46results about How to "Excellent high-speed response" patented technology

The present invention relates to: a nematic liquid crystal composition with negative dielectric anisotropy ([delta][epsilon]) which is useful as a liquid crystal display material; and a liquid crystal display element using the same. The present invention provides a liquid crystal composition with which drop marks are not easily generated at the time of production and which does not impair the various properties as a liquid crystal display element such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, and gamma1, or burn-in properties of a display element. This liquid crystal display element has fast response, develops less burn-in, and generates less drop marks caused by production thereof, and thus is useful especially for a VA mode or PSVA mode liquid crystal display element for an active matrix drive, and can be applied to a liquid crystal display element for a liquid crystal TV, monitor, etc.

The invention relates to a liquid crystal aligning agent, a liquid crystal display device, and a polyorganosiloxane. A liquid crystal aligning agent capable of forming a liquid crystal aligning film with great liquid crystal aligning performance, exhibiting great electrical performance, and especially great voltage holding rate and afterimage characteristic. The liquid crystal aligning agent contains a special polysiloxane containing a group having steroid skeleton and a group represented by the following formula (1A): -(AII)a-X-R. In the formula (1A), R is an alkyl group optionally substituted by fluorine having 4-20 carbon atoms, AII is a cyclohexylene group or a phenylene group, X is a single bond, an oxygen atom, a sulphur atom, -COO- or -OCO-, a is an integer from 0 to 3. When a plurality of AII exist, they can be identical to each other, or different from each other.

The invention discloses a high voltage-resistant permanent magnet-shield high speed switching electromagnet. The high voltage-resistant permanent magnet-shield high speed switching electromagnet comprises a push rod (6) and a shell (1), an armature (8), a guide sleeve (4) and the like which are all magnetic conductors, wherein the outer surface of the guide sleeve (4) is provided with an annular trapezoidal groove (41); the bottom (412) in the centre of the annular trapezoidal groove (41) is provided with an annular permanent magnet (9); an inner cavity (40) of the guide sleeve (4) is provided with the armature (8) which is connected with the guide sleeve (4) in a sliding way; the push rod (6) is fixedly connected with the armature (8) after penetrating through the bottom (10) of the shell (1) and a trapezoidal guide sleeve channel (42); a returning spring (5) is arranged in the trapezoidal guide sleeve channel (42); and one end of the returning spring (5) is pressed against the shell (1) while the other end is pressed against the armature (8). The high voltage-resistant permanent magnet-shield high speed switching electromagnet has the characteristics of capacity of increasing output electromagnetic force and increasing response speed.

Provided is a LCD device having excellent high-speed responsiveness. This LCD device contains a polymer or a copolymer in a liquid crystal composition that is sandwiched between two transparent substrates, at least one of which has an electrode, and the quantity of polymer or copolymer contained is 1 mass% to less than 40 mass% of the total quantity obtained by adding the liquid crystal composition and the polymer or copolymer. This LCD device can be used in a variety of operational modes of TN, STN, ECB, VA, VA-TN, IPS, FFS, pi cell, OCB, cholesteric liquid crystals and the like.

Provided are a liquid crystal display element, in which dropping stains do not occur easily during manufacturing without causing degradation of various characteristics for the liquid crystal display element such as dielectric anisotropy, viscosity, upper limit temperature for nematic phase, and rotational viscosity (gamma1) or in burn-in characteristics for the liquid crystal display element, and a method for manufacturing the same. This liquid crystal display element (10) is characterized by having a liquid crystal composition layer (13) sandwiched between a first substrate (11) and a second substrate (12) and vertical orientation films (16, 17) that are formed from a cured product of a polymerizable liquid crystal compound and also by a liquid crystal composition constituting the liquid crystal composition layer (13) containing a compound represented by the general formulas (I) and (II).

The problem to be resolved by the present invention is to provide a liquid crystal composition suitable for a liquid crystal display element that achieves a stable spray amount of liquid crystal material in the ODF process that does not easily cause drip marks during manufacturing, and without deterioration of display element burning properties and other various properties of a liquid crystal display element such as dielectric anisotropy, viscosity, upper limit temperature of the nematic phase, nematic phase stability at low temperature, γ1, and the like, and to provide a liquid crystal display element that uses this liquid crystal composition. The present invention provides a liquid crystal composition with negative dielectric anisotropy that contains at least one type of compound expressed by general formula (I), that contains at least one type of compound expressed by general formula (II), and that contains the compound expressed by formula (IIIb-1). Furthermore, in addition, a liquid crystal display element that uses this liquid crystal composition is provided.

Provided is an FFS-type liquid crystal display element which uses a liquid crystal composition containing at least one type of compound selected from the group of compounds represented by general formula (I), at least one type of compound selected from the group of compounds represented by general formula (II), and at least one type of compound selected from the group of compounds represented by general formula (III), as a liquid crystal display element which uses a liquid crystal composition having negative dielectric anisotropy, whereby it is possible to realize excellent display characteristics through use thereof in an FFS-mode liquid crystal display element without adversely affecting liquid crystal display element characteristics such as dielectric anisotropy, viscosity, nematic phase upper-limit temperature, nematic phase stability at low temperature, and [gamma] 1, and image retention characteristics in the liquid crystal display element.

The invention discloses a liquid crystal display device, wherein, a common electrode (11) is formed in a base plate (1a) and a display electrode (12) is formed in a base plate (1b). A slit (14) is formed in the common electrode (11) at one side of the base plate (1a). The center (B) of the slit (14) is displaced from the center (B) of the display electrode facing the base plate (1b). In other words, the slit (14) canpared to the display electrode (14) looks asymmetry in the plane, so that the large perspective of the liquid crystal display device is realized, and the cost can be kept down. The invention is suitable for moving and has excellent high speed response.

The present invention addresses the problem of providing a liquid crystal display element that uses a liquid crystal composition whereby there is no worsening of ghosting characteristics in a display element and characteristics of a liquid crystal display element such as dielectric anisotropy, viscosity, nematic phase upper-limit temperature, nematic phase stability at low temperature, and <gamma>1. Through use of a liquid crystal composition containing a compound represented by general formula (A) and a compound represented by general formula (M), the present invention provides a liquid crystal composition having excellent low-temperature stability while high-speed responsiveness of the liquid crystal composition is maintained, and a liquid crystal display element that includes the liquid crystal composition.

The present invention pertains to a liquid crystal composition used in a liquid crystal display element. The present invention addresses the problem of providing a liquid crystal composition that is characterized in: that various properties of a liquid crystal display element such as a dielectric anisotropy, a bulk viscosity, a nematic-phase upper limit temperature, a rotation viscosity γ1, and a voltage holding ratio, as well as the burn-in property of a display element are not impaired; that it is less likely that dropping marks occur at the time of manufacture; that a stable eject amount of a liquid crystal material in an ODF step is achieved; and the suitability to a liquid crystal display element having an excellent solubility at a low temperature. Besides, the present invention addresses the problem of providing a liquid crystal display element in which the liquid crystal composition is used. The present invention pertains to a liquid crystal composition that contains a compound expressed by an expression (I), one or more kinds of compounds expressed by a general expression (II-1), and one or more kinds of compounds expressed by a general expression (II-2), and that has a negative dielectric anisotropy. The present invention also pertains to a liquid crystal display element in which the liquid crystal composition is used.

The invention relates to an avalanche photodiode and a method for manufacturing the same. The avalanche photodiode can improve high-speed response and reduce the features changing along time. The avalanche photodiode includes a N-type Inp substrate; an allnAs avalanche multiplying layer (3), a p-type electric field controlling layer (4), a non-doping light-absorbing layer (5), and a window layer (6) sequentially laminated on the substrate. A p-type region is present in parts of the window layer (6) and the non-doping light-absorbing layer (5). Carbon is the dopant of the electric field controlling layer (4). Zn is the dopant of the p-type region. A bottom face of the p-type region is closer to the substrate than is an interface between the non-doping light-absorbing layer (5) and the window layer (6).

The invention relates to a liquid crystal composition, a liquid crystal display element and a liquid crystal display .The liquid crystal composition with the dielectric constant anisotropism being negative is characterized by containing one or two or more compounds selected from a compound group shown in the formula (I) and one or two or more compounds selected from a compound group shown in the formula (II), wherein in the formulas, R11 represents alkyl with the carbon number of 1-3, R22 represents alkyl or a hydrogen atom with the carbon number of 1-3, and R1 and R2 independently represent alkyl with the carbon number of 1-8, alkenyl with the carbon number of 2-8, alkoxy with the carbon number of 1-8 or alkene oxygroup with the carbon number of 2-8.

There is provided a liquid crystal composition suitable for use in a liquid crystal display element that suffers less from drop marks that occur during production without degrading ghosting properties of the display element and various properties of the liquid crystal display element, such as dielectric anisotropy, viscosity, nematic phase upper limit temperature, low-temperature nematic phase stability, and γ1, and with which a stable amount of a liquid crystal material can be discharged in an ODF process. A liquid crystal display element that uses the liquid crystal composition is also provided. The present invention relates to a liquid crystal composition having negative dielectric anisotropy and containing a compound represented by formula (I), one or more compounds represented by general formula (II-1), and one or more compounds represented by general formula (II-2). The present invention also relates to a liquid crystal display element that uses the liquid crystal composition.

The present invention provides a liquid crystal display element which has high transmittance and excellent high-speed response in vertically aligned liquid crystal displays, such as PVA or MVA, and parallel aligned liquid crystal displays, such as IPS, FFS, or TN mode displays, by suppressing an increase in driving voltage, suppressing a decrease in birefringence, improving transmittance, and improving fall time in a liquid crystal. The present invention also provides a method for manufacturing said liquid crystal display element. Provided is a liquid crystal display element, wherein a liquidcrystal composition sandwiched between two transparent substrates-at least one of which has an electrode-contains a polymer or a copolymer, the content of the polymer or the copolymer is at least 0.5mass% and less than 40 mass% of the combined mass of the liquid crystal composition and the polymer or copolymer, the polymer or the copolymer forms a polymer network, and the polymer network has uniaxial refractive index anisotropy or an easy-alignment axis, and two or more different alignment states.

The present invention relates to a nematic liquid crystal composition useful as a liquid crystal display material, in which the dielectric anisotropy (Δε) thereof has a negative value, and to a liquid crystal display element that uses the liquid crystal composition. This liquid crystal composition has a liquid crystal phase in a wide temperature range, low viscosity, satisfactory solubility at low temperature, and high resistivity or voltage retention rate, and is stable against heat or light. Therefore, through use of this liquid crystal composition a VA-type or PSVA-type liquid crystal display element can be provided at high yield that has excellent display quality and that is not prone to display defects such as image retention or drop marks. A liquid crystal display element that uses this liquid crystal composition achieves both fast response and low incidence of display defects, and is useful particularly as an active-matrix-driven liquid crystal display element, and can be applied as a liquid crystal display element such as a VA-mode or PSVA-mode liquid crystal display element.

Provided are an actuator that is small, superior in terms of high-speed response, and capable of large displacement, and a manufacturing method that can easily manufacture the actuator. The actuator is configured by a laminated body including multiple electrodes(1), multiple cation-exchange resin films(12), and multiple anion-exchange resin films(13). The cation-exchange resin films (12) and the anion-exchange resin films (13) are stacked alternately, and each of the cation-exchange resin films (12) and the anion-exchange resin films (13)is sandwiched between two of the electrodes (11). A voltage is applied such that the electrodes between adjacent ones of the cation-exchange resin films (12) and anion-exchange resin films (13) have the same polarity.

The invention aims to provide a liquid crystal composition and a liquid crystal display element using the same.The liquid crystal composition is suitable for liquid crystal display elements without lowering dielectric constant anisotropism, viscosity, nematic phase upper limite temperature, nematic phase stability at low temperature and gamma 1 serving as various characteristics of the liquid crystal display elements and screen burning characteristics of display elements, being difficult to generate drip marks during manufacturing and realizing stable liquid crystal material ejection during an ODF process.The invention provides the liquid crystal composition contains one or more than two compounds shown as an above general formula (I), contains one or more than two compounds shown as an above general formula (II) and has negative dielectric constant anisotropism.The invention further provides the liquid crystal display element using the liquid crystal composition.

The invention relates to a front monitor apparatus, an optical pickup device with the front monitor apparatus, and an information record reproducing device. The invention provides a front monitor apparatus (6) which monitors a laser beam emitted from a semiconductor laser element (2) provided in the optical pickup apparatus (1), the apparatus includes first and second photodiodes (PD1, PD2) each having different light receiving sensitivity, for receiving the laser beam and outputting a current corresponding to a light receiving intensity; and a current-voltage conversion circuit (11) for differentiating voltage conversion levels for converting a current to a voltage, in association with the respective light receiving elements so that a voltage to be converted when a predetermined current is supplied from a second photodiode (PD2) having low light receiving sensitivity exceeds a voltage to be converted when the predetermined current is supplied from a first photodiode (PD1) having high light receiving sensitivity, and outputting a voltage which is obtained by conversion of a current from the respective light receiving elements.

The invention provides a liquid crystal composition and a liquid crystal display element using the same. The liquid crystal composition is applicable to the liquid crystal display element which will not make dielectric constant anisotropism, viscosity, nematic phase maximum temperature, low-temperature nematic phase stability, gamma 1 and the like as various characteristics of the liquid crystal display element and the burn-in characteristics of the display element become poor, cannot generate drain marks during manufacturing and achieves the stable liquid crystal material discharge quantity in the ODF working procedure. The invention provides the liquid crystal composition containing one or two or more compounds shown in a general formula (I) and one or two or more compounds shown in a general formula (II) and adopting dielectric constant anisotropism as negative, and meanwhile provides the liquid crystal display element using the liquid crystal composition containing one or two or more compounds shown in the general formula (I) and one or two or more compounds shown in the general formula (II) and adopting dielectric constant anisotropism as negative.

The present invention relates to a liquid crystal composition for use in a liquid crystal display element. The present invention addresses the problem of providing: a liquid crystal composition which does not undergo the deterioration in various properties required for use in liquid crystal display elements, such as dielectric anisotropy, a bulk viscosity, a nematic phase upper-limit temperature, a rotational viscosity (γ1) and a voltage holding ratio or the deterioration in image sticking resistance of the display element, rarely undergoes the formation of dripping marks during the production thereof, enables a liquid crystal material to be ejected in a stable amount in an ODF step, has good solubility at lower temperatures, and is therefore suitable for use in liquid crystal display elements; and a liquid crystal display element manufactured using the liquid crystal composition. The present invention relates to: a liquid crystal composition which comprises compounds respectively represented by formula (i) and formula (ii-b) and has negative dielectric anisotropy; and a liquid crystal display element manufactured using the liquid crystal composition.

A new type of high-speed on-off valve is composed of a valve body, a valve seat, a valve stem and a sealing ring. In order to solve the contradiction between large flow and high response, a multi-flow surface valve core structure is adopted to achieve large flow under small stroke and low pressure difference. A small hole is used to communicate with the annular groove for drainage; the spool structure is based on the spool structure of the cone valve. The traditional cone valve structure has only one oil outlet flow surface. It is difficult to achieve a large flow rate in order to ensure the response speed under a certain spool diameter. ;When the valve port is closed, the imported hydraulic oil acts on the matching taper surface of the valve core and the valve seat, and at the same time, the imported pressure oil is led to the force balance plate on the left side of the valve core through the oil passage on the valve body, and the force balance plate on the left side The area is equal to the sum of the areas of the taper surfaces where the spool and seat fit together. At this time, the hydraulic pressure at both ends of the spool is balanced and is only affected by the return spring force.

The invention discloses a high voltage-resistant permanent magnet-shield high speed switching electromagnet. The high voltage-resistant permanent magnet-shield high speed switching electromagnet comprises a push rod (6) and a shell (1), an armature (8), a guide sleeve (4) and the like which are all magnetic conductors, wherein the outer surface of the guide sleeve (4) is provided with an annular trapezoidal groove (41); the bottom (412) in the centre of the annular trapezoidal groove (41) is provided with an annular permanent magnet (9); an inner cavity (40) of the guide sleeve (4) is provided with the armature (8) which is connected with the guide sleeve (4) in a sliding way; the push rod (6) is fixedly connected with the armature (8) after penetrating through the bottom (10) of the shell (1) and a trapezoidal guide sleeve channel (42); a returning spring (5) is arranged in the trapezoidal guide sleeve channel (42); and one end of the returning spring (5) is pressed against the shell(1) while the other end is pressed against the armature (8). The high voltage-resistant permanent magnet-shield high speed switching electromagnet has the characteristics of capacity of increasing output electromagnetic force and increasing response speed.

TOne of the purposes of the present invention is to provide a liquid crystal composition which has a positive [Delta][epsilon] value, also has a liquid crystal phase over a broad temperature range, good solubility at lower temperatures, excellent ODF process compatibility, high specific resistance and a high voltage holding ratio, and is stable to heat and light. In order to achieve the purpose, a liquid crystal composition is provided, which comprises a compound represented by formula (i) and a compound represented by formula (ii).

In a housed state, a magnetic fluid 4 is positioned in a groove 11 and spaced from the outer circumference of a lens barrel 10, so that a fluorochemical surface modification film of the outer circumference of the lens barrel 10 can be prevented from deteriorating at a position to confront the magnetic fluid 4 in the housed state. Therefore, the deterioration of the fluorochemical surface modification film of the outer circumference of the lens barrel 10 does not proceed earlier at a local region, so that the premature wetting of the outer circumference of the lens barrel 10 with the magnetic fluid 4 can be prevented to elongate the lifetime of a light shielding device 1.

The invention provides a liquid crystal display element composition, a liquid crystal alignment layer, a liquid crystal display element and a manufacturing method thereof. The invention obtain a liquid crystal display element with high response and excellent voltage maintaining characteristics. In the liquid crystal display element composition on at least one layer out of a liquid layer forming liquid crystal display elements and a liquid crystal alignment layer, a structural composition (A) capable of realizing chain transfer is included.