摘要:
A base unit and a handset comprise a wireless part, a control part, and a transmission (151) and reception part (150), respectively. Communications are switched by either of the two ways: PT switching and tone generation in the base unit, and tone detection in the handset or PTT switching in the base unit, and voice detection in the handset. It is preferable that the transmission (151) and reception (150) part of the handset includes a single transducer type headphone. It is also preferable that photo-coupler (41, 43) and a photo-switch (42) are provided at connection point of signal paths between the transmission (151) and reception part (150), the control part, and between the control part and the wireless part.
摘要:
The invention provides an image shifting device including at least one image shifting part for periodically shifting the position of an optical axis. The image shifting part includes a liquid crystal device 10 for switching a polarization direction of light between two orthogonal directions in accordance with High/Low level of an applied voltage, and a birefringent device 11 having different refractive indexes depending upon the polarization direction of the light. The liquid crystal device 10 and the birefringent device 11 are disposed to transmit light in this order. A liquid crystal layer included in the liquid crystal device 10 is made of a TN liquid crystal layer that satisfies a relationship formula of 0.25
摘要:
An optical shifter includes at least one shifting section that periodically displaces the optical axis of incoming linearly polarized light. The shifting section includes first and second liquid crystal cells and a birefringent element. Each of the liquid crystal cells changes the polarization direction of the incoming light from a first direction into a second direction, or vice versa, responsive to a voltage being applied to the cell. The first and second directions are perpendicular to each other. The birefringent element changes its refractive indices with the polarization direction of the light incident thereon. The first and second cells and the birefringent element are arranged to transmit the incoming light in this order. The liquid crystal layer of the second cell compensates for a disturbance in polarization that was caused while the incoming linearly polarized light was transmitted through the liquid crystal layer of the first cell.
摘要:
A liquid crystal display device of the present invention includes a pair of substrates and a liquid crystal layer provided between the substrates, wherein liquid crystal molecules in the liquid crystal layer have a negative dielectric anisotropy, and the liquid crystal molecules are aligned in a direction substantially vertical to the substrates when no voltage is being applied and are axis-symmetrically aligned in each of a plurality of pixel regions under application of a voltage.
摘要:
A liquid crystal display device of the present invention includes: first and second substrates; a liquid crystal layer interposed between the first and second substrates; a plurality of pillar-like spacers for defining a gap between the first and second substrates; a plurality of electrodes provided on a side of each of the first and second substrates which faces the liquid crystal layer, for applying a voltage through the liquid crystal layer; and a plurality of pixel regions defined by the plurality of electrodes. The liquid crystal layer has liquid crystal molecules having a negative dielectric anisotropy. A vertical alignment layer is provided on a surface of each of the first and second substrates which faces the liquid crystal layer and on surfaces of the pillar-like spacers. The liquid crystal layer includes a plurality of liquid crystal regions defined by the plurality of pillar-like spacers. Each of the pixel regions includes at least one of the liquid crystal regions. The liquid crystal molecules in the liquid crystal regions are aligned substantially perpendicular to the surfaces of the first and second substrates in an absence of an applied voltage and in axial symmetry in a presence of an applied voltage.