There are currently two basic types of solid-state lighting devices: LED, OLED. Current LEDs are very small in size (about one square millimeter) and are extremely bright. Having been developed about 25 years before OLEDs, LEDs are already employed in a variety of lighting products, such as traffic lights, billboards, replacements for incandescent lighting, backlights for smartphones, computer monitors and televisions, and as border or accent lighting. However, the high operating temperatures and intense brightness of LEDs may make them less desirable for certain general illumination applications, where diffusers cannot be readily employed.
OLEDs, on the other hand, are larger in size and can be viewed directly, without using diffusers that are required to temper the intense brightness of LEDs. OLEDs can be added to any suitable surface, including glass, plastic or metal foil, and can be cost-effective to manufacture in high volume. Given these characteristics, product manufacturers have launched some initial OLED lights for diffuse specialty lighting applications and are working toward general illumination.
Another lighting based on existing light emitting diodes, and are called “laser diodes.” We may called it next genaration lighting. It’s very similar to a LED High Bay, It’s the same materials, but you put two mirrors on either side of the LED and it breaks into a laser. Once you get reflection back and forth, you get an amplification effect, and it goes from regular emission to stimulated emission—it’s like an avalanche.
The best laser diodes are about as effective at turning electricity into light as a store-bought LED, but with one major difference: You can pump more than 2,000 times as much electricity into a laser diode. In theory, that means per square centimeter, a laser diode can produce 2,000 times as much light.
Simply replacing the light emitting diodes in a typical LED bulb with a laser diode wouldn’t work. using just a handful of tiny but powerful lasers, and then redirecting their light into fiber optic cables and other types of light-transmitting light guide plate that could take that light and evenly distribute it into a warm, diffuse glow.
It’s like Amazon Kindle Paperwhite, but it’s your whole ceiling.
So the future illumination is Laser Lighting or OLED Lighting. Market will tell us, let’s wait and see.
