Regarding wireless technology, it is not a new topic, because there are many applications around us. For example, the most common one is the wireless mouse. Its existence greatly facilitates our actual use, and it also guarantees the later use effect and experience advantages to a certain extent. In addition, wireless displays are also products worthy of attention. What I would like to introduce to you today are the purchase suggestions and comprehensive popularization knowledge about wireless displays based on the user’s perspective.
1. Introduction to wireless monitors
Wireless monitors eliminate the need for video signal lines, and the monitor will be easier to place randomly. The process of connecting to a PC or laptop will also become easier, providing users with a better experience.
From a technical perspective, there are currently two ways to display images on the display terminal wirelessly.
The first way is to transmit video data. The way it works is that at the video sending end, the video stream is first compressed and sent wirelessly to the receiving end in the form of data packets. The receiving end reassembles the data packets after receiving them, and then decompresses and restores the image. There are many solutions on the market for this method, and the more representative ones are implemented through WIFI technology or UWB technology.
The second method is to directly transmit the video stream without the need to compress and decompress the video. The access is intuitive, but the technical difficulty is high. The more representative one is WHDI technology
2. Factors for purchasing wireless monitors
1. Image delay
Using UWB and WIFI wireless video technology, since it first compresses the video stream and then transmits it, and finally decompresses and restores it, this process takes time and causes video delay. The direct cause is unavoidable.
Using WHDI wireless video technology, there is no need for compression and restoration, which saves the time of compression and decompression, and can fundamentally solve the problem of delay. However, because the data bandwidth occupied by video streaming is very high, only WHDI technology can be implemented in the wireless field.
2. Transmission distance
One of the main performance measures of wireless is the transmission distance. The transmission distance can be divided into visible transmission distance and occlusion transmission distance. The meaning of visual transmission distance is the receiving distance of the receiving end under the premise that the wireless transmission device can be seen within the user's line of sight.
Although they are all wireless technologies, each one has its own characteristics. UWB technology is a wireless technology with the shortest transmission distance. The straight-line transmission distance is about 5 meters, and the transmission is invalid if blocked. Wireless UWB displays can only transmit over short distances.
WIFI technology, while ensuring the minimum delay and optimal resolution of images, can only transmit 2 to 5 meters. Of course, if you don’t mind using standard definition resolution (480i) for entertainment and office work with up to 1.5 seconds of image delay, I believe its transmission distance of about 30 meters will be much better than UWB.
WHDI technology, the transmission distance is within a range of about 30 meters, the image resolution is as high as 1920*1080, that is, 1080P/60, and the image is fine No delay. This is due to its own uncompressed technical features and advanced MIMO antenna design (4 antennas X 5 antennas).
3. Wireless control
Users who purchase wireless monitors will perform keyboard and mouse operations on the monitor, which is a heavyweight indicator for measuring wireless monitors. Of course, if your wireless display has a touch function, the problem of wireless control will be even more prominent.
UWB technology supports wireless control of keyboard and mouse. But this premise is that the display itself based on UWB technology transmits images without delay to make sense. Similarly, WIFI monitors also face the same problem.
WHDI technology can support wireless control of keyboard and mouse, but unfortunately this technology is only in the hands of a few manufacturers. Not all WHDI products can support keyboard and mouse, so users need to do their homework when choosing similar products.
The above involves not only the text and picture introduction of the comprehensive section of wireless displays, but also takes into account the problems that users may have, such as how to Regarding purchasing appropriate products, etc., we have also listed wireless display purchasing suggestions for your reference. And correspondingly, we can find that wireless displays have many advantages and good development prospects. Moreover, as long as they are purchased and used according to the actual situation, we can ensure that we enjoy excellent results.