Recently, a popular public education program called "The Truth in Truth" has caught the attention of netizens with its engaging approach to uncovering facts. The show uses fun animations to explain ten fascinating truths related to the world of television. One question that often comes up is who originally invented the TV? Many might not know that the first color TV became available in the 1920s, but it wasn’t until much later that China began broadcasting color TV signals.
For instance, why does old TV seem so heavy? Before the 1960s, most TVs were built around large vacuum tubes, making them quite hefty—some even weighed over 50 pounds. Additionally, these tubes consume a lot of power due to the need to heat their cathodes to emit electrons, and they also carry a risk of exploding if used for too long. Another curiosity is how sometimes an air conditioner’s remote can turn on a TV. This happens because both devices use infrared signals to send commands, and as long as the encoding matches, the same remote can control both. Also, that buzzing sound you sometimes hear from a TV isn’t necessarily a sign of damage—it’s often caused by vibrations in the deflection coil.
The program also delves into the topic of "QD TVs," which have been trending over the last couple of years. These quantum dot TVs are known for enhancing screen color, but they remain expensive. Essentially, quantum dot TVs are just regular LCDs with quantum dots or films added to improve color gamut. However, studies suggest that blue light wavelengths between 415 to 455 nm can harm vision, and the peak emission of quantum dots at 448.3 nm could contribute to dry eyes and other eye issues. Moreover, quantum dots themselves are made from heavy metals like cadmium and indium, raising potential health concerns despite manufacturers' assurances of safety.
The program points out that quantum dots are inherently tied to heavy metals, which limits their appeal. Furthermore, the way quantum dots work in TVs involves exciting quantum dot crystals with a pure blue light source, releasing pure red and green photons, and combining them with the remaining blue light. This process can actually worsen the harmful effects of blue light on the eyes.
In the market, there are alternative display technologies that offer better health benefits while improving color gamut. Wide color gamut CCFL, RGB-LED, and solid-color TVs all provide excellent color reproduction without the downsides associated with quantum dots. For example, wide color gamut CCFLs can reach up to 92% of the NTSC standard, while RGB-LEDs allow for adjustable white points and a uniform backlight, achieving an impressive color gamut and accurate color representation. Solid-color technology uses nano-materials to filter stray light, ensuring vivid colors and precise image rendering.
As people increasingly prioritize health and sustainability, it's likely that consumers will opt for more informed choices. Health-conscious technology is set to become a major trend in the future. If you’re looking for smart TV or TV box information, platforms like Smart TV/Box Info Network Sofa Butler (http://) offer comprehensive resources on smart TVs, TV boxes, and related software in China.
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