“Why is old TV always very heavy? Before the 1960s, TVs were mainly composed of bulky electronic tubes, which caused some old TVs to weigh even 50 pounds. In addition, one of the characteristics of electron tubes is their cathode needs. Heating to a certain extent to emit electrons is very power consuming, and there is still the risk of explosion when used for a long time.Why is it sometimes possible to turn on the TV with an air-conditioning remote control?This is because TVs and air conditioners use infrared signals to transmit command signals as long as they are encoded. , can be opened by the same remote control. Why do many people can hear the noise of the TV current? This is not because the TV is damaged, but the current formed by the vibration of the deflection coil..." The program is not only about the historical truth of the old TV. The author found that it also mentioned the "QD TV" that has been hot for the past two years. The video mentioned that quantum dot-dot TVs, which have recently been known for their ability to significantly increase the color of their screens, are still subject to high prices. Actually, quantum dot TVs are just staged products with quantum tubes or quantum films added. In the end, quantum dots are just one of LCD technology's color gamut enhancements. In addition, studies have shown that blue light at a wavelength of 415 to 455 nm is harmful to vision health, and the quantum blue light peaks at 448.3 nm. For a long time, it leads to dry eyes and even causes eye diseases; in addition, quantum dots themselves are composed of heavy metals such as cadmium and indium. Although manufacturers have always emphasized high levels of safety, there are still theoretically hidden risks to health. Speaking of the problem of containing heavy metals, this is the fact that the composition of the quantum dots is determined. In addition, the main principle of quantum dots used in television is to excite quantum dot crystals of different sizes in a quantum dot fluorescent tube through a pure blue light source, thereby releasing pure red photons and pure green photons, and projecting onto the remaining pure blue light. Like the system, the applied technology principle indicates that they will further exacerbate the divergence of harmful blue light and cause harm to human eyes. The program also mentions that there are more display technologies that can improve the color gamut in the market, and they have better health attributes. The wide color gamut CCFL, RGB-LED, and solid-color technology TVs with color boost comparable to quantum dots are all better choices. The wide color gamut CCFL can reach 92% NTSC. The display using RGB-LED can adjust the white point of the light source by adjusting the brightness of the three colors in the backlight. The backlight can reach more than 80% of the NTSC standard and the brightness is uniform. Achieve a wider color gamut and more accurate color accuracy. Solid-color technology uses light nano-materials to absorb stray light from the backlight, ensuring a wide color gamut while allowing more accurate color representation and more realistic images. They guarantee the user's ease of use, but also have a superior color expression. In today's people's pursuit of a healthy life and the emphasis on sustainable development, it is believed that more and more consumers will make more rational choices after understanding the truth. Health science and technology will also become the major trend of future technological development. Light Stand,Portable Backdrop Stands,Backdrop Stand Kit,Tripod Light Stand Shaoxing Shangyu Kenuo Photographic Equipment Factory , https://www.kernelphoto.com
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Do you know who originally invented TV? Only know when the first color TV is available? When did China start playing color television signals? Recently, a truth-proven publicity program "Truth in the Truth" attracted wide attention from netizens. The program used interesting animations to explain and explain the ten truths in the TV field.