Syhdee New Compatible LED Tube Direct Replace Fluorescent Tube Lights

This new Syhdee compatible LED tube lights is compatible with both inductive 

and electronic ballast. Directly replace old fluorescent fixtures, which requires no 

rewire and enables LED light tube retrofit for traditional tube lights to finished in a 

second. With 5,0000h lifespan and and more than 60% energy saving, LED tube 

lights compatible can save you cost a great deal.

Performance: This new compatible LED tube can perform very well. Compatible 

with inductive ballast without removing starter and compatible with electronic 

ballast, this type LED tube adopts the non-isolated power supply of maximum 

electrical current 480mA.

Installation: Easy to install compatible LED tube. No rewiring, no electrician to 

install them! You can simply detach T8 fluorescent tube lights from fixture and 

change it with compatible LED tube. Very easy to get going!

Russian Government Promotes LED Lights Programme

It is reported that Russian Railway Corporation has scheduled to purchase LED lights for retrofit of Russian railway lighting project, observed by Sergey Borovkov, the business partner of Lighting Business Consulting LLC. 

Russian Railway CorporationRZD, one of the largest Russian stated operated purchaser, had planned this LED lights replacement project since 2009. Till now LED lighting for railway station and rail track has been completed already and will be still ongoing.

LED lights fixtures price is 50 times of traditional bulbs as well as15 times of conventional fluorescent tubes. 

It might take a long time for most consumers to select LED lights instead of traditional lighting products. The price of LED lighting fixtures has become the primary consideration. And fortunately, substantial price fall of LED lights products motivated LED lights development. Recently Russian government has carried out a series of measures to promote LED lights project in Russia. As one member of emerging markets, Russia played one important role in economic development. To be brought in line with international standards, Russian government has enacted law of energy strategy outline in 2009, stipulating sales ban of over 100watts bulbs in 2011; of more than 75 watts bulbs in 2013, and of over 25watts in 2014, claiming traditional bulbs withdrawal from the market. Moreover, market capacity of fluorescent tubes in Russia is still huge, while waste recycling issue has become one Gordian knot. In the long run, environmental issues will be the bottleneck of fluorescent tube development. 

In accordance with Analyses of Russian market, LED lighting fixtures market share keeps growing, which accounts for 37% of lighting industry, among which commercial LED lighting, industrial LED lighting, office LED lighting have become the three biggest parts. It is predicted that LED lights, applied in commercial lighting, office lighting, and industrial lighting, shall increase rapidly in demand. 

What is LED Surface Texture

According to Snell’s Law, LEDs luminous efficiency depends on either internal quantum efficiency or light extraction efficiency of each component in one LEDs device, among which LED grain efficiency is the most important direct factor. Total Internal Reflection(TIR) has become the main problem to be solved.

The most common way to solve TIR problem is to change geometrical shape of LED grain. Osram has applied this technique in silicon carbide substrate system, which resulted in improvement on light transmittance. 

Nowadays one core technique to solve TIR issue is LED surface texturing. By means of modulation for LED grain geometrical surface, light refracting angle should be changed. Surface texturing processing is dedicate to altering the beam angle of light that meets the law of TIR. 

And now Wet Etching is one of the methods that has been adopted as the key of realizing surface texturing. 

What is LED Flip Chip

Flip Chip, known as controlled collapse chip connection, short of C4, is the way to interconnect semiconductor devices to external circuitry with solder bumps. The solder bumps are deposited on the chip pads on the upper side of the wafer during the final wafer processing procedure. In order  to mount the chip to external circuitry, by flip chip package, the chip is flipped over so that the chip surface aligned directly with circuit board without wire bonding, and then the solder is reflowed to complete the whole interconnection.

Here is the main processing procedures of LED flip chip package:
1. Firstly, circuit shoud be integrated on the wafer
2. Secondly, the pads should be metalized on the surface of chips
3.And then solder dots are deposited on each of the pads
4.Chips are flipped over and positioned so that the solder balls are facing the    connectors on the external circuitry
5.Solder balls are then remelted by using hot air reflow in the processing6.Mounted chip is under-filled by using an electrically-insulating adhesive

Compared with wire bonding,, the whole processing steps of flip chip package can be completed in batch so as to reduce cost and improve the speed. The resulting completed flip chip assembly is much smaller than a traditional carrier-based system; the chip sits directly on the circuit board, and is much smaller than the carrier both in area and height. The short wires greatly reduce inductance, allowing higher-speed signals, and also conduct heat better.

How to Apply PTC Thermistor in LED Tube Short Circuit Design

The latest discovery that PTC(Positive Temperature Coefficient)，one kind of positive temperature coefficient thermistor, can be applied in LED tube short circuit design.

PTC is one typical semiconductor resistance of temperature sensitiveness. Beyond the Curie Temperature, its resistance value will increase by steps 

LED Tube shortcut circuit design was previously realized by short circuit chip:

                                                   (Picture Courtesy of SYHDEE)

One big disadvantage of which, is that once the wiring mistake occurs, it might cause circuit short-cut and electronic components damage. Replacing short cut chip with PTC can solve this problem:

                                                    (Picture Courtesy of SYHDEE)

PTC should be wired in series in circuit while LED tube works. Under normal circumstances, PTC resistance value is small and so is energy loss, thus affecting little the normal working. Whereas overcurrent happens, temperature of PTC thermistor will rise up rapidly and so does PTC resistance value, automatically setting up overcurrent protection circuit. When faults removes, the power supply will be auto recovered. 

What is SiC Substrate

Similar to silicon substrate, SiC substrate is one kind of chemical materials that is adopted in LED chip. Electrode of SiC-based LED chip is laterial-type and electric current is vertical-flow. SiC substrate is characterized by good electrical conductivity and excellent thermal conduction property, which is conducive to power LED making.

Compared with conventional proven silicon substrate and GaAs substrate, SiC substrate is predominant on work temperature, high voltage withstand and anti-radiation and has become the most mature wide band-gap semi-conductor with the advantages of high heat conductivity, high breakdown stress and high saturation electronic drift velocity. It can meet the new requirements for high temperature, high frequency, high power, high voltage pressure and radioresistance that modern electronics techniques bring up nowadays. Therefore, SiC substrate is regarded as one of the most promising optical materials. Moreover, since SiC and GaN are well-matched on lattice and thermal dilatation, SiC substrate has become an optimal material for super brightness GaN semiconductor.

The heat conductivity of SiC substrate is tenfold higher than sapphire substrate. Sapphire substrate is one substance that can conduct electricity well but heat poorly. Yet, laterial-type electrode for SiC substrate makes it easier to dissipate heat directly through electrode surface. In addition, SiC substrate does work without electrical current diffusion layer, by which thus light can not be absorbed and ultimately improving light emitting efficiency. Whereas, it is worth mentioning, because of the high cost of SiC substrate manufacturing, commercialization of SiC substrate is a long way to go.

What is LED Light Source |

A light-emitting diode (LED) is a semiconductor light source, which is widely used in LED lights today. SMD LED is one of the LED encapsulation, which is widely applied in LED tube lights. This article will give an introduction to the LED, concerning the development of LED; structural components of LEDs, types of SMD LEDs, and application of LEDs.

History and Development of LEDs

    When talking about of LED, we can get the general idea of LED phenomenon in our daily life. It occurred to us as indicator light on the flashlight and LED on display board for the first time. It is small in dimension and glows yellow light. SMD and DIP are two typical different ways of LEDs encapsulation. DIP(dual in-line package) LED is the previous LED encapsulation with the advantage of high brightness and corrosion resistance. SMD(surface mounted device) is the advanced technique to solve the inconsistancy and high failure rates of DIP. SMD LEDs bear well consistancy and stability, for the automatic process and high assembly density. As a general rule, DIP LEDs are used in outdoor lighting, while SMD LEDs are applied in indoor illumination.This is the basic knowledge of LEDs we keep trace of LEDs application in the past. (Shenzhen Syhdee Manufactory Co. Ltd.)Our company adopts SMD LEDs as LED tube light source, so SMD LEDs shall be introduced as bellow:

Constitution of LEDs

    LEDs consist of five main parts: LED holder, LED chip, silicon and gold leading wire. 

    LED holder is the cover that stands the LED chip and prevents the inner structure from corrosion and drop. LED holder is made up of copper raw material with good conductivity and heat sink. Phosphor is used in LED for lighting. Phosphor with best quality can lessen the light failure and extend lifespan. LED chip is the core of LED. According to the dimension, LED chip size varies from 7×15", 9×15", 9×20", 9×25". High quality LED chip can assure the LED lights efficiency. 

LEDs: SMD 2835&SMD 3528

SMD 2835 and SMD 3528 are the two LED dimensions used in LED tube lights. LED SMD 3528 can glow 24-26lm with 60mA driver current while LED SMD 3528 8-9lm with 20mA current. Compared with SMD 3528 and SMD 2835, the latter of which possesses wider luminous surface and heat-dispersing surface with higher current, thus making LED SMD2835 the good demand of more customers. However, SMD3528 has long history of lifespan warranty. In the governmental project, LED SMD3528 is accepted by LED tube replacement contractors.

Smart Lighting: New Experience for LED Lighting

In the 21st century, it is an epoch-making event for the biggest revolution in mobile phone. Smart phone changed the way we used generally with finger clicking on the phone keyboard instead of screen touching. Likewise, LED lighting, as the emerging industry, is changing the way we experience it .

Smart Lighting: New Concept, New Way

Smart lighting is no longer a new concept for us. What is smart lighting? Applying new technology to LED lighting to control LED lighting procedures, we can make sure less energy , more effectiveness. Moreover, smart lighting allows users to both use and feel the way, which can benefit our health and mood. This is a new way for our LED lighting experience.

Smart Lighting Technology 

Power line Carrier technology: Power line Carrier technology is one that adopts traditional wires to deliver signals and data. Compared with the wireless way, power line carrier has its advantage, which could apply the set line system without any changes and make sure the stability of signal input. Applying power line carrier technology on LED lighting is one way that employed the conventional line setting advantage.

Buss Technique: Buss technique refers to one way that combine all the components with the buss line, which is the passage for data delivery, exchange, share and control. It was applied in LED lighting on the purpose of taking charge of the whole wiring system automatically and intelligently.

Wireless Communication Tech: To solve the disadvantage of wiring communication, wireless communication is one virtual tech that delivers and exchanges the data signal by electromagnetic signals, which can achieve remote-control function.

Smart lighting combines the three multiple high techniques with LED lighting techniques to make smart LED lighting come true.

Smart Lighting Application

For several years development, smart LED lighting had been used in commercial lighting and office lighting. Household lighting will be the next milestone.

Smart Lighting in Commercial Lighting

Smart Lighting in Office Lighting

What is LED Light Source

 A light-emitting diode (LED) is a semiconductor light source, which is widely used in LED lights today. LED Light Source is one of the LED encapsulation, which is widely applied in LED tube lights. This article will give an introduction to the LED, concerning the development of LED; structural components of LEDs, types of SMD LEDs, and application of LEDs.

History and Development of LEDs

    When talking about of LED, we can get the general idea of LED phenomenon in our daily life. It occurred to us as indicator light on the flashlight and LED on display board for the first time. It is small in dimension and glows yellow light. SMD and DIP are two typical different ways of LEDs encapsulation. DIP(dual in-line package) LED is the previous LED encapsulation with the advantage of high brightness and corrosion resistance. SMD(surface mounted device) is the advanced technique to solve the inconsistancy and high failure rates of DIP. SMD LEDs bear well consistancy and stability, for the automatic process and high assembly density. As a general rule, DIP LEDs are used in outdoor lighting, while SMD LEDs are applied in indoor illumination.This is the basic knowledge of LEDs we keep trace of LEDs application in the past. (Shenzhen Syhdee Manufactory Co. Ltd.)Our company adopts SMD LEDs as LED tube light source, so SMD LEDs shall be introduced as bellow:

Constitution of LEDs

    LEDs consist of five main parts: LED holder, LED chip, silicon and gold leading wire.

LED holder is the cover that stands the LED chip and prevents the inner structure from corrosion and drop. LED holder is made up of copper raw material with good conductivity and heat sink. Phosphor is used in LED for lighting. Phosphor with best quality can lessen the light failure and extend lifespan. LED chip is the core of LED. According to the dimension, LED chip size varies from 7×15", 9×15", 9×20", 9×25". High quality LED chip can assure the LED lights efficiency. 

LEDs: SMD 2835&SMD 3528

    SMD 2835 and SMD 3528 are the two LED dimensions used in LED tube lights. LED SMD 3528 can glow 24-26lm with 60mA driver current while LED SMD 3528 8-9lm with 20mA current. Compared with SMD 3528 and SMD 2835, the latter of which possesses wider luminous surface and heat-dispersing surface with higher current, thus making LED SMD2835 the good demand of more customers. However, SMD3528 has long history of lifespan warranty. In the governmental project, LED SMD3528 is accepted by LED tube replacement contractors.

                            LED SMD 3528 LED Chip

                             LED SMD 3528 LED Chip