High Brightness LED, HBLED Tutorial

- details or tutorial about high brightness LEDs, HBLED, the technology and how they work.

High brightness LEDs, also known as HBLEDs, are now entering the marketplace.

As the name suggests these high brightness LEDs offer much higher levels of luminosity than the standard LEDs.

In view of their performance high brightness LEDs are now entering many areas where other technologies had reigned supreme before.


HBLED advantages

High brightness LEDs have a number of advantages over the standard LEDs that were previously used in applications including indicators, and displays.

  • Brighter
  • Longer life
  • Low cost
  • RoHS manufacturing compatibility (lead free)

What is an HBLED?

With many LEDs being introduced onto the market, and available light levels increasing, it is useful to be able to define an HBLED and understand what differentiates it from a standard LED.

Obviously it is dependent upon the brightness of the LED itself.

One overview of what a high brightness LED is that it is a LED that produces over 50 lumens (1 candela = 12.75 lumens).

High brightness LEDs should not be confused with high power LEDs. Although they may be one and the same, high power refers to the power consumption and not the light output. Generally it is assumed that a high power LED consumes more than 1 watt in power.

One of the chief reasons for using high brightness LEDs is their improved efficiency over other types of lamp. It is worth comparing HBLEDs with other lamps in terms of lumens per watt.


Lamp type Typical efficiency
(Lumens per watt)
High brightness LED
>100 and improving
Tungsten filament lamp
~18
CFL
~60
Sodium street lamps
~100 - 200

HBLED technology

There are several enhancements that have been made to basic LED technology to enable the high brightness LEDs to be manufactured.

The initial indicator LEDs used a traditional through hole style wired package. A standard 5mm LED would produce a light output of around two or three lumens for an input of 100 mW - equivalent to 20 or 30 lumens per watt.

Surface mount technology allowed development of LEDs in such a way that the printed circuit board could act as a heat sink - with LEDs mounted onto the board, any heat could be removed reasonably effectively, and this allowed light levels to be increased.

The next development was to add a thermal heat slug directly into the bottom of the surface mount package. Being located directly under the LED junction, this allowed heat to be removed far more effectively.

High brightness LEDs utilise this effective heat removal to enable the HBLED junction to remain within its safe limits while still producing he light output required. In addition to this, more effective manufacturing processes have enabled the efficiency to be improved.

By Ian Poole


<< Previous   |   Next >>


Share this page


Want more like this? Register for our newsletter






Refining IoT Technology to Address Demands of the Healthcare Market Mark Patrick | Mouser Electronics
Refining IoT Technology to Address Demands of the Healthcare Market
The Internet of Things, IoT is destined to affect many areas of everyday life - we expect it will include many areas like smart meters, remote control of lighting, but what about the healthcare market . . .
Whitepapers
Cost-Efficient & Extensible RF Spectrum Monitoring & Management
Discover how to use high-performance portable analyzers, open software and PC integration for field analysis, remote deployments, and efficient and effective spectrum management.

More whitepapers










Radio-Electronics.com is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on Radio-Electronics.com, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy