A sudden increase in the patent application for radiant heat technology of LED chip used for lighting fixtures and display devices.
As the demand for LED chip widely used for lighting fixtures, display devices and etc. increase, it appears that the related patent application has increased.
According to KIPO (Korean Intellectual Property Office) on 15th June, the patent application about radiant heat technology of LED chip was less than 10 cases every year until 2003 but 39 cases in 2004 and 135 cases last year.
In the last 6 years when the patent application increase in that field, it appears that Seoul Semiconductor Inc.∙Samsung ElectroMechanics ∙ LG Innotek and etc which are the major LED chip manufactures have intensively filed the patent application, followed by Korea Photonics Technology Institute which is a LEDspecialized research institute.
The previous developed technology for radiant heat of LED chip is the method of attaching heat sink to the back of the LED chip or forming a heat transfer passage using materials which is good for heat transfer on the bottom of the package of LED chip. However, along with the improvement of previous method, lead frame of hardware metal goods which is a power supply for LED chip is recently used for radiant heat by modifying its form or the reflector which has a structure reflecting lights of LED chip into a specific direction is used for the method of radiant heat. Besides, a variety of methods of radiant heat are being developed.
The person concerned from KIPO said that “it is expected that the market size of LED chip in the world will increase 30 % every year for the next few years and that the patent application related to radiant heat technology which is necessary to improve the luminous efficiency of LED chip will continuously increase.