High-Bright LEDs (HBLED)
High-Brightness LEDs are a new generation of LEDs which are bright enough for illumination applications, like interior and exterior lighting, architectural illumination, projection display, display backlights, signage and automotive. As the name suggests these high brightness LEDs offer much higher levels of luminosity than the standard LEDs. 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.
High brightness LED are LED that produces over 50 lumens (1 candela = 12.75 lumens). It 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.
HBLED is energy efficient, eco-friendly, low power, and last longer than the average compact fluorescent and incandescent bulbs. High brightness LEDs have a number of advantages like Brighter, Longer life, Low Cost, RoHS manufacturing compatibility over the standard LEDs. Precision designed optics, multiple distributions, lumen outputs and colour temperatures make the HBLED ideal for industrial, commercial, manufacturing, gymnasium and other applications that utilize traditional HID and linear fluorescent high bays.
The High Brightness LED requires a much higher forward current of 350 mA, more than a microcontroller I/O can provide. One solution is to power the LED directly from the main supply and add a MOSFET in series with the LED to control the brightness. The second method is to use Digital Signal Controllers which provides several features which allow for precise control of high brightness LEDs. These features include a High-Speed 10-bit Analog-to-Digital converter with up to 4 million samples per second, a flexible high-speed PWM, a high-speed analog comparator with a fast 20 nanosecond response time, and a flexible clock scheme with 40 MIPS operation speed.
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