Projection, interactive smart tablet radiation injury? It’s all rumors!

[Huicong Education Equipment Network] With the progress of the society, the school teaching environment is constantly improving, and many schools have installed information-based teaching equipment such as interactive smart tablets. However, when the teachers cheered for the farewell to the chalky classroom and the curse of the chronic pharyngitis occupational disease, others said that the projector and the interactive smart tablet would radiate radiation harm to the teacher's health, and all kinds of rumors provoked the teachers. Worried about regeneration. Will the new equipment in the classroom affect the health of teachers? Let's take a closer look at the common rumors about the health risks of teaching equipment to teachers.

Projection, interactive smart tablet radiation injury, pregnancy teacher can only use the blackboard? Absurd to the extreme!

The main influence of electronic products on radiation is radiation, and electronic products are emerging one after another. Anti-radiation products are also followed by various kinds of radiation-proof potted plants, radiation-proof mobile phone films, maternity radiation suits, etc., and people have created the world through these dazzling goods. There is the illusion of radiation. In such an illusion, people began to worry about radiation from mobile phones and radiation from computers. It seems that as long as there is light, there is radiation. As a result, when the projection and interactive smart tablet were moved to the classroom, it became a matter of course.

But in terms of cell phone radiation, radiation can be divided into ionizing radiation (Ionizing) and non-ionizing radiation (Non-Ionizing). The former is known to induce cancer, while cell phone radiation belongs to the latter. * US MuscatJE research, SEER and other research have confirmed that mobile phone radiation is harmless, and public concerns about mobile phone radiation are too exaggerated because of ignorance. In fact, sunlight is a strong source of radiation, which is much larger than the leakage of any electrical appliances in the power, not to mention the ultraviolet radiation, which can harm the body's ionizing radiation, but People should not be afraid of the sun, and then hide in the cellar? Therefore, some people joked that "it is better to stick a sunscreen to the mobile phone than to put a radiation protection film on the mobile phone."

Then back to the projection, interactive smart tablet and other teaching equipment, from the following two EMI test data can be seen: the measured interactive smart tablet EIM test data on the market is stable within the safe value, this value is far from At the point of harm to people, teachers do not have to worry about daily teaching. Even for laser projections with slightly higher irradiance values, the radiance is within the red line. Therefore, the "projection, smart tablet radiation injury" that is heard on weekdays, the pregnancy teacher needs to leave the teaching tablet and so on, it is absolutely absurd! This is either a so-called anti-radiation business speculation, or a commercial category competition. However, it is worth noting that the manufacturers of interactive smart tablets are not good at all. Many unnamed manufacturers are holding inferior products and low-cost competition with big brands. As a result, some unqualified tests are inevitable in the classroom, which may threaten the health of teachers. flat. Therefore, relevant departments should be vigilant against low-price competition in the market when purchasing equipment.

Laser projection EMI test data

Interactive smart tablet EIM test data

Projection, interactive smart tablet threatening vision? Don't generalize!

I think that the projection hurts the eye and it is forgiven. Because we know that the advantage of the projection whiteboard is that the size is large enough, at least 80 inches or more, and the price is also cheap. However, due to the lack of black on the white screen, the clarity and color saturation are insufficiently displayed in the classroom of Changguang. Therefore, in order to overcome this, the cinema must turn off the lights to create a black environment. Then let's think about the use scene projected in the classroom: open the projection, close the door, pull the curtains, turn off the lights, and the bright teacher instantly becomes a "small black house." In such an environment, the teacher looked up and greeted the glare from the projection light bulb. He turned to look at the only bright projection screen in the dimly lit classroom. The direct light in the dim environment was "the enemy behind the belly", the teacher's eyes. In such an environment, it is easy to become tired, and it is easy to cause eye diseases in the long run. Although in recent years, many projector manufacturers have started to launch short-focus projections, so that the glare emitted by the projection bulb is no longer direct to the teacher, thus protecting the teacher's eyes to a certain extent. But for students, the dimness of the classroom environment caused by the use of projections is still worrying.

However, if the projection and the interactive smart tablet are confused with the damage of vision, it is a sin. The interactive smart tablet has made a big breakthrough in both the use and the eye protection. The interactive smart tablet is a black background with self-illuminating body, so it has unique advantages in image contrast and sharpness color saturation in natural light environment. It can also be saturated in bright classrooms to ensure that the ambient brightness and display brightness are kept at an appropriate gap. Horizontally, the eyes will obviously feel more comfortable when watching; in addition, the interactive smart tablet can have a viewing angle of 178°, and the screen adds anti-glare processing (to ensure that the screen surface does not reflect due to illumination), even when viewed and operated on the side of the smart tablet. It is also not affected by reflections. What's more interesting is that the interactive smart flat panel of those big brands can automatically adjust the screen brightness according to the change of ambient light, ensuring the appropriate viewing effect for teachers and students. When the teacher performs touch writing, the screen will automatically dim to avoid causing strong stimulation to the teacher's eyes. From these alone, it is not difficult to see that the consideration of the teaching use scene of the interactive smart tablet is more sufficient, and therefore it is also considered more thoughtful for the health protection of teachers and students.

In addition, in 2015, the National Radio and Television Quality Inspection Center published an experimental report on the “blue light” pollution of teaching multimedia display devices. The report shows that the measured "blue light hazard" values ​​of two common informational teaching devices are: interactive smart tablet 0.54W•m-2•sr-1, laser projector 10W•m-2•sr-1, Its international standard of safety is: 100W•m-2•sr-1. It can be seen that although the "hazard value" of the projection and interactive smart tablet is far beyond the warning line, the "hazard value" of the interactive smart tablet is much lower than the projection.

In fact, with the continuous advancement of science and technology, the visual threats that projections bring to students and teachers have gradually eased with the popularity of interactive smart tablets, and people's various concerns are not necessary.

When the teaching equipment enters the classroom, it will be accompanied by students and teachers every day. The health of the equipment will become the primary responsibility of the relevant departments. And education as a country's plan, no matter how difficult it is, the ability to enter the classroom means that it has undergone countless tests, rational thinking, you can avoid unnecessary worry. Of course, the relevant procurement departments should also be alert to the influx of inferior products that are low-cost vicious competition, and teachers should also pay attention to the rational and healthy use of relevant teaching equipment.

Editor in charge: Jia Wei