When the installation and construction of the security system is basically completed, many monitoring projects will generate multi-line ripples in the screen during debugging after installing the LCD splicing wall screen.Through the unremitting efforts of our company's engineering staff, we finally found the reasons and solutions. The following will be a detailed analysis.

Symptom: the picture has many lines ripple

Cause: static electricity.

Causes of static electricity:

From the microscopic point of view, according to the atomic physics theory, when the material is electrically neutral, it is in the state of electric balance. As a result of the gain and loss of electrons generated by the contact of electrons from different materials, the material loses its electric balance and generates static electricity.

On the macro level, friction between objects generates heat, arouses electron transfer, contacts and separations between objects generate electron transfer, electromagnetic induction causes unbalanced distribution of surface charge, and the combined effect of friction and electromagnetic induction.

Electrostatic voltage is the culprit of electrostatic generation, which is generated by the contact and separation of different kinds of substances.This effect, known as triboelectrification, produces a voltage that depends on the properties of the material against which it is rubbing.In the actual production process, DID liquid crystal splicing display screen is mainly generated by direct and indirect contact between human body and related components.So according to the characteristics of the industry we can do some targeted static preventive measures.