First, let’s look at what OLED is. OLED, that is, organic light-emitting diode, also known as organic light-emitting diode (Organic Light-Emitting Diode), was discovered in the laboratory by Chinese-American professor Deng Qingyun, and research on OLED began. OLED display technology is self-luminous and uses very thin organic material coatings and glass substrates. When current passes through, these organic materials will emit light. The OLED display screen has a large viewing angle and can save power.
Printing technology is considered to be an effective way to solve the high cost of OLED and achieve large area, and has broad development prospects. This technology can combine liquid functional materials and advanced printing equipment to produce OLED displays, which can improve material utilization and production efficiency, reduce manufacturing costs, and increase production capacity.
What is the secret of printing OLED?
The most common OLED printing technologies are inkjet printing and screen printing. Typical inkjet printing equipment has several print heads, which are used to print polymer luminescent materials of different colors. Each one has several micro-nozzles to accurately deposit red, green, and blue luminescent material solutions into the isolation column grooves of the ITO glass substrate. After the solvent evaporates, a nanometer thin layer (thickness of about 100 nanometers) is formed to form a luminescent pixel. The nozzle is made of special piezoelectric ceramics. The size of the droplets can be precisely controlled by controlling the voltage and time applied to the ceramics, thereby regulating the thickness of the luminescent layer. Since this is a completely digital technology, it does not require any processing.
The above explanation may seem a bit confusing, but to explain it in more straightforward terms, "printed OLED" should be the use of printing to produce OLED displays.
Who is investing?
TCL joins hands with Merck to print OLED
Not only Skyworth will vigorously promote OLED TVs in 2016, but TCL is also accelerating the layout of the printed OLED display industry. "Guangdong Juhua Printing Display Technology Co., Ltd." (hereinafter referred to as "Juhua"), established by TC in conjunction with many domestic companies, signed a strategic cooperation agreement with the world's largest liquid crystal material provider, Germany's Merck Group, in Hong Kong on June 13. The two parties will jointly develop inkjet printing OLED materials and inkjet printing process technology.
Samsung and LG are striving for OLED inkjet printing process technology
Samsung Display and LG Display dominate the organic light-emitting diode (OLED) market and are committed to introducing inkjet printing processes. The two major Korean panel manufacturers will launch demonstration production lines earlier than market expectations in 2017 to ensure RGB OLED display production capacity.
Suzhou Institute of Nanotechnology, Chinese Academy of Sciences has made progress in inkjet printing quantum dot luminescence technology
The Printed Electronics Technology Research Center of Suzhou Institute of Nanotechnology, Chinese Academy of Sciences is one of the earliest scientific research teams in China to develop printed electronics technology. The center has recently made major breakthroughs in the formulation of quantum dot ink and the quality of printing films. The self-developed quantum dot ink has very good stability. The ink is still stable after being placed for one month and maintains the same luminous efficiency as commercial quantum dots.
Strong joint strategic expansion to support Juhua Printing OLED display technology
Recently, Guangdong Juhua Printing Display Technology Co., Ltd. (jointly invested by TCL's China Star Optoelectronics Co., Ltd. and Tianma Microelectronics Co., Ltd.) announced the signing of strategic cooperation agreements with world-leading companies such as DuPont of the United States, Sumitomo Chemical of Japan, Nissan Chemical and Cody of the United States. The above-mentioned companies will fully support Juhua's material and process needs in the development of printed OLED technology, tailor relevant R&D equipment for Juhua, and escort Juhua's research and development in the field of printed OLED technology.
ANNA