771 results about "Light driven" patented technology

Light reactive deposition uses an intense light beam to form particles that are directly coated onto a substrate surface. In preferred embodiments, a coating apparatus comprising a noncircular reactant inlet, optical elements forming a light path, a first substrate, and a motor connected to the apparatus. The reactant inlet defines a reactant stream path. The light path intersects the reactant stream path at a reaction zone with a product stream path continuing from the reaction zone. The substrate intersects the product stream path. Also, operation of the motor moves the first substrate relative to the product stream. Various broad methods are described for using light driven chemical reactions to produce efficiently highly uniform coatings.

The invention provides a communication system (500), a lighting system, a method of transmitting information and a computer program product. The communication system according to the invention is configured for transmitting data via visible light. The communication system comprises a signal generator (530) for generating a light driving signal (200) being a frequency shift key modulated signal comprising a sequence of signal parts (215, 225), each signal part being modulated at a first or second frequency in accordance with the data, the signal parts modulated at the first frequency having first pulses in first periods (T0) and the signal parts modulated at the second frequency having second pulses in second periods (T1). Energy of the visible light corresponding to a pulse in a respective period has center of gravity in time. The pulses in the periods are positioned so that the center of gravity is at the center of the period for reducing human-perceivable frequency components in the visible light driving signal.

A novel lighting system utilizing low power consumption LEDs to provide safe, economical and decorative lighting. In a first embodiment, and acrylic candle body having a 45 degree reflector is mounted on top of a LED source to direct light along the body of the light and outwardly as directed by the reflector. The acrylic body can be rotated to point the reflected light in the desired direction. In a second embodiment, the acrylic candle and reflector are replaced by fiber optic ports and a light driver for connecting fiber optic strands that can be side lighting or end lighting to provide lighting at points distant from the light source. In a third embodiment, the fiber optic strand in run in parallel inside or outside a transparent liquid conduit such as a modified garden hose, a beverage dispenser, or a kitchen faucet to light the conduit and or the spray of the hose in a single or multiple colors.

An illuminator (1) has an array of cavities (3) are drilled in a substrate having an FR4 electrically insulating body (7) plated with copper conductors (6(a), 6(b)). Further patterning of the substrate provided electrical conductors (3(b)) in the cavities to act as both part of the light drive circuit and reflectors in the cavities. The drilling is performed to the full depth of the FR4 body (7) until underneath plating (6(b)) is reached. A further Cu plating (4(b)) is applied on the platings (6(b)) so that they together form a heat spreader under each cavity (3). A layer (8) of resin incorporating thermally conductive particles is bonded to the underside surfaces, both of the FR4 (7) and of the platings (4(b)). A heat sink (9) is bonded to the layer (8). Good optical efficiency and thermal dissipation is achieved, despite the fact that conventional PCT processing techniques are used.

The invention discloses a Cu2O-TiO2/g-C3N4 ternary complex and a preparation and application method thereof. The preparation method comprises the steps that firstly, urea and TiO2 are mixed through a simple physical method, water is added to the mixture, the mixture is dried by distillation, calcination is conducted, and then a binary complex of TiO2/g-C3N4 is obtained; secondly, by means of sediment and reduction processes, the Cu2O-TiO2/g-C3N4 ternary complex is prepared. The preparation method is simple, cost is low, and industrial production is facilitated. The prepared ternary complex serves as a visible-light-driven photocatalyst which has high catalytic activity in the visible region, the catalytic efficiency is high, and various organic pollutants in a solution can be degraded instantly; the prepared ternary complex can also serve as a visible-light-driven photocatalyst which is applied to hydrogen preparing of photocatalytic water splitting, degrading of volatile organic pollutants in air and the like, and very good application prospects are achieved.

An automatic two-gear transformer for a pure electric automobile comprises an input shaft, a first middle shaft, a second middle shaft, a third middle shaft, a first cylindrical gear pair, a second cylindrical gear pair, a third cylindrical gear pair, a first torque transmission device, a second torque transmission device and a differential assembly; rotation center lines of the input shaft, the third middle shaft and the differential assembly are mutually parallel. According to the automatic two-gear transformer for the pure electric automobile, automatic two-gear speed change is adopted, the transmission ratio range is expanded, the performance requirement on a drive motor can be reduced greatly, an efficient and light drive motor is allowed to be used, and the total size, the total mass and the total cost of an electric drive system of the pure electric automobile are further reduced.

A backlight unit includes a power converter which generates a light driving voltage in response to a voltage control signal with a first level, a plurality of light emitting strings, wherein each of the light emitting strings receives the light driving voltage through a first end thereof, and a controller which generates the voltage control signal. The controller is connected to a second end of at least one of the light emitting strings and detects a level of a signal at the connected second end to detect an operation state of the light emitting strings. The controller generates the voltage control signal with a second level to stop the power converter from generating the light driving voltage when the operation state of the light emitting strings is in an abnormal state.

The invention discloses a lighting driving circuit and a lighting system. A constant current control circuit of the invention is provided with an instantaneous value current-limiting function; the output current under a certain range of input voltage achieves the constant current effect in the absence of a silicon controlled light dimmer; with the help of the silicon controlled light dimmer, when a conduction angle is greater than a certain value, the instantaneous value of the output current does not achieve the current-limiting value, the circuit is worked at an constant current output state; when the conduction angle is less than a certain value, the instantaneous value of the output current achieves the current-limiting value, the output current is limited, the average value of the output current is reduced, thereby realizing the light-dimming. Therefore, the scheme can be compatible with two conditions of the existence of inexistence of the silicon controlled light dimmer, the compatibility is high; through the adding of a leakage circuit, the error shutoff of the controlled silicon caused by the condition that the output current is lower than the maintenance current can be prevented, thereby guaranteeing the stabilization of the output current of the system and preventing the system from flickering.

A liquid crystal elastomer actuator to move in a fluid is described herein. The actuator includes a body with dimensions between 100 nm and 800 μm having a low Reynolds number. The body includes a first and a second spatially separated volume, each comprising a liquid crystal elastomer. The first volume is doped with a first photoactive doping substance to absorb electromagnetic radiation at a first wavelength and the second volume is doped with a second photoactive doping substance to absorb electromagnetic radiation at a second wavelength. The first and second volumes change shape as a consequence of light absorption at the first or second wavelength, defining a first and a second joint. A first absorbance of the first volume at a given wavelength is different than a second absorbance of the second volume at a given wavelength, the first and second absorbance are measured in the same time interval.

The invention relates to a visible-light-driven photocatalyst self-cleaning antibacterial fabric, and preparation and application thereof. A composite catalysis particle membrane composed of TiO2, C3N4 and Cu2O is formed on the surface of a fabric. The visible-light-driven photocatalyst self-cleaning antibacterial fabric is prepared through the following steps: under the condition of room temperature, mixing TiO2, a nitrogen-containing compound and distilled water and then successively subjecting the obtained mixture to ultrasonic concussion, drying, grinding and calcining so as to obtain a substance A; adding the substance A into a coating agent, carrying out uniform dispersion, then directly coating the surface of the fabric with the coating agent and carrying out drying; and dipping the fabric in mixed liquor at room temperature, adjusting a pH value, carrying out dipping again, adding a glucose solution at 70 to 90 DEG C, carrying out treatment for 30 to 60 min, taking the fabric out and carrying out air drying at room temperature. According to the invention, through compounding and mixing of catalysts with photocatalysis performance at different wavelengths, a visible-light-driven photocatalyst with a wide catalysis wavelength scope and high catalysis efficiency is prepared.

The invention relates to a vehicle body controller and a control method thereof. The vehicle body controller integrates a windscreen wiper intermittent controller, a remote-control door lock controller and a turn light controller which are originally independently controlled into a whole for uniform control by adopting an integral control mode so as to not only save the installation structure of the controller, but also decrease chips of an internal control circuit. The vehicle body controller realizes windscreen wiper intermittent control, remote-control door lock and central-control door lock control and turn light control and increases the functions of collision unlocking, traveling vehicle automatic locking, claxon anti-theft alarm, and the like on the basis. The vehicle body controller internally comprises a main controller module, a power supply processing circuit, a signal processing circuit, a central-control lock driving module, a turn light driving module, a windscreen wiper intermittent driving module and a claxon driving module. The control method can overcome the defect of high fault rate of an independent control unit and also reduces the integral vehicle cost.

Methods and systems for a differential compressed sensor to form a smart optical imager that uses both active (laser) and passive (ambient light) to sample the direct image information within a three-dimensional spatial frame. The lens-based distance sensor is produces smart sampling of target by adjusting the size of the laser beam spot on the target sampling grid to produce a boundary outline by a light flooding. This target dependent direct sampling of the target results in direct compressed sensing. A passive light acquisition pin-hole sampling optical sensor design is proposed that produces the pixel-basis Laplacian to determine the compressed sensed pixels in the incident image.

Light reactive deposition uses an intense light beam to form particles that are directly coated onto a substrate surface. In some embodiments, a coating apparatus comprising a noncircular reactant inlet, optical elements forming a light path, a first substrate, and a motor connected to the apparatus. The reactant inlet defines a reactant stream path. The light path intersects the reactant stream path at a reaction zone with a product stream path continuing from the reaction zone. The substrate intersects the product stream path. Also, operation of the motor moves the first substrate relative to the product stream. Various broad methods are described for using light driven chemical reactions to produce efficiently highly uniform coatings.

The invention discloses a dried persimmon-shaped visible-light-driven photocatalyst BiOBr and a preparation method thereof. The inventor adopts a low-temperature solvothermal method, controls the morphology of a halogen-bismuth-oxide visible-light-driven photocatalyst by controlling the dosage of a bismuth source and a bromine source and adding a structure guiding agent, and successfully prepares the novel efficient visible-light-driven photocatalyst BiOBr with novel and special morphology, the dried persimmon shape, for the first time. The preparation method disclosed by the invention is simple in overall production technology, easy to operate, low in synthesis temperature, high in reaction yield (89%), friendly to environment and low in cost, and accords with the requirements of practical production, and the raw materials are readily available. The visible-light-driven photocatalyst disclosed by the invention has good visible-light catalytic activity, can completely degrade a plurality of organic pollutants (such as methylthionine chloride and methyl orange) within a short period of time under irradiation of visible light, is small in light corrosivity, good in reusability and large in market potential, can be applied to industrial production, and especially has good application value in photocatalytic decomposition of organic pollutants by solar energy.

The invention discloses a light-driven composite with a double-layer-film structure and a preparation method of the light-driven composite. A composite thin film with the light-driven characteristic is obtained by coating the surface of a rubbed base plate with a light responsiveness material after surface grinding with an industrially-produced polymeric film with a base plate material. The reversible photodeformation phenomenon can happen to the composite thin film under illumination of a certain wavelength, luminous energy is directly converted into mechanical energy, and then light-driven devices can be obtained through simple design. The light-driven composite is easy and rapid to prepare, raw materials of the base plate are easy to obtain, large-area preparation can be conducted, the application range is wide, and the light-driven composite has potential application prospects in the fields of artificial muscle, microfluid control, new energy, energy conversion, devices and the like.

The invention belongs to the filed of photoresponse high polymer materials and particularly relates to a photoinduced-deformation high polymer material based on a triplet state-triplet state annihilation up-conversion luminescence mechanism. The material is composed of liquid crystal polymers containing azo phenyl groups and up-conversion luminescent materials based on triplet state-triplet state annihilation. The liquid crystal polymers containing the azo phenyl groups do not have the stimulation responsiveness on long-wavelength visible light or near-infrared light. The up-conversion luminescent materials of triplet state-triplet state annihilation are introduced in the material system preparing process, short-wave visible light enabling the azo phenyl groups to have the stimulation response is generated in the up-conversion process, and therefore a whole material system can deform under irradiation of the long-wavelength visible light or the near-infrared light. The long-wavelength visible light or the near-infrared light drives the material system so as to promote application of the photoinduced-deformation high polymer material in field of biochips, aspects of micro executing devices and the like.

The invention discloses a preparation method for a copper/cuprous oxide/cyclized polyacrylonitrile visible-light-driven photocatalyst, and belongs to the technical field of environmental cleaning photocatalyst new materials. The preparation method includes the steps of firstly, preparing a nanometer copper hydroxide/photocatalyst compound by synchronously conducting solvent conversion and in-situ ion exchange reaction with photocatalyst, cupric nitrate and sodium hydroxide as raw materials; secondly, reducing copper hydroxide into cuprous oxide in situ through ascorbic acid; thirdly, conducting thermal treatment under the nitrogen atmosphere, reducing a small amount of cuprous oxide into elementary substance copper while cyclization and dehydrogenation are conducted on polyacrylonitrile to form a conjugated structure, and obtaining the copper/cuprous oxide/cyclized polyacrylonitrile visible-light-driven photocatalyst. The raw materials are wide in source, cost is low, the preparation method is simple and suitable for large-scale production, cyclized polyacrylonitrile can improve the separation efficiency of photoproduction electron holes and absorption of the visible light areas and can have a protection and optical corrosion reduction effect on copper/cuprous oxide, and the obtained catalyst is remarkable in adsorption and photocatalytic effect.

The invention provides a visible light communication method and device fusing OOK modulation with OFDM modulation. The method comprises the steps of: receiving an external OOK signal to be fused and an OFDM signal to be fused; carrying out time synchronization on the OOK signal and the OFDM signal; carrying out signal superposition on the OOK signal and the OFDM signal after the time synchronization so as to obtain a superposed signal, wherein the signal superposition modes includes: when the OOK signal is 1, a positive signal of the corresponding OFDM signal is set to zero, a negative signal is unchanged, an obtained nonpositive OFDM signal is loaded to the OOK signal which is 1, and when the OOK signal is 0, the negative signal of the corresponding OFDM signal is set to zero, the positive signal is unchanged, and an obtained nonnegative OFDM signal is loaded to the OOK signal which is 0; and modulating the superposed signal to a visible light driving current so as to obtain a visible light communication signal, and sending the visible light communication signal. According to the invention, the OOK modulation is fused with the OFDM modulation, demodulation of different types of receivers is supported, and the transmission rate and the channel resource utilization rate are simultaneously improved.