Transparent shielding material, transparent conductive shielding screen, flexible transparent conductive film

Transparent shielding materialTransparent conductive shielding screen, flexible transparent conductive film

1、 The observation display window is a type of hole slot in shielding bodies such as chassis that has a large amount of electromagnetic leakage and is difficult to handle. Shielding transparent materials can
Shielding radiation interference and transmitting light, it is the only available observation display holeShielding materialCurrently widely used in radar displays
Digital and image display windows for computer display terminals, printers, radios, spectrometers, precision instruments, electronic shelters, and more
Shielding of the observation window in the shielding room. Understand and master the shielding mechanism, key performance parameters, and
The relevant application technology is crucial for the correct shielding design of display observation holes.

2、 Transparent shielding materials can be roughly divided into the following three categories:

(1) Thin film category:

Metal coated glass: Metal coated glass is made by forming a dense conductive film on the surface of ordinary or tempered glass using processes such as vacuum sputtering,
It has the advantages of high transmittance, no optical distortion, and strong environmental adaptability, and is suitable for various shapes and sizes of display observation windows. It is a shielding device
A type of material with lower cost required in transparent materials.

Organic conductive film: a special process made polyester film with a metal thin film, which has the advantages of being not easily damaged and easy to apply.

(2) Wire mesh type: Metal wire mesh sandwich glass uses hot melt pressing technology to sandwich high-density metal wire mesh that has undergone conductive anti-corrosion treatment
Made of two layers of ordinary glass with high shielding efficiency, it is currently used in high emission power displays such as CRT
More of a material.

(3) Microporous type: Foam metal transparent board is made by using special technology to foam nickel, copper, iron and other metals (with a large number of micropores)
A material with high screen efficiency and low cost among transparent shielding materials, especially suitable for non character image display windows such as observation windows in shelters.

IIIThin film shielding materialIt belongs to a seamless shielding body, and due to its thin thickness, its shielding effectiveness remains constant and does not increase with frequency.
The mesh size of the metal wire mesh in the wire mesh sandwich glass is very high, and the aperture is small (the aperture is much smaller than the electromagnetic wave wavelength that needs to be suppressed), so it has a high
The shielding effectiveness. At low frequencies, its shielding effectiveness is higher, while at high frequencies, the impact of hole leakage increases, resulting in a decrease in its high-frequency shielding effectiveness.

4、 The shielding principle and shielding effectiveness characteristics of foamed metal materials are the same as those of wire mesh sandwich glass. But compared to wire mesh sandwich glass, foam metal
The aperture and thickness are both relatively large, resulting in high light transmittance. Due to its continuous overlapping micropores, it has multiple reflections on electromagnetic waves
The high-frequency shielding efficiency is higher than that of wire mesh sandwich glass.

5、 In addition to selecting appropriate shielding and transparent materials, the shielding design of the display observation window should also be reasonably designed with shielding bodies such as chassis
The installation and connection method is also very important.

Key installation points for shielding transparent materials:

It is necessary to ensure seamless conductive connection between the conductive layer (film, wire mesh or foam metal) and the chassis body;

It is necessary to ensure that the glass is not rigidly connected to the chassis, and buffering measures must be taken.

6、 Transparent conductive shielding wire mesh

Widely used in PDP plasma color TV windows and radar displays, computer display terminals, printers, radios, spectrometers, precision instruments and meters
The numerical and image display windows of the table are shielded, and this material has high transparency and electromagnetic wave shielding, and is easy to ground.

Please refer to the following chart for specific technical indicators and application diagrams:

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