How does a wireless projection TV work?
The screen is divided into two modes.
- Push mode
It is mainly used for video and music projection. After screen projection, the mobile phone can be closed or chat with wechat, and the TV will not stop playing. Play on the phone and watch TV. The most common is the tv button in video apps.
The principle of pushing the screen: The principle is that after the phone and the TV are connected to the same wifi, data is transmitted through the screen projection protocol. (A dedicated channel like Bluetooth). Click the screen button, and the phone begins to search wifi for broadcast services.
When the phone searches for the TV, the phone sends a video address to the TV. When the TV receives the address, it starts playing. After the screen is displayed, the phone can control the TV’s progress, pause, next episode, volume and other commands.
Screen projection protocols include DLNA protocol, airplay push protocol, and Bijie Private protocol (including the above two).
- Mirror mode
It’s a screen on your phone or a screen on your computer; It’s the same screen. Mainly used for mobile PPT, mobile desktop, Eat chicken King Glory and other mobile games; Taobao wechat, wechat, Douyin and other apps with temporary screen function. The screen mirror of Apple phone, the multi-screen interaction of Android phone and the mirror function of the mobile version of Lebo projection screen, all belong to the mirror mode.
Principle: The same depends on the LAN wifi channel, the mobile phone to search for the TV, after the mirror, the mobile phone will continue to take a screenshot is to record the screen. The phone records the screen and sends it to the TV. Super fast over 60 frames per second, the TV received and then displayed, became the same screen function.
The image protocols are miracast, airplay, and Bitplay (BitPlay screen projection, wifi LAN transmission, and also support airplay image).