Flat TV: energy saving should be considered from the overall design of the product

At present, China's domestic flat-panel TVs may have more than 30 million units, and at least more than 10 million units per year increments. Domestic color TV consumer market appeared flat TVs to accelerate the replacement of CRT (CRT) TV trends. The relatively high energy consumption of flat-panel TV CRT TV, 29 inch CRT TV working conditions of energy consumption of about 60W or so, while the same size range of 32 inches LCD TV energy consumption is generally more than 100W. More than 40 inches of flat-panel TV's energy consumption is generally 200W ~ 300W, and more than 40 inches has been destined to be the mainstream of future household consumption. In addition to ultra-thin, high-definition, large screen, the future direction of the development of flat-panel TVs will certainly reduce energy development.

In the LCD panel area, major suppliers plan to reduce energy consumption. China's Taiwan region LCD panel business plans to reduce the power consumption by 2007 next year's 1/2, down to in 2007 to 1/3. SHARP, Samsung, LGD, AUO panel suppliers also have similar plans. Panasonic also said that by improving the plasma panel fluorescent lamp luminous efficiency, to reduce energy consumption purposes. According to Panasonic's plan, in 2011 the luminous efficiency of fluorescent lamps increased to 2 times in 2007, power consumption is expected to decline to about 25% in 2007.

In the field, some domestic institutions also combined the whole enterprise of energy saving certification of flat-panel TVs, but it is understood that the certification was limited to the standby power consumption, and simply think the standby power consumption below 3W are energy-saving products. At present, the relevant departments have not yet introduced a formal national or industry standards for flat-panel TV energy efficiency, energy saving certification indicators are also limited to reference when consumers buy.

At present, the most important energy saving technology in the field of flat panel display is to replace CCFL (cold cathode tube) as the backlight of liquid crystal panel by LED (light emitting diode). Experts point out that, in general, the use of LED as a backlight LCD TV than the same size of CCFL to reduce the energy consumption of 30% ~ 50%. Samsung LCD TV, SHARP, SONY, Hitachi and other Japanese and Korean companies using LED technology has been available, Hisense, Konka, TCL and other domestic color TV enterprises have begun to launch similar products.

On the basis of LED technology, local control technology can greatly reduce energy consumption. The so-called local control technology is based on the display image, according to different regions of the backlight to illuminate the parts of the control, not only can reduce power consumption, but also can improve the contrast. Samsung introduced 3 color LED to achieve local control technology, can improve the color reproduction process, the efficiency of the use of light, less power consumption. Compared with the white LED local control technology, power consumption can be reduced by about 50%. Its 46 inch Full HD LCD TV power consumption is only about 80W, while the white LED is about 188W. LGD driver circuit optimization of local control technology, the average power consumption is reduced to 50%, its 47 inch LCD TV power consumption is only 50W, the previous product is 169W. AUO, CMO, Dolby, SHARP and other companies have launched similar technology.

Even now, the widely used CCFL technology can also be improved through technology to reduce power consumption by reducing the number of root, such as the optimization of CCFL internal pressure CCFL improve the luminous efficiency and achieve the purpose of reducing energy consumption; the cascading order improved optical thin film can also achieve the purpose of reducing energy consumption, Sumitomo 3M FINEOPTO, SONY, Toshiba, Tama such companies have technical reserves in this area. Component manufacturers are technically to increase research and development efforts on energy-saving products, such as the Rom IC inverter control recently launched (integrated circuit), the LCD TV power consumption is reduced by about 10%; the new transformer developed by TDK can reduce the core loss of 40%, at the same time cut loss means reducing fever, in order to lower energy consumption. In addition, the use of solar cells can also reduce the power consumption of LCD TV, SHARP launched the use of less than 40W solar cell driven 20 inch LCD TV products.

Of course, such flat-panel TV should be considered from the overall product design, if the LCD panel can improve the design, the panel transmittance of material and technology, can reduce energy consumption by 30%; if the LCD TV based on design considerations of lightweight, energy consumption can be reduced to half. The enterprise can Jina material, IC, panel, supporting components such as flat-panel display technology of energy saving of the link, so as to realize the energy saving machine product. This requires the whole enterprise collaborative upstream suppliers, from the point of view of the whole product design to consider energy conservation issues.

Source: China Electronics News