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Numan, N. (author), Haar, F.T. (author), Cesar, P. (author)Head-mounted displays (HMDs) are an essential display device for the observation of virtual reality (VR) environments. However, HMDs obstruct external capturing methods from recording the user’s upper face. This severely impacts social VR applications, such as teleconferencing, which commonly rely on external RGB-D sensors to capture a...conference paper 2021
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Berzins, J. (author), Fasold, S. (author), Pertsch, T. (author), Bäumer, S.M.B. (author), Setzpfandt, F. (author)Digital color imaging relies on spectral filters on top of a pixelated sensor, such as a CMOS image sensor. An important parameter of imaging devices is their resolution, which depends on the size of the pixels. For many applications, a high resolution is desirable, consequently requiring small spectral filters. Dielectric nanostructures, due to...article 2019
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Malinowski, P.E. (author), Ke, T.-H. (author), Akkerman, H. (author), Nakamura, A. (author), Shanmugam, S. (author), van Breemen, A. (author), Velpen, D.V. (author), Vandenplas, E. (author), Hagelsieb, L.M. (author), Verscheuren, L. (author), Genoe, J. (author), Dehaene, W. (author), Kronemeier, A.J. (author), Steudel, S. (author), Gelinck, G. (author), Heremans, P. (author)Patterning organic materials by photolithography enables not only high-resolution, side-by-side RGB OLED arrays, but also the introduction of organic photodetector in the same frontplane. We show patterned active matrix displays processed on flexible backplane. Furthermore, we demonstrate OPD patterning proof-of-concept. These are the building...conference paper 2019
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Berzins, J. (author), Silvestri, F. (author), Gerini, G. (author), Setzpfandt, F. (author), Pertsch, T. (author), Bäumer, S.M.B. (author)Digital imaging has been steadily improving over the past decades and we are moving towards a wide use of multi- and hyperspectral cameras. A key component of such imaging systems are color filter arrays, which define the spectrum of light detected by each camera pixel. Hence, it is essential to develop a variable, robust and scalable way for...conference paper 2018
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Malinowski, P.E. (author), Ke, T.H. (author), Nakamura, A. (author), Liu, Y.H. (author), van der Velpen, D. (author), Vandenplas, E. (author), Papadopoulos, N. (author), Kronemeijer, A.J. (author), van der Steen, J.L. (author), Steudel, S. (author), Kuo, C.C. (author), Huang, Y.Y. (author), Chen, Y.H. (author), Yeh, M.H. (author), Gelinck, G. (author), Heremans, P. (author)High-resolution RGB organic light-emitting diode frontplane is a key enabler for direct-view transparent augmented reality displays. In this paper, we demonstrate 1250 ppi passive displays and semi-transparent active displays. Organic light-emitting diode photolithography can provide pixel density above 1000 ppi while keeping effective emission...article 2018
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Malinowski, P.E. (author), Ke, T. (author), Nakamura, A. (author), Vicca, P. (author), Kronemeijer, A.J. (author), Ameys, M. (author), van der Steen, J.L. (author), Steudel, S. (author), Kamochi, Y. (author), Iwai, Y. (author), Gelinck, G. (author), Heremans, P. (author)This paper describes the potential of hi-res display fabrication using OLED photolithography. We demonstrate 1250 ppi multicolor arrays, pixel scaling down to 3 μm pitch, integration in active displays, and improving lifetime after patterning (200 hours T75, smOLEDs). Photolithography can enable low-cost, high resolution displays for the 8K – VR...conference paper 2017
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Malinowski, P.E. (author), Ke, T. (author), Nakamura, A. (author), Chang, T.-Y. (author), Gokhale, P. (author), Steudel, S. (author), Janssen, D. (author), Kamochi, Y. (author), Koyama, I. (author), Iwai, Y. (author), Heremans, P. (author)In this paper, side-by-side patterning of red, green and blue OLEDs is demonstrated. To achieve 640 ppi arrays with 20 µm subpixel pitch, chemically amplified, i-line photoresist system with submicron resolution was used. These results show feasibility of obtaining full-color displays with ultra-high resolution.article 2015