"TV sizes are growing to be larger than 30 inches, and the number of TVs is also increasing. However, it's unjust to simply take it for granted that power consumption should increase as the size of TVs grows," said Shigeaki Mizushima, corporate executive director and group general manager of the Corporate Research and Development Group of Sharp Corp. "It is important to keep the power consumption of large TVs as low as that of smaller ones."
He made this statement in his keynote speech on the third day of FPD International 2008. He emphasized the mission of TV manufacturers, repeating the word "justice."
"The TV market will enjoy demand for 250 million sets in 2012, and 80% of them will be LCD TVs," he said. "Therefore, the energy efficiency of TVs is synonymous with that of LCD TVs. Demand for TVs will significantly grow in the Middle East, Oceania and China. But it's just not right that power consumption per TV set is as high as the current level. We should be acting under the banner of energy efficiency."
15 times higher efficiency required to cut CO2 emissions by half
"In 2020, there will be 2.9 billion TVs in use," Mizushima said. "That's about twice as many as there are now. In 2008, 1.6 billion TVs will be in use, and the average TV size will be 21 inches. The annual power consumption per TV set will be 118kW/h if the power consumption per unit is 87W."
"If we assume that there will be three billion TVs with an average size of 40 inches in 2020, the power consumption per unit needs to be 33W to cut CO2 emissions by 30% and 24W to cut them by 50% from the current level," he continued. "Energy use efficiency per unit area has to be 10 and 15 times higher, respectively, to attain those goals, according to our calculation. They are not easy."
Mizushima said that Sharp succeeded in reducing TV power consumption by half in the five years from 2000, citing the following three measures. They are the improvements of (1) backlight efficiency (by adopting LEDs and active area control), (2) power source efficiency (by further reducing the loss, which is currently 10%, and eliminating standby power) and (3) transmittance (by enhancing the value from current 5% to 10%, which is a theoretical value).
The power consumption of the 27-inch Eco TV introduced at the G8 Hokkaido Toyako Summit is 40W or less (See related article). And its average power consumption and annual power consumption are estimated to be 32W and 60kWh or less, respectively.
If 1.22 billion CRT TVs currently being used are replaced by the Eco TVs, the annual power consumption will be reduced by 100 billion kWh, which is equivalent to power generated by 14 power plants.
It would contribute to reducing the annual consumption of oil by 22 million kilolitre (100 million drums), leading to the reduction of CO2 emissions by 34 million tons, which correspond to the amount produced by 2.4 billion trees or the area of 100,000km2, which is equivalent to Korea or Iceland, according to the company.
Mizushima also explained the measures taken to reduce CO2 emitted in the process of TV manufacturing, mentioning various power saving technologies introduced to Sharp's Kameyama Plant.
He concluded his speech saying, "The development will be limited if we adopt only our own technologies. We plan to use new technologies to enhance power saving."