Control component for a current-driven optical media
AssigneeFlexenable Limited
InventorsTiziano Agostinelli, Burag Yaglioglu
Life of this patent
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Abstract
A control component for a current-driven optical media is provided. The control component includes thin film transistors (TFT) for driving pixels of an active matrix optoelectronic device. An additional electrode is provided in a separate conducting layer within the control component in order to add a separate capacitance (C2) that is coupled to the gate electrode of the control component to supplement the capacitance (C1) already coupled between the gate and source electrodes.
Claims21
A control component for controlling a current-driven optical media, the control component comprising a thin film transistor (TFT) for driving a pixel of an active matrix optoelectronic device, the control component comprising:
- a substrate bearing a plurality of conducting layers, each being separated by respective dielectric and/or semiconducting layers, to define a plurality of TFTs and plurality of pixel electrodes, each of the plurality of pixel electrodes being electrically connected to at least one of the plurality of TFTs;
- wherein each TFT comprises:
- first and second ones of the conducting layers defining source/drain electrodes of the TFT and a gate electrode of the TFT, the source/drain and gate electrodes being arranged such that a first storage capacitor (C1) results from the overlap of the source and gate electrode within the TFT, and the drain electrode is connected to a respective pixel electrode;
- third one of the conducting layers arranged to more strongly capacitively couple to the source or gate electrode than the pixel electrode or a semiconductor channel,
- wherein a first plate of a second capacitor (C2) is defined by the third one of the conducting layers within the TFT, and a second plate of the second capacitor (C2) is defined by the gate electrode or the source electrode, the second capacitor (C2) providing an additional storage capacitance to the gate electrode,
- wherein the first storage capacitor and second storage capacitor are electrically connected in parallel, wherein current for the current-driven optical media does not flow through the first plate, and wherein dynamic power is dissipated via the first plate.
Dependencies are inferred from the claim text.