Difference Between LED and OLED (With table)

The major point to note is that OLED has a wider viewing angle of 84o unlike that of LED which has only an angle of 54o. OLED also has a dominant black level from that of LED.

LED vs OLED

The difference between LED and OLED is that LED does not work on self-illumination because it will require a backlight for it to work. OLED works on the principle of self-illumination as it does not require any backlight in order to start its process.

LED works on the principle of electroluminescence and it was invented by H.J Round in 1907. Both OLED and LED share the same principle and OLED is a developed version of LED.

OLED (Organic light-emitting diode) is a type of LED (Light-emitting diode) in which the film of organic compound that has a layer of emissive electroluminescent, which gives out light, in retort to an electric current passed through it. LED on the other hand is a semiconducting light source that emits light when electric current flows through it.

Comparison Table Between LED and OLED

Parameters of ComparisonLEDOLED
PowerLED consumes more power than OLEDOLED consumes less power than LED
QualityThe picture quality that LED provides is really goodOLED comparatively has a better picture quality than LED
BrightnessIt is brighter than OLEDGives less brightness
SizeIt has a large sizeCompared to LED it is comparatively smaller  
Response timeIt has a pretty slow response time when compared to OLEDThe response time given by this is fast.
IntensityIt has very low intensityIt has a high intensity

What is LED?

LED (Light-emitting diode) is a device that works on the principle of Electroluminescence and was invented in 1907 by H.J Round. Its first production took place in October 1962. It is basically a semiconductor light source that gives out light when an electric current is passed through it.

The electrons that are present in the semiconductor combine with the electron holes and release energy in the arrangement of photons. LEDs were able to replace small incandescent bulbs in lamps etc. and later used for rooms and outdoor area lighting.

LEDs have many advantages over small bulbs that were used before which include low energy consumption and a longer lifetime. They have a faster switching and are small in size which is a very big advantage as even though they are small they emit a good amount of light to a far range.

LEDs are mostly used as gauge lights for electronic devices. They are also used in several other devices even for showpieces and flashlights.

LED has a voltage source linked to the positive side of the anode and the negative side is linked to the cathode side. LED has a very technical working but its uses and its practical applications are almost limitless.

What is OLED?

OLED (organic light-emitting diode) is a type of Light-emitting diode in which the film of the organic compound has a layer of emissive electroluminescent which gives out light in retort to an electric current passed through it. There are two main types of OLED; those which are based on employing polymers and those based on small molecules.

OLED emits visible light and hence doesn’t require a backlight for the work, unlike LED. Basically, OLEDs are used in devices like television screens, portable smartphones, and PDAs.

Andre Bernanose with the help of some co-workers at the Nancy University (France) made their first observations of electroluminescence in the 1950s. In around 1999, companies like Kodak and Sanyo made their partnership to research and develop OLED displays.

OLEDs have a surface light source and they produce diffused light. They have a pretty low intensity and are easy to dissipate heat. One big advantage that they carry is that they are very thin and lightweight which is very attractive for customers.

The OLED display is a pretty different method from others. The display is basically fabricated by arranging all the small lighting pixels of RGB (red, green, and blue light) side by side. The structure that OLED lighting follows is that R+G+B= white light.

Main Differences Between LED and OLED

  1. The backlight is essential for the LED light to work whereas OLED does not need a backlight at all for illumination because here the carbon is an essential source for light.
  2. The display angel that OLED and LED have are 84o and 54o respectively. Although the picture quality provided by LED is excellent OLED has a comparatively better picture quality than LED. When the LED screen is seen from the center the quality is good but when seen from either side the deterioration can be seen.
  3. LED has a thinner screen when compared to LCD (liquid crystal display) but OLED has a thinner screen when compared to LED. LED, although has a greater screen size of 100 inches when compared to OLD whose latest version has a screen of 90 inches.
  4. When compared to LED, OLED takes in less energy for its work. This is mostly because OLED has a property self-illuminate without the use of a backlight to initiate any process to take place.
  5. LED has a point light source with high directivity. It also has a high intensity and is hard to dissipate heat. On the other hand, OLED has a surface light source with diffused light. It has a low intensity in general and is easy to dissipate heat. IT is lightweight and think, unlike LED.

Conclusion

OLED is basically a type of LED with some advancements and has some more advantages than that of LED. But LED is most common in use and is more well known than OLED.

The major differences that are mentioned above are how people can understand which of the two devices play a better role and have more usage.

The parameters that are mostly taken in check while looking at two devices are basically the picture quality and its look that is if it is thin, thick, lightweight, etc.

References

  1. https://www.osapublishing.org/abstract.cfm?uri=oe-22-17-20646
  2. https://iopscience.iop.org/article/10.1088/0022-3727/41/13/133001/meta
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