The automotive CMS GB15084-2022 standard is about to officially come into effect

ＣＭＳ：Camera　Monitor　System

Automotive electronic rearview mirror refers to adding electronic devices to the rearview mirror of a car, replacing traditional flat rearview mirrors with cameras and displays, to achieve a wider field of view and high-definition image display.

The electronic rearview mirror of the car transmits the real-time road conditions behind the vehicle to the display screen through the camera. The driver can clearly see the vehicles, pedestrians, and obstacles behind through the display screen, avoiding safety hazards caused by blind spots and dead corners. At the same time, electronic rearview mirrors can also have night vision function, providing better night driving assistance.

Compared with traditional flat rearview mirrors, electronic rearview mirrors have significant advantages such as a wider field of view, high-definition image quality, strong anti glare ability, and automatic brightness adjustment. In addition, electronic rearview mirrors can also be linked with other vehicle safety assistance systems (such as reverse radar, dynamic line control, etc.) to provide more comprehensive driving assistance functions.

At present, some high-end car brands have begun to install electronic rearview mirrors, and this technology is gradually becoming popular. However, due to the high cost of electronic rearview mirrors and some technical and regulatory limitations, their popularity is relatively low. In the future, with the development of technology and the reduction of costs, it is believed that electronic rearview mirrors will become the mainstream configuration in the automotive industry.

At present, in the field of automotive electronic rearview mirrors (CMS), some mainstream enterprises and manufacturers include the following:

1. Gentex Corporation: Gentex was the first company to launch electronic rearview mirrors, developing technologies such as Auto Dimming and Full Display Mirror. Gentex's products are widely used in major global automotive brands.

Magna International Inc.: Magna is a large global automotive parts supplier with extensive experience in the field of electronic rearview mirrors. Their products include electronic rearview mirrors and external digital monitoring systems.

3. Ficosa International: Ficosa is a Spanish automotive parts manufacturer and an important participant in the field of electronic rearview mirrors. They offer a variety of electronic rearview mirror products, including digital rearview mirrors and smart rearview mirrors.

4. Valeo: Valeo is a leading global supplier of automotive components and also holds a place in the field of electronic rearview mirrors. The products they offer include digital rearview mirrors and smart rearview mirrors, with high-definition imaging and night vision capabilities.

In addition to the aforementioned companies, there are also other automotive component suppliers and technology companies that are developing and producing electronic rearview mirror products, such as Magna Electronics, Samvardhana Motherson, Panasonic, and others.

It should be noted that the electronic rearview mirror market is gradually maturing, and various enterprises and manufacturers are constantly innovating and launching new technologies to provide products with higher performance and more functions. Therefore, mainstream enterprises and manufacturers in the market may change over time.

In the design of automotive electronic rearview mirrors (CMS), protective diodes (TVS diodes) are used to protect the mirrors from damage caused by overvoltage and overcurrent. Common protective diodes include:

TVS diode (Transient Voltage Suppressor): For example, STMicroelectronics' Yin TVS series, such as 5.0SMD and SM8S series

TVS diode (Transient Voltage Suppressor): For example, Vishay's TVS series, such as SMCJ series and P6KE series

The characteristics of these protective diodes are high reverse breakdown voltage and high withstand current capability, which can quickly respond to situations of excessive voltage and instantly direct the overvoltage to ground to protect other electronic components from damage.

In electronic rearview mirrors, protective diodes are mainly used to prevent damage to electronic components caused by sudden changes in the vehicle's power system or overvoltage events. These protective diodes are typically installed in the electronic rearview mirror circuit, located at the power input or other critical interfaces, to ensure stable operation and long lifespan of the electronic rearview mirror.

The GB+15084-2022 standard will officially come into operation on July 1, 2023,

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