| In modern information society, the display devices play an important role. CRT (cathode ray tube) display has been existed more than 100 years and is facing the strong challenge from FPD (flat-panel display). LCD (liquid-crystal display) is the dominant FPD technology. Presently, OLED (organic light-emitting device) display is of great interest due to high brightness, fast response time, high efficiency, low-voltage driving, low power dissipation, wide visual angle, thin and light-weight etc. and OLED is regarded as the technology which is one of the best technologies. Many famous corporations in the world have involved in OLED display technology, such as Kodak, Pioneer Corporation, Philips and so on. Although many achievements have been acquired in OLED structure material, production technology, driving methods, OLED technology is just at the beginning and it will be one of the most important displaying technology in three or five years. OLED has given an equal chance for every company and country, and it is very important for our country to develop displaying technology of our own. Much work of this paper has been done in AM-OLED technology, mainly focusing on AM-OLED pixel circuit structure (composed of P-channel TFT) design and parameters assurance, AC-driving pixel circuit design and applying, on-screen driving circuit (composed of P-channel TFT) design and integrated peripheral driving circuit applying, and simulation work on this design using AIM-SPICE and H-SPICE. The main work and content are sum up as follows: The dissertation consists of seven chapters. In chapter 1, it briefly introduces history and present research situation of OLED, our progress information on OLED technology, and it has show brilliant future of OLED. Research content and principal work have been proposed by comparing PM-OLED and AM-OLED driving method and by comparing P-channel TFT and CMOS-TFT. In chapter 2, we introduce Level62-RPI model and its characters of thin-film transistor that is main component of driving circuit. All is primary for following chapters. Research work which is needed has been focused on TFT output character, kink effect and breakdown character. In chapter 3, much research work has been carried on AM-OLED pixel driving circuit composed of P-channel TFT. Its analysis is mainly on two-TFT voltage-driving pixel circuit, precise parameter assurance according to the need of display and simulation work using equivalent OLED model. And we have improved conventional pixel circuit and the improved circuit's area is smaller, which is beneficial to display aperture ratio. AC-driving pixel driving circuit has been studied and analyzed, and ac-driving pixel driving circuit using P-channel TFT has been realized. It is very important for lengthening OLED lifetime and design of reasonable pixel driving circuit. In chapter 4, pixel protection circuit has been demonstrated. We have design the structure of pixel circuit and chosen circuit parameter precisely to limit the parasitic effect on the analysis of "clock feed-through"and "data feed-through". In chapter 5, the on-screen driving circuits composed of P-channel TFT have been designed, including inverter, shift register, transmission gate and simulated using simulation software. In chapter 6, we have done some work on large-scale integrated OLED display technology. Row and line electrode driving circuit, including shifter, inverter and Block circuits have been designed using P-channel TFT and much simulation work has been done also. We have simply explained time-delay effect in displayer and given the simple resolution according to its reason. In chapter 7, a brief summation is set out and the following research direction and future work are proposed. We have carefully collected and cleaned up a lot of information and literatures, given much explain on TFT, preparing for future research work. The...
|
PDF Full Text Request