The Man With The Million-Dollar Prize
Forbes, NY - 30 minutes ago
With light-emitting diodes, you can provide light in a much more economical way. That can be applied in a number of areas like lighting buildings and ...

Getting the LEDs in
Marquette Mining Journal, MI - 49 minutes ago
In its efforts to save energy, the downstate city is currently testing light-emitting diodes — or LEDs — in its globe streetlights. ...

LED (Light Emitting Diode) lights attract a great deal of attention as “a light for the 21st century”. This is the field where the market is fast growing as the LED light can be an alternative light source to a conventional incandescent bulb and fluorescent bulb. Compared to an incandescent lamp (bulb type), LEDs have lower power consumption and a longer lifetime. There are a number of advantages including being environment-friendly and having an excellent response speed. This technology is already introduced into a broad range of applications such as illumination, back lights, indicators and decorative lighting.

LED lights and bulbs bear the following characteristics:

1. Color with High purity and vividness. So far, LED products almost cover the whole spectrum of visible light and the vividness of the color is much higher than the traditional bulbs. The traditional way to generate the multicolor light is utilizing filters which reduce the luminous efficacy of light source.

2. Long service life. The power consumption is 1/5 to 1/10 less and durability is 10 times longer compared to light bulbs. In LED technology development, the primary three colors of light have been developed and it became possible to realize a full-color display, which is utilized in coloring the display field.

The average life expectancy of an LED light is 100,000 hours, which can greatly reduce the maintenance costs of lighting, avoid the often-bitter lights.

3. LED lights have no mercury in light source and no ultraviolet radiation in beam of light. LED is a kind of solid light source and environmentally friendly and can meet the special requirements for commodity exhibition at perfume store, jewel store, museum and art gallery.

4. LED is a kind of solid light source and resistant to shock.
The low-calorie, non-thermal radiation, cold light source can be safely arrived in touch: to precise control of light and luminous perspective, soft-color, non-glare; No mercury, sodium and other elements of the potential health hazards of substances. Built-in micro-processing system luminous intensity can be controlled to adjust luminescence, optical and art combined.

5. Less power consumption. Single-tube power LED 0.03 ~ 0.06 kilowatts, a DC-driven, single-drive voltage of 1.5 to 3.5 volts, the current 15 to 18 milliamperes, reaction speed, high-frequency operation. The same lighting effects circumstances, the power consumption is the eighth incandescent bulbs, fluorescent tubes in half, Japan estimated that the use of optical efficiency than fluorescent lamps to replace twice the Japanese half of the LED and fluorescent lighting. Annual savings is equivalent to 60 million liters of crude oil. Lights on the bridge parapet cases, the same effect of a 40-watt fluorescent, and each LED used only 8 watts of power, but can Colorful changes.

6. The color of LED light is dynamic and can be set at different brightness. The combination of three original color of red, green and blue can be modulated through PWM.

7. LED light has strong emitting direction and makes good use of luminous flux; besides, it’s a mini kind of light and is quite easy to design the outlook and to control the light intensity.

8. LED can be powered with direct current which is safer.

9. LED can be started up in milliseconds with no influence of startup temperature and realizes the full luminous flux instantly.

Backlights offer improved efficiency and superior thermal management to illuminate LCDs with more brightness and/or less power than traditional CCFL approaches.

Light rings based on using LEDs with 850 to 880nm wavelengths offer a compact means to illuminate a given area with near-infra-red light.

Six-leaded packages allow individual colour control of each colour chip to display a multitude of colours (including white) and enhanced thermal management.

Rapid is supplying the prize for the winners of a "top secret" practical engineering challenge set on the day.

Light guide packages are thinner than ever for OEMs who need to meet the increasing consumer demand for smaller, slimmer size with no sacrifice in performance.

Despite producing a 50lm output with all LEDs illuminated, the SEPW devices are not power hungry, using just 100lm/W (at 20mA) with all LEDs illuminated.

The cool white power LED will enable lighting application designers to achieve a greater output without sacrificing efficiency by using higher drive currents.

Medium- and high-power LEDs are available in six different package sizes and in several shades.

OSA Opto Light (OSA) has released the OLS 330 and OCL 400 LEDs, with a 1206 SMD with lens and a white ceramics package.

Modular system includes all elements required to implement an LED-based lighting product, and so designers only need to connect the devices to the appropriate power source.

OP180 and OP280 Series IR LEDs are ideal for noncontact position sensing, datum detection, machine automation, and optical encoding applications.

Multichip LED devices provide superior colour balance for display backlighting because of the high density of LEDs that can be achieved.

Move gives Design LED the capacity to expand its design, sales and product marketing teams in the coming months.

Osram reports record values of efficiency and lifetime while maintaining the brightness of warm white organic light emitting diodes (OLEDs).

Backlight design employs side-firing LEDs that focus their light into a high-performance light guide.

The high brightness output per LED and small package footprint provide lighting designers with greater flexibility in designing the size, shape and appearance of lighting assemblies.

AbacusLED offers a dedicated and well resourced website, featuring selector guides for high power LEDs, LED drivers and associated products.