30-inch 4K Rollable AM-OLED Display

Sonoda, Tohru; Murashige, Shogo; Tanaka, Kihachiro; Takase, Kenji; Katoh, Hiromi; Kataoka, Yuki; Usui, Tomohiro; Okada, T.; Shimizu, Takahisa

doi:10.23919/am-fpd49417.2020.9224484

Cited by 9 publications

(11 citation statements)

References 8 publications

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“…An organic layer was deposited in between the hybrid backplane and the OLED layers. Details of the OLED fabrication have been explained elsewhere 13 . By laser lift‐off (LLO), the PI is mechanically released by peeling off the plastic substrate from the rigid carrier.…”

Section: Methodsmentioning

confidence: 99%

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Reliability improvement of IGZO‐TFT in hybrid process with LTPS

et al. 2021

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An AMOLED panel using hybrid backplane technology based on p-type low temperature polycrystalline silicon (p-LTPS) and n-type indium-galliumzinc-oxide (n-IGZO) thin-film transistors (TFTs) has been successfully manufactured. New pixel and Gate-on-Array (GOA) circuits were designed and fabricated using this technology. GOA with CMOS inverter is realized by utilizing both IGZO and p-LTPS. The hybrid backplane AMOLED panel can operate between 1 and 120 Hz, which enables both high refresh rate and low standby power display applications. Furthermore, the AMOLED panel lifetime has markedly enhanced by improving IGZO TFT's uniformity and reliability.

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Section: Methodsmentioning

confidence: 99%

“…Details of the OLED fabrication have been explained elsewhere. 13 By laser lift-off (LLO), the PI is mechanically released by peeling off the plastic substrate from the rigid carrier. Then other driving parts such as chip on film (COF) and functional films such as a polarizer and support films were attached to the panels.…”

Section: Tft Structurementioning

confidence: 99%

Reliability improvement of IGZO‐TFT in hybrid process with LTPS

et al. 2021

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“…Most existing flexible displays employ organic light-emitting diodes (OLEDs). Foldable smartphones with OLED displays [1][2][3] are becoming widely available and the first rollable televisions [4] have appeared on the market. Flexible displays widen the applications of electronic displays and greatly reduce manufacturing costs, as they allow for roll-to-roll fabrication [5].…”

Section: Introductionmentioning

confidence: 99%

Flexible CdSe/ZnS Quantum-Dot Light-Emitting Diodes with Higher Efficiency than Rigid Devices

Kim

Kwon

et al. 2022

Micromachines

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Fabrication of high-performance, flexible quantum-dot light-emitting diodes (QLEDs) requires the reliable manufacture of a flexible transparent electrode to replace the conventional brittle indium tin oxide (ITO) transparent electrode, along with flexible substrate planarization. We deposited a transparent oxide/metal/oxide (OMO) electrode on a polymer planarization layer and co-optimized both layers. The visible transmittance of the OMO electrode on a polyethylene terephthalate substrate increased markedly. Good electron supply and injection into an electron-transporting layer were achieved using WOX/Ag/ WOX and MoOx/Ag/MoOX OMO electrodes. High-performance flexible QLEDs were fabricated from these electrodes; a QLED with a MoOX/Ag/ MoOX cathode and an SU-8 planarization layer had a current efficiency of 30.3 cd/A and luminance more than 7 × 104 cd/m2. The current efficiency was significantly higher than that of a rigid QLED with an ITO cathode and was higher than current efficiency values obtained from previously reported QLEDs that utilized the same quantum-dot and electron-transporting layer materials as our study.

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“…An organic layer was deposited in between the hybrid backplane and the OLED layers. Details of the OLED fabrication have been explained elsewhere 16 . By laser lift‐off (LLO), the PI is mechanically released by peeling off the plastic substrate from the rigid carrier.…”

Section: Methodsmentioning

confidence: 99%

“…Details of the OLED fabrication have been explained elsewhere. 16 By laser lift-off (LLO), the PI is mechanically released by peeling off the plastic substrate from the rigid carrier. Then other driving parts such as chip on film (COF) and functional films such as a polarizer and support films were attached to the panels.…”

Section: Methodsmentioning

confidence: 99%

Advanced hybrid process with back contact IGZO‐TFT

et al. 2022

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We propose a new structure hybrid backplane technology with back contact IGZO‐TFT and LTPS. In this structure, IGZO is directly connected with intermediate metal to reduce the number of layers. The patterning process of IGZO and intermediate metal was optimized to realize superior IGZO/metal contact structure. The uniformity of contact resistance over a large area has been address for hybrid backplane. The characteristics of IGZO‐TFTs with high uniformity and reliability were confirmed. High‐quality AMOLED panels with new structure backplane have been adopted at smartphone with 6.6 in. display after severe reliability tests. We believe that the proposed structure would be useful for the mass‐production of OLED display with high quality and low cost.

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30-inch 4K Rollable AM-OLED Display

Cited by 9 publications

References 8 publications

Reliability improvement of IGZO‐TFT in hybrid process with LTPS

Reliability improvement of IGZO‐TFT in hybrid process with LTPS

Flexible CdSe/ZnS Quantum-Dot Light-Emitting Diodes with Higher Efficiency than Rigid Devices

Advanced hybrid process with back contact IGZO‐TFT

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