TCL Accused of Selling Quantum Dot TVs Without Actual Quantum Dots

An anonymous reader quotes a report from Ars Technica, written by Scharon Harding: TCL has come under scrutiny this month after testing that claimed to examine three TCL TVs marketed as quantum dot TVs reportedly showed no trace of quantum dots. [...] Earlier this month, South Korean IT news publication ETNews published a report on testing that seemingly showed three TCL quantum dot TVs, marketed as QD TVs, as not having quantum dots present. Hansol Chemical, a Seoul-headquartered chemicals company, commissioned the testing. SGS, a Geneva-headquartered testing and certification company, and Intertek, a London-headquartered testing and certification company, performed the tests. The models examined were TCL's C755, said to be a quantum dot Mini LED TV, the C655, a purported quantum dot LED (QLED) TV, and the C655 Pro, another QLED. None of those models are sold in the US, but TCL sells various Mini LED and LED TVs in the US that claim to use quantum dots. According to a Google translation, ETNews reported: "According to industry sources on the 5th, the results of tests commissioned by Hansol Chemical to global testing and certification agencies SGS and Intertek showed that indium... and cadmium... were not detected in three TCL QD TV models. Indium and cadmium are essential materials that cannot be omitted in QD implementation." The testing was supposed to detect cadmium if present at a minimum concentration of 0.5 mg per 1 kg, while indium was tested at a minimum detection standard of 2 mg/kg or 5 mg/kg, depending on the testing lab. [...] In response to the results from SGS and Intertek, a TCL representative told ETNews and The Korea Times that TCL is "manufacturing TV sets with QD films supplied by three companies" and that "the amount of quantum dots... in the film may vary depending on the supplier, but it is certain that cadmium is included." TCL also published testing results on May 10 commissioned by Guangdong Region Advanced Materials, one of TCL's quantum dot film suppliers. Interestingly, SGS, one of the companies that found that TCL's TVs lacked quantum dots, performed the tests. This time, SGS detected the presence of cadmium in the TV films at a concentration of 4 mg/kg (an image of the results can be seen via ETNews here). TCL also said that it "confirmed the fluorescent characteristics of QD," per Google's translation, and provided a spectrogram purportedly depicting the presence of quantum dots in its TVs' quantum dot films. [...] TCL obviously has reason to try to push results that show the presence of cadmium. However, some analysts and publications have pointed out that Hansol could have reason to push results claiming the opposite. As mentioned above, Hansol is in the chemical manufacturing and distribution business. It notably does not sell to TCL but does have a customer in TCL rival Samsung. Taking a step back further, Hansol is headquartered in Seoul and is considered a chaebol. TV giants Samsung and LG are also chaebols, and the South Korean government has reported interest in Samsung and LG continuing to be the world's biggest TV companies-titles that are increasingly challenged by Chinese brands. It has previously been reported that the South Korean government urged Samsung and LG to meet with each other to help ensure their leadership. The talks resulted in a partnership between the two companies reportedly centered on counteracting high prices that Samsung was facing for TV components sold by Chinese companies. With this background in mind, Hansol could be viewed as a biased party when it sought testing for TCL quantum dot TVs. "I'm really puzzled by Hansol's results," said Eric Virey, principal displays analyst at Yole Intelligence. "I have a very hard time believing that TCL would go through the troubles of making ... 'fake' QD films without QDs: this would cost almost as much as making a real QD films but without the performance benefits." Ars Technica concludes: "As previously stated, it's possible that TCL is indeed using quantum dots but is using them in a small amount alongside phosphor. If true, the performance may not be as high as it would be with other designs, but it would also mean that TCL's quantum dot TVs aren't bogus. As it stands, the situation could benefit from more, preferably third-party, testing..."

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