Please use this identifier to cite or link to this item: http://dlib.scu.ac.ir/handle/Hannan/145475
Title: Investigation of Photon-Generated Leakage Current for High-Performance Active Matrix Micro-LED Displays
Authors: Ke Zhang;Deng Peng;Wing Cheung Chong;Kei May Lau;Zhaojun Liu
subject: light emitting diode (LED)|photon-generated leakage current|Active matrix (AM) displays
Year: 2016
Publisher: IEEE
Abstract: In this paper, we investigated leakage current generated by light emission of micro-light emitting diode (LED) pixels in active matrix (AM) micro-LED displays. Customdesigned structures of metal cover with different coverage lengths were designed and fabricated to completely eliminate the photongenerated leakage current, thus enhancing the performance of AM driving circuits. Working principle of two transistors and one capacitor AM pixel and requirement of its driving transistors were also systematically discussed for liquid crystal displays, organic LED displays, and LED microdisplays. Transistors with the optimized metal-cover design have an ON/OFF-current ratio of 108, which is two orders of magnitude higher than those without metal cover. This concept was successfully implemented in a high-resolution and fine-pitch AM micro-LED display with a resolution of 400 × 240 and a pixel pitch of 30 μm. Vivid images and movies were presented to show the great potential for wearable applications.
URI: http://localhost/handle/Hannan/145475
ISSN: 0018-9383
1557-9646
volume: 63
issue: 12
More Information: 4832
4838
Appears in Collections:2016

Files in This Item:
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Title: Investigation of Photon-Generated Leakage Current for High-Performance Active Matrix Micro-LED Displays
Authors: Ke Zhang;Deng Peng;Wing Cheung Chong;Kei May Lau;Zhaojun Liu
subject: light emitting diode (LED)|photon-generated leakage current|Active matrix (AM) displays
Year: 2016
Publisher: IEEE
Abstract: In this paper, we investigated leakage current generated by light emission of micro-light emitting diode (LED) pixels in active matrix (AM) micro-LED displays. Customdesigned structures of metal cover with different coverage lengths were designed and fabricated to completely eliminate the photongenerated leakage current, thus enhancing the performance of AM driving circuits. Working principle of two transistors and one capacitor AM pixel and requirement of its driving transistors were also systematically discussed for liquid crystal displays, organic LED displays, and LED microdisplays. Transistors with the optimized metal-cover design have an ON/OFF-current ratio of 108, which is two orders of magnitude higher than those without metal cover. This concept was successfully implemented in a high-resolution and fine-pitch AM micro-LED display with a resolution of 400 × 240 and a pixel pitch of 30 μm. Vivid images and movies were presented to show the great potential for wearable applications.
URI: http://localhost/handle/Hannan/145475
ISSN: 0018-9383
1557-9646
volume: 63
issue: 12
More Information: 4832
4838
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7726032.pdf1.87 MBAdobe PDFThumbnail
Preview File
Title: Investigation of Photon-Generated Leakage Current for High-Performance Active Matrix Micro-LED Displays
Authors: Ke Zhang;Deng Peng;Wing Cheung Chong;Kei May Lau;Zhaojun Liu
subject: light emitting diode (LED)|photon-generated leakage current|Active matrix (AM) displays
Year: 2016
Publisher: IEEE
Abstract: In this paper, we investigated leakage current generated by light emission of micro-light emitting diode (LED) pixels in active matrix (AM) micro-LED displays. Customdesigned structures of metal cover with different coverage lengths were designed and fabricated to completely eliminate the photongenerated leakage current, thus enhancing the performance of AM driving circuits. Working principle of two transistors and one capacitor AM pixel and requirement of its driving transistors were also systematically discussed for liquid crystal displays, organic LED displays, and LED microdisplays. Transistors with the optimized metal-cover design have an ON/OFF-current ratio of 108, which is two orders of magnitude higher than those without metal cover. This concept was successfully implemented in a high-resolution and fine-pitch AM micro-LED display with a resolution of 400 × 240 and a pixel pitch of 30 μm. Vivid images and movies were presented to show the great potential for wearable applications.
URI: http://localhost/handle/Hannan/145475
ISSN: 0018-9383
1557-9646
volume: 63
issue: 12
More Information: 4832
4838
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7726032.pdf1.87 MBAdobe PDFThumbnail
Preview File