Around 2000, Japan's Toyota Synthetic and Austrian company Tridonic Jennersdorf GmbH, German company Leuchtstoffwerk Breitungen GmbH and Litec GbR participated in the four members of the Barium Ortho-SilicateEuropium (BOSE) alliance, and various yellow silicate phosphors. The composition and LED applications have applied for many patents. At the same time, Intematix in Silicon Valley, USA, began to emerge and eventually became the world's largest independent manufacturer of LED phosphors.
The first invention of Intematix is ​​a broad family of silicate phosphors, not only in yellow but also in the spectral range of blue-green, green, yellow and orange. Silicate materials have high brightness and are critical for mobile phones, laptops, tablet displays and Christmas light applications. Most importantly, the main inventors of the two silicate phosphors, Intematix and BOSE Consortium, have mutually authorized each other's patents in order to expand the market size while preventing future conflicts.
The licensing of the silicate phosphor patent has developed two separate and necessary areas. The BOSE Alliance proactively provides device licenses to LED manufacturers who can apply silicate phosphors to their LED products. However, these licenses do not imply that the LED manufacturer can purchase any silicate phosphor from any supplier, nor does it mean that the LED manufacturer does not infringe the Intematix silicate patent. The following is one of the examples. The verification of patents in the supply chain will become critical. In particular, silicate suppliers must have patents for phosphor synthesis and manufacturing.
Therefore, when the application's authorization can satisfy the patented part of the application, it is necessary to purchase a phosphor such as Intematix from a supplier that has a patent for silicate synthesis. One of Intematix's earliest patents is US Patent No. 8017035 (and 7311858, 7575697) silicate yellow-green phosphors, and the first patent application scope is as follows; Phosphor deposition in LED manufacturing sources: Tridonic 1. A white LED includes: a source for emitting radiation having a wavelength between about 410 and 500 nm; a green-yellow phosphor having the chemical formula (Sr 1-xy Ba x M y ) 2 SiO 4 :Eu 2 + F, Cl, Br, I, S, N, B, wherein M is at least one element selected from the group consisting of calcium (Ca), magnesium (Mg), zinc (Zn), and cadmium (Cd); Fluorine (F), chlorine (Cl), bromine (Br), iodine (I), sulfur (S), nitrogen (N), and boron (B) are usually used as one of the combinations with a doping concentration in the range of 0.0001-0.2. . . . "It must be noted that the scope of the patent application is as in the previous LED design, but the introduction of a new orthosilicate chemical formula and its application to LEDs. The invention is patented and Intematix is ​​fluorescent here. Powder and LED design will become the owner. Therefore, in order to provide packaged LEDs for marketing, BOSE and Intematix must be authorized to avoid IP risks. Secondly, must have the necessary patents. Authorized manufacturers purchase phosphors.
With the rapid growth of LED power and technology over the past few years, the lighting market has rapidly grown as part of LED applications and has led to LED lighting that has doubled the size of displays. The invention of phosphors accelerates the development from the unique spectrum and illuminance requirements of the lighting industry. Among them, such as the red photonitride Japanese manufacturer Mitsubishi Chemical. Intematix has also become at the forefront of the development of these phosphor technologies. Thomson Reuters, the global information company, published the world's top 100 inventors in 2015, and Intematix was selected as one of the leading patents in the San Francisco Bay Area LED Technology Company. When other manufacturers make one or two phosphors for lighting, Intematix produces the phosphors needed for all lighting, making it an important supplier of LED phosphors.
In addition to silicates, Intematix produces its own proprietary red nitriding and green aluminates, along with other major LED phosphors. However, there is a group of patents that stand out, green aluminate and yttrium aluminum garnet Green Aluminate and Lutetium Aluminum Garnet (GAL and LuAG, respectively), with a wide range of intermediate spectra and high-stability phosphors that can be used as illumination. The patents in the following Intematix layout are indicative of the comprehensiveness of their patents for future lighting. U.S. Patent No. 8,529,791 (also known as 9023242, 8475683, 8877094) is the first patent application scope, green illuminating, garnet-based phosphors for general illumination and backlight applications, as shown in the previous example, as the patent owner of the material composition.
A green light aluminate phosphor comprising ruthenium, osmium, at least one alkali rare earth metal, aluminum, oxygen, and at least one halogen, wherein the phosphor is characterized by absorbing excitation radiation having a wavelength ranging from about 380 nm to about 480 nm, and the emitted light has a peak emission wavelength ranging from about 500 nm to about 550 nm.
However, this patent also further includes the scope of the patent application described below, as well as the ownership of white LED lighting applications.
"18. A white light LED comprising: a radiation source configured to provide radiation having a wavelength greater than about 280 nm; and a green light activated yttrium aluminate phosphor comprising yttrium, lanthanum, at least one alkaline earth a metal, aluminum, oxygen, and at least one halogen, wherein the phosphor is characterized by absorbing excitation radiation in a wavelength range of about 420 nm to about 480 nm, and the emitted light has a peak emission range of about 500 nm to 550 nm; and at least one red Light phosphor or yellow phosphor."
GAL and LuAG series form a stable mid-band spectrum from 500nm to 550nm with high performance and high color rendering (CRI) characteristics, and become the stem of high quality illumination phosphors. Intematix holds patents on material composition. In addition, Intematix is ​​patented for high-efficiency, high-power and high-value white light in the GAL and LuAG series of phosphors and red phosphors.
As mentioned earlier, LED designers must study the field of intellectual property to ensure that when the LED is in volume production, it contains clear patent content. In summary, the scope of these patents is considered in two main directions, and both directions must be clear, namely the composition of the phosphor material and the right of the phosphor to be applied in the LED design. The above analysis and execution errors may lead to serious legal conflicts, and the patent structure will vary according to geographic jurisdiction. The LED system and component designer must obtain formal IP authorization and contact with the correct supplier object with the required patent to complete his/her design. When LED companies develop new products, it is not worth the risk of infringing on major patents from global manufacturers because they want to save some renminbi. Over time, learning and the accumulation of correct IP intellectual property knowledge can naturally make the right choices in patent licensing and material procurement.
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