What are the advantages of an
LED bulb compared to an incandescent or energy-saving lamp? It is estimated that many consumers will say energy saving and durability, but what is the energy saving effect? How durable is the LED light? This question may not be answered by every consumer.
With the ever-increasing demand for LED lamps and the continuous reduction in manufacturing costs, the price of LED lamps is also declining year by year. How should consumers choose LED lamps? What are some of the misunderstandings?
Cost reduced to $1.50 in 2015
With the continuous improvement of living standards and increasing attention to topics such as the energy environment, consumers are increasingly demanding energy-saving, environmentally friendly and healthy and comfortable living. In terms of lighting, the choice of greener, energy-saving and healthy lighting products has become the mainstream of society. LED has become an inevitable trend because of its excellent performance in terms of energy saving, environmental protection, efficiency and longevity. However, the higher price has undoubtedly become a roadblock for the popularity of LED bulbs. However, the production capacity of LED bulbs continues to increase, the demand continues to expand, and manufacturing costs continue to decline. Industry experts estimate that in 2015, LED bulb manufacturing costs will drop to around $1.50. .
According to Zhang Weichao, lighting product marketing manager of NXP Semiconductors (Shanghai) Co., Ltd., the world's most famous LED chip manufacturer, since LED bulbs are composed of chips, LED components, heat sinks and lampshades, manufacturing costs have remained high. The cost of LED components has previously accounted for more than 50% of the total. With the improvement of production efficiency, the cost ratio of the three major components of LED has dropped to 1:1:1. It is expected that the cost of LED products will be reduced to 2011 in 2015. 1/5. By then, the cost per LED bulb will be reduced to $1.50.
Good change energy-saving LED is concerned
According to the reporter's visit to the market, the current price of LED bulbs such as Philips and other first-line brands is about 90 yuan, and the price of third-line products can be as low as 40 yuan. However, compared with the energy-saving lamps sold at the first-line brands of more than ten yuan, the price of LED bulbs is still high. In the interview, some consumers said that they had long wanted to replace the LED bulbs for the whole family. If the price can be reduced to the current price level of energy-saving lamps, there is no room to consider.
In addition to energy saving and environmental protection, LED lights have many "special functions". Zhang Weichao said that LED can adjust color and brightness according to demand. For example, you can change the light of the bedroom with light yellow, sometimes green apple green, sometimes pink... This is undoubtedly the unmatched energy-saving lamp. In addition, due to the built-in control chip of the LED, the consumer can even realize the lighting operation of the wireless remote control home, and open the living room lamp before going home. You only need to send one command, and this life experience is not far away. Some people in the industry laughed that after the popularity of LED lights, it will give birth to a new career for designers of home lighting atmosphere.
LED lights purchase common sense and misunderstanding
1. Please list some misunderstandings that consumers will encounter when purchasing LED lights on a daily basis.
When buying lights in some lighting cities, some shopkeepers will tell consumers: "Buy this light, this light has 3 LEDs, there is only one, buy 3 more bright" "3 LEDs of course It’s more expensive than one.†But it’s not. Due to the different technologies used in LED chips, the luminous efficiency of individual LEDs is also very different. At present, LED chips in the mainstream market have many different forms such as high power, medium power, low power, and COB . For example, a single-lumen output of a medium-power LED is about 45 lm, and a single lumen with a high power can reach 120 lm or more, so it is very likely that the luminous effect of one LED is the same as that of three. In terms of cost, the price of a high-power chip is higher than that of a medium-power chip. Therefore, not necessarily three LEDs are necessarily more expensive than one. It is mainly determined by the performance of the selected parts.
2, please list some consumer misunderstandings about LED lights
Most ordinary consumers use the oldest method of purchasing 40 lights and 60 incandescent lamps when purchasing lamps. The brighter the lamp, the higher the wattage. Ask a simple question, a 7W LED, and an 8W LED. Which one do you think is brighter? The answer is: not necessarily.
In fact, the light and darkness of light is measured by a professional parameter called lumen (lm), which is the main criterion for measuring the brightness and darkness of a lamp. Comparing 7W or 8W LEDs, you should see their lumen output. Because the technology of LED and the technology of incandescent lamp are different, the technology of incandescent lamp has been fully mature and stable after hundreds of years of experience, and LED is constantly changing and can achieve different effects through different combinations. Therefore, it is very likely that the 7W lumen output is 8W higher, then the 7W lamp is actually more energy efficient than the 8W.
Of course, since most consumers are unfamiliar with the terminology of lm, some manufacturers will give a label similar to “40W incandescent replacement product†on the packaging to help consumers buy. To give a simple example, an ordinary 40W incandescent lamp has an initial luminous efficacy of about 380 lm, which gradually decreases with the extension of its service life. While LEDs are a replacement for incandescent lamps, the standard for measuring whether they can replace 40W incandescent lamps is whether they reach 350 lm or more. In the future, with the introduction of national standards, perhaps the packaging of LED bulbs will be marked with lumens instead of wattage.
3. Compared with traditional energy-saving lamps and incandescent lamps, LED has many advantages. Does the LED lamp also have some shortcomings, in addition to the current shortcomings?
Everyone knows that the light emitted by LEDs is heat-free. Therefore, no excess heat is generated for the object being illuminated and the indoor environment. But the LED itself is extremely afraid of heat. For every 10°C increase in operating temperature of electronic components, the lifetime is reduced by half. Therefore, for LED manufacturers, how to control heat dissipation within a reasonable cost range is also a major difficulty that manufacturers need to overcome.
4G CAT4 CPE
LTE CAT4/CAT6 Definition
The full name of LTE CAT is LTE UE-category, which is broken down to explain :LTE refers to 4G LTE network, UE refers to user equipment, and Category is translated as level. Smooth interpretation is the level of 4G LTE network transmission rate that user devices can support, which can also be said to be a technical standard for 4G network speed. Therefore, LTE CAT4/CAT6 means that the user device LTE network access capability level is 4 or 6.
Since the level is different, then its capabilities are certainly not the same, let's take a look at LTE CAT4/CAT6 affect what performance, respectively, what level. Simply put, LTE CAT affects the upper limit of 4G LTE uplink and downlink network speed, which is generally referred to as the maximum upload and download speed that a user device can achieve.
There are not only 4 and 6 levels in LTE CAT, but the table above is our list of currently known LTE CAT levels and the corresponding maximum transmission speed. Among them, LTE CAT4/CAT6 is also the current network transmission technology level of 4G mobile phones, while the faster CAT7 and CAT8 are still in the laboratory stage and have not been commercially developed.
Phones and chips that support LTE CAT4/CAT6
As far as the current 4G mobile phone market is concerned, most mobile phone products are CAT4 technology, and only a small number of new mobile phones use CAT6 technology, such as Huawei Honor 6, Samsung Galaxy S5 advanced version and LG G3 Cat6, and the concept of LTE CAT6 is proposed by Huawei Honor 6.
For the mobile phone LTE CAT4/CAT6 standard, it is directly linked to the mobile phone chip, or, if you know the processor of the mobile phone, you know which technology the mobile phone uses. For the current 4G mobile phone chips, only Huawei Kirin 920 and Qualcomm Snapdragon 805 processors for LTE CAT6, before this 4G chips are LTE CAT4, the future and Kirin 930, Qualcomm Snapdragon 808/810 will support LTE CAT6. Mediatek won't have LTE CAT6 chips until the second half of next year.
Qualcomm Snapdragon 805, 808, and 810 also support LTE CAT6
It is worth mentioning here that Qualcomm Snapdragon 805 and Kirin 920 are not the same in chip design, the LTE CAT6 baseband of Snapdragon 805 is an external Gobi MDM9x35, while Kirin 920 is a direct SoC integration, and the chip is integrated, this point Kirin 920 has ultra-high integration. It has certain advantages in power consumption and cost. As a leading international communications company, Huawei's strength can not be underestimated, but also the pride of our people.
The actual use value of LTE CAT6
Upload, download speed is our use of mobile Internet access the most concerned performance, but it should be clear that the LTECAT standard is the 4G transmission speed limit, and can not improve the transmission speed, in the operator's 4G network speed has not reached the next standard, simply raising the limit is meaningless. At present, the 4G networks of domestic operators are all LTE CAT4 standards, and the peak download speed is 150Mbps, but it is difficult to reach the upper limit of LTE CAT4 in practical applications, and even to reach 100Mbps is very difficult, so at this stage LTE CAT6 has no use value.
In terms of real life applications, LTE CAT6 is not as beautiful as we think. We can do a calculation, according to the formula 1MB/s=8Mbps, the maximum download speed of LTE CAT4 is 18.75MB/s, such a download speed, for 1080P video online playback has no pressure, even 4K online film source still can not occupy such a large bandwidth, So LTE CAT6 has no use either.
To sum up, LTE CAT6 does not have much use value at this stage, and the term is only a gimmick of manufacturers, until the operator 4G standard reaches LTE CAT6, I believe that LTE CAT6 equipment has long been popular. So as for whether the phone is LTE CAT4 or LTE CAT6, you don't have to care.
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