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Convergence Components & Materials Research Laboratory

HOME > R&D > Convergence Components & Materials Research Laboratory > New devices & Materials Research Department > areas for Research & Development

areas for Research & Development

Oxide electronics technology

Overview

National research program on the oxide semiconductor and the oxide semiconductor thin-film transistors (oxide TFTs) has been proceeded in ETRI. It also includes research on the transparent display using the transparency of oxide semiconductor and the transparent smart window as a convergent device of transparent display and transparent electronic devices. TCO (transparent conducting oxide) and transparent sensors are another research themes.

Oxide semiconductors are good candidate for AMOLED and AMLCD because of their very simple manufacturing process and high performance (high mobility and high on-off ratio). Until now, in flat panel display, Si has been the main semiconductor material for active matrix backplane, but in the near future, oxide semiconductors will be the major materials for the display backplane. In ETRI, the core principal technologies for the application to industry such as new materials and high performance-device have been developed.

Transparent display panel consists of transparent backplane whose constituent are transparent electrode, insulator and semiconductor and transparent emission parts. Highly transparent display (transmittance > 50%) will be realized with the transparent oxide semiconductor. In ETRI, the transparent AMOLED (T-AMOLED) panel has been developed using transparent backplane combined with transparent OLED. The transmittance of T-AMOLED will be enhanced using the highly transparent and low resistance electrode developed in ETRI.

Transparent display is the new conceptual display which overcomes the visual and spatial constraint of current display. Eventually transparent display could change the glass window into the display panel. Especially, the both-side display for game and counter, window display for vehicle display, and piled display for mobile display are the candidates for industry applications. These new type of display will open new markets for display industry.

Another research areas are the TCO and application devices. Developing replacements for rare elements and searching for the low-priced materials are the target for the research of TCO. Transparent memory device and transparent sensors are also developed as a applications of transparent devices.

Study on Electronic Paper

Overview

Electronic paper (e-paper) belongs to a category of reflective display, in which images and pictures can be sustained without the need of external power supply. Due to such characteristics electronic papers have low power consumption. Electronic paper can be operated longer than a week with only a single recharge, which is definitely longer than conventional displays using in a laptop and tablet computers. In addition, electronic paper is more comfortable to read than conventional displays since it reflects ambient light, and thus it is most likely to be used in portable electronic books.

In Korea ETRI has pioneered in realizing white and black (B/W) e-papers, which are based on micro capsule technologies. As an extension of this result developing color e-papers are under progress. In order to overcome conventional B/W e-papers and color e-papers using color filter, new approach is in pursuit. In order to commercialize e-papers of high performances, it is necessary to develop arrays of thin-film transistors(TFTs) for driving. Therefore, ETRI is working on the solution-based TFT array manufacture on plastic substrates. This research shall eventually be used to realize flexible electronic books.

In the near future, high demand for electronic books will rapidly increase with the development of electronic paper technology. It is also expected that there will be many approaches to electronic paper in the consumer market characterizing different yet attractive properties from LCD and OLED displays. Development of color electronic papers shall expand its application capabilities from text-based electronic books to electronic magazines including photographs and advertisements which require a wide range of colors. Furthermore, slow motion video capability will allow electronic papers to display not only still images such as books, newspapers, and commercials, but also videos and more digital contents. ETRI will thus develop the fundamental technology for implementing these sophisticated interactive applications.

Development of DTV translator system

OLED Lightings

Overview

We are developing core technologies and conceive high end designs of OLED lightings. We aim to be a technological leader in the area of high efficacy white OLED panel and transparent OLED panel. We have comprehensive solutions of OLED efficiency engineering, transparent electrode, transparent wiring, light extraction, and color-tunable OLED.

Luminaire is one of the key issue of in reducing energy consumption, thus, improvement of energy efficiency of electrical lightings should reduce the greenhouse gas. New luminaire technology which do not use hazardous materials such as mercury and lead is required. The OLED lightings are a new type of lighting which has gained significant attention both in research and industrial area. We have developed outstanding technologies for low cost white OLED panel and environmental/emotional OLED lightings. In addition various intellectual properties related to key original technologies for OLED lightings are registered.

We are actively contributing to the international standardization of OLED lightings via IEC TC34 as an effort to progress the OLED lightings.

Study on Printed Devices Technology

Overview

Printed Devices Research Team is developing electronic devices for 13.56MHz RFID tag and a backplane TFT of LCD by printing methodology. Printed electronics is a paradigm shift technology, which is consisted of an extremely low power consumption and a friendly environment. ETRI starts up a printed RFID tag and LCD backplane printed TFT technology. ETRI is focusing the new materials and device technology by printing methodology.

Initial research efforts are toward 13.56MHz RFID tag, which needs new many technology like as a printed rectifier, printed oscillator, and printed memory etc. So for this, a printed CMOS TFT should be developed, first of all, because the performance of a printed TFT doesn't exceed yet more than that of Si-TFT. A high speed printed TFT and a stable memory should be a key elements of printed electronics.

ETRI is focusing another application of low cost processing technology like as a backplane TFT technology of LCD display. Display is a typical red ocean industry. So it needs a new low-cost development technology like a printing methodology. Printing process will satisfy the need of LCD display. Now Inkjet printing is being used in the color filter processing in LCD. Afterwards, this application of printing process will expand to many processes of display. ETRI is focusing the development of a high performance materials and TFT. Printed devices will lead the technology of low cost sensors. flexible solar cell and next generation smart phone etc.

Increased Data-rate technology for the T-DMB

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