In the last two or three years, the development of flat-panel TV technology can be described as "fast speed". Of course, there are always some hot spots that are worthy of debate every year, because often the emergence and growth of a new technology is bound to accompany A variety of "new concepts" require consumers to slowly digest.
This article refers to the address: http://
In 2007, people debated who is the mainstream of 720p and 1080p;
In 2008, the focus shifted from 120Hz double speed drive to 240Hz four speed drive;
In 2009, one of the most important terms we focused on was "LED TV."
Among the international first-line brands, Samsung, LG, Sony and Sharp have all launched "LED TVs" this year. What kind of new technology and new concept is this "LED TV"? If you don't want to be fooled by the manufacturers again I have to take a look at the following ten conclusions about the "LED TV" that you must know about the truth.
First, LED TV is not a new type of TV technology
Although many brands directly promote the product in the name of "LED TV", in fact, it is just an ordinary LCD TV to replace the CCFL backlight with an LED backlight. More correct should be called "LED backlight LCD TV". "And not a TV product that fully adopts the principles of the new display technology." For example, the ultra-thin LED TV launched by Samsung this year is actually an LCD TV.
It is worth noting that consumers need to distinguish between LED TVs and OLED TVs. Although the abbreviations differ only by one letter, the latter is a technology that is completely different from LCD TVs. It uses the principle of active illumination and is currently not used in home TV. widely.
Second, the LED backlight is divided into two types of incidence: direct and side-fire
The direct type is also called localdimming or fullarray, which means that the LED lights are evenly distributed on the back of the whole LCD screen, and the light is directly transmitted through the panel. For example, Sony flagship XBR10, Sharp XS1.
The side-fire type is also called edge-lit, which means that the LED lights are only arranged at the edge of the screen, and the light is evenly distributed to the screen through the precisely designed light guide plate. For example, Samsung ultra-thin 7000, 6000, Sony 40ZX1.
Third, the direct-lit LED can present a deeper black level, but it is prone to excessive brightness in the area.
The direct-lit LED can be used with the regional drive technology to illuminate the partition when the picture is displayed. According to the actual picture, if the picture of a certain area is completely black, then this area will not light at all, so that deeper can be achieved. Black effects, such as the Sharp LE700 series. The ordinary CCFL and the side-emitting LED must be always lit, and the black level is definitely not as good as the direct LED.
However, such a regional drive technology also has the disadvantage that if an area is exactly black and black at the same time, and there is a high-bright picture, then the LED of this area is driven to be lit at the same time, then this area The place that should have been a black screen will be brighter than the surrounding black. The more obvious models with such problems can refer to the Toshiba SV670. In addition, Samsung's 8500 actually has such a situation, but it is not so obvious. To solve this problem, unless the LED light is driven to achieve one pixel corresponding to one LED, this is not a realistic idea at present.
Fourth, the side-emitting LED can be made very thin, but the brightness is not easy to be uneven
The biggest feature of side-emitting LEDs is that they can make the TV thin and thin, but the brightness of the screen is prone to unevenness.
For example, when you want to display a full white picture, you will find that the brightness of the surrounding edge is higher, and when you display a full black picture, you will find that the edge is light or gray.
Five, LED backlight can not improve the viewing angle of the LCD
When you watch the LCD TV, stand too high or too low, or stand in a horizontal position, you will notice that the screen color and brightness will be significantly distorted, only you are in front of the screen At that time, you can have vivid and ideal picture effects. With the LED backlight, there is no improvement in the viewing angle of the liquid crystal.
For example, the Samsung 8500 can have a very good black level performance, you can get good results if you sit in front of you, but if you move to a more left or right angle, you will find that the picture quality is still certain. The decline, and many of the friends actually seen will feel that this change is more obvious. Why? Actually, this is because when you are watching in front of you, the picture effect is really good. According to the visual habits of ordinary people, as long as you have seen a better picture, return to the less good picture, eyes. It is very sensitive, your eyes have been "raised".
Sixth, LED backlights are generally more energy efficient
Compared with CCFL, LED backlights are generally more energy efficient. This is a fact. For example, Samsung 46-inch 46B6000, the annual electricity bill is only 18.73 US dollars, and the same Samsung's 46-inch CCFL LCD TV 46B650, the annual electricity bill costs 25.96 US dollars, 28% more than the LED model. In fact, in the above example, the annual electricity bills of the two TVs differ only by $8, and the impact is not very large. For many users, this expenditure is not a big deal.
On the other hand, Panasonic is also a 46-inch plasma P46G10. The annual electricity bill is 60.69 US dollars, which is more than three times that of LED TV. Of course, this is not a big expense for an ordinary family, but From the digital point of view, everyone must admit that LED TV is indeed very power-saving.
Seven, LED backlight is better, but how much better?
LED backlights are a big trend in the future, and we have heard too much about the benefits of LED TVs. Side-emitting LEDs can make TVs thinner and the molding process more sophisticated, but the quality of the images is not as good as direct-lit LEDs. As mentioned earlier, direct-lit LEDs are not perfect.
If a 1080P TV needs to have one pixel corresponding to one LED, then a TV needs 2.1 million LEDs, so that the quality of the TV is perfect. But doing so does not improve the effective utilization of TV, more like a waste. How to balance the relationship between image quality and the number of LEDs used, this problem needs to be solved by future engineers.
Eight, LED TV is currently very expensive
At present, the price of LED TVs on the market is quite high. The average price of an LED TV is $400 more than that of an ordinary LCD TV, and the top LED TV is even more expensive than $2,000.
There is no denying that these high-end machines have excellent performance and picture quality, but how much do you have to pay to enjoy these products in advance? Does it cost a lot to buy the matching performance? In this case, you spend 25% more on the price, but only get a 10% performance boost.
Nine, the first-line brand's flagship LED TV quality can rival the plasma
LCD TVs have been criticized by experts for their image quality and black level performance is not as good as plasma, but today, this view seems to be outdated.
At present, the flagship LED TV products in the first-line brands are already comparable to the plasma, and they are outstanding in terms of color, level and black level details. And LED TVs consume less power than plasma. However, in terms of viewing angle, plasma still has obvious advantages compared with liquid crystal.
Ten, if you do not debug the picture, LED TV and ordinary LCD TV quality are no different
As long as you have money, you can buy the world's most expensive and most technologically advanced LED TV, but if you don't debug the picture, chances are that you can't really enjoy the high-quality picture you expect.
LED Tube Light has quality assurance. All the products are inspected to meet with CE, RoHS standards. Our long-term, strategic, stable partnerships with key component(plug in tube) suppliers ensure our products quality and reliability. Goods must be 100% inspected OK by QC before shipping. We believe that the quality of our products and service will satisfy you. Low power consumption. Lower heating during operation. High CRI, high efficiency, high illumination. Life span up to 30, 000 hours. Well heat management.
2G11 Tubes,12W 2G11 Tubes,18W 2G11 Tubes,25W 2G11 Tubes
SHENZHEN KEHEI LIGHTING TECHNOLOGY CO.LTD , https://www.keheiled.com