White light transmitting composite film layer and preparation method and application thereof

Abstract

The invention belongs to the technical field of light emitting, and relates to a white light transmitting composite film layer. The white light transmitting composite film layer comprises a dielectric layer and an indium plating layer, and the dielectric layer is closer to the white light source relative to the indium plating layer; the dielectric layer is a transparent coating containing 0.5-8% of blue pigment and 0-2% of purple pigment; or the dielectric layer is a transparent plastic film containing 0.5-8% of blue pigment and 0-2% of purple pigment. According to the invention, the special dielectric layer is attached to one side of the indium plating layer by using the color complementing principle in chromatics, so that white light can be transmitted through the composite film layer by layer, and the color temperature value of the transmitted white light is 5200-7200K.

Description

technical field [0001] The invention belongs to the technical field of light emission, and relates to a white light-transmitting composite film layer and a preparation method and application thereof. Background technique [0002] With the development of energy saving, environmental protection and intelligence in the automotive industry, vehicle-mounted luminous wave-transmitting products will become more and more popular, such as luminous grilles, luminous signs, luminous interior and exterior decorations, etc. Luminous grilles and luminous signs require products to emit white light, and some It is also necessary to integrate radar to cooperate with driving. Existing white light-emitting products spray white paint with a specific film thickness on the transparent product, and match it with a backlight base plate that can emit white light. When the light is turned on, the product can see the white light from the front, but when the light is turned off by this method, only the...

AI Technical Summary

Problems solved by technology

Existing white light-emitting products spray white paint with a specific film thickness on the transparent product, and match it with a backlight base plate that can emit white light. When the light is turned on, the product can see the white light from the front, but when the light is turned off by this method, only the light-transmitting area of ​​the product can be seen. It is ordinary white, without the high-grade texture of metal plating silver, which cannot meet the appearance requirements of high-end luminous products

The PVD evaporative indium plating process can meet the requirements of the frontal observation of the product when the light is turned off, and the light-transmitting area of ​​the product has a very good metallic silver color. However, when matched with a backlight that can emit white light, the light-transmitting color is obviously yellow, and the color temperature of the light-transmitting color is below 4500K. , cannot meet the requirements of white light transmission and light color temperature of 5200-7200K

No matter how to adjust the thickness of the PVD indium coating layer, the vacuum degree of the coating film, the position of the tungsten wire of the evaporation source, the number of tungsten wires, and the evaporation parameters of the coating film, etc., it is not enough to make the PVD indium coating layer transparent.

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