Do you know who invented the TV? Or when the first color TV was made available? And when did China begin broadcasting color TV signals? Recently, a popular and fact-checked show called "Truth in the Truth" has caught the attention of many netizens. The program uses engaging animations to explain ten truths related to the TV industry in an easy-to-understand way.
For example, why were older TVs so heavy? Until the 1960s, most TVs were built around large vacuum tubes, which made some models weigh up to 50 pounds. Vacuum tubes are also power-hungry and require heating their cathodes to a specific temperature to emit electrons, making them energy-intensive and prone to explosions if used for too long. Have you ever wondered why you can sometimes turn on your TV with an air conditioning remote? It's because both devices use infrared signals to send commands, and if the codes match, they can be controlled by the same remote. And why do some people hear a buzzing sound from their TV? This isn't a sign of damage but rather a result of the deflection coil vibrations creating electrical currents.
The program doesn't just cover the history of old TVs; it also delves into the topic of "QD TVs," which have been gaining popularity over the past few years. Quantum dot TVs are praised for their ability to enhance screen colors significantly, but they remain expensive. Essentially, these TVs are just regular LCD TVs with quantum dots or quantum films added, which are simply a way to improve the color gamut of LCD technology. However, studies have shown that blue light within the range of 415 to 455 nm can be harmful to eye health, and the peak quantum blue light at 448.3 nm can lead to dry eyes and even eye diseases. Additionally, quantum dots are made from heavy metals like cadmium and indium. While manufacturers claim they are safe, there are still potential health risks associated with their use.
It’s worth noting that the composition of quantum dots determines their properties. In TVs, quantum dots work by exciting quantum dot crystals in a quantum dot light source with pure blue light, emitting pure red and green photons that combine with the remaining blue light. This technology could worsen the emission of harmful blue light, posing additional risks to human eyes.
The show also highlights other display technologies that can improve color gamut without the drawbacks of quantum dot TVs. Wide color gamut CCFL, RGB-LED, and solid-color technology TVs offer comparable color enhancement but with better health benefits. Wide color gamut CCFL can reach 92% of the NTSC standard, while RGB-LED adjusts the white balance by controlling the backlight's three primary colors, achieving over 80% of the NTSC standard with uniform brightness. Solid-color technology uses nano-materials to absorb stray light from the backlight, ensuring a wide color gamut and more accurate color representation.
In today's world, where people are increasingly focused on health and sustainability, it’s likely that more consumers will make informed decisions based on facts. Health-conscious technology will undoubtedly become the future trend.
For those interested in smart TVs or boxes, resources like the influential Chinese website, Sofa Butler (http://), provide comprehensive information on TV boxes, smart TVs, and related software. Whether you're looking for answers or updates on the latest trends, this site is a great place to start.
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