61results about How to "Improve polarization efficiency" patented technology

A side emitting device, a backlight unit using the same as a light source, and a liquid crystal display (LCD) employing the backlight unit. The side emitting device includes a light-emitting device to emit light, and a side emitter to change the path of at least part of the light emitted from the light-emitting device. The side emitter includes a first reflecting surface reflecting light emitted from the light-emitting device in a first range of angles close to a central axis, a first refracting surface refracting the light reflected by the first reflecting surface obliquely downward from the horizontal axis, and a second refracting surface refracting light emitted from the light-emitting device in a second range of angles complementary to the first range of angles. The backlight unit includes at least an array of side emitting devices, a reflection diffusion plate and a first transmission diffusion plate.

A linear side emitter, a backlight system and a liquid crystal display using the same are provided. The linear side emitter includes a plurality of LED chips, a bottom portion, a reflecting surface, and side surfaces. The LED chips arranged in a line on the bottom portion. The reflecting surface is disposed above the bottom portion and reflects light exiting the LED chips. The side surfaces are formed at both sides of the LED chip array line and transmit light is reflected by the reflecting surface and light reflected by the reflecting surface and then reflected by the bottom portion. The side surfaces each have at least one bend formed therein.

A backlight unit and a liquid crystal display (LCD) apparatus employing the backlight unit. The backlight unit includes a plurality of light-emitting device units disposed on a base plate in an array, each light-emitting device unit including a collimator to collimate light emitted by a light-emitting device so that the light propagates in a principal propagation direction of light emitted from light-emitting device, a plurality of side reflectors disposed in an array above the array of corresponding light-emitting device units and to reflect lateral light incident from the corresponding light-emitting device units, a reflective diffusion plate to reflect and diffuse light incident from the side reflectors, and a transmissive diffusion plate that is disposed above the light-emitting device units, to transmit and diffuse the incident and reflected light.

A side light-emitting device, a backlight unit using the side light-emitting device as a light source, and a liquid crystal display (LCD) apparatus employing the backlight unit. The side light-emitting device includes a light-emitting device to generate light and a side emitter disposed adjacent to the light-emitting device to emit the light incident from the light-emitting device in a lateral direction. The side emitter includes a reflecting surface to reflect incident light, and a reflecting / refracting surface to totally internally reflect light incident directly from the light-emitting device to the reflecting surface and to refract the light incident from the reflecting surface so that the refracted light propagates in the lateral direction. Since the side light-emitting device emits most the light in the lateral direction, using the side light-emitting device as a light source in a backlight unit allows light to be mixed evenly.

A backlight unit and an LCD apparatus employing the same. The backlight unit includes: a base plate, a plurality of light emitting units arranged on the base plate to form at least one line, an optical plate disposed above the plurality of light emitting units, and a light transmission diffusion plate disposed on the optical plate to diffuse and transmit incident light. The optical plate includes: a plurality of reflection mirrors formed at a lower surface thereof to face the plurality of light emitting units to reflect light directly emitted upward from the plurality of light emitting device units, and a saw-tooth reflection / refraction pattern formed at an upper surface thereof to spread incident light at a wide angle.

A thermotropic optical shutter device incorporates coatable, thin-film polarizers with a thermotropic depolarizer. The coatable polarizers provide a mechanism for adjusting the polarizer properties (i.e., absorption, reflection, or diffusion) by changing the thickness of the coating. For example, a thicker film may have a higher relative polarizing efficiency while a thinner film may have a lower relative polarizing efficiency. Using the same base materials and manufacturing process, the contrast ratio and other properties of a thermotropic or thermochromic shutter device (e.g., a liquid crystal-based smart window film) may be adjusted in real time on the manufacturing line.

The invention relates to an organic second-order non-linear optical chromophore with a D-Pi-A structure and decorated by a tree-like group, and a synthesizing method and applications thereof. The chromophore of the invention introduces a thiophene ring conjugated Pi electronbridge having stronger electrical transmission capacity and containing branched chains and a tricyano pyrroline receptor having strong electron-withdrawing property; the receptor end is introduced into the tree-like decorative group, the one-order hyperpolarizability of chromophore molecules is greatly improved; the solubility and the film forming ability of the chromophore in polymer is improved, the interaction force among the molecules is reduced. The second-order non-linear optical chromophore with the following structure is doped with polymers, such as amorphous polycarbonate or polymethylmethacrylate and the like according to the mass ratio of 1:10; the electro-optical coefficient of the obtained polarized polymeric materials achieves 217pm / V; in addition, the donor and receptor of the chromophore can be introduced into a crosslinkable group, thus improving oriented stability of the chromophore in polymer, and satisfying the requirements of devices.

Disclosed is a fringe field switching liquid crystal display, which prevents disclination lines from being created at a wedge section and improves liquid crystal polarization efficiency of a pixel electrode. The fringe field switching liquid crystal display comprises upper and lower substrates arranged while forming a space between them, a conductive black matrix formed on a lower surface of the upper substrate, a common electrode formed on an upper surface of the lower substrate, a gate insulation layer formed on an upper surface of the common electrode, and a pixel electrode formed on an upper surface of the gate insulation layer. Herein, the pixel electrode forms an electric field and includes a fringe portion having a saw-tooth shape, which forms one of 1-domain and 2-domain among the pixel electrode, the conductive black matrix, and the common electrode.

A side light-emitting device including a light-emitting device to generate light and a side emitter to emit the light incident from the light-emitting device in a lateral direction. The side emitter includes a first reflecting surface to reflect the light emitted from the light-emitting device into the side emitter, a second reflecting surface that is formed at a portion of the side emitter that contacts the light-emitting device to reflect a first light that is reflected from the first reflecting surface in the lateral direction, and a refracting surface to refract a second light that is reflected from the first reflecting surface and proceeding directly toward the refracting surface and the first light that is reflected from the first reflecting surface to the second reflecting surface and is reflected again from the second reflecting surface to exit the side emitter in the lateral direction.

The invention provides a piezoelectric ceramic and piezoelectric semiconductor test piece diversity polarization experiment system. The piezoelectric ceramic and piezoelectric semiconductor test piece diversity polarization experiment system comprises a mounting rack and a polarization tank, wherein a multi-channel high voltage power supply and a motor reducing gear are arranged on the mounting rack; an opening is formed in the top of the polarization tank; a main shaft of the motor reducing gear is connected to a lifting mechanism located in the polarization tank in a transmission manner; a multi-stage clamping device is arranged on the lifting mechanism inside the polarization tank and is located below the opening; a tank cover for blocking off the opening is arranged on the multi-stage clamping device; replaceable polarization pressure heads with different structures are arranged in the multi-stage clamping device; and a thermocouple is inserted into the polarization tank. The piezoelectric ceramic and piezoelectric semiconductor test piece diversity polarization experiment system has the beneficial effects that the simultaneous polarization of multiple piezoelectric ceramics and piezoelectric semiconductor test pieces can be realized; different voltages can be applied to the piezoelectric ceramics and piezoelectric semiconductor test pieces; the experiment system ensures that the piezoelectric ceramics and piezoelectric semiconductor test pieces have relatively good polarization consistency; experimental errors caused by change of environmental conditions are greatly reduced; and the efficiency, safety and consistency of manufacturing the piezoelectric ceramics and piezoelectric semiconductor test pieces in laboratories are greatly improved.

The invention relates to a piezoelectric ceramic material with high voltage electric response and a high Curie temperature and a preparation method thereof. A stoichiometric ratio accords with a chemical general formula (1-x)(K0.48Na0.52)(Nb1-ySby)O3-xBi0.5(Na0.8K0.2)0.5ZrO3; wherein x is more than or equal to 0.02 and less than or equal to 0.04, and y is more than or equal to 0.02 and less than or equal to 0.04. The preparation method comprises the following steps of: (1), preparing a base material according to the stoichiometric ratio and a sodium niobate (NaNbO3) sheet template for texturegrowth of crystal grains; (2), weighing the base material, the template and a MnO2 sintering aid according to the stoichiometric ratio, placing the weighed base material, template and MnO2 sintering aid in a nylon tank, adding a solvent, a dispersant and a binder, and uniformly stirring the mixture to obtain casting slurry with good fluidity; (3) casting the slurry to obtain a strip-shaped thick film, cutting the thick film after the thick film is dried, laminating and hot pressing the thick film into a ceramic blank body; (4) removing the blank body from the adhesive, and sintering the blankbody by using a two-step sintering process to obtain lead-free textured piezoelectric ceramic, wherein the lead-free textured piezoelectric ceramic has high piezoelectric performance and a high Curietemperature. The environment-friendly lead-free piezoelectric ceramic material has higher practical value in the fields of low and medium temperature sensors, transducers, drivers and the like.

The invention relates to a high-dielectric-constant micro-filtration and ultra-filtration membrane. The micro-filtration and ultra-filtration membrane comprises a high-dielectric-constant modification agent and a membrane material. The weight percentage of the high-dielectric-constant modification agent and the membrane material is 1-25%. A preparation method of the high-dielectric-constant micro-filtration and ultra-filtration membrane includes the steps of preparation of the modification agent, preparation of a membrane casting solution, membrane forming and curing. According to the high-dielectric-constant micro-filtration and ultra-filtration membrane and the preparation method, the dielectric constant of the micro-filtration and ultra-filtration membrane can be well improved by adding the high-dielectric-constant modification agent; the anti-fouling performance of the micro-filtration and ultra-filtration membrane can be obviously improved by combining the modification agent with a unique DEP power source of the company; under the action of dielectric electrophoresis, pollutants will be enriched around the electric field and not be adsorbed to the surface of the micro-filtration and ultra-filtration membrane, so the flux of the micro-filtration and ultra-filtration membrane and quality of produced water are greatly improved. Raw materials of the membrane are easy to prepare, the modification method is simple, and industrial production and application are easy.

The invention discloses an organic second-order nonlinear optical chromophore modified by a flexible isolating group, It has the following structure described in the description, wherein R1 is an alkyl group of C1 to C20, a hydroxyalkyl group of C1 to C10, a hydroxyalkyl group of C1 to C10 protected by a halogen atom or a hydroxyalkyl group of C1 to C10 protected by a silane; R2 is methyl or trifluoromethyl; R3 is alkyl or phenyl of C1 to C20. The electron donor, the conjugated pi electron bridge and the electron acceptor of the invention are combined to not only well increase the intermolecular steric hindrance, but also inhibit the accumulation between chromophore molecules caused by dipole interaction, improve the intramolecular electron transport ability and effectively improve the conversion of the first-order hyperpolarizability of chromophore molecules to the macroscopic electro-optic coefficients of materials.

A projector includes: a light source; a polarization conversion element array having an entrance surface on which an effective entrance area and an ineffective entrance area are disposed to form stripes; a modulation device adapted to modulate a linearly polarized light beam emitted from the polarization conversion element array in accordance with an image signal; a projection device adapted to project the modulated light beam; a first light shielding section, a part of the entrance surface being provided with the first light shielding section adapted to shield a part of the incident light beam to the effective entrance area; and a first opening section, the first opening section being another area of the entrance surface than the part provided with the first light shielding section, at least a part of the first opening section reaches an end of the entrance surface.

The invention discloses an organic second-order nonlinear optical double chromophore prepared by Cu(I) catalyzed click reaction. The organic second-order nonlinear optical double chromophore has a structure shown as a formula (I) in description, wherein R1 is hydrogen, fluorine, chlorine, bromine, iodine, hydroxyl, alkyl or alkoxy; R2 is a alkyl chain, acyl or alkoxy; R3 is an alkyl chain or acyl;R4 is chromophores with a D-pi-A structure shown as formulas (2) to (7) as in the description, wherein X represents a connection position of double chromophore and the chromophore of the D-pi-A structure; R5 is an alkyl chain; R6 is methyl or trifluoromethyl; R7 is alkyl, phenyl, substituted phenyl, substituted thienyl or hydroxyalkyl; R8 is hydrogen, alkyl, alkoxy, alkyl sulphanyl, hydroxyalkylor hydroxyalkyl protected by silane; R9 is hydrogen, alkyl, alkoxy, alkyl sulphanyl, hydroxyalkyl or hydroxyalkyl protected by silane; R10 is alkyl, hydroxyalkyl or hydroxyalkyl protected by silane.

The invention discloses a method for monitoring the vehicle speed and load by piezoelectric arrays, which is characterized in that two columns of parallel piezoelectric arrays are embedded at intervals along the driving direction of automobiles on the road surface, the two columns of piezoelectric arrays are internally equipped with the same number of piezoelectric aggregate units, the piezoelectric aggregate units in the two columns of piezoelectric arrays are uniformly arranged at intervals and have the same spacing distance, all piezoelectric aggregate units in the piezoelectric arrays areconnected with a signal acquisition system in parallel, and the signal acquisition system is led to a processing system through a data line; the processing system obtains the driving speed of a vehicle according to time parameters; and the load of the vehicle is obtained according to the voltage generated when the vehicle runs over the piezoelectric arrays. The method is used for monitoring the pressure stress of the vehicle for the road surface and the vehicle speed. Compared with the existing piezoelectric sensor, the sensing performance is more sensitive and more stable.

The invention relates to the field of organic second order nonlinear optical materials and in particular relates to a polymethacrylate cross-linked electro-optic polymer system of which a side chain contains an organic second order linear optical chromophore with an electronic donor-acceptor structure, as well as a synthesis method and application of the polymer system. The organic second order linear optical chromophore with high electro-optic performance is introduced into a macromolecular chain of polymethacrylate, so that the compatibility between the chromophore molecules and the high polymer system is greatly improved; and meanwhile, a cross-linking reaction of the macromolecular chain is realized through a hydroxylation reaction between a cross-linking agent 2,4-toluene diisocynate and the macromolecular chain, the polarization orientation stability of the chromophore molecules in the polymer is greatly improved, and the component requirements are met. The polymethacrylate cross-linked electro-optic polymer system has the following structure described in the specification.

Nonlinear optical chromophores having one or more diamondoid groups covalently attached to the chromophore, methods of making nonlinear optical chromophores, their use in thin films and electro-optical devices containing such nonlinear optical chromophores and thin films comprising the same.

The present invention relates to a high dielectric constant nano-filtration composite film, which comprises a porous base film and a polyester amine active layer attached onto the porous base film, wherein the porous base film contains a high dielectric constant modifier and a film material, a weight ratio of the high dielectric constant modifier to the film material is 1-25%, and the polyester amine active layer comprises a polyamine monomer. The preparation method of the high dielectric constant nano-filtration composite film comprises: 1) modifier preparation; 2) film casting liquid preparation; 3) film formation; 4) curing; and 5) nano-filtration composite film forming. According to the present invention, by adding the high dielectric constant modifier, the dielectric constant of the nano-filtration composite film can be well improved; by combining the high dielectric constant nano-filtration composite film and the unique DEP power supply of our company, the pollution resistance of the nano-filtration composite film can be significantly improved; and under the action of dielectric electrophoresis, the pollutants can be enriched around the electric field and cannot be adsorbed onto the surface of the nano-filtration composite film, such that the flux of the nano-filtration composite film, the quality of the produced water and the like can be substantially improved.

The invention discloses a device for continuously producing piezoelectric fibers. The device comprises a melt spinning device, a water cooling roller, a temperature control roller and a polarization device, wherein the melt spinning device, the water cooling roller, the temperature control roller and the polarization device are connected in sequence; the melt spinning device comprises a spinning box body, a hopper is connected to the upper surface of the spinning box body, a spinning nozzle is connected to the end of the spinning box body, and the polarization device comprises a polarization pool loaded with silicone oil; two high-voltage electrode plates are arranged in the silicone oil, a fiber advancing channel is formed between the two high-voltage electrode plates, a low-speed rollerand a high-speed roller are arranged at the two edges of the fiber advancing channel respectively, and a heating device is arranged at the bottom of the polarization pool. The device integrates production polarization and collection, and the efficiency of producing the piezoelectric fibers is improved. A method for continuously producing the piezoelectric fibers adopts the device, the silicone oilis heated, the rotation speed ratio of the high-speed roller to the low-speed roller is adjusted, and the voltage of the high-voltage electrode plates is adjusted. The method is easy to operate, various parameters are precisely controlled, and the yield is high.

The invention provides a storage unit and a memory with the same. The storage unit comprises a first MTJ and a second MTJ; the first MTJ comprises a polarization layer; any cross section in a height direction of the first MTJ has a first surface area; the second MTJ comprises a reference layer; the first MTJ and the second MTJ share a free layer; any cross section in a height direction of the second MTJ has a second surface area; and the first surface area is greater than the second surface area. When a certain amount of current passes through the second MTJ, a magnetization direction of the free layer is turned over through a magnetic rotation transfer moment effect; when the magnetization directions of the reference layer and the free layer are parallel or anti-parallel, the resistance of the second MTJ is in a low or high-resistance state; and the polarization layer and the free layer are isolated through a first nonmagnetic layer, and the magnetization directions of the polarization layer and the free layer are perpendicular. Due to the adoption of a novel device structure, a writing current of the magnetic rotation memory can be effectively reduced, the writing speed of the magnetic rotation memory can be increased, and the like.

The invention relates to a nuclear magnetic resonance gyroscope with discrete working media, which adopts a form that three air chambers are closely connected in parallel, so that two processes of atomic polarization precession and atomic precession magnetic moment detection are independent, and high-precision precession magnetic moment detection in a specific direction is easy to achieve withoutbeing interfered by a driving magnetic field. The depolarization effect of detection linearly polarized light on atoms does not need to be considered, and the gas component filling of each atom gas chamber only needs to consider the single effect of the gas chamber, so that the gas component is easy to optimize; the types of filling gases are few, and the requirements on the atomic gas chamber filling process are reduced.

The invention discloses a nuclear magnetic resonance water detector transmitter based on dynamic compensation. The nuclear magnetic resonance water detector transmitter comprises a control module, a transmitter charging module, and a transmitter pulse transmitting module. The control module comprises a single-chip microcomputer module and a PC, which are connected with each other. The transmitter charging module comprises a lithium battery pack, a first relay, a boosting circuit, a constant current source, a power supply large capacitor, and a detection circuit. The transmitter pulse transmitting module comprises a second relay, a switching device control module, a Larmor frequency generator, an H bridge inverter module, a matching and tuning capacitor, and a transmission coil. The nuclear magnetic resonance water detector transmitter based on the dynamic compensation is advantageous in that during the discharging process of the capacitor, the capacitor voltage compensation is carried out, and the before the capacitor voltage decreases to a certain extent, the transmission time of the transmitter is prolonged by compensating the capacitor voltage, and the greatest pulse moment of the transmission pulses is 60000 A / ms, excitation times of polarization of an aquifer at an equal level are reduced, and the working efficiency of the transmitter is greatly improved.