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Can You Really Tell The Difference Between An LED And An OLED Lighting

Edit:Shaoxing Xinshan Science Technology Co.,Ltd   Date:Jun 19, 2017


Can you really tell the difference between an LED and an OLED lighting


The difference between an LED display and an OLED display is not just a letter, but a completely different imaging technique. LED display is set microelectronics technology, computer technology, information processing as a whole, with its colorful, wide dynamic range, high brightness, long life, stable performance and reliable, which is the most dominant public display media. With the development and innovation of LED display technology, the LED display industry is based on the product, and then the product design, so that the overall solution can be provided in the future.


Leds and oleds as a new type of semiconductor lighting technology, known as the fourth generation of lighting source or green light source, compared to traditional lighting products, it is energy-saving, environmental protection, long life, small volume, etc., can be widely used in all kinds of instructions, display, adornment, back light, general lighting and urban night scene, etc.

In recent years, therefore, some developed countries in the world have been actively developing LED and OLED semiconductor lighting. However, leds and oleds have their own characteristics because of different working principles and production processes.


LED


The full name is light-emitting diodes (leds), which are made using a type iii-iv inorganic semiconductor material and chemical vapor deposition (CVD) process. As in the traditional semiconductor industry, the cost of making the process is higher and the scale is difficult to achieve.

Therefore, leds can only be applied in the form of point-light sources. In general indoor lighting area, in order to achieve a certain space lighting brightness, LED to high luminous intensity, so in order to prevent glare, downy light, leds are often used must be mounted to the chimney. However, the lighting efficiency of LED lamps will also decrease.

To make use of leds to make surface light, such as the backlight of an LCD, you need to combine multiple leds with a complex optical system such as a dashboard. In addition, leds' luminous efficiency drops sharply as temperatures rise.

Because leds are so small, the heat generated by the operation is difficult to get out in time, so it has to be equipped with a radiator for LED lights. Based on the above points, the advantages of LED lighting technology, such as luminescence efficiency, lightness and cost advantage, can be greatly reduced after making lamps.

Currently, white leds are generally implemented using blue leds to cover phosphorescent powder. The phosphor is stimulated by the blue light from the LED, and the white light is combined with the blue light of the LED itself. Although the cost is low, there are many disadvantages.

On the one hand, this way produce Bai Guangxian color index is not ideal, namely the white color under the irradiation of the object will appear deviation, makes it unsuitable for applications requiring higher quality in color; Phosphor powder, on the other hand, is much faster than blue leds, causing white light to drift blue and shorten life.


OLED


The full name is an organic light-emitting device, as the name suggests, and OLED is made from organic semiconductor materials. OLED materials have small molecules and polymers, which are mainly used in small molecular organic materials.

Because small molecule oleds use lower cost of glass as a base plate, with large area vacuum heat deposition coating process manufacturing, OLED is a natural light source technology. The OLED process is much more competitive than the ultra-high vacuum and high temperature environment of LED process.

Organic material is much lower than inorganic semiconductor materials in theory, is currently limited to material utilization in industry scale and production factors, such as organic material cost is high. But as the industry expands, the cost of organic materials will plummet.

OLED generally light and soft, close to the lambert radiation distribution, so the OLED itself is almost a lamp, without the use of a lampshade. At present, white light oleds are made up of organic materials, which are mostly red and green (yellow) blue, and are mixed in sequence.

In addition, organic materials luminescence spectrum is characterized by its half peak width is very wide, so no bigger gap in the spectrum of white light OLED, the OLED light source color rendering index is very good, especially suitable for general indoor lighting, and even professional photography and other applications. Moreover, by adjusting the luminance ratio of each color material, the light can be produced in any color to suit different application situations.

Because OLED has a very large luminous area, the heat generated at work can be emitted in time without the need for heat dissipation. So oleds can be very light and thin, saving space costs. In addition, oleds can be designed in a variety of forms, greatly expanding the application space of OLED lamps in the area of art decoration.

OLED killer features can be transparent, and even can realize the traditional ways of application of the lamps and lanterns is completely unable to imagine the OLED production on the window glass, for example, let in natural light transmission in the daytime, evening used as lighting lamps and lanterns