At present, LED backlight technology has three main applications in the field of LCD TV: direct-type three primary color RGB-LED light source, direct-lit white LED light source and side-in white LED light source. The direct-lit RGB-LED light source technology is absolutely the first in the comprehensive display advantage, but the price cost is also the highest, and there is no possibility of market popularization. LED TVs currently on the market generally use direct-lit white LED light sources and side-in white LED light sources. Samsung and SONY use side-in white LED technology, while Sharp and Hisense use direct-lit white LED technology.
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Straight down: emphasizes excellent image quality
Enterprises using direct-lit LED technology believe that the advantages of direct-lit LED technology in image control are better than side-in LED technology, and the price of side-in LED TVs is too high. "Compared with the two methods, the 'straight down' is more perfect for the picture quality." Take the 55-inch LED TV as an example. The direct-type product evenly distributes more than 3,000 LED lights behind the panel, making the backlight Evenly conveyed to the entire screen, the details of the picture are more delicate and realistic. In the side-in type, more than 400 LED lights are installed on the frame of the panel to make the light source shine from the side. Although this can minimize the thickness, since the number of LED lamps is reduced by nearly 7 times, it is easy to reduce the brightness of the screen in the form of "X" (that is, the periphery is brighter than the center position).
In addition, the direct-lit LED TV also divides the LED backlight into a number of cells. When the black color is displayed, the light of the corresponding LED area is directly turned off, and a perfect black color can be exhibited. Therefore, companies using direct-lit LED technology believe that direct-lit LED backlights can render images more accurately and exhibit excellent color and contrast.
Side-in type: emphasizes ultra-thin energy-saving lead
“Compared with direct-lit backlight technology, the side-entry backlight technology has higher requirements for the overall system design and integration capabilities of the enterprise. In addition, from the perspective of manufacturing cost, the side-in-white LED technology should consider the whole machine (host The need for light and thin power, circuit, screen power and heat dissipation, etc., often results in increased costs in many aspects, so the overall cost of the machine is higher than that of direct-lit white LED products.†Samsung TV technicians explained this to the price.
The slimmer size has become the biggest highlight of the side-entry LED TV. According to the reporter's understanding, the thinnest product thickness of the side-entry LED TV on the market is only 2.99cm, while the thinnest product thickness of the direct-lit LED is 5.5cm.
Is it important that "thinness" is important? Some experts in the home appliance industry said that consumers care more about the "light and thin" characteristics of electronic products, because this is an obvious improvement in product quality. It is the ultimate visual representation of a brand and enterprise R&D capability and manufacturing technology. Every inch of product appearance is reduced. It means the improvement of technology. In addition, side-mounted LED TVs are relatively more energy efficient. Taking a 52-inch LED TV as an example, the power consumption of the side-in LED is only 186.5W, while the power consumption of the direct-lit LED is up to 304W.
The overall difference is not big
Whether it is straight down or good in side entry seems to be a solution.
An LED technology test conducted by the National Radio and Television Product Quality Supervision and Inspection Center gave an interesting answer. "We conducted a comprehensive test comparison of the brightness and chromaticity parameters of the same brand side-entry LED TV and direct-lit LED TV. From the results, the direct-lit and side-in LED TVs in the screen color performance, brightness The three parameters of uniformity and contrast are slightly different, but the overall difference is not large.†Wenna, a doctor of the National Radio and TV Product Quality Supervision and Inspection Center.
For the development of LED backlight technology, some insiders believe that “there is a long way to goâ€. After all, consumers have just touched the new word “LED†and have not understood its true meaning and advantages. "Since the second half of this year, many manufacturers have launched their own brand of LED TVs. LED is the future development direction, LED will have a very good prospect, and as a consumer, calmly treat various comments, do not follow the trend, look at the start I don’t know how to make a thorough purchase.
Brief comparison of the advantages and disadvantages of the two technical methods
Advantage
Straight down, the picture quality is more perfect, the thickness is difficult to achieve ultra-thin
Side-in type, ultra-thin thickness, energy saving, screen brightness, "X" shape reduction
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