LED Tube may wish to go hand
LED Display that day to take the miserly tape Hu Yi Hu Yi room is there people who look like girls, Hu Yi to present their understanding, that was his cousin. The girl shook hands with him openly, but asked him to take the teacher. Wu Yi said: “This is the only one Guaner upstairs, then assistant to the director!” Female student’s eyes light up, the teacher left and the right to take a teacher to take him straight Fan Yun screamed. Wu Yi said his cousin was a graduate student of history, and very like English.
To learn a foreign language must have a partner, the English school children called each other to write letters, to dialogue, only to grow. Zizhuyuan side has a “English corner”, they LED Tube may wish to go hand in hand on Sunday to “English Corner” timid cousin to please a small risk to protect her.
Miserly take place rain or shine to faint and the cousin to accompany the “English Corner”, two humble Zuiben tongue began to speak English, but also to participate in the discussion of others. There are several male students love to turn around his cousin, English and good, and very quickly take miserly cold side. Cousin to dinner a few boys offer, saying LED Lighting it was to “Laomo” eat Western food, cousin do not, they surrounded her tugging back and forth. Shouted a small cousin to take over, to brief them on “This is my beyfriend (boyfriend), Wizard Press reporter.” That few people saw them, he said, “flowers inserted in cow dung,” plays a coax away.
Blush and say to take the next fiscal can not keep. Tin Ma Lei cousin cried and said he did not chivalry, and even a woman can not protect, big waste, coy with throw him a white handkerchief, stamped said: “you really do not understand people’s heart!”
Inseparable from the two people. Small risk can not believe how this girl will be as passionate in Yangzhou, will fall in love with him. Before she was demoted to take her little cousin, Wu Yi, said he is not in LED Tube this life but also when the last officer. Translation of several books but also how to break? The value of a man is not only a few cars, but when several products officer. Right was so ironing small risk.
Risk in a small dorm room that day, she finally let him hold his own Yu-yi, and close your eyes and make the kind of film on the starting position. Take the miserly half dead with excitement the moment, holding her shaking actually not upright, his legs have gone soft since the first bones, a splash down kneeling on the ground. Wu Yi pushed open the door this time, saw this scene, rushed forward furious pull cousin, rage against the risk miserly toad wants to eat, dare so rude. Choi has also not forget to take LED Display keep the self-styled Hu Yi Chinese and Western people even say something like a harsh word. He always claimed Chinese usually almost forgot to show his good knowledge of English like the British, casually say their “Very English”; said he is Yangzhou, they learned English, speaks Mandarin Chinese is no color results only written, what is “neutral language,” (neutral language). God knows he would Maqi south of Beijing flavor to even a small risk meat and vegetables complete, a written language did not, and so little to take unforgettable.
bad LED Tube news spread far
Not a nest of grass to eat the small side began LED Display to take social initiative, do not believe Beijing can not find such a big girl with a Heart. Girls love those years scholar is popular, especially the love of what “English boy.” Little won the English take on the book, read up every morning vaginal Shanglin English, Imagi House to read the heart, eyes turn in search of prey were rolling all around. Read a few weeks, or “Linguaphone” First class, first sentence is, “Good morning Good morning”.
Yi Hu morning run happens to be found back in the building passed into the story, especially his eyes off Wu Yi Xue actually read through the contents of a woman’s eyes looked like fire, is widespread. Unconsciously, the small risk with the nickname “the young man to learn English” and “Good cat Ning.” Hu hated to take this meaning miserly, but the bad LED Tube news spread far, and not come back to save the reputation is, simply, “Good Cat Ning” in the end, not to find a good girl to show them not.
Morning Reading this month actually invalid, the final “Good cat rather” do not read, simply take a text book Open up, murmuring like to read non-read (looked eyeball is kept spinning), so learning all the more great. Wu Yi letting hit happens, ultimately, a few jokes ridicule. The Wu Yi can be extra-friendly to him, saying that could help him read English, to him, “Linguaphone” tape or something. Hu has been little sense to take these people at arm’s length, lest he again made fun of people. Wu Yi can be really LED Lighting warm this time. Genuinely miss the small risk, he said in English, you can not read this your stupid and should listen to the British recording. Said a small risk to correct the pronunciation, the way a small laugh at the English teacher to take the original bad man to teach, teach people a taste of China in Shanxi taste even English. Wu Yi, after all majors in college, let a few pointers to take the heart of small bright. He even concluded that the small risk of the college English teacher is the kind of “Cultural Revolution” the former Russian professional teachers, the “Cultural Revolution”LED Tube after no one had to be diverted to teach Russian learn English. Small to take very surprised how so expert Hu Yi? Wu Yi indifference that I do not understand? He then lent the tape to listen to personally guide him to correct pronunciation, the English really so big with small take to grow. Building people are weird, Hu Yi and small to take these two completely different people how to walk a road go up. Take miserly Zhigu English, not to think too much. Wu Yi said that only listen to English taste his mouth Shanxi uncomfortable, but also work hard, help him. Who knows which to give birth to a LED Display romance
fluorescent lighting are LED Tube
The best option : LED Tube
A real option between to fluorescent lighting are LED Lighting.
It contains absolutely no mercury, do not emit UV radiation and are really energy saving, lasting four times as long as fluorescent lamps ..
Characteristics of LED Tube vs. Flourescent tube
Environmental Advantage of LED Tube
Less power consumption
A LED tube consumes only about 30% of the powerand a Flourescent tube needs to produce an equivalent illumination
No poisonous substances in LED tube
Flourescent tubes and CFL tube containt Mercury and argon
Recycling of LED Display is possible
Flourescent tube and CFL light are hazardous waste, can’t be recycled;
LED tube containts valuable raw materiale which can be re-used, for example , Aluminum, PC, etc.
Carbon Dioxide
Led tube saves about 2/3 of the greenhouse gas an Flouresent tube would create more greenhouse gas .
Long life time
LED tube lives about 4 times as long as FL tube, 50,000 hours instead of 10 to 15,000.
LED tube is Directional
While the flourescent tube and conventional light bulb distribute their light all around, LED Tube is directed to an angle of 120°. Luminaries are designed to shade off the non-useful portions.
E.G:
For a tube that illuminates a working area from above, only the fraction of the lamps that hits the working area is useful. All of other lamp is lost – radiated in other directions.
When comparing the lumen, The Flourescent tube needs to produce much more light to achieve the same illumination on a flat surface.
Since in most cases 2/3 of the light of a Flourescent tube is lost that way, an LED Display only needs 1/3 of the lumens to achieve the same illumination.
LCD and LED are 2 different display technology
Pieces of display can also broadcast networking The response speed of a Organic LED Lighting is about 1000 times more than the Lcd monitor .It also can be watched under the stronger brigtness .Use the Led technology ,you even can make a more brightness and ,thinner led display under the temperature -40 degree .
Lcd is a crystal screen ,it is including the TFT ,UFB,TFD ,STN and other types of liquid crystal Screen .
The laptops Lcd monitoer normally use the TFT .TFT the full name is ” Thin Film Transistor “which is an active matrix type liquid crystal display, ,it can set special fluorescent tubes on the back .It can take the initiative on the screen to control each pixel independently.This is also called “active matrix TFT . this can be greatly improved the reaction time.It’s about 80 milliseconds and the reaction time of STN is about 200 milliseconds! Compared with STN, TFT has excellent color saturation, reducing power and higher contrast, under the sun still can watch very clearly, but the drawback is more power and higher cost.
Simply said ,the LCD and LED Tube are 2 different display technology .Lcd is made by the composed of liquid crystal displays But led display is made by the led .Compared to the Lcd , LEDd display have more advantageson the brightness ,view angle ,and refresh rates .
There are 2 ways of using the led , 1.using of LED Display valve, including the lights backsources Led , infrared Leds and the other one is “Led display“,Now in the chinese company ,there are some difference of the led producing procedure between the international company when they produce the led materials .Led display is made by the led .It use the lower voltage driver to scann ,it has some adavantage such as “lower power , low cost, high brigtness ,less fault ,big viewing angle,big distance of view etc .
Compare with the Led display and Lcd montior ,there are some advantage here ,for example ,the brightness ,power cost and refresh rates are all more better then the lcd monitor. Normally LED Tube and LCD power consumption ratio is about 10:1， and higher refresh rate makes the LED have better performance in the video .it can provide the perspective of 160 ° wide and can play the text and characters ,numbers ,color pictures and video informations ;also can broadcaste the signal of TV ,Video ,VCD ,DVD etc .
will be also shorten the LED life
It is estimated that LED Lighting can be used thousand s hours by itself , but it not guarantee the led products also can operat so long time .The wrong operation and processes can be easily “destroy” the led lights. For example, supply current is higher than the approved scale manufacturers,it will be more brigntness , but sustained heat will be also shorten the LED Tube life. Real expert to be on the light-emitting diode LED characteristics of solid-state lighting expertise and engineering skills with full understanding, and meanwhile to have enough creativity.
Led Display,in a general discription , it can be used about 50,000 hours but some manufacturers claim their led can operate more then 100,000 hours .The main problem is sthe way of caculation ,Led is not only a sigle operation,the life . its rated service can not be used the way of conventional lamps calculation to measure.
In fact, when the people test the led’s service life , nobody will always stay there to wait it stop operation .But there are some wayt to caculate the led light’s service way .Why the led serive life is long ? Because it will not get a problem of filament fuse .Led will not stop the operation ,but after a long time . it will gradually degraded . It is predicted that a high-quality LED Tube after 50,000 hours of continuous operation, but also maintain 60% brightness of the initial light intensity .Even the led service life is full ,it also can shine ,but ist is very thinner .if you want make its service life longer , it’s necessary to reduce or completely disperse the heat that generated from LED Display. the thermal energy is the main reason that cause the led stop operation.
Economy and High return on Investment (ROI) LED tube
Economy and High return on Investment (ROI) LED Lighting is expensive, more than 10 times the price then Flourescent tube. A sides of the environmental advantages, LED tube return profits in the following way: Long operation hours where the power saving justify the higher price For example , the Wal-mart is changing all of the Flourescent tubes to cooled areas by LED tubes, ROI in half a year Frequent light switching Flourescent tubes doesn’t like switching, their lifetime declines sharply with frequent switching For example : automatic staircase lights, elevator lights Difficult location where the charge of exchange is substantal ? For example : high ceilings, factory lighting, outdoor advertising lights boxes / billboards etc. LED Tube – intsead of fluorescent tube in future . Since 50 years before ,the fluorescent tubes have carried the bulk of lighting in offices, factories and public buildings. Everyone knows them – and got adjusted to its disadvantages. A little Background of traditional fluorescent tube : Traditional fluorescent tube is low-pressure Mercury vapor discharge lamp which produce by LED Display UV light. The UV light hits the wall of the glass tube which is covered with Phosphor. The phosphor absorb the UV light and transforms it to visible white light sources . The tube needs high voltage to start the discharge, and a devide that limits the current during operation. Most of Flourescent tubes have therefore a ballast and a starter, in new tube these functions can be performed by electronic circuits (more expensive). The Main Disadvantages Of fluorescent Tube : If an Fluorescent tube or CFL breaks, the whole building and its A/C ducts need to be cleaned (recommendation by EPA)Only some of the energy lamps are transformed to light. The rest is heat, UV and an unnatural light spectrum. The LED Tube light is pulsing with the main frequency (50/60Hz). Especially when many tubes are connected to one power line, the light feels uncomfortable and may cause some health problems. In some buildings where there are many flourecsent tubes installed the capacitive and inductive electricity waves will be unsynchronized. For more than 500 tubes, a special power control unit is needed to be correct to deal this problem.. Due to the glass of the tubes breakage and leakage problems.Mor than 5%-10% of defective new fluorescent tubes are considered to be acceptable.. An inductive kick from ballast provides a high voltage pulse to start the Fluorescent tubes. If the tube is frequently switched on and off, Both the energy savings of Fluorescent tubes and CFL’s are very limited. On top of it, the tubes will age LED Display rapidly.
High Brightness LED panel light illumination
In the lighting field, the traditional lighting technology shift LED Display illumination technology offers great opportunities to improve energy efficiency, LED panel light illumination is the most promising technologies that can replace conventional incandescent and compact fluorescent (CFL) and linear fluorescent lamps ( LFL). High Brightness LED Tube illumination both light output, energy efficiency or costs are rapidly improved. For example, less than 4 inches in screen size of mobile device applications and the roadside, stadiums, large display applications, LED lighting / backlight penetration or market share has reached almost 100%. In addition, we expect in the next three to four years, LED panel light 50%. LED panel light illumination more and more applications will require more reliable and energy-efficient technologies and products.
Pingwei Technology to meet different end-use applications and the growth of LED panel light on lighting needs, provide a rich LED panel light program, enabling customers to apply the energy-efficient. LED lighting solutions we have developed as our GreenPoint? Reference design as the power program to meet or exceed the worldwide energy efficiency regulations. Either AC or DC power supply applications, but also whether it is low power, medium power or high power applications, Pingwei Technology offer excellent LED Display driver and programs, such as buildings and general lighting, commercial, industrial, etc. In addition, we a wide range of protection products and solutions, with the LED panel light application protection needs.
In addition, we also supply its energy efficiency programs and core expertise in packaging technology, the use of broad technology and abundant resources to provide LED lighting solutions such as our unique LED panel light-driven power structure, different simulation and dimming technology flyback converters and non-isolated topology, is patent-pending self-bias transistor technology. Pingwei Technology’s strategy is to understand the details of each area of the end product applications to help customers improve system energy efficiency to design more environmentally friendly electronic products. Our goal is to develop optimized application-specific standard products (ASSP), LED Tube for energy efficiency programs, deal with global warming.
Ping Weit technologyLed panel light to ensure the continued introduction of leading-edge products to help customers save energy and electricity, regardless of their application is portable, wireless, computing, lighting or automotive applications. Our LED Lighting? Reference designs cover a variety of applications around the world meet or exceed energy efficiency requirements make the design more energy-efficient system at your fingertips. For example, our 255WATX power GreenPoint? Reference design provides more than 85% of the energy efficiency of our notebook 90W AC – DC (AC-DC) Adapter 115Vac and 230Vac conditions in the energy efficiency higher than 90%.
To help solve the global warming issue has become a global trend. State government has introduced more and more related to planning or incentive program to encourage people in the home and office applications using energy-efficient products, which is using technology to less energy to achieve the same product features. Specifications around the world, including America’s “Energy Star”, European EuPDirective and CodeofConduct, and the Chinese Institute of Standardization (CNIS), etc., for different applications continue to release high-energy efficiency standards for different applications to improve efficiency, reduce standby power and / or improve the power factor.
loop in the lamp in series a PPTC
Series-parallel combination of a giant array of lighting or landscape lights over-current and over temperature protection and conservation programs in the cost of the mutual balance, there are generally two kinds of protection schemes can be used. The first splitter protection: multi-string LED Display that can every branch on the road in series a PPTC were to protect. This approach is that we can achieve accurate protection, not because a slip of the fault caused the lights do not work to protect the reliability. Second, the trunk road protection: This protection is the main loop in the lamp in series a PPTC, to protect the entire lamp. This approach has the advantage of low cost, small footprint.
Furthermore, PPTC can be used as temperature sensors and LED drivers used in conjunction to achieve LED array illumination of thermal protection, in a large array of lighting, because the LED Lighting series of large and structure is more complicated, in practical applications prone to overheating fault location, often not fixed in a particular location, so single overheating detection device is difficult to provide complete thermal protection. PPTC in low resistance under normal and positive temperature coefficient characteristics, can easily be several pieces PPTC series on the thermal protection detection circuit, multi-point thermal control. Multiple PPTC series, and installed in the possible overheating of parts. As the PPTC low resistance, THRM-pin level is 0, the power circuitry. When the lamp somewhere or multiple occurrence of over-temperature failure, THRM Loop 1 or How many pieces PPTC heat, resistance rapidly increased, THRM pin level becomes high, and thus start the LED Tube design of the thermal protection program achieve thermal shutdown or reduction drive overheating. The solution to the overheating protection LED surface light source in terms of cost-effective. Tyco Electronics can provide customers with services related to design and verification.
The Summary of this articl
PPTC Because of its many features and is suitable for LED tube lighting system, over-current and over temperature protection, PTC in the design can be installed in the metal core circuit board or LED cooling plate in order to achieve the best heat conduction, so that more timely PPTC protection and effective. Furthermore, PPTC product packaging forms, customized packages according to customer requirements, flexibility, strong. However, there is no standard thermal protection solutions specifically designed to be combined with practical lamps, and fully verified. Tyco Electronics engineers willing to join with the industry, according to the actual situation on a solution, LED tube lighting system reduces the failure rate and maintenance costs.
As a new green technology illumination Hihg power white Led tube have some advantages such as : Long life , low power , non-maintenance etc .So it will replace the old fluorescent in future in many illumination areas .The long life of the led tube based on the safe working enviroment , As a led illumination ,the main threats of affecting their life is from 2 method .First ,it through the electricity to hurt the Led tube it means, the current on the Led tube is over the Led tube datasheet maximum rated current and including over pression . The second one is too hot and it also can be hurt the Led tube .All of these hurt should be displayed the meterial are broken immediately or broken in a long time after it happened .These will reduce the life of the LED Display .
What make the Led tube broken
What make the Led tube broken ?
There are some reasons as below that can make the LED Lighting broken :
1.The power supply of the Led tube is broken will make the Led tube stop working .
2.The material of Led tueb is broken also will make the Led tube stop working .
Usually The brokenof Led power supply (another word is Led driver ) is from the input curent,if the current is over than the maximum allowed current .It is going to stop working of the led chips that in the LED Tube power supply And capacitors and other passive components breakdown damage occurred. Load short-circuit failure may cause over-current drive circuit, driving circuit may be a short circuit or short circuit damage caused by overheating damage. LED tube device failure itself mainly following situations.
A. Transient over-current events
Transient over-current event is the current flowing through LED LED technology over the data sheet the maximum rated current, which may be due to high current directly from the high voltage may also be indirect, such as transient lightning, switching power supply of the instantaneous state switching noise, power fluctuations caused by over-voltage over-current events. These events are transient, lasting a very short time, usually we call it peak, such as “current spikes”, “voltage spike.” Events caused by transient over-current situation also includes LED power on, or plug in the transient charged over current.
LED lighting for automobiles, ISO7637-2 surge impact load transient throw their normal work is a major threat.
LED subjected to electric shocks after the failure mode is not fixed, but often result in damaged welding wire, shown in Figure 1. This damage is usually transient over-current caused great. In addition to lead solder wire burns out, but also near the welding line may cause damage to other parts, such as sealing materials.
Figure 1: LED burns damage the welding line.
B. Electrostatic Discharge Event
Electrostatic Discharge (ESD) damage is highly integrated semiconductor device manufacturing, transport and application of the most common type of transient overvoltage damage, while the LED Display systems are required to meet the IEC61000-4-2 standard “human body model electrostatic discharge” 8kV contact discharge, in order to prevent electrostatic discharge when the system may lead to failure over electric shock.
LED PN junction array performance will occur or reduce the damage. ESD event the LED chip discharge channel leading to an internal failure, this failure may be only a partial functional damage, serious, permanent damage can lead to LED.
For close to 80% are converted into heat energy LED tube lighting design, the thermal management and thermal protection is their fault a challenge. Theory and practice have proved that, LED tube performance and life with LED’s PN junction operating temperature is closely related. When the LED tube chip junction temperature rise 10 ℃, flux will decay 1%, LED’s life will be reduced by 50%.
Power supply and drive circuit protection
LED tube power supply and drive circuit as easily have suffered electrical shock and short circuit damage, so the design of the drive circuit fault state to fully consider all the protection measures to enhance the reliability of the circuit, thus reducing failure rates. Pingwei Technology LVR series of PTC can be achieved AC over-current and short circuit protection, ROV used for surge protection through electric shock and. POLYZEN series is used for DC power input port, an integrated over-voltage over-current protection devices, LED Tube string in the surface mount series is a load or circuit overcurrent fault protection.
PPTC in LED tube lighting in the over-current and overheat protection
Although many high-end LED driver device gradually integrated over-current, overheating and other protection, but in many occasions, especially in overheating protection, discrete components still need to protect the program as a collaborative program to make lamps with higher reliability and a longer life.
PPTC is the polymer positive temperature thermistor, is a polymer with conductive particles, etc., and after special processing, the conductive particles form chains in the polymer conductive pathway. When the normal operating current through (or components in a normal ambient temperature) when, PPTC was low resistance state. When the circuit by an abnormal over-current (or temperature rise), the high current (or temperature rise) the heat generated by the rapid expansion of the polymer, cut off the conductive particles form conductive network, PPTC showed a high resistance state. When the circuit over-current (over temperature state) ruled out, the polymer cooling, the volume back to normal, in which conductive particles constitute a conductive path again, PPTC it was the initial low resistance state. PPTC’s small size, low cost, can be used repeatedly to achieve the automatic start circuit protection and automatic recovery.
In the LED tube , according to the different lighting applications have different thermal protection mode, usually divided into two types. One way to immediately start the required temperature shutdown protection, such protection is usually applied to road traffic lights. Another way is to start the protection of certain temperature, for reducing current drive, such protection usually used in interior lighting and road lighting.
Pingwei Technology Application for LED tube lighting developed a PolySwitch products. The product temperature of 65 ℃ in the environment can guarantee that under normal 350mA current passed by the environmental temperature exceeds 85 ℃, protection, through rational design, configure, can be adjusted separately in order to shutdown or dark way to protect LED Display.
the largest turn Led Tube
As both sides of Hunan Province, turned the first Led Tube, but also both sides of the country’s largest turn Led Tube, producers, Dongguan City, Huang Xing Electronic Technology Co., Ltd. gave a high face, sending the total, including senior engineers and technical workers, including more than a dozen people arrived at the scene to guide the installation and commissioning.
In light of the full-screen screen before the screen to do a thorough pre-promotion. June 10, after bright screen, clear picture of the screen, a stunning rendering of Zhuzhou city has been highly recognized by the relevant part of the Government, but also got their first highly advertisers. Hunan Party voted to build quality and Media Limited is a smooth bright screen for the screen have made outstanding contributions in the equipment, materials, logistics and so on to give great support. Is located in LED Lighting City, the most prosperous areas of the screen, not only for the prosperity of Zhuzhou economy, boost consumption and stimulate economic growth, contribute to beautification lighting Zhuzhou night, but will become the party’s policy of benefiting Zhuzhou publicity to promote the construction of socialist spiritual civilization new platform. Reportedly, the screen turned to self-Led Tube sides of the new product in full production in 2009 the market has been the largest single block of a project, had to keep the documentary is located in Hohhot, Inner Mongolia, Xinhua Square The two sides turned Led Tube LED Display, the total area of 300 square meters. June 10, the largest turn LED Display officially lit on both sides of the screen a total area of 400 square meters, is located in Zhuzhou City, Hunan Province, Zhuzhou department store roof.
