These days, OLED display technology is gaining more and more attention. This next-generation flat panel is extremely thin, and is seen as a clear departure from both LCD and plasma display technologies.
Hodogaya Chemical has developed Hole Transport Materials (HTM) and Electron Transport Materials (ETM) for OLED applications using our long experience in synthesis technologies, including ultrapure organic chemicals such as Organic Photo Conductor (Charge Transport Materials), as well as computer-based molecule design technology. Other OLED materials such as Emitting Materials and Hole Injection Materials are under development. Our unique OLED materials will help to extend the life and stability of OLED devices.
As a leading manufacturer of OLED materials, the Hodogaya Chemical group supplies materials to major panel manufacturers both in Japan and overseas.
Subsidiary: SFC CO.,LTD. HODOGAYA CHEMICAL KOREA CO.,LTD.
Smart Phone
OLED TV
Basic Principles of OLED Technology
‘EL’ stands for electroluminescence. Organic EL is a light emitting system featuring organic compounds that emit light when electric current is applied.
An OLED display is a laminated construction, which consists of three layers, namely a hole transport layer (HTL), an emitting layer (EML) and an electron transport layer (ETL). The HTL transports holes (plus), the ETL transports electrons (minus), and the holes and electrons are brought into the EML, and combined to emit light.
OLED System
Hodogaya Chemical’s core technology
Hodogaya Chemical manufactures mainly Hole Transport Materials (HTM) that are used in the hole transport layer. HTM technology is based on Charge Transport Materials (CTM) which were developed for electrophotography and printers.
We are also developing Electron Transport Materials (ETM) for use in the electron transport layer, and other materials. From dyestuffs to imaging materials, and from imaging materials to OLED materials, Hodogaya Chemical is charting its course along with the flow of the times.
*harge Transport Materials (CTM): Materials for the Organic Photo Conductor (OPC) drums that are a key component of electrophotographic copiers and printers.
Advantages of the OLED display include a much smaller thickness than liquid crystal displays, deeper black level, greater contrast ratio, and faster response time that enables clear reproduction of fast-moving videos. Meanwhile, limited lifetime and screen size were major technological challenges.
Recent technological advances, however, have expanded the use of OLED for smartphones, smart watches, tablet PCs, and large TV screens. OLED is expected to be used for VR/AR glasses and many other applications.