As one of the thinnest, hardest, and most conductive new nanomaterials found in the world, graphene is called "black gold" and is the king of new materials. Scientists even predict that graphene will completely change the 21st century. And the news about the extraordinary application of graphene is constantly emerging the thinnest light bulb in history; the phone charging takes only a few seconds...
It is believed that many researchers and enterprises in China have already been engaged in the research of graphene applications. With the advancement of technology, in the future, the industrialization of graphene preparation and application will be launched on a global scale.
So what can graphene do in the field of LED lighting? Let's take a look at the development of technology from a patent perspective.
After a simple search in the Chinese database, it was found that the patent application for graphene in the field of lighting began in 2008, and the number of applications increased every year. So far, there have been more than 1,000 patent applications, of which more than 90% are from domestic applicant. Mainly involved in two major categories of H01L and F21S, the application in the field of F21S is basically a domestic applicant, mainly using the thermal conductivity of graphene, coating and heat dissipation on the surface of the light source or lamp, more applicants, mainly based on corporate and individual applications. There is not much to describe here.
In the field of H01L, the top ten applicants are mainly domestic research institutes and universities. The enterprises include BOE, IBM and South Korea Samsung. Among them, IBM's application is mainly in the field of power semiconductor devices, and Samsung's application involves LEDs. Lighting fields such as OLEDs and display devices. The following is an overview of Samsung's published patent applications in China in the field for readers' reference.
As can be seen from the above table:
1. Samsung's patent application for graphene in China started in 2011, and it has not been authorized yet. This shows that in the field of patent applications, the giants are not ahead of the domestic time, there are still many variables in the future. Domestic companies have stepped up research and development to enhance intellectual property awareness and are expected to catch up with foreign companies.
2. These patents mainly cover the fields of LED, OLED and display devices. In summary, they can be divided into two categories:
1) Subversion type : represented by patent 1, replacing the current semiconductor compound luminescence with graphene material; that is, using another way to achieve the same purpose, subverting the previous practice.
2) Improved type : represented by patents 2-8, a layer of graphene material (3, 4, 6, 7, 8) is added to the original structure. Due to a series of advantages such as transparency, conductivity and heat conduction of graphene, additional After that, it can make up for the deficiencies and achieve remarkable technical effects; or directly replace the original materials with the graphene material (patent 5), thereby achieving significant technical effects. Most of the patents are improved, and the patents are relatively difficult. The strength of domestic patent applications in this type of patent is not weaker than that of foreign companies, and the long-term foundry, technicians have accumulated a lot of relevant experience, and it is easier to combine new materials. Characteristics, propose improved technical solutions.
In summary, the technical development of graphene in the field of lighting is still in the growth stage, and the leading edge of foreign companies is not obvious. Domestic enterprises and R&D institutions are strengthening their investment. It is believed that there is an opportunity to catch up with foreign technology in the future market. Get a place.
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