Session and scheduling information are listed below. Select a session from the list and press "Go" to view the abstracts for that session.
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Session
68
: Emissive Active Matrix Displays |
Emissive, Micro-LED, and Quantum-Dot Displays
; Active Matrix Devices
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Thursday, May 16 / 01:30 PM - 2:30 PM / San Jose Convention Center, 220C
Chair:
Seth Coe-Sullivan, NS Nanotech, Rolling Hills Estate, CA US
68.1 - Distinguished Paper: An Active-Matrix MicroLED Display Based on Monolithic Integration with IGZO Backplane (1:30 PM - 1:50 PM)
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Oliver Durnan, Vikrant Kumar, Reem Alshanbari, Megan Noga, Ioannis Kymissis
Columbia University New York NY US
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This paper demonstrates a method of monolithically integrating GaN microLEDs with an IGZO TFT backplane to produce an active-matrix microdisplay. After discussion of the fabrication process, individual LEDs, TFTs, and the integrated system are characterized. Results demonstrate a 32 x 32 pixel, 78.4ppi microdisplay with luminance exceeding 1,500 nits.
68.2 - A New PWM MicroLED Pixel Circuit Using LTPO TFTs with Threshold Voltage and IR-Drop Compensations (1:50 PM - 2:10 PM)
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Junyeong Kim, Jin Jang
Kyung Hee University Seoul South Korea
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The authors propose a novel pulse-width modulation (PWM) microLED pixel circuit utilizing LTPO TFTs. It can compensate for VTH variation, ensuring uniform microLED current pulse width and amplitude. In addition, the circuit exhibits excellent IR-drop compensation. The fabricated LTPO pixel circuit is found to perform PWM with VTH and IR-drop compensations.
68.3 - Distinguished Paper: A 4.7-in. 650-ppi AM-QLED Display Prepared by Direct Photolithography (2:10 PM - 2:30 PM)
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Di Zhang, Zhuo Li, Shaoyong Lu, Dong Li, Zhuo Chen, Yanzhao Li, Xinguo Li, Xiaoguang Xu
BOE Technology Group Co., Ltd. Beijing China
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In this work, an efficient QD-photosensitive ligand system is designed. By direct photolithography, RGB pixel arrays with a single sub-pixel size of 39 um × 5 um are successfully prepared on patterned PM substrates. While illuminated separately, there are no residual QD emission peaks from neighbor sub-pixels in electroluminescence spectra. Experience on the PM substrate guides the successful preparation of a 4.7-in. 650-ppi AM-QLED display. This is the first AM-QLED prototype prepared by direct lithography.