Light-emitting automobile sign convenient for millimeter-wave radar penetration and manufacturing method thereof

Abstract

The invention discloses a light-emitting automobile sign convenient for millimeter-wave radar penetration, which comprises a sign body and a sign base, and is characterized in that the back surface ofthe sign body is connected with the sign base in a sticking or vibration friction welding manner; a UV high-hardness finish paint layer is sprayed on the front surface of the sign body, and a silk-screen printing ink layer, a UV primer layer and a nano inorganic silicon coating are sequentially arranged on the back surface of the sign body; a light-emitting device is further arranged between thesign body and the sign base and comprises a light guide plate and an LED rubber frame, the back face of the light guide plate is installed on the sign base through screws, and the front face of the light guide plate is connected with the LED rubber frame through a buckle. LED lamp beads are arranged on the LED rubber frame, and an LED lamp driving circuit is installed on the sign base and electrically connected with the LED lamp beads through wires. According to the invention, the sign body is irradiated by means of the LED lamp beads installed inside the sign, the lighting effect is good, therequirements of the 77GH millimeter-wave radar for permeability and accuracy are met, and the sign has the metal surface effect.

Description

technical field [0001] The invention relates to the technical field of auto parts, in particular to a light-emitting automobile signboard and a manufacturing method thereof which facilitate the penetration of millimeter-wave radar. Background technique [0002] With the rapid development of automobile intelligence and automatic driving, millimeter-wave radar is used more and more in automobiles. In particular, automobile signs must ensure that radar waves can penetrate and must meet the requirements of radar waves for penetration and accuracy. . [0003] The existing car signs are equipped with indium-plated coatings, which can ensure the penetration of radar waves, but cannot meet the requirements of radar waves for penetration and accuracy. In addition, the car signs with indium coating also have the following problems: 1. Indium is a precious metal, which is expensive, which increases the raw material cost of car signs; Influencing, the thickness of the indium-plated co...

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Problems solved by technology

[0003] The existing car signs are equipped with indium coating, which can ensure the penetration of radar waves, but cannot meet the requirements of radar waves for penetration and accuracy

In addition, the car signs with indium coating also have the following problems: 1. Indium is a precious metal, which is expensive, which increases the raw material cost of car signs; Influencing, the thickness of the indium-plated coating needs to be strictly controlled, so the production process requirements for such automobile signs are very strict; 3. The melting point of indium is low, and it is easy to melt during the injection molding process of automobile signs, so the product qualification rate is low; 3. Car signs are illuminated at night by the reflection of external light sources, such as license plate lights installed on the frame or the afterglow of other lights, but the lighting effects are not ideal

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