277 results about "Light induced" patented technology

The invention discloses an MXene-based coating with a near-infrared light induction interaction effect and a preparation method of the MXene-based coating, and relates to the technical field of coatings. The preparation method comprises the following steps: a nano microcapsule and MXene powder are subjected to in-situ growth to form a composite dispersion liquid, the nano microcapsule is of a core-shell structure, a shell layer material is selected from at least one of polyaniline, polyurea, polyurethane, polyacrylate and silicon dioxide, a core contains a functional substance, and the surface of the core contains a porous material. The functional substances are selected from at least two of a corrosion inhibitor, a fluorescent indicator and a lubricant; adding a thermal reversible coating containing dynamic covalent bonds and a curing agent into the composite dispersion liquid, and uniformly mixing to form a homogeneous coating; and spraying the homogeneous coating on the surface of a base material, and curing to obtain the coating. The coating is high in mechanical strength, has a near-infrared light triggered self-repairing function, is high in self-repairing rate, and can realize multiple functions such as fluorescence labeling, corrosion early warning and lubrication coordinated regulation and control.

The invention relates to the technical field of lamps, in particular to a light sensor, a lamp and a using method. A light sensor includes: a condenser lens; a light sensor; the shell is provided with a containing space, a through hole is formed in the shell, the condensing lens and the light sensor are fixedly arranged in the containing space of the shell, part of the condensing lens is arranged in the through hole, the condensing lens and the light sensor are correspondingly arranged, the condensing lens is used for collecting light outside the shell, and the light sensor is used for sensing the light outside the shell. And the light sensor is used for sensing the change of the light rays collected by the condensing lens. The invention provides a light sensor, a lamp and a use method, and aims to solve the problems that a lighting element and a sensing element are fixed through two parts in the design process of an existing sensor, and in later assembly and use, due to the fact that the lighting element and the sensing element have installation errors, positioning of the lighting element and the sensing element is not accurate, and the cost is low. The use effect of the sensor is affected, and the experience is poor.

The invention discloses a light-sensing external trigger signal output device for laser far-field parameter analysis, comprising: a light signal detector, used for collecting laser signals irradiated on a target plate and outputting a pulse current signal; a signal primary amplification module, used for converting the pulse current signal into a pulse voltage signal and amplifying the pulse voltage signal; a signal superposition amplification module, used for amplifying the pulse voltage amplification signal output by the signal primary amplification module again; a laser pulse signal judgment module, comprising a comparator, used for setting a signal judgment threshold value, the comparator being connected to a monostable trigger, and the monostable trigger sending a trigger signal when the pulse signal is greater than the signal judgment threshold value set by the comparator; an MCU main control module, used for interrupt processing, trigger signal delay and output frequency setting, trigger signal output and transmitting a timing control signal to an imaging camera; a power management module, connected to an external power supply and supplying power to the remaining modules.

The utility model discloses a photoelectric detector and a photoelectric sensing system, the photoelectric detector comprises a substrate layer, one side of the substrate layer close to an n-type electrode layer is provided with first grooves corresponding to contact columns, and the first grooves are respectively embedded with the corresponding contact columns; one side of the light sensing layer is fixedly connected with the substrate layer, the other side of the light sensing layer is provided with a plurality of second grooves, the light sensing layer comprises a light sensing area and a non-light sensing area, the light sensing area is used for absorbing incident light, and the second grooves are used for refracting and scattering the incident light; the p-type electrode layer is arranged on one side, far away from the substrate layer, of the non-photoinduction area; according to the photoelectric detector provided by the utility model, the sensitivity of the photoelectric detector can be improved.

An electronic device includes a light sensing system and an at least partially translucent housing member positioned over at least the light sensing system. The housing member has an interior surface and an at least partially translucent exterior surface, wherein the interior surface includes multiple facets configured to direct light impinging on a translucent portion of the exterior surface toward the light sensing system. The facets are configured to create a prismatic effect, such as the effect produced by a Fresnel lens, that directs light toward the light sensing system. The light sensing system optionally includes a light sensor and / or a light guide. Where the electronic device is a lighting control device, the electronic device further includes a processor coupled to the light sensing system and operable to generate lighting control signals responsive to receipt of light sensing signals from the light sensing system.

This invention discloses an online multi-band photosensitive decoupling method for monitoring the forming process of micro-optical components. This method allows for online monitoring and correction of forming process parameters, controlling the forming scale of the micro-surface topology of optical components and diagnosing the operating conditions of equipment. The method includes the following steps: selecting process parameters based on desired height; acquiring multi-band illuminance curves of light during the processing from multiple angles online and extracting feature values ​​through decoupling; combining the correlation between photosensitive feature values ​​and process parameters from past experience data; predicting processing parameters in real time, including hot-pressing temperature, hot-pressing pressure, and holding time; characterizing the surface stress of micro-forming using thermal melting compression theory; and finally, correcting equipment conditions and controlling the micro-forming scale through a feedback control algorithm. This method enables efficient online prediction and diagnosis of multiple parameters in the micro-optical component forming process and solves the time-varying problem in the micro-optical component manufacturing process.

The invention relates to the technical field of marine aquaculture, in particular to marine intelligent purse seine aquaculture management equipment which comprises an automatic bait casting system, a water quality detection module, an underwater inspection module, an intelligent sensing module, a photovoltaic power supply system, a light inducing device and an informatization center control module. Through real-time monitoring and intelligent early warning, the risk of sudden change of water quality is reduced, accurate feeding is realized through combination of an automatic bait casting system and fish shoal behaviors, the bait utilization rate is improved, resource waste is reduced, the fish shoal state and the purse seine safety can be dynamically monitored through an underwater patrol module, management timeliness and visibility are enhanced, and the system is suitable for popularization and application. A photovoltaic power supply system and low-power-consumption equipment are adopted, the long-time stable operation capacity is achieved, and the device adapts to the complex open sea environment.

The invention discloses an intelligent ring system and a light interference suppression method thereof, and the system comprises a ring housing which is a circular ring with a ring cavity; the flexible printed circuit board is used for loading various electronic and non-electronic elements required by the ring system, and the flexible printed circuit board is arranged in the ring shell and is encapsulated and fixed through epoxy resin; the light-emitting module is composed of one or more wavelength light-emitting diodes, and the light-emitting module is coupled to the flexible printed circuit board; the light sensing module is composed of photodiodes, is coupled to the flexible printed circuit board and is matched with the light emitting module to complete PPG signal acquisition; the method has the beneficial effects that the optical crosstalk inside / outside the finger ring can be effectively inhibited, so that the quality of a finger PPG signal is optimized, the dependence on a signal processing algorithm is reduced, and finally the calculation accuracy of physiological indexes such as HR, SpO2, HRV and the like is improved.

A method and system for light induced transfer of components (15) from a donor substrate (10) to an acceptor substrate (20). The donor substrate (10) comprises a transparent carrier (11) configured to carry the components (15) facing the acceptor substrate (20), and a release stack (S). The release stack (S) comprises a light-absorbing layer (12), a decomposition layer (16), a melt layer (13), and an adhesive layer (14). The light-absorbing layer (12) has a high absorption coefficient for absorbing the light beam (L) causing heat conduction to the melt layer (13). The light-absorbing layer (12) remains solid while the melt layer (13) is melted. The adhesive layer (14) adheres the components (15) to the melt layer (13) while the melt layer (13) is solid and releases adhesion when the melt layer (13) is melted (M). The decomposition layer (16) has an evaporation temperature above the melting temperature of the melt layer, and forms a bubble (17) stimulating the release and transfer when the melt layer 913) is liquid.

The invention relates to a roadway surrounding rock deformation monitoring device, system and method, and belongs to the field of industrial and mining equipment. According to the technical scheme, the roadway surrounding rock deformation monitoring device comprises a laser emitting assembly and a plurality of laser sensing assemblies, the laser emitting assembly comprises a plurality of laser emitting units, each laser emitting unit comprises a mounting frame, two laser positioning lamps are rotationally mounted in each mounting frame, and the multiple laser emitting units are arranged in the extending direction of a roadway; the laser induction assemblies are located in the projection directions of the multiple laser positioning lamps, and the multiple laser induction assemblies are electrically connected with the controller. According to the scheme, the laser emission unit is arranged to be a plurality of groups of paired laser positioning lamps, the projection angles of the laser positioning lamps are adjustable, and the laser induction assemblies with the corresponding number are matched, so that multiple positions of the surrounding rock of the roadway in one section are monitored, the monitoring is more comprehensive and perfect, and the reliability of monitoring data is improved; and the angle-adjustable form can adapt to roadways with different section shapes and sizes, so that the use is more flexible.

The novel beacon vessel comprises a base and further comprises a water flow power generation device and a solar power generation device which are installed on the base, the base is arranged to be cylindrical, a notch is formed in the middle of the base, an impeller of the water flow power generation device overhangs in the notch to rotate, and the cylindrical base rotates in real time in the water flow direction. A solar power generation device is mounted on the top surface of the base at the rear part of the notch, and is provided with a foldable turnover mechanism, so that a solar panel of the solar power generation device is always positioned at the optimal sunlight receiving angle; multi-source power generation is achieved through the water flow power generation device and the solar power generation device, redundant electric energy is stored for standby application and delivery while power is supplied to the beacon light and other electric equipment on the device, real-time data acquisition is achieved through the camera and the light induction sensor, and the device is simple and compact in structure, reliable in operation, low in cost, convenient to install and high in practicability. Power generation is stable and efficiency is high.

The invention provides a preparation method and application of a near-infrared light induction type silk fibroin nano preparation, and belongs to the technical field of medical preparations. And dropwise adding an ICG solution into the silk fibroin nano-particle solution, and then adding a ferric trichloride solution for reaction to obtain a precipitate, namely the near-infrared light induction type silk fibroin nano-preparation. The nano preparation prepared by the method disclosed by the invention can realize synergistic interaction of two treatment mechanisms, and the anti-tumor effect is remarkably improved.

The utility model discloses an oil acid value detection sensor, and belongs to the technical field of oil detection, and the oil acid value detection sensor comprises a base, a shell and an acid value detection assembly. The base is connected with external equipment; the shell is arranged on the surface of the base, a main channel, a detection channel and two shunt channels are arranged in the shell, the main channel is flush with the detection channel, the two ends of each shunt channel are communicated with the main channel and the detection channel respectively, and the sectional area of the main channel is larger than that of each shunt channel; the sectional area of the shunting channel is larger than that of the detection channel; the acid value detection assembly comprises a light emitting module, a light filtering membrane and a light sensing module, the light emitting module is arranged on the surface of the shell and located on one side of the detection channel, the light sensing module is arranged on the surface of the shell, located on the other side of the detection channel and aligned with the light source, and the light filtering membrane is arranged between the detection channel and the light sensing module. According to the invention, the accuracy of acid value detection can be improved.

To provide an optical sensor capable of performing highly accurate optical sensing of a scene.SOLUTION: The optical sensor includes a unit D1 including x blocks 11, for example, three (x = 3) blocks a, b, and c, each having a plurality of pixels 12 arranged in a first direction 11A in a plan view. The pixels 12 are arranged at a pixel pitch D1 in the first direction P1. The three blocks a, b, and c are arranged side by side in a second direction D1 orthogonal to the first direction D2, and are arranged to be shifted from each other by P1 / 3 in the first direction D1. For example, the light receiving elements 11A and 10b each including the units 10a corresponding to the number of stages of the TDI are arranged so as to partially overlap each other in the D1 in the first direction, and the optical sensing is performed using the blocks a and b in which the positional deviation of the pixels 12 is minimized. In addition, by increasing the size of each of the light receiving elements 10a and 10b in the second direction D2, inclination at the time of mounting, poor connection, and the like are suppressed.SELECTED DRAWING: Figure 10

This invention discloses an energy-saving control method for elevator light curtains and a low-power wireless communication light curtain, relating to the field of elevator control technology. The energy-saving control method for elevator light curtains includes: Step 1, establishing an energy-saving control environment, which includes: a camera, a light-sensing module, a controller, and a central control center. The central control center is used to regulate the operating status of each elevator. Step 2, establishing control logic, which includes: the central control center being configured to: if the current time is within a preset low-traffic period, acquire video data fed back by the camera; identify and analyze the number of people, their positions, and the items they are carrying in the elevator based on the video data; adjust the light curtain monitoring range based on the identification results; and output a light curtain adjustment control command to the corresponding controller. The controller is configured to: if it receives a light curtain adjustment control command, control the opening and closing of the corresponding number of transmitters; acquire monitoring signals fed back by the receiver; and control the elevator control system response based on the monitoring signals. This application has the effect of reducing energy consumption.

The invention discloses a display device and a display device control method.The display device comprises a display module, a control module, a gesture sensing module and a light sensing module, and the light sensing module is used for detecting the brightness of ambient light and generating an ambient light brightness signal; the control module is used for adjusting working parameters of the gesture sensing module according to the ambient light brightness signal; the gesture sensing module is used for sensing an instruction gesture made by a user and generating a corresponding sensing signal; and the control module is also used for generating a corresponding control signal according to the sensing signal and controlling the display module to display through the control signal. Therefore, the display device can be controlled by identifying the gesture of the user, so that diversified requirements in different scenes are met, the operation convenience is improved, the working parameters of the gesture sensing module are dynamically adjusted according to the ambient light brightness condition, the accuracy and reliability of instruction gesture identification can be improved, and the energy loss is reduced.

The utility model discloses a cloth inspecting machine defect marking device which comprises an installation frame, a winding roller and an unwinding roller, the winding roller and the unwinding roller are both installed on the installation frame, a detection frame is fixedly installed on the installation frame, a strip-shaped light-emitting plate is fixedly installed on the inner top wall of the detection frame, a light-receiving sensing plate is installed on the inner wall of the detection frame, and the strip-shaped light-emitting plate is fixedly installed on the strip-shaped light-emitting plate. The light-receiving sensing plate is located at the bottom of the strip-shaped light-emitting plate, and a processor is integrated in the mounting frame. According to the device, the strip-shaped light-emitting plate and the light-receiving sensing plate are matched to detect flaws of cloth conveyed at the bottom, a plurality of flaw positions can be marked through the marking assembly subsequently, subsequent repairing is facilitated, meanwhile, mark points are air-dried through the air drying assembly, it can be ensured that ink is completely dried before rolling, and the quality of the cloth is improved. Therefore, the ink is prevented from staining other parts of the cloth, the dried mark is firmer and is not easy to erase or fuzzy, and subsequent quality inspection and tracking are facilitated.

The invention discloses a wavelength selective photoresponse strontium-based metal organic framework eutectic material as well as a preparation method and application thereof. A metal node of the material is strontium ions, N, N '-bis (5-isophthalic acid) naphthalimide is used as a ligand, anthracene and a derivative thereof are used as objects, N, N-dimethylformamide is used as a solvent, and the material is obtained through solvothermal reaction. The material is composed of an electron donor (D) and an electron acceptor (A), and is a strontium-based MOF eutectic with an infinitely extended pi stacked A-D-D-A configuration. The MOF eutectic material has lattice characteristics of a tetragonal crystal system, a space group is I 41 / a, and cell parameters are a = b = 28.42240 (10), c = 13.71600 (10), and alpha = beta = gamma = 90 degrees. Sr-NDI at An has unique wavelength selective photoresponse property: ultraviolet light triggers [4 + 4] dimerization of an object anthracene, red light excites [4 + 2] reaction of anthracene and singlet oxygen, and near-infrared light induces generation of free radicals.

The invention belongs to the technical field of optical fiber temperature measurement, and discloses a passive device temperature measurement light path feedback device and a feedback method, which can perform light detection on whether a passive device temperature measurement light path optical fiber is abnormally interrupted or not, can block incidence of ambient light through a shell assembly with a closed light transmission channel, improves the accuracy of detection feedback, and improves the detection accuracy of the passive device temperature measurement light path. The light output by the optical fiber can be subjected to diffuse reflection through the inner wall of the channel subjected to texturing treatment, the light can be detected by a light sensing device, the response speed is increased, the light intensity of the light subjected to diffuse reflection is reduced, the problem that the light sensing device is burnt down due to direct incidence of high-power light can be avoided, and the service life of the light sensing device is prolonged. And meanwhile, the light emitted by the optical fiber is propagated in the light propagation channel in a diffuse reflection manner, so that the requirement on the notch of the section of the end part of the optical fiber is not high, the process requirement is reduced, and the time is saved.

The utility model discloses an infrared sensor and a circuit board, and relates to the technical field of infrared sensors, the infrared sensor comprises a pedestal, a signal acquisition chip, and a light sensing assembly arranged on the pedestal; wherein the base is provided with a first cavity and a plurality of mounting holes communicated with the first cavity; the signal acquisition chip is arranged in the first cavity of the base and electrically connected with the light sensing assembly, and the signal acquisition chip is used for receiving an infrared sensing signal acquired by the light sensing assembly and outputting a corresponding acquisition signal; and after the signal acquisition chip is arranged in the first cavity, a plurality of pins of the signal acquisition chip penetrate through the plurality of mounting holes in a one-to-one correspondence manner and extend towards the direction of the second surface of the base by a first height, so that after the plurality of pins are connected to the circuit board, the second surface of the base and the circuit board are spaced by a second height. Therefore, heat conduction from the circuit board to the infrared sensor can be reduced, and the heat insulation effect of the infrared sensor is improved.

A light detection module, a light detection method and a display device are provided. The light detection module includes N light sensing circuits, a control circuit, a capacitance integrating conversion circuit, and a processing circuit; N is a positive integer; wherein the N light sensing circuits respectively sense light signals of different colors to generate corresponding photocurrents; the control circuit is configured to control to provide photocurrents generated by the light sensing circuits to a capacitance integrating amplifying circuit in a time division manner, and to control a conversion parameter of the capacitance integrating amplifying circuit; the capacitance integrating conversion circuit is configured to perform integrating conversion on the photocurrent according to the conversion parameter and an integration time, to obtain an analog output voltage; the processing circuit is configured to obtain characteristics of the light signal according to the analog output voltage. In the present disclosure, the current integration method is adopted by the capacitance integration conversion circuit, and the photocurrent is converted according to the integration time, so that the number and area of the photodiodes connected in parallel in the light sensing circuit can be reduced by increasing the integration time, the space and cost are reduced.

The application relates to a light-sensing detection structure and a mobile lighting device. The light-sensing detection structure comprises a head part bin, a metal substrate arranged in the head part bin, a lens, a light-shielding bowl and a light sensor. The metal substrate, the lens and the light sensor are fixed in the head part bin, and the metal substrate is located between the lens and the light sensor. The light-shielding bowl is fixed on the metal substrate and located between the metal substrate and the lens. In the light-sensing detection structure, a light inlet hole is arranged outside the projection of the light-shielding bowl on the metal substrate along a light inlet direction, and the light sensor senses external brightness through the light inlet hole. The light-shielding bowl can resist outgoing light and prevent the outgoing light from escaping and entering the light inlet hole. The incident light can enter the light inlet hole through the gap outside the light-shielding bowl and be received and detected by the light sensor. Since the light-sensing detection structure does not have other obstacles to block the outgoing light, the light-sensing detection structure has the advantages of large light flux and high light emission rate in cooperation with the irradiation of the light emitter, can irradiate a complete light spot around, and has a better lighting effect.

The invention relates to the technical field of vehicle lighting, in particular to an electric vehicle photoinduction self-adaptive headlight system which comprises a deceleration state recognition module, an illumination trend judgment module, a charge state division module, a lighting power setting module and an output control execution module. According to the method, a deceleration state identification result is established by synchronously analyzing a current change direction and a brake signal state, a continuous sampling illuminance change rate is introduced to construct a trend judgment index, a low-illuminance approaching trend is judged in combination with an illumination decline intensity and a continuous period, and then the real-time charge state of a battery is collected and affiliated to a grading label; a target output power and an adjusting rhythm are set by matching a power regulation and control strategy, a linearly or non-linearly increasing lightening power sequence is set under different electric quantity conditions, a power control result is converted into a PWM instruction to be dynamically output to a headlight driving circuit, and self-adaptive adjustment of the brightness of the headlight of the electric vehicle under the conditions of illumination decreasing and electric quantity changing is achieved.

The invention discloses a photoacoustic stimulated Raman gas detection system and method based on hollow-core optical fiber self-seed injection enhancement, and belongs to the technical field of laser spectrum trace gas detection, the system comprises a light source and beam splitting module, a hollow-core optical fiber seed generation module, a light delay module and a short optical path power amplification module; the main laser beam is split into a first light beam and strong pump light after entering the beam splitter; in the hollow-core optical fiber seed generation module, a first light beam passes through a fifth reflecting mirror, a hollow-core optical fiber seed generation unit, a sixth reflecting mirror and an optical filter, and weak seed light is output; the strong pump light is synchronized with the weak seed light output from the optical filter after entering the optical delay module; in the short-optical-path power amplification module, weak seed light and strong pump light output by the light delay module are combined at a dichroscope and are strictly coaxial, and then are focused by a convex lens and enter a short-optical-path Raman frequency shifter. According to the invention, the oscillation starting threshold of the Raman frequency shifter is greatly reduced by utilizing seed light-induced stimulated radiation.

The utility model discloses an oil detection sensor, and belongs to the technical field of oil detection, and the oil detection sensor comprises a base, a shell and a detection assembly. The base is connected with external equipment; the shell is arranged on the surface of the base, a main channel, a detection channel and two shunt channels are arranged in the shell, the main channel is flush with the detection channel, the number of the shunt channels is two, the two ends of the two shunt channels are communicated with the main channel and the detection channel respectively, and a detection window is formed in the detection channel; the detection assembly comprises a dispersion module, a light sensing module and a moving module, the dispersion module is arranged in the shell, located on one side of the detection window and used for dispersing white light into spectrums with different wavelengths, the moving module is arranged in the shell and located on the other side of the detection window, and the light sensing module is arranged at the moving end of the moving module; and the detector is used for receiving spectrums emitted from the detection window. The oil composition detection efficiency can be improved, and the oil composition detection cost can be reduced.

The utility model provides a bus station, which comprises a photovoltaic array, an energy storage device, an intelligent sensing device and a lighting device, and is characterized in that the photovoltaic array is used for converting solar energy into electric energy and storing the electric energy in the energy storage device; the intelligent sensing device is used for controlling on-off and brightness of the lighting device, the intelligent sensing device comprises at least one of a light sensing switch and an infrared sensing switch, and the light sensing switch is used for controlling on-off of the lighting device according to surrounding illumination brightness; the infrared induction switch is used for inducting whether a person is near the bus station or not and adjusting the brightness of the lighting device according to the inducted result. In this way, the problems of high electrical load and resource waste of the bus station are solved, and the brightness of the lighting device can be intelligently adjusted, so that effective management and distribution of electric power are ensured, the problem of resource waste is effectively solved, and the resource utilization rate is improved.

The invention relates to the technical field of landscape lamp intelligent control, in particular to a landscape lamp intelligent control method and system based on light sensing and timing, and the method comprises the steps: obtaining a seasonal illumination intensity grade group, obtaining a current illumination value sequence, determining a current seasonal illumination intensity grade, carrying out the fault detection of a light sensing unit, and obtaining fault detection data; if fault data exists in the fault detection data, obtaining the state of the landscape lamp, and if non-fault data exists in the fault detection data, extracting a second illumination intensity grade and a fourth illumination intensity grade from the illumination intensity grades in the current season, and determining a target sunrise and sunset interval; landscape lamp intelligent control based on light induction and timing is completed based on the landscape lamp turn-on state or the landscape lamp turn-off state. The intelligent level of the landscape lamp can be improved.

An electronic device includes a light sensing system and an at least partially translucent housing member positioned over at least the light sensing system. The housing member has an interior surface and an at least partially translucent exterior surface, wherein the interior surface includes multiple facets configured to direct light impinging on a translucent portion of the exterior surface toward the light sensing system. The facets are configured to create a prismatic effect, such as the effect produced by a Fresnel lens, that directs light toward the light sensing system. The light sensing system optionally includes a light sensor and / or a light guide. Where the electronic device is a lighting control device, the electronic device further includes a processor coupled to the light sensing system and operable to generate lighting control signals responsive to receipt of light sensing signals from the light sensing system.

The present application discloses a display panel, a display device and a signal acquisition method. The display panel has a display area, at least part of which is multiplexed as a light sensing area. The display panel includes a substrate, a light-emitting functional layer, a photoelectric sensor and a liquid crystal dimming structure. The light-emitting functional layer includes a plurality of light-emitting units and a pixel definition layer having a plurality of pixel openings. The light-emitting units are arranged in the pixel openings and are located in the display area. The photoelectric sensor is located on one side of the substrate and is located in the light sensing area. The orthographic projection of the photoelectric sensor on the substrate is spaced or partially overlapped with the orthographic projection of the light-emitting unit on the substrate. The liquid crystal dimming structure is located on the side of the photoelectric sensor away from the substrate and is located in the light sensing area. The orthographic projection of the liquid crystal dimming structure on the substrate at least partially overlaps with the orthographic projection of the photoelectric sensor on the substrate. According to the embodiments provided in the present application, the display panel, the display device and the signal acquisition method provided in the present application improve the accuracy of the signal collected by the photoelectric sensor.

The invention provides a positioning measurement auxiliary calibration disc and a control method thereof, and the positioning measurement auxiliary calibration disc comprises a disc surface levelness detection module which detects the disc surface levelness of the positioning measurement auxiliary calibration disc through a suspension balance levelness detection device, and obtains disc surface levelness detection information; the calibration disc leveling control module is used for controlling the calibration disc horizontal adjusting device to adjust the disc surface levelness of the positioning measurement auxiliary calibration disc according to the disc surface levelness detection information; the laser point disc surface sensing module is used for sensing laser points of a laser irradiation disc surface through a disc surface light sensing array and acquiring laser point sensing information; and the positioning monitoring auxiliary calibration module judges and corrects the irradiation positioning deviation of the laser point according to the laser point sensing information and the coordinate value of the monitoring laser point in the chessboard coordinate system, and performs laser point monitoring accurate positioning auxiliary calibration.