Can OLED lighting replace LED lighting?

April 13, 2021

Some time ago, LGD announced that it would invest in the 5th generation OLED lighting production line. This move immediately caused an uproar in the country, and various viewpoints were flying all over the sky:

“The original OLED can not only be used for display, but also for lighting.”

"OLED lighting will revolutionize the lighting industry and replace LED lighting!"

......

So is OLED lighting a wolf? And look at many domestic LED lighting companies to sit on the Diaoyutai, they know one or two.

OLED lighting uses a white-light emitting light source, and its structure is a multi-layer stack structure of red, green and blue three-color luminescent materials with functional layers. In order to improve the luminous efficacy, multiple luminescent layers are often stacked in multiple layers, which is greatly The consumption of luminescent materials and functional layer materials is increased.

We may wish to make a hypothesis: the consumption of a master OLED luminescent material and functional layer material in the 5th generation OLED lighting production line is n. Considering that the number of multilayer stacks is 6, then 6n material consumption is required. The white light material consumption of an 8th generation OLEDDisplay is only 3.84n (2200*2500/1100/1300), which means that a OLED lighting 5th generation master consumes more material than a 8th generation OLEDDisplay master. %. Considering the high cost of OLED display materials, it is not difficult to imagine the more terrible cost of OLED lighting. LED lighting With domestic companies breaking through key GaN chip growth technologies, the cost has been falling all the way, so there are still many ways to catch up with OLED lighting in terms of cost.

The second key indicator of lighting is life. Cheap and durable has always been the thinking mode of Chinese people to buy products. At present, the lifetime of GaN LED chips can reach 50,000 hours, and the key blue light materials in OLED lighting have always played the role of dragging the legs. The low light efficiency and poor life span lead to white light and easy color shift. The life expectancy of blue light materials is optimistic (the light efficiency is reduced to 50). The time of %) is about 100 million hours, and the gap with 50,000 hours is still very large.

The third is to talk about energy consumption, and the world is now trying to save energy. At present, the highest luminous efficacy of OLED lighting is OSLM's announced 87lm/W (laboratory data), while the luminous efficacy of LED mass production products easily reaches 130lm/W, and the experimental data of CREE is 240lm/W. Can't compare anymore, then it's more tears. The energy efficiency gap of OLED lighting is also very large.

Of course, we must talk about the advantages of OLED, the biggest advantage is flexibility. The shape of the traditional display cannot be changed, so the display that can be bent is very subversive of our concept.

In addition, transparent display is also the strength of OLED lighting.

It is because of these advantages that OLED lighting is currently finding opportunities in niche markets: such as high-end hotels, nightclubs, exhibitions and other B2B areas. But in the price-sensitive B2C field, it still can't compete with LED lighting.


Once the OLED blue phosphorescent luminescent material is broken, many problems such as light efficiency and lifetime of OLED lighting can be improved, but in the field of household lighting, OLED lighting still cannot compete with LED lighting. In the field of flexible lighting, LED lighting is impenetrable, so in the future of colorful worlds, LED lighting and OLED lighting will complement each other to meet the mixed needs of various fields. If you have to add a predicted time, I believe it will be the year when the OLED display broke out.

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