Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/2839
Título: Driving Scheme Using MIS Photosensor for Luminance Control of AMOLED Pixel
Autor: Vygranenko, Yuri
Fernandes, Miguel
Sazonov, Andrei
Vieira, Maria Manuela Almeida Carvalho
Palavras-chave: Amorphous materials
Thin films
Data: Ago-2013
Editora: IEEE-INST Electrical Electronics Engineers INC
Citação: VYGRANENKO, Yuri; FERNANDES, Miguel; SAZONOV, Andrei; VIEIRA, Manuela - Driving Scheme Using MIS Photosensor for Luminance Control of AMOLED Pixel. Journal of Display Technology. ISSN 1551-319X. Vol. 9, nr. 8 (2013), p. 651-655.
Resumo: This paper presents a new driving scheme utilizing an in-pixel metal-insulator-semiconductor (MIS) photosensor for luminance control of active-matrix organic light-emitting diode (AMOLED) pixel. The proposed 3-TFT circuit is controlled by an external driver performing the signal readout, processing, and programming operations according to a luminance adjusting algorithm. To maintain the fabrication simplicity, the embedded MIS photosensor shares the same layer stack with pixel TFTs. Performance characteristics of the MIS structure with a nc-Si : H/a-Si : H bilayer absorber were measured and analyzed to prove the concept. The observed transient dark current is associated with charge trapping at the insulator-semiconductor interface that can be largely eliminated by adjusting the bias voltage during the refresh cycle. Other factors limiting the dynamic range and external quantum efficiency are also determined and verified using a small-signal model of the device. Experimental results demonstrate the feasibility of the MIS photosensor for the discussed driving scheme.
Peer review: yes
URI: http://hdl.handle.net/10400.21/2839
ISSN: 1551-319X
Aparece nas colecções:ISEL - Eng. Elect. Tel. Comp. - Artigos

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