1811 results about "Photoresistor" patented technology

The camera light-compensating lamp has two working modes, namely opening mode and closing mode. It comprises: when the light-compensating lamp is at closed mode, if the parameter value of automatic exposure is more than or equals a preset opening threshold, the light-compensating lamp is opened; if is small than a closing threshold, the light-compensating lamp is closed. The invention uses a exposure parameter to estimate the ambient brightness in order to open or close the light-compensating lamp.

An optoelectronic device, such as a solar cell, light-emitting device, or photodetector, comprises a substrate, a number of fibers supported by the substrate so that an end of each fiber is in electrical communication with the substrate surface; an optional first layer, covering the substrate, though which the fibers protrude, and a second layer overlaid on at least part of the first layer and exposed fiber surfaces. The second layer may be electrically conducting, and electrically isolated from the substrate surface by the first layer. The second layer can be in electrical communication with each fiber, and an electrically conducting path can exists between the second layer and the substrate surface through each fiber. The substrate, in whole or in part (such as the substrate surface) can be electrically conducting. The electrically conducting path may comprises a semiconductor p-n junction, so that the optoelectronic device emits light, provides a photovoltaic potential, and / or is sensitive to light, for example acting as a photoresistor, photodetector, and the like.

The invention provides a mobile phone which can prevent false triggering of a touch screen. The mobile phone comprises an infrared photosensitive element, a first light guide structure, a detecting unit and a control unit, wherein an opening of the first light guide structure is positioned near the touch screen and used for guiding the light to the infrared photosensitive element; the detecting unit is used for detecting the electrical parameter change of the infrared photosensitive element; and the control unit is used for locking or unlocking the touch screen according to the measured electrical parameter change of the infrared photosensitive element. The invention also provides a method for preventing the false triggering of the touch screen, which comprises the following steps of: detecting the electrical parameter change of the infrared photosensitive element; and locking or unlocking the touch screen according to the electrical parameter change of the infrared photosensitive element. The invention constructs an optical sensing circuit by discrete component photosensitive resistance so as to recognize whether the touch control of the screen is a false action or not; and the design cost of the system can be greatly reduced when the misoperation is solved.

The invention relates to a visual angle control element and a manufacturing method thereof, and a liquid crystal display device. The visual angle control element comprises a first transparent substrate, a first transparent electrode layer, a patterned transparent photoresistor layer, a second transparent electrode layer and a second transparent substrate which are sequentially laminated from bottom to top, wherein the patterned transparent photoresistor layer comprises a plurality of rectangular transparent photoresistors which are arranged in a matrix mode; the rectangular transparent photoresistors are separated by strip gaps which are distributed longitudinally and transversely; and the strip gaps are filled with polymer dispersed liquid crystals. When in the narrow visual angle mode, the first transparent electrode layer and the second transparent electrode layer are not powered up, and the polymer dispersed liquid crystals are in the scattering state; and when in the wide visual angle mode, the first transparent electrode layer and the second transparent electrode layer are powered up, and the polymer dispersed liquid crystals are in the transparent state. The visual angle control element is simple in technique, has favorable effects, and can switch the visual angle freely. The visual angle control element does not need additional backlight or pixel design.

Systems and methods of creating talking books that employ photo-electronics to realize autonomous page recognition, are provided. More particularly, systems and methods are provided for employing one or more light sensing components (e.g., photoresistors, phototransistors, and photodiodes) on the pages of a book in order to recognize when a user is reading a particular page, or a pair of pages such that an audio segment associated to that page, or pair of pages, may be played. This invention also provides light sensing components that can recognize, and react to, user interactions with a talking book. Examples included playing a media segment or turning a particular LED ON for a particular action (e.g., covering an interacting light sensing component).

The invention provides a method for automatically switching day and night modes. The method is applied to a camera and comprises the following steps of A, calculating the brightness of a picture according to a current photographed image; B, performing day and night mode switching according to the calculated brightness of the picture. According to the method provided by the technical scheme, the problems of cost, illumination and instruments which are caused by the adoption of a photoresistor in the prior art are solved.

The circuit utilized for measuring resistances by using pulse modulation technique comprises the capacitance C1, the charging circuit, the discharging circuit, the comparator, the controller and the pulse-processing module etc. and the output of the comparator controls On / Off of the charging circuit and the discharging circuit. The resistance value can be calculated out from the number of the charging and the discharging period. The method is easy to be realized by using single chip with comparator build in, providing the measuring function of multi-channel, multi-range and high accuracy. Combining with thermistor, hygristor and photoresistor, the invented circuit can constitute the measuring, controlling and alarming devices based on temperature, humidity and light intensity.

The invention relates to a sunflower-type solar energy generating system. In the system, a photoresistor is adopted as a light intensity induction part, an ARM7 microprocessor and a peripheral circuit thereof are taken as controllers, and the light intensity induction part and the controller are combined with a solar energy support designed into a biaxial structure, thereby realizing that a solar energy battery board faces the direction of the maximum solar illumination intensity all along so that the effective generated energy is greatly increased. After one-day tracking is completed, the system automatically restores to a state of waiting the morrow sun to rise, thereby realizing diurnal cycle operation. Moreover, the system is integrated with a liquid crystal display (LCD) screen and a storage battery charging and discharging circuit utilizing a maximum power point tracking (MPPT) technology, thereby breaking the mode that the traditional solar energy generating system comprises a plurality of independent units. Such design reduces the volume and the weight of equipment and moreover reduces the operation power consumption of the whole system.

The present invention relates to a light emitting diode (LED) lamp. It includes several LED elements, human body inductor (ultrasonic sensor, electrofocusing infrared sensor, LED reflected infrared sensor and others), light-sensitive element (photoresistor, photodiode and phototransistor, etc.), lamp panel, time regulating switch, control circuit and LED lamp base with bulb and copper lampholder in which it utilizes human body inductor to produce detection effect for human body, generally the LED lamp is in state of low intensity of light, when human body is close to it, then low intensity oflight can be changed into high intensity of light, and when the intensity of the light is insufficient, the lamp source can be completely opened or semi-opened, and when the intensity of light is sufficient, the lamp source can be switched off.

The application discloses a manufacturing method of an inversion structure of a III semiconductor light-emitting device. The manufacturing method comprises the following steps: growing a substrate, a buffer layer, an n type nitride semiconductor layer, an active layer, and a p type nitride semiconductor layer successively from bottom to top to form an epitaxial structure; depositing a transparent conductive layer; carrying out yellow-light etching process and definition to form an isolation slot; depositing a first insulation layer structure; depositing a P type contact metal unit and an N type contact metal unit simultaneously; depositing a second insulation layer structure; depositing an inverted P type electrode and an inverted N type electrode and removing a photoresistor by using a stripping process so as to obtain a wafer; and carrying out reduction, scribing, splitting, testing ,and sorting on the wafer. According to the invention, the linear convex table surface technology is used for replacing the multi-hole vias technology in the prior art. The first insulation layer structure is a Bragg reflection layer-metal level-multilayer oxide insulating layer unit and serves as a reflector structure and an insulation layer, and thus an inverted reflector structure design and a first insulation layer are replaced and a metal protection layer is also removed.

The invention is a solar tracking locator in energy source technical field for the sunlight collecting system, where the visible light antireflex coating is coated on two surfaces of a biconvex nonspherical len, a fixer fixes an infrared filter, the biconvex nonspherical len, a photosensitive resistor array and a step motor, the infrared filter is located in front of the biconvex nonspherical len, and the center of the photosensitive resistor array is located on the focus of the biconvex nonspherical len; the sunlight firstly passes through the infrared filter, then passes through the visible light antireflex coating, and then passes through the biconvex nonspherical len and focuses on the photosensitive resistor array, a control circuit judges the solar position variation according to the current variation of the photosensitive resistor array and outputs control signals to control the step motor, the step motor regulates the pitching and horizontal angles of the whole system according to the control signals, so as to ensure the system to be right opposite to the sun. And the invention raises visible light collecting efficiency, improves solar tracking accuracy and largely reduces system cost.

A method is implemented in a cellular phone having a display, a CPU, a photosensitive element (e.g., photoresistor) on a surface, and a control circuit coupled to the photosensitive element. The method comprises the steps of switching the cellular phone to an automatic background brightness control mode; measuring a voltage between two terminals of the photosensitive element by the CPU; and adjusting a background brightness of the display with respect to the measured voltage. Accordingly, CPU may lower the background brightness of the display as the voltage decreases, while increasing the background brightness of the display as the voltage increases. This can reduce power consumption of cellular phone display in a strong light environment.

The invention discloses a photovoltaic double-axis tracking system and a control method, which belong to the technical field of solar power generation. The photovoltaic double-axis tracking system is characterized in that four photoresistors are installed on the upper support of the original double-axis tracking system. The control method comprises the following steps of: (1) setting an initial value; (2) calculating n and 8; (3) calculating Omega sr, Omega ss, tsr and tss; (4) calculating tz, judging whether tz is greater than or equal to tsr, if so, executing (5), or else, returning to (4); (5) judging whether the weather is cloudy, if so, returning to (5), or else, executing (6); (6) calculating Alpha s and Nu s, and adjusting S Alpha and S Nu; (7) comparing four resistances, judging whether the equation R9=R10=R11=R12 is met, if so, keeping S Alpha and S Nu, and executing (12), or else, executing (8); (8) judging whether the inequality R9= / R10= / R11= / R12 is met, if so, sequentially adjusting S Alpha and S Nu, executing (12), or else, executing (9); (9) judging whether the inequality R9=R10= / R11=R12 is met, if so, adjusting SAlpha, and executing (12), or else, executing (10); (10) judging whether the inequality R9=R11= / R10=R12 is met, if so, adjusting SNu, and executing (12), or else, executing (11); (11) searching the minimum resistance Rmin, and sequentially adjusting SAlpha and SNu; (12) judging whether Delta is concluded, if so, executing (13), or else, returning to (12); (13) judging whether tz is greater than or equal to tss, if so, stopping the system; or else, executing (5).

An improved highway barricade light, with increased visibility and operational life span that can be installed on a common traffic channelizer, without preventing the stacking of the channelizer. A base with hand-hold features is attached to the top of a traffic channelizer. The base holds a rechargeable power supply, control circuitry, switch, solar cell and a photoresistor. A reflector ring attaches to the base and holds an array of light emitting diodes (LED) circumferentially around the device. The LED's can be controlled to create a variety of flashing patterns to direct motorists, including, but not limited to, constant burn, flashing, clockwise, counter-clockwise, upward, downward and random. A transparent or translucent cover attaches to the base to protect the components, and may be flat, conical or dome shaped.

The invention relates to an infrared-camera-device-based adaptive control system. A gain value of automatic gain control of an infrared camera device is obtained; if the gain value is larger than or equal to a preset first threshold value, the infrared camera device is controlled to start a black-and-white shooting mode; and the brightness of an infrared ray of the infrared camera device is adjusted in real time based on the gain value, so that the infrared camera device can adapt to an external shooting environment. According to the technical scheme, the black-and-white shooting mode can be started only by determining the gain value size corresponding to the current external shooting environment brightness information instead of setting a photoresistor, so that the infrared camera device can enter a night working state. Furthermore, the infrared camera device can adjust the brightness of the infrared ray based on changing of the external shooting environment, thereby avoiding an overexposure phenomenon, improving an image effect, and reducing power consumption of the infrared camera device.

The invention discloses an array photosensitive resistor laser collimation deformation measuring method and apparatus. The method comprises, first of all, determining a reference point (1) and a measuring point (2), arranging one laser module (3) for emitting a laser towards a fixed direction on the reference point (1), and arranging one array photosensitive resistor displacement sensor (4) on the measuring point (2); emitting the laser towards the measuring point (2) through the laser module (3) to form a stable reference line, wherein the laser leaves a stable light spot on the array photosensitive resistor displacement sensor (4); calculating a laser light spot center point through a laser light spot influence interval; and through scale change of the laser light spot center point on the array photosensitive resistor displacement sensor (4), identifying displacement change of a target object in an array photosensitive resistor direction. The method and apparatus provided by the invention can realize displacement monitoring of an object body relative to the reference line so as to realize multiple monitoring items including horizontal displacement, vertical displacement, inclination, disturbance and the like in the field of deformation monitoring.

A marine warning sign, in the shape of a right prism, having a frame forming a square of other polygonal shaped enclosure with straight sides and open front and rear faces. In the front face is positioned an assembly comprised of a transparent panel under which is a graphics panel. On the obverse face of the graphics panel is printed some desired warning indicia. A rear panel enclosed the rear face of the frame. A border, in the same shape as the frame, surrounds the indicia. The border is formed of electroluminescent tape. The electroluminescent tape illuminates when energized by an electrical power control located within the sign. The electrical power control is powered by a rechargeable battery which powers an a / c to d / c inverter. The electrical power control is switched on and off during night and day, respectively, by a circuit in the electrical power control comprised of a comparator having a bridge circuit with a photoresistor as one input. Mercury level switches also are provided to disable the electrical power control if the sign is tilted from its desired level attitude. The inverter provides alternating current to two leads of the electroluminescent tape, causing the electroluminescent tape to illuminate.

The invention relates to a pigment dispersion, a pigment photoresistor and a preparation method thereof. The pigment dispersion comprises 5 to 20 weight percent of pigment, 1 to 20 weight percent of dispersant, 0 to 10 weight percent of auxiliary dispersant, 0.05 to 20 weight percent of dispersion resin and 40 to 85 percent of first solvent. The pigment dispersion with a small particle size and anarrow particle size distribution range has high storage stability and high colorimetric performance. The pigment photoresistor prepared on the basis of the pigment dispersion meets the material selection requirements of color optical filters and liquid crystal displays; and the color optical filters prepared on the basis of the pigment photoresistor is high in color saturation, so the color display quality of the liquid crystal displays having the color optical filters is improved obviously.

The invention discloses a sunlight lead-in daylighting device, which comprises a light detector, a signal processing part, a lead-in optical fiber part and a mechanical transmission part for driving, which are assembled together, wherein the light detector comprises a fine tracking sensor, a coarse tracking sensor and a small diameter lens arranged in the center of the top of the detector; the coarse tracking sensor consists of four sensitive silicon photocells or photoresistors, which are distributed on four vertexes of an inscribed square of the top of the detector and take the top center of the detector as the center of a circle, and form 45-degree included angles against the top plane of the detector; the fine tracking sensor is a 4-quadrant detector; and the distance between the small diameter lens and the 4-quadrant detector is slightly smaller than the focal distance of the lens. The device utilizes a full photoelectric tracking mode to realize the wide-range, high-precision and cheap focus tracking of sunlight so as to realize the daylighting.

The invention discloses a super-mapping machine which comprises a remote sensing and telemetering system, a three-dimensional attitude system and a central control and positioning communication system, wherein the remote sensing and telemetering system comprises an infrared laser light source (2), a search imaging unit (3), an image processing unit (4), an astronomical telescope imaging unit (5) and a photoresistor (1); the three-dimensional attitude system comprises a pitching pose unit (6), a horizontal axis (9), a horizontal attitude unit (7), a heading attitude unit (8) and a vertical axis (10); the central control and positioning communication system comprises a central processing unit (11), a man-machine interaction unit (12), a storage unit (13), a global positioning unit (14), a communication unit (15), an image recognition unit (16) and a power supply unit (17). The invention provides a field portable machine system which can acquire high-precision three-dimensional images in a geodetic coordinate system under the range finder-free conditions.

The invention discloses a deformation automatic monitoring and early warning apparatus applied to road side slopes, comprising a steel support (1), an iron box (2), a point light source (5), a photoresistor (6), a light blocking ruler (4), an iron pole (7), a current wireless sensor (10), and a warning apparatus (11) installed beside a road on the bottom of a side slope. According to the invention, side slope deformation drives the iron pole and the light blocking ruler to move with a same amplitude, and the transparency at different scales of the light blocking ruler is different, which causes the light intensity of the point light source irradiating onto the photoresistor through the light blocking ruler to change; the instantaneous deformation of side slope soil bodies is sent to a monitoring station through the current wireless sensor in a current change mode. The upper section, central section and lower section of a side slope are meanwhile provided with the apparatus, thereby realizing all-weather automatic monitoring of side slope local and whole deformation and deformation rates; in addition, the warning apparatus installed beside a road can give an alarm in advance to vehicles in side slope dangerous sections.

The invention discloses a visible light photosensitive resistor and a manufacturing method thereof. Rare-earth chloride is adopted to replace CyCl2, the rare-earth chloride with the weight percentage being 0.1% is added in photosensitive layer materials comprising CdS, CdSe and CdCl2 and is the mixture of one or two or more of holmium chloride, neodymium chloride, dysprosium chloride and samarium chloride, the matching ratio of the CdS to the CdSe to the CdCl2 is adjusted, and the content of the rare-earth chloride is quite small so that the material cost of the visible light photosensitive resistor cannot be affected; by combining the rare-earth chloride with the materials comprising the CdS, the CdSe and the CdCl2, the dark resistance of the visible light photosensitive resistor can be increased, and the bright resistance of the visible light photosensitive resistor can be reduced. The visible light photosensitive resistor has the advantages that the sensitivity of the visible light photosensitive resistor can be improved, the rare-earth chloride is high in stability, the visible light photosensitive resistor is not likely to be changed in the aging process, other performance parameters of the visible light photosensitive resistor are not reduced, the stability of the visible light photosensitive resistor is high in the aging process, and the rejection rate is greatly reduced.

The invention discloses a voltage detection leakage protection device for an electric water heater, which comprises a main switch, a leakage current mutual inductor, a leakage detection circuit, an optical coupler, a threshold voltage detection circuit, a protective execution circuit and a mechanical release / attracting device, wherein the main switch comprises a live wire switch, a zero wire switch and a ground wire switch respectively; the leakage detection circuit and the protective execution circuit are electrically connected between a live wire and a ground wire respectively; the leakage current mutual inductor detects leakage currents on the live wire and a zero wire, and sends information to the leakage detection circuit; a neon tube of the optical coupler is electrically connected between the zero wire and the ground wire and detects a threshold voltage difference between the zero wire and the ground wire; a photoresistor of the optical coupler is electrically connected with the threshold voltage detection circuit; the leakage detection circuit and the threshold voltage detection circuit send information to the protective execution circuit; and the protective execution circuit controls the mechanical release / attracting device to control turning on and turning off of the main switch. The voltage detection leakage protection device is simple in structure, convenient to use, and high in stability and reliability, and saves a large amount of material cost.

The invention discloses a dust removal and heat dissipation type monitor. The dust removal and heat dissipation type monitor includes a shell, a transmitting groove and a receiving groove are symmetrically formed in the inner wall of the shell. A light source and a photoresistor are respectively fixed on the inner walls of the transmitting groove and the receiving groove; a movable cavity is formed in the side wall of the shell, a heating box is fixed to the bottom of the movable cavity, a heating piece is fixed into the heating box, a cooling box is fixed to the top of the movable cavity, a heat insulation plate is fixed to the inner wall of the cooling box, and a plurality of partition plates arranged at equal intervals are jointly fixed to the outer walls of the two sides of the coolingbox and the outer wall of the two sides of the heating box. The dust removal and heat dissipation type monitor has the advantages that when dust appears on the surface of the monitor lens to hinder shooting; when the light source emits light, the light emitted by the light source cannot well irradiate the photoresistor, so that the resistance value of the photoresistor is changed, wind power is generated to clean dust, the dust can be cleaned in time, the dust cannot be gathered for a long time to cause that shooting is thorough and cannot be performed, and normal use of the monitor is further ensured.

The invention discloses a method for realizing automatic adjustment of LED (light-emitting diode) lamps. The method comprises the following steps of: sensing the peripheral light intensity information based on a light sensitive resistor; and adjusting the current passing through the LED lamps by modulating the duty ratio of PWM (pulse width modulation) by an adjustment potentiometer according to the light intensity information. The embodiment of the invention also discloses a device for realizing automatic adjustment of LED lamps. The device comprises a sensing module and a control module, wherein the sensing module is used for sensing the peripheral light intensity information based on the light sensitive resistor; and the control module is used for adjusting the current passing through the LED lamps by modulating the duty ratio of PWM by the adjustment potentiometer according to the light intensity information. The method and the device have the following advantages: the electric energy can be effectively saved by automatically dimming light according to the conditions of the surroundings, thus avoiding that desk lamps still emit light according to the same power under the condition that the light ray is brighter, ensuring fewer LEDs to emit heat and prolonging the service lives of the LEDs.