Wi-Fi.
Why is there no sound during the broadcast?
Check the audio output device in Windows. Click the speaker icon in the system tray and select your TV from the list of output devices. If your TV isn't listed, your graphics card drivers may not have installed the HDMI/WiFi audio component.
Does screencasting affect internet speed?
Yes, it does. Streaming high-definition video can consume 10 to 50 Mbps of local traffic. If the bandwidth is limited, page loading speeds on other devices may decrease, but local streaming (Miracast) does not consume internet bandwidth (access to external resources).
How to remove mouse cursor lag while gaming?
It's difficult to completely eliminate latency over Wi-Fi. Try using "Second Screen Only" mode instead of duplicating to reduce the load on your graphics card. Also, make sure your computer is connected to the router via Ethernet cable, not Wi-Fi; this will significantly reduce ping.