What is a car license plate
A car license plate refers to the sheet material installed at the front and rear of a vehicle, usually made of aluminum, iron sheet, plastic or paper, with the vehicle's registration number, registration area and other information engraved on it.
Material and Application
The license plate is made of materials such as aluminum, iron sheet and plastic, and its surface is engraved with official information such as the vehicle registration number and the code of the region it belongs to. Its function is to identify the identity of vehicles and facilitate traffic management.
Installation location
It is usually installed at designated positions at the front and rear of the vehicle as a legal sign to indicate the vehicle's legal qualification for road use.
The main functions of a car license plate include:
Fix and protect license plates
The license plate is fixed with screws to prevent the license plate from falling off or scraping the vehicle body. At the same time, it serves a certain anti-theft function, avoiding the license plate from being removed easily.
Enhance aesthetics and tidiness
The license plate adopts a uniform design, which makes the installation of license plates more standardized, keeps the appearance of vehicles clean and tidy, and meets the requirements of traffic management.
Assist in vehicle identification and management
Through the vehicle information on the license plate (such as license plate number, color, etc.), the traffic management department can quickly identify the vehicle's identity, facilitating registration, annual inspection and violation handling.
The main functions of a car license plate include:
Fixed license plate
The license plate prevents the license plate from falling off or scraping against the vehicle body through a physical fixed structure, avoiding deformation or damage to the license plate due to jolts or accidents.
Protect license plates
The license plate can reduce physical damage to the license plate from the outside, such as preventing malicious destruction or accidental scratches, and extend the service life of the license plate.
Anti-theft and anti-theft
The regular license plate cannot be easily removed, which can reduce the risk of license plate theft and prevent the vehicle from being unusable due to the loss of the license plate.
Comply with regulatory requirements
According to the "Motor Vehicle License Plate of the People's Republic of China", vehicles must be equipped with license plates, but it is necessary to pay attention to using the fixed devices that comply with the regulations (such as no external lock, no internal lock, etc.), otherwise they may be investigated and dealt with.
The manufacturing principle of automotive license plates mainly consists of three core links: material treatment, anti-counterfeiting technology, and information display.
Materials and Processes
Traditional license plates use aluminum plates as the base material. The internal stress of the metal is removed by heating to ensure flatness, and then reflective film is attached to enhance recognition. The surface of the reflective film adopts a raised triangular structure to reflect light from multiple angles, ensuring that the recognition distance at night can reach 200 meters.
Anti-counterfeiting technology
The current license plates are equipped with 128-bit encrypted graphics composed of 5μm diameter laser dot arrays. Among the counterfeit license plates seized in Guangzhou in 2022, 91.7% were exposed due to the inability to restore micro-engraved characters 0.05mm deep. In some regions, biometric binding technologies are adopted, such as vehicle DNA coating or fingerprint recognition modules.
Information display technology
The numbers are pressed into a raised state by using the principle of movable type printing, and then the surface ink is wiped and dissolved with an organic solvent to expose a white reflective film and form clear numbers. In 2023, Shenzhen piloted carbon fiber composite material license plates weighing only 0.3 kilograms. The built-in RFID chip stores VIN codes, improving the efficiency of accident handling by 70%.
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