"The mobile phone is far away, don't look so close." We often hear parents say this to their children.
So, is it now that the "near" VR glasses will hurt the child's eyes?
Recently, industry experts expressed concerns about VR products on the market, saying that they may cause serious harm to the human eye and even cause blindness, mainly because VR devices will generate stronger blue radiation than ordinary electronic devices.
What is "blue light radiation"?
It is reported that the blue light mentioned here is not a blue visible light line in the ordinary sense, but a short-wave blue light with a wavelength of about 450 nm, which is ubiquitous in all electronic devices with light sources. Short-wave blue light has the characteristics of high energy and strong penetrability, which can penetrate the lens of the eye and cause irreparable damage to the retina. Therefore, the damage of short-wave blue light to the eyesight of the human eye cannot be reversed. The data shows that tens of thousands of people worldwide were blinded by blue radiation in the three years of 2006-2008 alone.
Why is VR blue light radiation stronger?
Traditional electronic devices also have blue light radiation, but because the screen is at a distance from the human eye and is only imaged on the local retina, the situation is not serious under reasonable use. However, the VR technology is different, directly applying the virtual scene to the retina, and the scene is equivalent to zero contact with the human eye. In this mode, the blue radiation will be more special, and the damage to the human eye is more serious and direct. At the same time, the scene created by VR is closed, and the change of light duration and darkness is more harmful to vision.
How to avoid VR blue radiation?
At this stage, it is possible to deal with blue radiation, which is feasible in both hardware and software. In terms of hardware, it can be coated on the surface of the lens to prevent short-wave blue light from entering the human eye. It can also work on the display screen to directly filter out short-wave blue light. On the software side, by adjusting the screen to emit light, the effect of eye protection can also be achieved. However, as the VR market has just started, VR devices have not been applied on a large scale, and related vendors are seldom willing to increase the cost of processing Blu-ray.
Xiao Bian believes that the blue light radiation of VR products is harmful to users. Since the relevant manufacturers want to profit from the production and sales of VR products, they are obliged to solve the hidden dangers of blue light from the source in the production stage. Moreover, when producing VR products, we should not only pay attention to the visual stimulation of the human eye, but also should consider the physiological condition of the user. A good VR product should first be a qualified and healthy product.
At the same time, VR needs to solve the health hazards that are harmful to the human body in order to develop in the future. So go and cherish it!
Elevators play a vital role in people's daily life. Whether it is a commercial office building or a residential building, the elevator goes up and down every day, almost all day long, which is a test of the elevator wiring harness and safety insurance system. In recent years, we have It is learned from the news that many elevators have suffered personal injury accidents, most of which are aging elevators, or problems with the system, resulting in accidents.
Elevator unit Wire Harness structure features:
1. Use 0.2mm round copper single-strand twist, and the insulating layer is wrapped between the insulation and the conductor. When the cable is distorted in the same direction, the flexibility of the cable increases, and the bending function;
2. The cable is added with a cable reinforcement core to withstand mechanical tension. The reinforcement core is made of nylon rope and steel wire rope to increase the tensile strength of the cable;
3. YTF cable uses neoprene sheath to improve the weather resistance and non-flammability of the cable.
Elevator unit wire harness requirements:
1. The cable should hang freely and retract completely before use, and the reinforcing core of the cable should be fixed to accept the tensile force together;
2. Multiple cables should be arranged in rows. In the process of operation, the cables rise and fall, the elevator moves, moves, and bends frequently, requiring flexibility and good bending performance;
3. The cable is placed straight and requires a certain tensile strength;
4. The working environment is oily and fireproof, and the cable is not required to be flame retardant;
5. The outer diameter is required to be small and the weight is light.
In terms of products, we can not only provide you with Elevator Unit Wire Harness, but also other Industrial Cable Assembly, including Laser Welding Equipment Wiring Harness and BMS Acquisition Wire Harness.
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Kable-X Technology (Suzhou) Co., Ltd , https://www.kable-x-tech.com