In the current era of rapid technological development, as the core device of home entertainment, the technology of TVs has never stopped iterating and upgrading. From traditional CRT TVs to today's smart large-screen TVs, display technologies have continuously broken through, bringing users increasingly stunning visual enjoyment. In terms of interaction methods, the introduction of Ultra-Wideband (UWB) technology in recent years is quietly triggering a new revolution, bringing a qualitative leap to the operating experience of TVs.
UWB Technology: Opening a New Era of Precise Interaction
UWB, that is, Ultra-Wideband technology, is a new type of wireless communication technology. By directly modulating impulse pulses with very steep rising and falling times, the signal has a bandwidth on the order of GHz. Compared with traditional wireless technologies, UWB has many unique advantages.
Centimeter-level Precise Positioning
The pulse width of UWB is in the nanosecond level, with extremely high time resolution. With the help of algorithms such as TDOA (Time Difference of Arrival), its positioning accuracy can reach the centimeter level, which is far beyond the meter-level positioning accuracy of Bluetooth, Wi-Fi, and other technologies. When this feature is applied to a TV remote control, it can accurately capture the position and orientation of the remote control, achieving an operation experience similar to that of a laser pointer, where you can point to a specific location and perform the corresponding operation. This makes the user's control of the TV more intuitive and accurate.
Strong Anti-interference Ability
The UWB signal disperses weak radio pulse signals and transmits them in a wide frequency band, and the output power is even lower than the noise generated by ordinary devices. The signal energy is restored during reception. This unique signal transmission method makes UWB have stronger anti-interference ability than technologies such as IEEE 802.11a, IEEE 802.11b, and Bluetooth under the same code rate conditions. Even in a complex electromagnetic environment, it can ensure stable and smooth signal transmission between the TV remote control and the TV.
High Bandwidth and Low Power Density
The signal power density of UWB is extremely low, causing minimal interference to other devices. At the same time, its bandwidth is usually above 1GHz, and can reach up to several gigahertz at the highest, enabling its data transmission rate to reach several hundred Mb/s to 1Gb/s. In the application of TVs, on the one hand, it can ensure low-power operation and extend the battery life of the remote control; on the other hand, the high bandwidth can meet the needs of high-speed data transmission. For example, when transmitting high-definition video stream commands, it can respond quickly and avoid lag.
Application Scenarios of UWB Modules in TVs
Revolutionizing the Interaction Mode of Remote Controls
Traditional TV remote controls mostly rely on infrared or Bluetooth technology, and the operation mode is limited to button control, with relatively single functions. The integration of UWB technology brings a new interaction form to the remote control. Take the Lingxi Pointing Remote Control equipped on the Huawei Smart Screen V5 Pro as an example. Through the cooperation between the spatial positioning sensor on the TV and the UWB module on the remote control, and with the imu inertial sensor integrated in the remote control, it can fuse the read imu data and uwb measurement data, and accurately calculate the position and attitude information of the remote control relative to the TV. When the user holds the remote control and points it at the TV screen, a cursor will appear on the screen. Just like operating a computer mouse, the user can easily move the remote control to click, select applications, or perform other complex operations, turning the large TV screen into a "giant-screen mobile phone", greatly expanding the usage scenarios of the TV.
Expanding the Central Control Hub of Smart Homes
In the smart home ecosystem, TVs are expected to become important central control hubs with the help of UWB technology. Limited by technology, traditional remote controls can generally only control a single device. Even a universal remote control needs to record the infrared codes of different devices in advance. However, the precise positioning function of UWB technology enables the TV remote control to break through this limitation. For example, when the user holds the remote control and points it at different smart home devices in the house (such as smart lights, smart speakers, smart curtains, etc.), the remote control can automatically identify and connect to the nearest or pointed device according to the UWB positioning, realizing one-click control. The realization of this function allows users to easily control all the smart devices in the house through the TV remote control without having to switch frequently between the remote controls of multiple devices, significantly improving the convenience and integration of smart home use.
