OLED LIFI

WHAT IS LED?

 

LEDs consists of four main parts: die, substrate, phosphor and lens. The LED die is a semiconductor device made of gallium nitride (GaN). When electric current passes through the die, it emits blue light. One or more die are then mounted to a substrate commonly made of aluminum or ceramic. This allows easier integration of the LED into a fixture and provides an efficient way to bring power to the LED.

For general lighting applications, white light is generally desired, not blue. In order to achieve the target color, phosphor is used. When the blue light hits phosphor particles, they glow and emit white light. The phosphor can be applied to the die directly, or it can be mixed into the lens material, which typically consists of silicon or glass. The lens extracts and directs the light emitted from the die.

There are two standard configurations of an LED—emitters and COBs. An emitter is a single die mounted to a substrate. The emitter is mounted to a circuit board, which is then mounted to a heat sink. This circuit board provides electrical power to the emitter, while also drawing away heat.

To help reduce cost and increase light uniformity, researchers discovered that the substrate of the LED can be removed and the die can be mounted directly to the circuit board. This configuration is known as a chip-on-board array, or COB.

At OLED LiFi, we go beyond all of the above. Our lights are solid and can withstand impact, due to an innovative WFC (Wire-Free Chips) technology, which improves their stability and thermal ability in 200%.

Until recently, the COB (Chips on Board) technology was the only one available. However, in COB, the chips and wire were simply glued against the board, in a very fragile arrangement, which led to higher maintenance rates when bumps occurred. With the new WFC technique, chips are directly soldered into the board with a metal paste (high conductor), while acting as bridges, making the LED light much stronger and more immune to impact.

Configuration of LED Luminaire

1. The LED light source
2. Optics are placed on or around the LED to extract the light from the die to a specific shape or distance.
3. Heat sink is extremely crucial to extract the heat out of the LED giving it a longer life span.
4. Power supply to convert AC power to DC power.

What makes OLED LIFI different?

OLED LiFi has pioneered a breakthrough in how we consider and illuminate public spaces. With our uniquely designed LED modules and lighting products, we create light that perfectly matches the sensitivity of the human eye in the evening with the night time vision created by our bulbs.

Our eyes are made up of cones and rods that help us see color and light. During nighttime or indoor conditions, our rods are primarily used for vision. Rods are very light sensitive, but are not very good at discerning color. Cones, which helps us focus and see color, only respond to bright light, which is why in low-light conditions we don’t see color very well.

Why does this matter in your choice of lighting? Believe it or not, productivity, accuracy, even your happiness is affected with different types of lighting.

In the spectral range of LED lights, you have the 555 nanometer (Sunlight – orange/yellow) range, which leads to an optimal photopic lumen, which are the one’s a meter reads (even at night time) and are the basis for any regulation around the world for street-lighting.

However, at night time the eye sensitivity shifts to the 507 nanometer (Moonlight – cyan) range which leads to optimal scotopic vision but less (measurable by existing meters!) lumen. OLED LiFi makes street lights with a high scotopic and low photopic range which leads to a HIGH S/P ratio of around 3 whereas traditional LED streetlights have a S/P ratio of 2.4 to 3.4. So their lumen/m2 (= lux) is higher as it ONLY measures photopic lumen.

OLED LiFi has started the discussion that a high S/P ratio leads to better vision at night even though you have less photopic lumen (less lux on the street). So the high S/P ratio is not the problem in regulation but the low Photopic lumen resulting in a low lux level.

OUR TECHNOLOGY

  • We offer the most efficient light and color sensitivity by mixing Cyan, Red and Green LEDs.
  • We use as little as possible blue light, which distorts color.
  • We use optics and reflectors vs. directional light.
  • We do not use phosphor in most of our products – except in our SL3
    Streetlight in order to meet outdated regulations – which makes our lights last longer.
  • The weight of our product are generally 40 – 50% lighter than our competitors, which makes installation and shipping easier and cheaper, and our environmental impact much lower. Thus, fewer resources are used for production
  • Our lights have the longest lifetime amongst most LEDs available.
  • Our lights have the highest S/P ratio.
  • Our lamps yield the highest quality light and the best color perception.
  • At low light levels the human eye is more sensitive to certain colors. By using those specific colors in our luminaires, we provide better contrast and color recognition which results in perfect visibility.
  • The combination of our LED technology and the OLED LiFi Mesopic concept results in energy savings of up to 90% over incandescent lighting.
  • Besides energy savings, we also save on the cost of replacement bulbs and maintenance. This results in a short return on investment and low Total Cost of Ownership.
  • We use pure LED chips for our outdoor lights, without the use of phosphors, and the operating temperature of our lights is very low – which greatly enhances longevity. We guarantee high quality and long operation time with almost no lifetime drop in light output.