Abstract:
The described technology relates generally to a thin film transistor for a display device and an organic light emitting diode display device including the same. An exemplary embodiment provides a thin film transistor for a display device, including: a substrate; a semiconductor that is disposed on the substrate and includes a channel, and a source region and a drain region disposed at opposite sides of the channel; a gate insulating layer that includes a first gate insulating layer disposed on the substrate and the semiconductor, and a second gate insulating layer disposed on the first gate insulating layer and overlapping the channel; a gate electrode disposed on the second gate insulating layer; an interlayer insulating layer disposed directly on the first gate insulating layer and the gate electrode; and a source electrode and a drain electrode that are disposed on the interlayer insulating layer and are connected to the semiconductor, wherein a thickness of a portion of the gate insulating layer overlapped with the gate electrode may be larger than that of a portion of the gate insulating layer overlapped with the source region and that of a portion of the gate insulating layer overlapped with the drain region.
Abstract:
An optical modulation device is provided. The optical modulation device includes first and second plates facing each other, a liquid crystal layer interposed between the first and second plates, and first and second electrodes. The liquid crystal layer includes a plurality of liquid crystal molecules. The first plate includes a first aligner. The second plate includes a second aligner. A first alignment direction of the first aligner and a second alignment direction of the second aligner are substantially parallel to each other. The first and second electrodes extend to cross each other. The first and second electrodes are insulated from each other. The second electrode extends to cross the second alignment direction. An angle θP formed between a vertical axis of the second alignment direction and an extending direction of the second electrode is a value between 5° and 45°.
Abstract:
The present invention provides an optical path converting element. The optical path converting element includes a first layer, a second layer, and a liquid crystal layer. The first layer includes at least one first-layer electrode. The second layer includes at least one second-layer electrode. The liquid crystal layer is interposed between the first layer and the second layer. Liquid crystal of the liquid crystal layer has a first state or a second state in accordance with a voltage applied to the first-layer and second layer electrodes. The liquid crystal of the liquid crystal layer is vertically aligned in the first state. The liquid crystal of the liquid crystal layer is horizontally aligned in the second state. The liquid crystal of the liquid crystal layer is spirally aligned in a first direction in the second state. The liquid crystal of the liquid crystal layer has chirality.