32results about How to "Less crosstalk" patented technology

A heat assisted magnetic recording head is provided, which can prevent an effect of a heat in a laser diode when a magnetic recording region is heated by a heating laser beam and which can reduce its size and weight. In the heat assisted magnetic recording head, a recording magnetic pole, a magnetic recording element, a magnetic read element, an optical waveguide, and an irradiating optical waveguide are attached to a floating slider provided below a suspension. The laser diode is arranged on an opposite side of the suspension to the floating slider. The heating laser beam emitted from the laser diode is directed to the irradiating optical waveguide through the optical waveguide, so that a magnetic recording medium is irradiated with the heating laser beam exiting from the irradiating optical waveguide.

The invention provides a miniaturized sensor device including a thin film membrane having a first surface and a second surface, one or more resistive thin film heater / thermometer devices disposed directly or indirectly adjacent to the first surface of the thin film membrane, and a frame disposed directly or indirectly adjacent to the second surface of the thin film membrane, wherein one or more internal surfaces of the frame define at least one cell having at least one opening. The sensor device also includes a thin film layer disposed directly or indirectly adjacent to the frame. The sensor device further includes a sensing layer disposed directly or indirectly adjacent to the thin film membrane.

A novel organic compound that can be used as an electron-injection material or an electron-transport material of a light-emitting element is provided. An organic compound with which a display device having less crosstalk can be obtained is provided. A light-emitting device, a display device, and an electronic device each having less crosstalk are provided. An organic compound including two or three benzo[h]quinazoline rings is provided. In the organic compound, two or three benzo[h]quinazoline rings are preferably included in the substituent including an aromatic ring or a heteroaromatic ring and having 3 to 30 carbon atoms. When two or three benzo[h]quinazoline rings are included in a substituent particularly including a heteroaromatic ring and having 3 to 30 carbon atoms, a high electron-transport property can be obtained.

This invention is generally concerned with digital-to-analogue converters and more particularly relates to techniques for reducing signal dependent loading of reference voltage sources used by these converters.A differential switched capacitor digital-to-analogue (DAC) circuit (500) comprises first and second differential signal circuit portions (500a,b) for providing respective positive and negative signal outputs with respect to a reference level, and has first and second reference voltage inputs (112,114) for receiving respective positive and negative references. Each of said first and second circuit portions comprises an amplifier (102a,b) with a feedback capacitor (104a,b), a second capacitor (106a,b), and a switch (108a,b, 110a,b) to switchably couple said second capacitor to a selected one of said reference voltage inputs to charge the second capacitor and to said feedback capacitor to share charge with the feedback capacitor. The switch of said first circuit portion is further configured to connect said second capacitor (106a) of said first circuit portion to share charge with said feedback capacitor (104b) of said second circuit portion; and the switch of said second circuit portion is further configured to connect said second capacitor (106b) of said second circuit portion to share charge with said feedback capacitor (104a) of said first circuit portion. This enables the second capacitors to in effect be alternately pre-charged to positive and negative signal-dependent nodes so that, on average, signal dependent loading of the references is approximately constant.

A light source (60) is provided in the rear of display means (30), which has a light transmission type display and is made up of pixels (31) for left and right eyes and a first image separation mechanism (32) for the left and right eyes, with a lens unit (41) having a collecting power in a vertical direction and a second image separation mechanism (52) therebetween. The transmission light from the light source (60) spreads in the vertical direction as shown in the drawing. Such spread of the light occurs over the whole of a display surface. It is therefore possible to view the image on the display surface, when the viewer's head is located at any of positions 1 to 4. Accordingly, it becomes possible to make a degree of freedom in vertical (up-and-down) positional movement of the viewer's head.

The invention relates to a multi-fiber core single-mode optical fiber and a manufacturing method thereof. The multi-fiber core single-mode optical fiber comprises claddings and a plurality of fiber cores. The multi-fiber core single-mode optical fiber is characterized in that the fiber cores include a pumping fiber core and a plurality of signal fiber cores, wherein the pumping fiber core is arranged in the center of the optical fiber, the signal fiber cores are distributed on one to three circumferences around the center at equal intervals, so as to form one to three layers of signal fiber cores, sunken claddings tightly cover each signal fiber core, and common claddings are arranged outside the sunken claddings. The multi-fiber core single-mode optical fiber has the characteristics of low signal crosstalk among all of the signal fiber cores, easiness in online light amplification, simplicity and convenience in manufacturing and low manufacturing cost and is suitable for large-scale production. A distributed Raman amplification technique of the multi-fiber core single-mode optical fiber is used in an ultrahigh-speed communication system, so that effective light amplification can be realized, and the harm of a non-linear effect to the performance of a high-speed optical transmission system is further reduced.

This disclosure provides a communication system using a high-altitude aircraft traveling at relatively slow speeds, which can remain airborne for long periods of time. The communication system uses the airplane as a long term high altitude platform that relays signals between one or more ground-stations and / or satellites, aircraft, and the like. The ground-stations have narrow-beam antennas that are aimable, permitting the aircraft to maintain a larger station than would otherwise be possible using the narrow-beam antennas. The ground-stations adjust their aim based on information either gained by tracking the aircraft's signal, or transmitted by the aircraft to the ground-station.

The invention provides a miniaturized sensor device including a thin film membrane having a first surface and a second surface, one or more resistive thin film heater / thermometer devices disposed directly or indirectly adjacent to the first surface of the thin film membrane, and a frame disposed directly or indirectly adjacent to the second surface of the thin film membrane, wherein one or more internal surfaces of the frame define at least one cell having at least one opening. The sensor device also includes a thin film layer disposed directly or indirectly adjacent to the frame. The sensor device further includes a sensing layer disposed directly or indirectly adjacent to the thin film membrane.

The TFT substrate includes (i) gate lines and data lines which are provided in a matrix manner, (ii) a plurality of pixel electrodes each of which has a side which extends in parallel with the gate lines and a side which extends in parallel with the data lines and is shorter than the side, (iii) storage capacitor lines extending in parallel with the gate lines, and (iv) connection lines which are electrically connected to the respective pixel electrodes. In at least one embodiment, the number of the storage capacitor lines is smaller than that of the gate lines. A single one of the storage capacitor lines overlap a plurality of connection lines which are electrically connected to respective of the plurality of pixel electrodes which are arranged in a direction in parallel with the data lines. The single one of the storage capacitor lines and the plurality of connection lines overlap each other via the insulating film so as to form storage capacitor elements.

An object is to provide an organic compound having high heat resistance and a light-emitting element, a light-emitting device, an electronic device, and a display device each having high reliability. Provided are an organic compound having a 2,2′-(pyridine-2,6-diyl)bipyrimidine skeleton in which the 2-positions of pyrimidine skeletons are bonded to the 2- and 6-positions of a pyridine skeleton, and having a structure in which at least one aryl group having a fused structure with 10 to 16 carbon atoms is bonded to the 2,2′-(pyridine-2,6-diyl)bipyrimidine skeleton, and a light-emitting element, a light-emitting device, an electronic device, and a display device each containing the organic compound.

This invention is generally concerned with digital-to-analogue converters and more particularly relates to techniques for reducing signal dependent loading of reference voltage sources used by these converters. A differential switched capacitor digital-to-analogue (DAC) circuit (500) comprises first and second differential signal circuit portions (500a,b) for providing respective positive and negative signal outputs with respect to a reference level, and has first and second reference voltage inputs (112,114) for receiving respective positive and negative references. Each of said first and second circuit portions comprises an amplifier (102a,b) with a feedback capacitor (104a,b), a second capacitor (106a,b), and a switch (108a,b, 110a,b) to switchably couple said second capacitor to a selected one of said reference voltage inputs to charge the second capacitor and to said feedback capacitor to share charge with the feedback capacitor. The switch of said first circuit portion is further configured to connect said second capacitor (106a) of said first circuit portion to share charge with said feedback capacitor (104b) of said second circuit portion; and the switch of said second circuit portion is further configured to connect said second capacitor (106b) of said second circuit portion to share charge with said feedback capacitor (104a) of said first circuit portion. This enables the second capacitors to in effect be alternately pre-charged to positive and negative signal-dependent nodes so that, on average, signal dependent loading of the references is approximately constant.

A liquid crystal display device is constituted such that sub-pixels are disposed in an array form in a first direction and a second direction orthogonal to each other, a plurality of gate lines are disposed in the second direction, an optical element for distributing the light to the second direction is disposed on the liquid crystal display device, liquid crystal molecules of the liquid crystal display device are controlled by an electric field almost in parallel to the surface of the liquid crystal display device, and a data line is disposed to obliquely divide the sub-pixels at a position different from the boundary between the sub-pixels neighboring in the second direction, where the data line can have a small angle with respect to the second direction, and the numerical aperture is not deteriorated greatly even when the lengths of apertures of the sub-pixels in the first direction are constant.

A clock filter circuit (20), which serves for filtering the clock of non-isochronous data signals having a selected one of at least two nominal data rates, has an auxiliary clock source (21) that generates an auxiliary clock signal (27) with a pulse repetition rate which is in the range between the at least two predetermined data rates, a delay line (22).connected to the auxiliary clock source (21) for creating a set of mutually delayed copies of the auxiliary clock signal and a multiplexer (23) that switches in a cyclic order between the delayed copies according to predetermined rules, which depend on the selected data rate to generate a filtered clock signal (28). A control circuit determines whether the rate of the filtered clock (28) signal must be increased or decreased as compared to said data signal and controls the multiplexer (23) to delay or advance the cyclical switching accordingly.

An object is to provide an organic compound having high heat resistance and a light-emitting element, a light-emitting device, an electronic device, and a display device each having high reliability. Provided are an organic compound having a 2,2′-(pyridine-2,6-diyl)bipyrimidine skeleton in which the 2-positions of pyrimidine skeletons are bonded to the 2- and 6-positions of a pyridine skeleton, and having a structure in which at least one aryl group having a fused structure with 10 to 16 carbon atoms is bonded to the 2,2′-(pyridine-2,6-diyl)bipyrimidine skeleton, and a light-emitting element, a light-emitting device, an electronic device, and a display device each containing the organic compound.

A proximity sensor and a mobile device using the same are provided. The proximity sensor includes a circuit board, an emitter package, a receiver package, a plastic casing and a lens. The emitter package is disposed on the circuit board and includes an emitter and an emitter housing. The receiver package is disposed on the circuit board and includes a receiver and a receiver housing. The plastic casing covers the emitter package and the receiver package. The plastic casing includes a first opening corresponding to the emitter package and a second opening corresponding to the receiver package. The first opening has a first geometric centerline and the second opening has a second geometric centerline. The height of the emitter package is smaller than that of the receiver package, and the emitter is disposed between the first geometric centerline and the second geometric centerline.

An improved optical switch utilizes one polarization modulator, with the beam components traversing it twice. Because of the twice traverse, the extinction ratio of the switch is doubled without the addition of another polarization modulator, thus avoiding the costs of additional optical components. With no additional components, the switch is more compact than conventional switches with the same extinction ratio. Fewer components also result in more thermal and long-term stability and less crosstalk.

The problem to be solved by the present invention is to provide an infrared microscope with good measuring accuracy and less crosstalk.The infrared microscope 10 comprises a light source 12, an irradiating unit 14 for irradiating the infrared light from the light source to a sample 16, a focusing unit 18 for focusing the infrared light transmitted through or reflected by the sample 16, and a detector 20 for detecting the focused infrared light. The irradiating unit 14 comprises a first aperture 24, and the first aperture is disposed at a position where the infrared light from the light source passes therethrough. The focusing unit 18 comprises a second aperture 30, and the second aperture is disposed at an imaging position of the infrared light at the first aperture 24. The first aperture has a plurality of holes, and the holes are disposed at intervals corresponding to the arrangement of the light-receiving elements provided in the detector 20 to detect the infrared light as a detecting light. The second aperture 30 has holes that have the same size and arrangement as the first aperture 24.

An improved optical switch utilizes one polarization modulator, with the beam components traversing it twice. Because of the twice traverse, the extinction ratio of the switch is doubled without the addition of another polarization modulator, thus avoiding the costs of additional optical components. With no additional components, the switch is more compact than conventional switches with the same extinction ratio. Fewer components also result in more thermal and long-term stability and less crosstalk.

According to some preferred embodiments of the present invention, a semiconductor memory device includes an array of memory cells and plural pairs of complementary bit lines, each pair of the complementary bit lines being connected to the memory cells arranged in the same column. The array is divided into plural memory blocks each including plural memory cells arranged in the same column. The corresponding complementary bit lines of the plural memory blocks are connected to corresponding common complementary data lines, respectively. Some pairs of the complementary data lines are crossed at least one time so that the complementary data lines of each pair of the some pairs of the complementary data lines are reversed in position and that the crossed data line and a non-cross data line are arranged alternately whereby crosstalk to be generated between adjacent data lines are reduced.

An improved optical switch utilizes one polarization modulator, with the beam components traversing it twice. Because of the twice traverse, the extinction ratio of the switch is doubled without the addition of another polarization modulator, thus avoiding the costs of additional optical components. With no additional components, the switch is more compact than conventional switches with the same extinction ratio. Fewer components also result in more thermal and long-term stability and less crosstalk.