LVDS (Low Voltage Differential Signaling, that is, low voltage differential signaling) interface is an electrical interface standard for high-speed data transmission, and is widely used in electronic equipment such as cameras because of its many advantages.
LVDS interface camera
1. The working principle of LVDS
LVDS interface adopts differential signal transmission mode, that is, each signal line is composed of a pair of reciprocal signal transmission lines. One wire transmits the forward voltage signal and the other wire transmits the reverse voltage signal. This differential transmission method can effectively reduce electromagnetic radiation and suppress common mode noise, and improve the reliability and stability of signal transmission.
Through a pair of transmission lines in reverse of each other, the differential signal is transmitted to the receiving end. LVDS interfaces are driven by low voltage and low current, usually using a constant current source to drive the differential signal line. This driving mode makes the LVDS interface have the characteristics of low power consumption.
2. Advantages of LVDS interface
High-speed transmission capability:
The transmission rate of the LVDS interface is very high, usually reaching hundreds of megahertz or even gigahertz level, which can meet the needs of high-speed data transmission for cameras and other devices.
Low power consumption:
The LVDS interface uses differential signal transmission and operates at a low voltage (usually 1.2V or less), so it consumes less power and helps extend the battery life of the device.
Strong anti-interference ability:
Through differential signal transmission, LVDS interface can effectively suppress common mode noise, improve the anti-interference ability of signal, and ensure the stability and reliability of data transmission.
Good signal integrity:
Differential signal transmission reduces signal reflection and crosstalk, thereby improving signal integrity, which is critical for devices such as cameras that require high-quality data transmission.
Low cost:
LVDS interface adopts twisted pair or flat cable interface, cable wiring is convenient, and the cost is relatively low, which is conducive to reducing the overall cost of the equipment.
Multichannel parallel transmission:
LVDS interface supports multi-channel parallel transmission, which can further improve the bandwidth of data transmission and meet the high bandwidth requirements of cameras and other devices.
3. LVDS interface in the camera application
Hd Video transmission:
Cameras need to transmit high-definition video signals, and the high-speed transmission capability and good signal integrity of the LVDS interface make it ideal for transmitting high-definition video signals.
Low power design:
Cameras typically operate for long periods of time, so low-power design is essential to extend battery life and reduce energy consumption. The low power consumption of the LVDS interface makes it an indispensable interface standard in mobile devices such as cameras.
Strong anti-interference performance:
In complex electromagnetic environments, cameras need to maintain stable performance. LVDS interface has strong anti-interference ability, can effectively suppress the interference of external noise, and ensure that the camera image is more clear and delicate.
Wide compatibility:
LVDS interface as a standard electrical interface, has a wide range of compatibility, through the corresponding interface board, the camera video signal can be converted into different video signal output, such as LVDS to 3G-SDI/6G-SDI/12-SDI/HDMI/ network /USB3.0, and a variety of different types of display equipment connection, Convenient for users to choose and match.
SONY, the world’s top brand, its FCB series of zoom camera modules are also using LVDS interface standards.
In summary, LVDS interface has been widely used in electronic equipment such as cameras by virtue of its high-speed transmission capability, low power consumption, strong anti-interference ability, good signal integrity and simple interface cable and low cost advantages. These advantages make the LVDS interface the preferred interface standard for most cameras.