In recent years, children's smart watches have become popular because they touched the pain points of parents, but as with other children's electronic products, the issue of children's watch radiation has also been constantly debated. What is radiation? Is radiation really so damaging? Today, let ZTE's ultra-low-radiation ZTE intelligent children's smart watch lead you to unveil the true face of radiation.
What exactly is radiation?
Radiation refers to the outward diffusion of energy in the form of electromagnetic waves or particles (such as alpha particles, beta particles, etc.). All objects in nature, as long as the temperature is above zero in absolute temperature, are constantly transmitting heat in the form of electromagnetic waves and particles. This way of transmitting energy is called radiation. Radiation itself is a neutral word.
However, people nowadays talk about radiation as a matter of course. This, of course, is inseparable from the media coverage of radiation hazards. At present, people's perception is that the daily use of life appliances: computers, televisions, refrigerators, microwave ovens, etc., the daily use of electronic equipment, mobile communications equipment, as long as they are in use, have radiation. When it comes to hazards, it must be related to the amount of radiation that people are exposed to. According to the 2007 Recommendation of the International Commission on Radiological Protection, the cumulative annual public exposure does not exceed 1,000 microsieverts (equivalent to five doses of X-rays). Exceeding this safety limit will jeopardize physical health. The electronic product, as long as it is a qualified product that has been purchased through formal channels and has undergone radiation monitoring, pays attention to the operation method and maintains a certain distance during use, and the amount of radiation emitted by it is insufficient to cause harm to the human body.
How to correctly view children's wristwatch radiation
Although a small amount of radiation will not cause damage to the human body, parents who are “more likely to suffer†will never let any potential threat harm their children. Out of the meticulous care of the children, ZTE Yidu has strict quality control over product radiation, strives for excellence on the basis of national standards, and does its best to minimize radiation.
First of all, the CDMA network is used by ZTE's Yidu children's smart watches. Compared to the GSM network using pulse signals, the instantaneous power and radiation of the CDMA network are much smaller. Second, the ZTE Yiduo Children Smart Watch has undergone rigorous radiation testing. It is understood that the ZTE Yiduo Children Smart Watch has been certified by the Swiss General Public Notary (SGS). The SAR value is 0.192 (W/KG), which is far lower than other brands on the market. (The so-called SAR value, that is, the radiation absorption rate of human brain soft tissue, the national standard is 2W/KG, and the smart brand children's watches on the market are generally 0.3-0.7W/KG). In addition, the radiation of ZTE's children's smart watches has also been certified by the US FCC and European CE.
Resistive Touch Screen
The outermost layer of resistance screens is usually a soft screen that connects the internal contacts up and down by pressing. The inner layer contains the oxidized metal of the physical material, namely N-type oxide semiconductor (indium oxide), also known as indium oxide, with an optical transmittance of 80% and the upper and lower layers separated by the middle. ITO is the main material used in both resistive and capacitive touch screens. Their working surface is the ITO coating. The outer layer is pressed by fingertips or any object to make the surface film concave and deformed. According to the leading line number of screen, divide again have 4 line, 5 line and much line, threshold is low, cost is opposite cheap, advantage is not affected by dust, temperature, humidity. Disadvantages are also obvious, the outer screen film is easy to scratch, can not use sharp objects to touch the surface. In general, multi-touch control is not allowed, that is, it can only support a single point. If two or more contacts are pressed at the same time, they cannot be recognized and accurate coordinates can be found. To enlarge a picture on the resistance screen, you can only click "+" several times to make the picture be enlarged step by step. This is the basic technical principle of the resistance screen.
Control by pressure induction. When a finger touches the screen, the two conductive layers are in contact at the touch point and the resistance changes. A signal is generated in both X and Y directions and transmitted to the touch screen controller. The controller detects the contact and calculates the position of (X, Y), then works according to the simulated mouse mode. Resistive touch screen is not afraid of dust, water and dirt, and can work in harsh environments. But because the outer layer of the composite film is made of plastic material, its anti-explosion property is poor, and its service life is affected to some extent.
The resistive touch screen is controlled by pressure induction. The surface layer is a layer of plastic and the bottom layer is a layer of glass, which can withstand the interference of harsh environmental factors. However, it has poor hand feel and light transmittance, so it is suitable for wearing gloves and occasions that cannot be touched directly by hand.
Resistive Touchscreen,Resistive Screen,Resistive Touch,Resistive Touch Panel
Tonya Display Limited , https://www.tydisplay.com