58.2: 55‐inch OLED TV using Optimal Driving Method for Large‐Size Panel based on InGaZnO TFTs

Yoon, Jae Woong; Hong, Sung Pil; Kim, Ji-Hun; Kim, Dae-Hyun; Tani, Ryosuke; Nam, Woo‐Jin; Song, Byung-Chan; Kim, Jin-Mog; Kim, Pan-Youl; Park, Kwan-Ho; Oh, Chang‐Ho; Ahn, Byung‐Chul

doi:10.1002/j.2168-0159.2014.tb00224.x

Cited by 21 publications

(15 citation statements)

References 6 publications

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“…Here, one thing needs to be pointed out that the simple 2T1C circuits in LTPS and amorphous IGZO OLED displays often suffered from the nonuniform display behavior because of the TFT threshold voltage variation issue. To address this problem, more complex compensation circuits such as 6T1C‐3T2C have been used for more practical, higher‐resolution prototypes and commercial products …”

Section: Metal Oxide Tftsmentioning

confidence: 99%

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Zhu

Shin

Liu

et al. 2019

Adv Funct Materials

168

130

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Studies on printable semiconductors and technologies have increased rapidly over recent decades, pioneering novel applications in many fields, such as energy, sensing, logic circuits, and information displays. The newest display technologies are already turning to metal oxide semiconductors, i.e., indium gallium zinc oxide, for the improvements needed to drive active matrix organic light-emitting diodes. Convenience and portability will be realized with flexible and wearable displays in the future. This report summarizes recent progress on the development of solution-processed thin film transistors, especially those deposited at low temperatures for next-generation flexible smart displays. The first part provides an overview on the history and current status of displays. Then, recent advances in state-of-the-art solution-processed transistors based on different semiconductors are presented, including metal oxides, organic materials, perovskites, and carbon nanotubes. Finally, conclusions are drawn and the remaining challenges and future perspectives are discussed. a large common cathode (opaque metal). This means that the light emission goes through the backplane and the TFT arrays are able to block the light, resulting in the reduced emission fill factor of the display. This mode is also called bottom emission. One effective way to avoid the light obstruction from TFTs in the backplane is to use top-emitting OLEDs, which have a transparent cathode. [2] In 2004, Pennsylvania State University demonstrated the first flexible phosphorescent AMOLED display with hydrogenated amorphous silicon on a 4 in. polyimide (PI) substrate. [7] One year later, a 48 × 48 organic pentacene TFT-driven AMOLED display on a polyethylene terephthalate (PET) substrate was reported by the same group. [8] In 2005, by employing a top-emission structure, researchers at Sony Corp. demonstrated the first full-color imaging on a flexible AMOLED with a pixel resolution of 80 ppi. [9] In 2013, Samsung Electronics showed curved OLED TVs for the first time. Two years later, the same company unveiled a smartphone with a curved edge display (Galaxy S6 Edge), which used touch sensors to improve the user interface and device design. Most recently, LG Display succeeded in developing the world's first large-size 77 in. transparent and flexible OLED display, which could be rolled up to a radius of 80 mm. [10] The ideal flexible AMOLED backplane should be robust, rollable/bendable, capable of complementary metal oxide semiconductor (CMOS) operation, and should lend itself to low-cost manufacturing. To advance toward next-generation flexible AMOLED displays, two key technological goals should be satisfied during fabrication. One is to develop TFT backplanes with good uniformity, stability, and electrical performance. Amorphous silicon (a-Si) TFTs are well known for their uniform electrical characteristics (µ FE < 1 cm 2 V −1 s −1 and I on /I off > 10 6 ) and have achieved great success in flat-panel LCD displays. However, the relatively low µ FE and the lig...

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Section: Metal Oxide Tftsmentioning

confidence: 99%

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Zhu

Shin

Liu

et al. 2019

Adv Funct Materials

168

130

View full text Add to dashboard Cite

show abstract

“…When the external compensating circuit is used, the number of components in a pixel circuit is smaller than those in the internal compensating circuit [2,3], whereas the size of a peripheral circuit is larger than that in the internal compensating circuit. Furthermore, the external compensating circuit facilitates the compensation for mobilities as well as the compensation for threshold values.…”

Section: Introductionmentioning

confidence: 99%

5‐3: OLED Display Device Mounted with a Novel External Compensating Circuit

Toyotaka

Takahashi

R.Yamamoto

et al. 2018

Symp Digest of Tech Papers

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“…While OLED TVs adopt an external compensation technique [4] [5], pixel structures with in-pixel compensation scheme are preferable for small-sized OLED displays. High mobility comparable to LTPS is desirable for an acceptable compensation accuracy [6].…”

Section: Introductionmentioning

confidence: 99%

7‐4: Invited Paper: Internal Compensation Type OLED Display Using High Mobility Oxide TFT

Jang¹,

Kim²,

Choi³

et al. 2017

Symp Digest of Tech Papers

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An internal compensation type OLED display with high mobility oxide TFT is presented. The pixel circuit for self-compensation of threshold voltage variation and the integrated gate drivers (GIP) were fabricated using coplanar-structure oxide TFTs on both glass and PI substrates. The 5.5-in. FHD display panels show marked uniformity and durability to image sticking with compensation. The circuits have sufficient stability during operation at 60 o C for over 1,000 hours.

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58.2: 55‐inch OLED TV using Optimal Driving Method for Large‐Size Panel based on InGaZnO TFTs

Cited by 21 publications

References 6 publications

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

5‐3: OLED Display Device Mounted with a Novel External Compensating Circuit

7‐4: Invited Paper: Internal Compensation Type OLED Display Using High Mobility Oxide TFT

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