We present a novel OLED display panel with high-reliability integrated gate driver circuit using IGZO TFTs. Our gate driver circuit can drive a large-sized OLED display not only for displaying images but also for sensing TFT characteristics for external compensation. It functions correctly even when the threshold voltage of TFTs is negative by reducing leakage currents. We have achieved a life time longer than 60,000 hours in a reliability test and successfully applied it to 55-inch UHD, 65-inch UHD and 55-inch FHD OLED displays, which improves cost-competitiveness of OLED displays against LCDs.

-In this paper, we present novel organic light-emitting diode (OLED) display panel compensation technologies for large-sized ultra-high-definition OLED TVs considering variations of threshold voltage, mobility, channel size, OLED efficiency, and OLED uniformity. Using these technologies, we have successfully launched

MPRT is one of the most important characteristics to enhance the image quality of the TVs. Despite of the fact that OLED device has fast response time, MPRT characteristics of the OLED display is limited by compensation driving method, frame frequency and resolution of the display panel. We present the high image quality OLED displays with integrated gate driver circuit using MPRT enhancement method for large size premium TVs. Its methods to turn emitting pixels off in advance by giving a black data, and the integrated gate driver designed for normal display, black data insertion, and compensation mode. Moreover, it is possible that adjust of the duty of inserting black data. With these results, we successfully enhanced MPRT characteristics of the 55, 65, and 77 inch UHD OLED panels for high image quality OLED TVs.

In this paper, we propose a programmable shift register circuit at a low temperature poly‐silicon (LTPS) backplane suitable for high‐resolution and high‐speed displays. The proposed circuit can control the pulse width at a line‐time unit by a start signal, where two additional clock signals were in use compared to the conventional circuit. Smartspice simulation was conducted to verify the feasibility, proving the pulse width controllability at a line‐time unit. The estimated power consumption is lower than the conventional circuit.