What will happen if you conduct a magnet on a computer monitor, a TV screen, a phone display? How to make a demagnetization of the monitor?

An article on how the external magnet affects the screen of the iPhone, smartphone, computer.

The influence of the magnet on the screen of the ELT TV

TV modifications differ from each other. Accordingly, the influence of the magnet on the screen will be different.
Consider the old model of a TV based on an electron-ray tube ( Alt) and the influence of the magnet on the screen, the device on the device.

TV ELT and Magnet. Rainbow distortion of color

What's happening?
When the magnet is brought to the screen of such a TV, an interesting rainbow glow of the screen is observed. The magnet field has the ability to direct the rays that form the image on the screen. With the deviation of the rays behind the magnet, there is an incorrect image.
To better understand the action of the magnet, you should consider what the electron-ray tube of the old TV consists of.
Brief device Alt:

• kinescope, glass hollow flask with pumped air
• cathode
• anode
• flat screen
  

  Brief ELT device

The cathode forms the flow of electrons, or rather an electric current, towards the anode. Electrons, bypassing the anode, directed towards the flat screen, covered with a special composition of phosphor.

The flow of electron flow on the screen makes the latter radiate light. A layer of phosphor, consists of millions of particles, three primary colors called pixels. Colors, red, green and blue, produce a color image.
The magnet brought to the TV screen forms its magnetic field, which affects the current inside Alt, rejects the flow of electrons, preventing it from creating the correct image. Electrons that were supposed to get into the pixels of the same color are displaced, the image deteriorates.
To avoid distortions on the screen, magnet to ELT -based TV. do not do it.
Science goes forward! Modern TVs have a liquid crystal base.

The influence of the magnet on the screen of a liquid crystal TV

Modern TV LCD It works differently than the device Alt.
Screen LCD, covered with a special composition of organic substances. When connecting a TV to the network, that is, under the influence of voltage, liquid crystals change the structure. However, the action of an external magnet, crystals not susceptible.

A liquid crystal -based screen

Given that displays smartphone,computer have a liquid crystal basis, the magnet does not provide No influence On the structure of the screen.
However, if you draw a magnet along the screen of the above devices, there may be mechanical distortions, exactly the same as if, poke the screen with a finger. Therefore, touch, it is better to avoid.

Magnet used in modern gadgets

Modern models of smartphones are sold in comfortable, modern covers with magnetic fasteners. Does influence have a magnet on quality indicators and the work of gadgets?

Smartphone and magnet

The magnet can disable not all the device, but individual elements: sensors, display, drive, speaker.

Sensors and magnet

Some telephone models have blocking sensors and accelerometers that include a surking contact in the design. The contact reacts to the magnet field, respectively, may fail.

Sensor and magnet

In the latest smartphone models, Hercuated Contact not appliedTherefore, the magnet does not affect the operation of the devices.
Flash memory of a smartphone is also not amenable to the influence of the most powerful magnetic field.

Display and magnet

What is the influence of the magnet on Alt-Dear, we described above.
On smartphones with LCD-, TFT- D spray, the magnetic field does not have an influence. Accordingly, the quality of the image, the operation of the screen remains at a high level.

The smartphone display is not affected by the magnet field

Computer disk drive and magnet

In a stationary computer On the hard drive, special magnets are used. These magnets affect the process of editors, reading, information records. Therefore, the field of the outer magnet can negatively affect the magnetic field of the disk, cause great difficulties in the working process, up to the failure of the device. Therefore, the external magnet should not be brought to the hard drive of the computer.

Computer hard drive

Dynamic and magnet

The design of the speaker includes a magnet. In mobile models phonesdeveloping firms Apple, Samsung, LG, Sony There are protective screens that remove the effect of the outer magnet.

Small smartphone

Conclusion: the latest models of gadgets, the above companies, are developed taking into account protection against magnetic exposure.

Video: Monitor and Magnet