Choosing an LED technology is like choosing the right car to buy. There are different models that provide more or less features. Once you decide the features you want , you can easily choose your suitable LED model.
Modern LED technology was developed in 1962 by Nick Holonyak with his invention of the DIP LED, and the LED industry has been innovating it ever since.
LED CHIPS
Chip Types
Where Chips Come From
Chip Selection
There are various types of LED chips packages available in the LED lights market. The basic types are:
- DIP ( Dual inline Package)
- SMD ( Surface mounted diode)
- COB ( chip on board)
- MCOB ( multiple chips on boards)
- MCCOB ( multiple chips and cups on board).
- FC (Flip-Chip)
Chip Selection
Where Chips Come From
Chip Selection
Although many LED lights bulbs or flood led lights products might look very much the same, internally they can be very different. When purchasing outdoor LED lights or indoor, you should ask yourselves these questions:
What lighting feature do I need, application, color, waterproof, etc?
Dimmable or non-dimmable?
How bright and what lumen ?
Where Chips Come From
Where Chips Come From
Where Chips Come From
Led chips are made by many different companies and in may different countries. The most popular manufacturers are:
- CREE, Bridgelux( USA)
- Samsung, SSC, LG Innotok ( Korea)
- Nichia, Sharp, Toyoda (Japan(
- Osram(Germany)
- Philips ( Netherlands)
- Everlight, Epistar ( Taiwan)
Chip Packaging
Chip Encapsulation
Where Chips Come From
The naked LED chips need to be protected from dust and moisture and other environmental hazards through a process termed ‘Encapsulation’ or packaging. This involves embedding the chips in epoxy resin.
Chip Encapsulation
Chip Encapsulation
Chip Encapsulation
Encapsulation protect chip by using adhesives as encapsulate. Most adhesives that are used for encapsulation are UV-curing epoxy resins, which can be cured within just a few seconds with UV light.
Chip Grade
Chip Encapsulation
Chip Encapsulation
All the different styles of chip have a grade. It is not enough just to be told it is a CREE or Epistar chip, you need to know the size and model of the chip, lumen per watt, CRI etc in order to determine the performance.
Principles and Terms
CRI
Driver
CRI
A color rendering index (CRI) is a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully in comparison with an ideal or natural light source.
CCT
Driver
CRI
CCT- Color temperature defines the color appearance of a white LED. CCT is defined in degrees Kelvin; a warm light around 2700K, moving to neutral white at around 4000K, and to cool white, at 5000K or more. The warmer the colour, the less lumens per watt achieved and visa versa.
Driver
Driver
Driver
All LED chips are designed to operate under an optimum drive or forward current. This can be 350 mA, 700 mA, 900mA etc. This optimum current balances the amount of light given by the chip, with the ability to dissipate the heat from the base which is vital to ensure chip long life.
Lumen
Illumination
Driver
Lumen is measurement of light emitted by a lamp .This usually expressed as lumens per watt.
Illumination
Illumination
Illumination
The distribution of light on a horizontal surface. The purpose of all lighting is to produce illumination.
Efficacy
Illumination
Illumination
The ratio of light produced to energy consumed. It's measured as the number of lumens produced divided by watt.
Differences Between LED Technologies
DIP
DIP
DIP
Dual In-Line Package LED technology has been around for more than 50 years. Though it is old, DIP LEDs are far from outdated as they are still used extensively today for large signs and displays.
SMD
DIP
DIP
SMD chips (known as surface mounted diodes ) have been a very important development for the LED industry because of the ability to put 3 diodes on the same chip. When a chip includes a red, green, and blue diode, you have a chip that can create any color you want by adjusting the level of output from each individual diode on the chip.
COB
DIP
MCOB/ MCCOB
The most recent LED development has been “Chip On Board” or COB technology. COB and SMD can be similar because like SMD, COB chips have multiple diodes on the same chip. However, this is where the similarities end.
MCOB/ MCCOB
FC ( Flip-Chip)
MCOB/ MCCOB
MCOB or “Multiple Chip On Board” and MCCOB ( multiple chips and cups on board). These devices are very similar to COB chips in their application and are more or less just multiple COB chips together in series.
FC ( Flip-Chip)
FC ( Flip-Chip)
FC ( Flip-Chip)
FC (Flip-Chip) LED is a new patented technology by mounting the LED diode upside down compare to the present day COB LED production.
FC (Flip-Chip)
FC ( Flip-Chip)
FC ( Flip-Chip)
FC (Flip-Chip) LED is a new patented technology by mounting the LED diode upside down compare to the present day COB LED production.