Led Tube Drive Technology Development Trend Analysis
From a technical point of view of the market DC Led Tube light-driven technology needs analysis, high technology, the DC / DC Buck and high-efficiency resonant half-bridge (LLC) + PFC topology and power factor correction ((PFC) + Pulse Width Control (PWM) are two average current mode controller to form the new AC / DC driver IC will appear in a new generation of its vitality.
Technological advances, new technology to create human life. In recent years, global human consensus: the future with green energy-related industries brightest prospects. Led Tube bear the brunt of the lighting industry, will show infinite vitality and infinite mass market. 2009 Led Tube lighting industry in no way affected by the global economic crisis, the Chinese government’s energetic efforts, China Led Tube lighting industry is rapidly take the heat in 2009, became Led Tube light the first year, China Led Tube light chain in this economic crisis the rapid growth and improvement, Led Tube rapid development of next-generation lighting technology, driven Led Tube light of the industrial chain of millions companies thriving.
Led Tube light is a shining star, Led Tube can be made based on diverse, ever-changing lighting and lighting, Led Tube advertising big screen, Led Tube information screens, mobile phones and MP3/MP4 display backlighting and other consumer electronics, notebook computer and LCD-TV display backlight.
Led Tube light source to work, inseparable from the driver IC. This phase of Led Tube Lighting recent trends in terms of drive technology.
Led Tube light of the basic structure
Led Tube light of the basic structure is: Led Tube Light + drive power + metal / plastic structure. Led Tube Led Tube light products related to the brightness, color, life; drive power Led Tube products involving electrical performance and stability, reliability, life; metal / plastic structural products related to Led Tube cooling performance and stylish new, and different of applications.
Led Tube without carbon emission energy efficient light source
Led Tube light source is a new generation of solid light source, Led Tube light as a green, energy saving, energy saving, long life light and the sudden emergence of fourth-generation, broad interest, in full swing rapidly. Led Tube light as the fourth generation of new energy-saving light source at its birth Jibei various types of light source used to do. As the incandescent light only five percent of its luminous efficiency, and Led Tube light-emitting efficiency was almost close to ninety percent. Led Tube light with its high energy, long life, environmentally friendly features of interest become a widespread concern. In recent years high-brightness Led Tube light source because of its manufacturing technology advances, while its production cost and steadily declined, and now almost all of Led Tube light source can be used as a high-brightness, high efficient and energy saving, carbon-free lighting source.
Led Tube light source driver IC needs
The current DC Led Tube light source is a low voltage (VF = 2 3.6V), high current (IF = 200 1500mA) semiconductor devices work, you must provide a constant DC current to the appropriate normal light. Direct current (DC)-driven DC Led Tube light source technology has become more mature, because we use everyday lighting is high-voltage AC power supply (AC100-220V), so the technology must be used to obtain lower step-down voltage, common is a switching power supply step-down, and then alternating current (AC) converted into direct current (DC), then the driver IC can be converted into DC current source to promote Led Tube light shine. Therefore, the DC drive Led Tube light source system application program must be: switching power supply + constant current source. Led Tube must have a certain amount of space inside to accommodate the power supply module, but the E27 standard screw is very limited space, it is difficult placement. Whether through the step-down switching power supply, or other methods, the system will have a certain amount of wear and tear, DC Led Tube in AC, DC conversion between about 8 to 25% of the electricity is loss of efficiency of the system difficult to achieve over 90%. Thereby increasing the power conversion efficiency has been the chip and power supply manufacturers to pursue.
Led Tube light source driver IC Common
Current source driver IC Common Led Tube is borrowed from the universal power supply IC, truly designed for the Led Tube light source driver IC, little, many companies are in the design, estimated that by 2010 there may be a lot to be City . Led Tube light source drive current, low-cost solution is not a safe method of RC Buck to achieve, if the earlier Christmas lights; low-cost drives can also use the CCR and the LDO, which drive current is not large, CCR can only drive below 0.5W Led Tube, such as 0.06W straw hat lamp, LDO regulator method can be driven with 1W of Led Tube, Led Tube light but for the life of disadvantage; DC / DC constant current source may be present One of the best known program.
This Is Your Brain On Technology The Effect Of Technology On Social Interaction
What did people do with their time 20 years ago? How did we ever manage without personal computers, the Internet, cell phones, iPods and 24 hour cable news? The technological landscape is vastly different these days and scientist are wondering just what that means for our brains.
According to research done last year by UCLA scientist Dr. Gary Small, daily doses of technology may be altering the way the brain functions, particularly in social skills. He suggests that all that screen time may weaken the brain circuits involved in face-to-face interactions. He is concerned that fundamental social skills like reading facial expressions during a conversation are being compromised.
Small is particularly concerned about what he calls the digital native, those in their twenties and younger who have been “digitally hard-wired since toddlerhood.” As he explained in an Associated Press article, the digital native runs the risk of being socially awkward and isolated by their inability to interpret non-verbal messages from people. He is afraid this may be particularly true in the classroom that still relies on traditional verbal instruction along with interaction with the teacher and other students.
Small argues his case in his book “iBrain: Surviving the Technological Altercation of the Modern Mind.” He admits that his research about whether or not all this technology is changing brain circuitry is new and ongoing.
Other studies, in fact, have taken the opposite tact by seeing positive outcomes for technology users. A MacArthur Foundation study found that teens feel very connected to each other through online social networking. The study allayed some parents’ fears that teenagers are vulnerable to online predators the more time they spend socially on the Internet. “The study found that most teenagers steer clear of dangerous sites and use the Web only for research or to communicate with established friends,” according to an article in the Austin-American Statesman.
Parents who are too protective and prohibit computer use for their teens may be keeping their kids out of the broader social loop. The study found that teenagers move between the online social world and the face-to-face interactions with relative ease, one building on the other.
Dr. Maryanne Wolf of Tufts University thinks technology may even affect how people learn to read. Technology requires users to gather information quickly, rather than the more methodical and sophisticated methods of comprehending regular reading material. She is studying if this rapid information gathering could be changing the normal brain pathways formed when reading. She is particularly curious about the affect on young children as technology becomes a more integral component of modern classrooms.
As with any new information technology, like 50 years ago with the inclusion of television to the average American home, there will be curiosity and controversy. It is certainly hard to imagine how our brains waited for the morning paper or the evening news to hear what was going on in the world around us. It seems like each generation has a quicker learning curve when it comes to the latest technology. That could just be human nature, or it could be the circuitry of the brain changing and adapting to the technologically saturated world in which we live.
[Top]g For Dummies
Have you heard about 4G but youre unsure if its too much technology for you? Are you worried that its going to be too hard to install, too confusing to operate, and just plain overly complicated? You can relax, because this technology is simple to install and fun to use, even for the most uninformed user. Read on to learn more about what you can expect from the latest mobile Internet service.
This fourth generation of mobile wireless technology is four times faster than the technology offered by cellular phone companies. If youve got a laptop or similar handheld device, you can use the service. Its primarily for Windows, but some Mac users can be accommodated. This telecommunications service allows you to get online anywhere you go in your coverage zone.
Who will benefit from signing up for this new service? The target customer is anyone on the move…which describes almost everyone in todays go-go-go world. It is the first network that delivers broadband speeds in settings outside the home. Previously, youd have to sit at home if you wanted to download a large file, because DSL and cable are wired and stationary. With the mobility and speed capabilities of this new telecommunications technology, however, you can stream a movie onto your laptop while youre in the back of a taxi cab.
4G was intended to make life easier, not more difficult, so its been designed to be uncomplicated and unfussy. As far as installation goes, some new laptops and other handheld devices already have WiMAX chips. (WiMAX is simply the name of the network system that transmits wireless signals between towers.) Otherwise, installation is as simple and painless as plugging in a petite USB modem into the side of your laptop.
How does the coverage zone work? Cities across the country and around the world have 4G coverage, and more metro areas are added each month. But your hotspot is not small like the Wi-Fi hotspots at a cafe. These 4G hotspots are oversized and go on for miles and miles. You can use the service in any city in the network.
What does a download speed of four to six Mbps really signify? In a nutshell, it means that you can download an iTunes album in less than two minutes…in the park, at a game, or on a train. If youve got a penchant for multitasking or you get bored in waiting rooms, this service is right for you. If Google is your passion, 4G is the answer to your prayers. And if you need a hotspot that is always around you, not just at the corner cafe, youll be surprised by how much you can accomplish when youre on the move.
Because of a licensed frequency, WiMAX technology is secure. Its also surprisingly affordable. Typically, when a new service is rolled out, the price is farcically high. Not so with this tech. It compares in price to older services because the engineering is relatively straightforward; there are no cable ditches to dig. Because of its simplicity, it is a network service that is gaining traction around the globe and is here to stay.
[Top]HTC Wildfire Deals The technology that never gets outdated
The smart phone from the mobile giant are loaded with amazing features that make you an efficient worker and the sophisticated looks of the handset enhances your personality. HTC mobile phones have launched its latest innovation in the market the HTC Wildfire. This handset has cutting edge features and stunning looks. The gadget is available with various HTC Wildfire deals that you will find on several web portals and company outlets at pocket friendly rates. A handset is said to be a complete package when it has excellent features and great looks that attract you at the first site.
This handset has both these properties. This master piece works on the latest and the most popular Android OS, v2.1 (clair) and it has a powerful Qualcomm MSM 7225 528 MHz processor that provides a good backup to the functions and applications. With an excellent 5MP camera with video capability, autofocus and LED flash the user gets life like picture quality with a picture size of 2592 x 1944 pixels. the user can get himself updated with the latest news and happenings with the inbuilt HTML browser. The smart phone has a 384 MB RAM; 512 MB ROM and the external memory slot supports a memory space of up to 32GB that gives you a huge space to store your data and files.
Talking about the looks of the handset the gadget has a 3.2 inches TFT capacitive touch screen that supports 16M colors that gives you a great viewing experience and the display features Multi-touch input method Accelerometer sensor for UI auto-rotate, Touch-sensitive controls, Proximity sensor for auto turn-off, Optical track pad, HTC Wildfire deals and Turn-to-mute and lift-to-dim-out a call that enhances the beauty of the handset. The user has the option of running this gadget either on 2G or 3G network, the 3G networking is the latest facility that is provided in this handset, with the help of this the user gets fast internet speed video calling and many upgraded features.
There are many connectivity features in the handset like the EDGE, WLAN, GPRS, Bluetooth and USB with the help of which the user can share data with other devices that have similar features. With the HTML browser the user gets problem free internet access that keeps you connected with your loved ones and keeps you updated with the latest happenings. The handset measures 106.8 x 60.4 x 12 mm and it weights 118g.There are many HTC Wildfire deals in the market that gives you free gifts and incentives with the gadget. Through these deals you can get the handset at pocket friendly rates and you can also save your money. Before buying the deals you must compare them on the internet.
[Top]iPad adopted in teaching activities
Beginning from the fall semester in 2010, some American universities is going to adopt iPad in teaching activities. Insiders said that it is not only a try to promote educational business with high technology, but may also change the traditional teaching and learning method fundamentally. iPad is a touch-screen tablet PC with 9.7 inch screen and 680 gram. It is easy to be taken. It is one of the e-book that made by iPad company with the function of searching internet, sending and receiving e-mail, reading e-book and playing video or audio, etc.
Since iPad have been appeared on the market, college is also thinking what this small-screen but large-function facility can do for students. It is reported that some universities will adopt iPad in teaching activities. The list includes: American Oklahoma State University, Seton Hall University in Pennsylvania, Reed College, George Fox University, North Carolina State University, etc.
Most of the school which is going to carry out experimental plan will provide a free iPad tablet PC for each student. University of Maryland is also plan to buy a batch of them, put the two-year course of “digital culture and creation” into practice with 60 students to arouse students potential of exploiting new technology adequately. Green, the principal of information college item in American Scientific Research Institution, showed great affirmative attitude to the item. He said it is the process of exploring new teaching method; it is a sharing experiment between college and student, textbook publishing industry and e-book manufacturer.
Handy, one of the professors in Oklahoma State University, is in charge of the experimental work. He said their college choosing iPad to assist teaching activities is not to catch the vogue of high technology, but to evaluate whether iPad is good for teaching and learning or not, whether iPad can improve students learning, how iPad blends into students daily life. At the same time, it is going to verify whether iPad can save the cost of textbook, whether students can blend into commercial society well after graduate. Of course, they are also testing the limitation of iPad in teaching. According their plan, Handy said, they will blend iPad into the whole teaching and learning. Such as, student can buy digital textbook and put the whole book into iPad. It can save about $100 cost, but also it is easy to search internet anytime.
In addition, student can convert video to iPad about their course or the presentation files before their class. Handy said it is easy to load e-book or ipad video without heavy schoolbag. What is more important, students can keep closed contact with their classmates and teachers through IM Platform whether in the class or not.
Of course, there are some persons in the American academic field calling in question about the experimental plan. In the 2010 spring semester, Princeton University and George Washington University network got some wrong because of students plentifully using iPad. Whats more, students may play any kinds of game or entertainment when using their iPad which will affect their school work. Experts predict that iPad and other kinds of e-book will play an important role in future education. Such as online teaching. In addition, the influence of teaching method will be more obvious, it will fundamentally change the traditional teaching method and structure of textbook.
[Top]