Technical Data of DC RFI Filter
Rated current of DC EMI Filter: 0.5A~2000A
Features of DC Line Filter
High performance DC filters with exceptional common and differential mode filtering effectfor interference from 10KHz to 30MHz.
FT121D series are two-stage common mode filters
High voltage versions above 250VDC are also available upon request.
Suitable for switch power supply, SPC exchange and other DC electric device.
DC EMI Filter DC EMI Filter,DC RFI Filter,DC Line Filter,DC Noise Filter Jinan Filtemc Electronic Equipment Co., Ltd. , https://www.chinaemifilter.com
Working voltage: 0~250VDC
Various connection types: wire, solder lug, stud
Custom specific versions on request
Analyze the seven major problems of OLED TV
The advantages of OLED technology are excellent contrast, brightness, and high-speed response time, which is a dollar-wide uniformity and angle problem compared to traditional LCD/LED TVs. However, any new technology has some problems in the early stage of commercial use, and OLED TV is no exception. The following are the seven reasons.
Obviously, the emergence of large-screen OLED HDTVs is exciting, and this panel technology with excellent image quality is very likely to become the standard for future flat-panel TVs. After experiencing the Samsung S9C series of curved OLED TVs, well-known media including CNET and consumer reports all indicated that the aircraft has the best picture quality of the current HDTV. The advantages of OLED technology are excellent contrast, brightness, and high-speed response time, which is a dollar-wide uniformity and angle problem compared to traditional LCD/LED TVs.
However, any new technology has some problems in the early stage of commercial use, and OLED TV is no exception. Here are seven reasons:
1. The price is extremely expensive and will not be reduced in the short term.
Even though the Samsung S9C series curved OLED TV was significantly reduced in price when it was officially launched, it still reached as high as 9,000 US dollars (about 55,113 yuan), while the price of the other curved OLED TV LG55EM9800 in the market was ridiculously 15,000 US dollars ( About RMB 91,855 yuan), such a price can not be accepted by Chinese users, and the American people can not afford it.
At present, the 55-inch plasma TV Panasonic TC-P55VT60 with excellent image quality is priced at 2,700 US dollars (about 16,533 yuan), while the best-quality 55-inch LED TV is priced at 2,300 US dollars (about 14084 yuan) The Sony KDL-55W900A has a huge price advantage over the two curved OLED TVs above.
Of course, new technologies always come to the market at high prices, and gradually become cheaper as demand and supply capacity increase. For example, in the year of launch of 4KLED ultra-clear resolution TV, the price has already encountered Waterloo. Therefore, OLED TV will become more approachable on a certain day, especially as more domestic manufacturers join the competition.
But what is slightly worrying is that the current manufacturing thresholds and costs of OLED panels are very high. Not all panel manufacturers can handle them, so it is hard to say when it will become as popular as LEDs, maybe two years? Five years? No one can say no.
2. "Slab" changes to "surface"
The two OLED TVs currently on sale all use curved screen design, which makes the original flat and ultra-thin body look a bit distorted. This so-called "innovation" is not acceptable to all users. From the related comments, this design makes the corner of the screen seem wider than the middle, which is easy to cause visual dispersion, although you can slowly adapt to the curved OLED, but if the budget is not a problem, you may still wait for a flat OLED The appearance of television.
Both Samsung and LG said that flat OLED screens are more expensive to manufacture and will not come soon. Therefore, in the short term, manufacturers will still focus on the "immersive", "immersive", "unique" and other selling points of curved OLED TVs. If you want to experience OLED, you may need to give up the "flat" design.
3. OLED screen "burning screen" hidden danger
Like plasma and previous CRT technology, OLED also has the phenomenon of screen afterimage. Some screen content may stay on the screen for a short time. If it remains static for too long, it may remain forever. Although this phenomenon is not very common in current products, there are hidden dangers.
In fact, LG's OLED display has a residual image phenomenon, which seems to occur after two months of user purchase, for OLED TVs that often display menus at the same location, there is a higher probability. If you have an old OLED screen phone like the Samsung GalaxyS, you may have experienced this problem and some icons will remain on the screen permanently.
As a new technology, there is obviously some uncertainty in OLED TV. Just as Samsung OLED TV has built-in protection circuit for anti-burn screen, you may actually spend a high price of 9,000 dollars to buy one. Products full of uncertainty.