Recently, the Color Research Institute at Tsinghua University’s Art and Science Research Center conducted a comparative analysis of the home appliance sector. Utilizing the THOUSLITE FS spectral illuminometer, they examined the screen color performance of quantum dot LCD TVs versus standard LCD TVs. The findings indicate that quantum dot LCD TVs do not offer any significant advantages over regular LCD TVs when it comes to brightness or chroma purity. Despite the hype surrounding quantum dot TVs, rigorous scientific experiments reveal that their appeal may be overstated.
Over the years, considerable effort has been invested into enhancing the image quality of LCD TVs. To boost color performance, developers focused on backlight technology, introducing both wide color gamut backlights and quantum dot backlights. These innovations utilized red and green phosphors or quantum dot materials to expand the color range of LCD TVs, significantly improving their color gamut. However, these advancements failed to address issues related to color consistency, meaning the primary colors—red, green, and blue—still don’t achieve optimal wavelengths (700nm, 546.1nm, and 435.8nm). Consequently, even with an expanded color gamut, the overall performance of the screen remains compromised.
According to Liu Buchen, a seasoned home appliance expert, what's commonly referred to as "quantum dot TV" on today’s market should technically be termed "quantum dot backlight LCD TV." The core principle of quantum dot technology in display applications involves exciting quantum dot crystals of varying sizes with a pure blue LED light source. This process releases pure red and green photons, leaving the remaining pure blue light to project through the imaging system. As a major advocate of domestic quantum dot TVs, TCL has defined quantum dot TVs as the best backlight technology for LCDs, emphasizing that quantum dot TVs are fundamentally based on LCD panels.
In essence, quantum dot technology is just another color gamut enhancement method, akin to RGB LEDs or wide color gamut CCFLs. It makes LCD TVs appear more vibrant, but beyond that, there’s little difference. Moreover, the true quantum dot TV would be electroluminescent. Currently, the liquid crystal-backlit models are merely LCD TVs masquerading under the quantum dot concept. According to Professor Peng Xiaogang of Zhejiang University, quantum dot technology will require at least three to five years to reach its ideal state. Given the current sluggishness in LCD TV market innovation, industry experts stress the need for revolutionary technologies to rejuvenate the market and drive LCD advancements.
The rise of "QD TVs" stems from the industry's desperation for new technologies, fueled by aggressive marketing campaigns that positioned them as the next big thing. However, many consumers who purchased these TVs found the experience disappointing, with overly vivid and impure images becoming recurring issues. Experts point out that QD TVs often mix other wavelengths, leading to colors leaning towards yellowish hues. Oversaturated colors and excessive brightness can harm eyesight. While QD TVs may deliver visually striking images, the trade-off is potential health risks. For now, it seems that consumers must differentiate between genuine progress and mere marketing gimmicks.
China’s TV industry has lagged in innovation, prompting some manufacturers to capitalize on consumer desire for novelty. This has resulted in numerous buzzwords like "Quantum TV," flooding the market and creating a false sense of progress. Tsinghua University’s comparative experiments shed light on the reality behind these marketing claims, emphasizing the importance of solid research and development over flashy promotions. While the current quantum dot TVs may be ahead of their time, industry experts remain hopeful about future developments. As academic and industrial recognition grows, the future of TV display technology holds promise for groundbreaking innovations.
For those interested in smart TVs and boxes, platforms like China’s influential smart TV site, Sofa Butler (http://), provide comprehensive resources on TV boxes, smart TVs, and related software, answering queries and fostering discussions within the community.
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