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2025.01.23 13:23

ICEIC 2025, Osaka, Japan

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ICEIC 2025, Osaka, Japan

January 19 - January 22, 2025 (Sun. - Wen.), Osaka International House


채연 발표_편집본.jpg


Design of Low Power Scan Driver Based on a-InGaZnO TFTs for Frame Masking Technique with Extra Clock Signal Modulation


Chaeyeon Park, Dongseok Kim, Hyunwoo Kim, and Hojin Lee


Abstract


We proposed a novel low-power scan driver using frame masking techniques, which selectively disables scan driver outputs based on the type of content, thereby reducing unnecessary pixel updates. The proposed frame masking drive effectively reduces power consumption not only for the scan driver but also for the display panel itself.

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2022.11.11 20:29

IMID 2022, Pusan, Korea

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조회 수 164 추천 수 0 댓글 0
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IMID 2022, Pusan, Korea

August 23 - August 26, 2022 (Tue. - Fri.), Bexco


KakaoTalk_20221111_165637141.jpg


Adaptive Frequency Driving Scan Driver Combined with Logic Circuit based on a-InGaZnO TFTs

Jinho Moon, Eseudeo Yun, Yongchan Kim, and Hojin Lee


Abstract

  

Recently, due to the interest on flexible, wearble, and portable electronics as futre technologies, the demand for high-resolution display is expended. Although, faster frame rate and smaller area for the display is required, increased power consumption is incurred in high-performance display. Typically, for high-resolution displays, amorphous indium gallium zinc oxide thin film transistor (a-InGaZnO TFT) is actively researched because of its’ visible transparency, good uniformity, and utmost low off-current advantages rather than low temperature polycrystalline silicon (LTPS) TFT and amorphous silicon (a-Si) TFT. However, the a-InGaZnO TFT operates in depletion-mode because VTH has negative values by the different indium component ratio and by the electrical characteristic variation due to the different bias stress such as illumination and bias stress. In this paper, we propose a adaptive frequency driving scan driver based on a-InGaZnO TFT with depletion-mode operation.

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2024.09.02 13:56

IMID 2024, Jeju, Korea

MEDIS
조회 수 146 추천 수 0 댓글 0
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IMID 2024, Jeju, Korea

August 20 - August 23, 2024 (Tue. - Fri.), ICC Jeju


KakaoTalk_20240826_184724886_05.jpg

A Novel Scan Driver Based on a-IGZO TFTs with Extra Clock Modulation for Extremely Low Power Consumption


Dongseok Kim, Hyunwoo Kim, Jinho Moon, Yongchan Kim, and Hojin Lee


Abstract

 In this paper, we propose a scan driver with an extra clock signal using amorphous indium-gallium-zinc-oxide (a-IGZO) thin-film transistors (TFTs). By employing extra clock signal modulation-based frame masking driving and constant DC driving methods, the proposed scan driver achieves extremely low power consumption while simultaneously reducing the power consumption of the display panel. The proposed novel scan driver is suitable for operating ultra-low-power displays, such as always-on displays.

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2024.09.02 13:40

IMID 2024, Jeju, Korea

MEDIS
조회 수 120 추천 수 0 댓글 0
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IMID 2024, Jeju, Korea

August 20 - August 23, 2024 (Tue. - Fri.), ICC Jeju


KakaoTalk_20240902_105530006_08.jpg

Silicon-integrated Photolithography of Small-molecule Phosphorescent Emitter for Ultrahigh-resolution Micro-OLEDs 

Ryungyu Lee, Keun-Yeong Choi, Hyukmin Kweon, Borina Ha, Changhee Lee, Soyeon Lee, Do Hwan Kim, and Hojin Lee


Abstract

 In this paper, we propose an ultrahigh-resolution organic lightemitting diodes (OLEDs) pixels patterned by conventional photolithography through by incorporating silicone into phosphorescent small-molecule networks. This siliconeintegrated phosphorescent organic light-emitting diode (SIphOLED), in which silicone molecules are homogeneously crosslinked with small-molecule light-emitting materials, can effortlessly achieve to 3,000 PPI ultrahigh-resolution patterns using the photolithography process.

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2024.09.02 13:45

IMID 2024, Jeju, Korea

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조회 수 76 추천 수 0 댓글 0
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IMID 2024, Jeju, Korea

August 20 - August 23, 2024 (Tue. - Fri.), ICC Jeju


KakaoTalk_20240902_105202000_03.jpg

Novel Pixel Circuit Compensating for Sub-threshold Swing Variations and Threshold Voltage Shifts of Depletion Mode a-IGZO TFT in AMOLED Displays 


Hyunwoo Kim, Jinho Moon, Yongchan Kim, and Hojin Lee


Abstract

 We proposed a novel pixel circuit for AM-OLED displays with double gate structure based on a-IGZO TFTs. The proposed pixel circuit compensates for the operation in depletion mode and the variation in VTH and S∙S of the driving TFT.

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