Philippe Le Roy
University of Rennes
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Publication
Featured researches published by Philippe Le Roy.
Journal of The Society for Information Display | 2007
Arc'Hanmael Gaillard; Régis Rogel; Samuel Crand; Tayeb Mohammed-Brahim; Philippe Le Roy; Christophe Prat
— A new voltage-addressed pixel using a multiple drive distribution has been developed to improve, in a simple way, the brightness uniformity of active-matrix organic light-emitting-diode (AMOLED) displays. Moreover, circuits were realized using microcrystalline-silicon (μc-Si) films prepared at 600°C using a standard low-pressure CVD system. The developed p-channel TFTs exhibit a field-effect mobility close to 6 cm2/V-sec. The experimental results show that the proposed spatial distribution of driving TFTs improves the uniformity of current levels, in contrast to the conventional two-TFT pixel structure. Backplane performances have been compared using circuits based on μc-Si and furnace-annealed polysilicon materials. Finally, this technology has been used to make an AMOLED demonstration unit using a top-emission OLED structure. Thus, by combining both an μc-Si active-layer and a current-averaging driver, an unsophisticated solution is provided to solve the inter-pixel non-uniformity issue.
Polymer International | 2006
Bernard Geffroy; Philippe Le Roy; Christophe Prat
Archive | 2006
Philippe Le Roy; Christophe Prat; Pierrick Martin
Archive | 2004
Philippe Le Roy; Christophe Prat; Christophe Féry
Archive | 2004
Philippe Le Roy; Christophe Prat; Fabien Ammardji
Archive | 2004
Philippe Le Roy; Christophe Prat
Archive | 2007
Philippe Le Roy; Christophe Prat; David Vaufray
Archive | 2008
Christophe Prat; David Vaufrey; Philippe Le Roy
Archive | 2007
Christophe Prat; David Vaufrey; Philippe Le Roy
Archive | 2007
David Vaufrey; Philippe Le Roy; Christophe Prat