Abstract: Disclosed herein is a defect inspection system using a three-dimensional (3D) measuring machine, which may include a conveying part disposed between a loading part and an unloading part and configured to hold and transfer a device, a 2D measuring machine provided to face the conveying part and configured to generate a 2D image of the device, a 3D measuring machine provided to face the conveying part in a row with the 2D measuring machine and configured to generate a 3D image of the device, and a processor configured to align and merge the 3D image and the 2D image to generate a device image and configured to determine a defect of the device on the basis of the device image.

Abstract: In some implementations, a method for authenticating and classifying a set of materials comprises: transmitting a visible range light from a light source toward a vessel containing a material sample; wherein the visible range light passes through the vessel containing the material sample, passes through the material sample, and bounces off a HOE located at a bottom of the vessel toward a camera implemented in a smartphone; receiving, by the camera of the smartphone, the visible range light that bounced off the HOE; based on a mapping of each of the visible range light onto an area of an image sensor, generating a holographic optical element that has a plurality of regions, that receives input light reflected or transmitted through a new material, and that filters the input light to a filtered light by each characteristic light spectra, and mapping the filtered light onto the image sensor's area.

Abstract: In an example method, light is emitted towards a sample region, and sample light is received at an interferometer. A subset of the sample light is transmitted from the interferometer to a detector. Transmitting the subset of the sample light includes determining a reference voltage corresponding to the range of wavelengths of the subset of sample light, and a reference temperature. Transmitting the subset of sample light also includes determining a temperature of an environment, determining a bias voltage corresponding to a difference between the reference temperature and the temperature of the environment, and applying, to the interferometer, an input voltage corresponding to the sum of the reference voltage and the bias voltage. The subset of the sample light is measured by the detector, and a spectral distribution of light is determined based on the measurements.

Abstract: According to an aspect of an embodiment, operations may comprise receiving a LIDAR scan of a scene from a LIDAR of a vehicle with the scene comprising a board, detecting the board in the LIDAR scan, fitting a plane through LIDAR coordinates corresponding to the detected board, projecting the plane from the LIDAR coordinates to a first set of camera coordinates, detecting the board in a camera image from a camera of the vehicle at a second set of camera coordinates, and calibrating the LIDAR of the vehicle and the camera of the vehicle by determining a transform between the first set of camera coordinates and the second set of camera coordinates.

Abstract: A system includes one or more edge devices an integrated management apparatus configured to manage the one or more edge devices. The edge devices include a photodetector. The integrated management apparatus manages a first trained model and a first condition in association with each other. The first condition sets a condition for a photodetector used in generating the first trained model. The integrated management apparatus is configured to deliver the first trained model and the first condition to the edge devices.

Abstract: In a probe data evaluation apparatus, probe data are collected from a vehicle. Provisional map data are generated based on the collected probe data. The generated provisional map data are compared with reference map data, to provide a comparison result. Whether or not to adopt the collected probe data is determined based on the comparison result.

Abstract: Provided is a glass fine particle deposit in which a pH of glass fine particles on a surface of the glass fine particle deposit is 5.5 or more and less than 8.5, in which a color difference ?E*ab with respect to a white calibration plate when the surface of the glass fine particle deposit is measured by the SCI method using a spectrophotometer is 0.5 or more and less than 5. Provided is a method for manufacturing a glass preform including: manufacturing a transparent glass preform by heating a glass fine particle deposit in which a pH of glass fine particles on a surface of the glass fine particle deposit is 5.5 or more and less than 8.5; and measuring the surface of the deposit by the SCI method using a spectrophotometer and determining whether a color difference ?E*ab with respect to a white calibration plate is 5 or more.

Abstract: Embodiments of the present disclosure provide a substrate measuring device in a lithography projection apparatus that provides multiple light sources having different wavelengths. In some embodiments, a lithography projection apparatus includes a substrate measuring system disposed proximate to a substrate stage, the substrate measuring system further including an emitter including multiple light sources configured to provide multiple beams of light, each of at least some of the multiple beams of light having a different wavelength, at least one optical fiber, wherein each of respective portions of the at least one optical fiber is configured to pass a respective one of the multiple beams of light, and a receiver positioned to collected light emitted from the emitter and reflected off of a substrate disposed on the substrate stage.

Abstract: An apparatus for in-situ etching monitoring in a plasma processing chamber includes a continuous wave broadband light source, an illumination system configured to illuminate an area on a substrate with an incident light beam being directed from the continuous wave broadband light source at normal incidence to the substrate, a collection system configured to collect a reflected light beam being reflected from the illuminated area on the substrate, and to direct the reflected light beam to a first light detector, and a controller. The controller is configured to determine a property of the substrate or structures formed thereupon based on a reference light beam and the reflected light beam, and control an etch process based on the determined property. The reference light beam is generated by the illumination system by splitting a portion of the incident light beam and directed to a second light detector.

Abstract: The present invention discloses a method for calibrating controllable phase shifters in a multi-stage staggered Mach-Zehnder interferometer structure on an optical chip, aiming to solve the problem of calibrating the controllable phase shifters in a configurable optical network of the multi-stage staggered Mach-Zehnder interferometers. The technical solution is to calibrate the controllable phase shifters that can be calibrated in the optical network; and then to constitute calibration conditions for and calibrate inner phase shifters that has not been; and finally to constitute calibration conditions for and calibrate outer phase shifters that is not calibrated.

Abstract: A method and a system for optically adjusting an image fusion LiDAR system are provided. The method includes: presetting initial positions of a first detector and a second detector; acquiring signal strengths of the echo signals emitted by diffuse reflection at different positions on a background wall detected by the first detector; determining a first mark position on the background wall according to the signal strengths of the echo signals; and adjusting at least one of a position or an attitude of the second detector according to an echo signal emitted by diffuse reflection at the first mark position, the first detector and the second detector being each a linear array detector.

Abstract: A work coordinate generation device includes a shape register section configured to register shape information about a shape of a work region optically defined on a target which is a work target of a work robot; a first recognition section configured to acquire first image data; a first coordinate generation section configured to generate a first work coordinate which represents the work region of the first target based on a result of recognition of the first recognition section; a second recognition section configured to acquire second image data; and a second coordinate generation section configured to generate a second work coordinate which represents the work region of the second target based on the first work coordinate and a result of recognition of the second recognition section.

Abstract: A system including a robot mean to move a member by using a first camera coupled to the robot, a second camera coupled to the robot, a control device configured to control position of the robot in order to minimize a pixel-wise distance between the member and a target based on alternating input from the first camera and the second camera.

Abstract: In a method of inspection of a semiconductor substrate a first beam of light is split into two or more second beams of light. The two or more second beams of light are respectively transmitted onto a first set of two or more first locations on top of the semiconductor substrate. In response to the transmitted two or more second beams of light, two or more reflected beams of light from the first set of two or more first locations are received. The received two or more reflected beams of light are detected to generate two or more detected signals. The two or more detected signals are analyzed to determine whether a defect exists at the set of the two or more first locations.

Abstract: Embodiments disclosed herein include optical sensor systems and methods of using such systems. In an embodiment, the optical sensor system comprises a housing and an optical path through the housing. In an embodiment, the optical path comprises a first end and a second end. In an embodiment a reflector is at the first end of the optical path, and a lens is between the reflector and the second end of the optical path. In an embodiment, the optical sensor further comprises an opening through the housing between the lens and the reflector.

Abstract: Techniques disclosed herein are directed to detect the presence of false, incorrect, or spoofed Global Navigation Satellite Systems (GNSS) signals. Embodiments may comprise receiving, at a mobile device, a global navigation satellite system (GNSS) signal via a GNSS antenna of the mobile device; determining first movement data based on the GNSS signal; determining second movement data based on data from one or more motion sensors of the mobile device, wherein the first movement data and the second movement data each comprise respective movement-related information regarding the mobile device during a time period; and providing an indication that GNSS error is occurring based on a determination that a difference between first movement data and the second movement data exceeds a threshold.

Abstract: A mounting accuracy measurement chip includes a chip main body; and one or more protrusions provided on a mounting face of the chip main body, which serve as a contact surface with a mounting target at a position shifted from the mounting face of the chip main body. The one or more protrusions are disposed only within a range defined by a circle whose center is center of gravity of the mounting face and whose radius is half the length of the longest distance from center of gravity to the outer edge of chip main body. Further, a mounting accuracy measurement kit includes the above-mentioned mounting accuracy measurement chip and placement portion, having a degree of adhesiveness, to which the contact surface of mounting accuracy measurement chip, which can be placed, adheres.

Abstract: A calibration standard for geometry measurement calibration of a measurement system operating by tactile and/or optical means is provided which includes a flat surface having a structure that is capturable by a measurement system operating by optical and/or tactile means. The structure has a changeable periodicity that is capturable by a sensor in a first direction and/or in a second direction and for a change in the periodicity to code position information and/or direction information. In addition, a method for calibrating a coordinate measuring machine operating by tactile and/or optical means and to a coordinate measuring machine for such a method or having such a calibration standard is provided.

Abstract: A shape measurement method includes: acquiring first data of a change of a distance between a first probe and a calibration measurement object and acquiring second data of a change of a distance between a second probe and the calibration measurement object while moving the calibration measurement object in a first direction, the calibration measurement object being rotationally symmetric around an axis parallel to the first direction, the first probe and the second probe being arranged in a second direction orthogonal to the first direction; estimating an error of the movement included in the first data based on the first and second data; acquiring third data of a change of a distance between the first probe and a measurement object while moving the measurement object relative to the first probe in the first direction; and correcting the third data by using the error.

Abstract: A work robot system including a conveying apparatus that conveys an object, a robot that performs a predetermined task on a target portion of the object being conveyed by the conveying apparatus, a controller that controls the robot, a sensor that is attached to the robot and successively detects a position, relative to the robot, of the target portion of the object being conveyed by the conveying apparatus, and a force detector that detects a force generated by a contact between the object and a part supported by the robot. When the robot is performing the predetermined task, the controller performs force control based on a detection value of the force detector while controlling the robot by using a detection result of the sensor.

Abstract: A method of verifying a fault of an inspection unit, an inspection apparatus, and an inspection system are disclosed. The method according to the present disclosure includes: providing a verification reference body which is formed on a frame attached to an inspection system; placing the inspection unit on the verification reference body; obtaining image data of the verification reference body through the inspection unit; verifying a fault of the inspection unit by extracting a movement error and height error of the inspection unit from the image data; and generating a verification result indicating the fault of the inspection unit.

Abstract: A method for initial calibration of a sensor for a driver assistance system of a vehicle, comprising the steps of: detecting a trajectory of the vehicle by way of a reference device disposed externally to the vehicle; ascertaining a sensor axis of the sensor; ascertaining a travel axis of the vehicle from the detected trajectory; and ascertaining an angle between the sensor axis and the travel axis.

Abstract: Identifying object characteristic based on a contrast ratio of an amount of light reflected or absorbed by the object. Part of the object is illuminated, where the object is a material that absorbs or reflects light emitted by the light source. An amount of light absorbed/reflected by the object is measured. A contrast ratio of the absorbed/reflected light is determined by comparing an amount of light absorbed/reflected by the object to a default absorption or reflection value to obtain a difference between the amount of light absorbed/reflected by the object and the default absorption/reflection value. A characteristic of the object is determined based on the contrast ratio. The wavelength of the light from the light source can be substantially the same as the wavelength of the energy used to form the object by a welding process that uses energy to join at least two parts together to form the object.

Abstract: A particle characterisation instrument, comprising a light source, a sample cell, an optical element between the light source and sample cell and a detector. The optical element is configured to modify light from the light source to create a modified beam, the modified beam: a) interfering with itself to create an effective beam in the sample cell along an illumination axis and b) diverging in the far field to produce a dark region along the illumination axis that is substantially not illuminated at a distance from the sample cell. The detector is at the distance from the sample cell, and is configured to detect light scattered from the effective beam by a sample in the sample cell, the detector positioned to detect forward or back scattered light along a scattering axis that is at an angle of 0° to 10° from the illumination axis.

Abstract: A property of a downhole fluid, for example, a chemical species or ion concentration, may be accurately determined and logged based on measurements received from an optical detector where the optical detector is fed information or signals from an optical system coupled to one or more electrochemical probes calibrated for one or more properties of a fluid. The one or more electrochemical probes provide a potential to the optical system based, at least in part, on exposure to the downhole fluid. The optical system receives an optical signal from a light source that is transmitted via a transmission line, such as a fiber optic cable. Downhole information from the optical system is transmitted to the surface via the same or another transmission line. Thus, the signals are in the optical domain rather than the electrical domain. Multiple properties may be measured simultaneously using the same transmission line.

Abstract: The invention relates to a method and to an assembly for calibrating devices 11 for detecting blood or blood components in a liquid, in particular dialysate, which devices comprise a light transmitter 17 and a light receiver 18, and an evaluation unit 20 that receives the signal from the light receiver 18 and is designed such that blood or blood components in the liquid are detected on the basis of the weakening of radiation passing through the liquid. The method according to the invention is based on the fact that the calibration of the devices 11 for detecting blood or blood components is carried out without the use of blood. The calibration is carried out using an absorption standard 30, which has predetermined optical properties in relation to the absorption of the light in blood, the absorption standard 30 being arranged in the beam path 19 between the light transmitter 17 and the light receiver 18.

Abstract: A system for irradiating a microplate may include a light engine with a plurality of light sources, such as light-emitting diodes, included in one or more linear arrays. The plurality of light sources are configured to emit germicidal irradiation, which is directed to the microplate by optical components, such as optical lenses positioned on top of each well of the microplate. The linear array is linearly movable so that as the linear array scans across the microplate, the optical components direct the germicidal irradiation to a plurality of surfaces of each well.

Abstract: Novel methods of synthesis of chelator-targeting ligand conjugates, compositions comprising such conjugates, and therapeutic and diagnostic applications of such conjugates are disclosed. The compositions include chelator-targeting ligand conjugates optionally chelated to one or more metal ions. Methods of synthesizing these compositions in high purity are also presented. Also disclosed are methods of imaging, treating and diagnosing disease in a subject using these novel compositions, such as methods of imaging a tumor within a subject and methods of diagnosing myocardial ischemia.

Abstract: A calibration method is provided.

Abstract: Novel methods of synthesis of chelator-targeting ligand conjugates, compositions comprising such conjugates, and therapeutic and diagnostic applications of such conjugates are disclosed. The compositions include chelator-targeting ligand conjugates optionally chelated to one or more metal ions. Methods of synthesizing these compositions in high purity are also presented. Also disclosed are methods of imaging, treating and diagnosing disease in a subject using these novel compositions, such as methods of imaging a tumor within a subject and methods of diagnosing myocardial ischemia.

Abstract: The present disclosure relates to a calibration insert for the adjustment, calibration, and/or implementation of a function test of an optical sensor that is designed to measure at least one measurand in a medium by means of light, the calibration insert including: an inlet cross-section through which light enters into the calibration insert; an outlet cross-section through which light exits from the calibration insert; and at least one blocking element that is arranged between the inlet cross-section and the outlet cross-section, wherein the blocking element does not entirely let through the light, independently of its wavelength, from the inlet cross-section to the outlet cross-section. Instead, the blocking element partially absorbs, reflects, or scatters the light, wherein the ratio of the intensity of the light at the outlet cross-section to the intensity of the light at the inlet cross-section corresponds to a value of the measurand.

Abstract: A calibration material may be used to calibrate an optical sensor to help ensure that the optical sensor produces accurate measurements. In some examples, the calibration material may be used to calibrate both turbidity measurements made by an optical sensor and fluorometric measurements made by the same optical sensor. The calibration material may be an aqueous mixture that includes water in an amount greater than 70 percent by weight of the composition, inorganic, water-insoluble, light-scattering particles, and a viscosity modifier in an amount effective to maintain the inorganic, water-insoluble, light-scattering particles in suspension in the composition. The composition can be non-fluorescing when exposed to ultraviolet light. In addition, in some applications, the composition is formulated of food safe ingredients, allowing the composition to be used in facilities that process consumable foods and beverages.

Abstract: A method, a device and a computer-readable storage medium containing instructions for setting a head-up display in a transportation vehicle. A setting device is introduced into a defined position in the transportation vehicle. The setting device has at least one camera and one projection unit. The projection unit is used to project an alignment pattern onto a calibration target positioned outside the transportation vehicle. The calibration target and the alignment pattern are acquired using a calibrated camera installed in the transportation vehicle. A deviation of the setting device from the defined position in the transportation vehicle is determined based on the image data of the calibrated camera. At least one test image displayed by the head-up display is acquired using the camera of the setting device. Setting information for the head-up display is determined based on the at least one acquired test image.

Abstract: A tunable diode laser absorption spectroscopy device includes a tunable diode laser. A laser driver is configured to drive the diode laser and ramp it within a particular frequency range. An analyte gas container, a reference gas container, and a fringe generating device are configured to receive the laser therethrough. An optical detector is configured to detect the laser after it has passed through the analyte gas container and/or the reference gas container, and the in-line fringe generating device. An acquisition card is configured to sample an output of the optical detector. A spectral analyzer is configured to receive output data from the acquisition card, determine a spectrum of the output data, decouple the fringe spectrum from the measured spectrum, calibrate the spectrum based on an expected ideal spectrum of both the fringe and reference gas, and determine a composition of the analyte based on the calibrated spectrum.

Abstract: A calibration article is provided for calibrating a robot and 3D camera. The calibration article includes side surfaces that are angled inward toward a top surface. The robot and camera are calibrated by capturing positional data of the calibration article relative to the robot and the camera. The captured data is used to generate correlation data between the robot and the camera. The correlation data is used by the controller to align the robot with the camera during operational use of the robot and camera.

Abstract: A method of configuring a parameter determination process, the method including: obtaining a mathematical model of a structure, the mathematical model configured to predict an optical response when illuminating the structure with a radiation beam and the structure having geometric symmetry at a nominal physical configuration; using, by a hardware computer system, the mathematical model to simulate a perturbation in the physical configuration of the structure of a certain amount to determine a corresponding change of the optical response in each of a plurality of pixels to obtain a plurality of pixel sensitivities; and based on the pixel sensitivities, determining a plurality of weights for combination with measured pixel optical characteristic values of the structure on a substrate to yield a value of a parameter associated with change in the physical configuration, each weight corresponding to a pixel.

Abstract: An image measuring apparatus including an image measurer capable of switching between one of a type of lens and a magnification power, the image measurer obtaining an image of a measured object; a display displaying the image obtained by the image measurer and providing an operation screen to a user; and a controller controlling operations of the image measurer and the display. A calibration value and an expiration date for the calibration value are recorded by the controller for one of each type of lens and each magnification power. The controller communicates to the user, using the display, that one of the lens and the magnification power has an expired calibration value.

Abstract: A method for calibrating a mounting-device used for automatically mounting a contact-part attached to an electrical line with a connector-housing includes the steps of providing the mounting-device, marking a plurality of marking-points, capturing an image of the plurality of marking-points, and determining the positions of the plurality of marking-points. The mounting-device comprises a holder for the connector-housing, a positioning-device that includes a moveable-gripper that includes a marking-device, a camera configured to capture an image of a portion of the holder, and a control unit in communication with the positioning-device, the camera, and the moveable-gripper. The control unit determines the positions of the marking-points based on the image. The positions are indicative of an actual insertion-position of the contact-part into the connector-housing by the moveable-gripper. The control unit stores the positions of the marking-points in a memory of the control unit.

Abstract: A method of calibrating a hyperspectral imaging device includes illuminating a hyperspectral imaging sensor with a light source having known spectral properties, sampling the light from the light source with the hyperspectral imaging sensor to obtain sampled spectral properties, and calibrating a performance characteristic of the hyperspectral imaging sensor based upon comparing the sampled spectral properties of the light source to the known spectral properties.

Abstract: The invention relates to a method for calibrating a spectroradiometer (1), comprising the following method steps: capture of light measurement data by the measurement of the radiation of at least one standard light source (4) using the spectroradiometer (1) that is to be calibrated; derivation of calibrated data from the light measurement data by the comparison of the captured light measurement data with known data of the standard light source (4); and calibration of the spectroradiometer (1) according to the calibration data. The aim of the invention is to provide a reliable and practical method for calibrating the spectroradiometer (1). In particular, the synchronism of spectroradiometers (1) situated in different locations (9, 10, 11) is to be produced simply and reliably. To achieve this aim, the validity, i.e.

Abstract: A method, system and computer program product are provided for identifying wire contact insertion holes of a connector to facilitate the automated insertion of the wire ends of a wire bundle assembly into the wire contact insertion holes of a connector. In the context of a method, each of a plurality of pixels of an image of the connector is analyzed to identify one or more candidate contact insertion holes for the connector. The method also determines whether the one or more candidate contact insertion holes are to be consolidated and, if so, consolidates the one or more candidate contact insertion holes. The method further includes assigning contact identification numbers of the connector to the one or more candidate contact insertion holes.

Abstract: There is provided a method and a device, each of which can improve the reproducibility of the appearance of an actual product. A design layer data creation device 100 includes: a measuring instrument 151 which measures a BRDF of a design layer 210 configured by a paint color layer 202 and a clear coat layer 201; and a calculation element 120 which creates design layer data on the basis of an approximate BRDF according to a BRDF model. The calculation element 120 defines the approximate BRDF by respectively obtaining coupling coefficients Ks1, Ks2, and Kd of a specular reflectance distribution function and a diffuse reflectance distribution function so as to approximate measured BRDF data.

Abstract: A measuring device (1) includes a first signal generation section (3) and a first removal section (5). The first signal generation section (3) generates a first source signal (x1(t)) including a fundamental and a plurality of harmonics based on a first physical quantity (p1) and a second physical quantity (p2). The first removal section (5) removes some or all of the harmonics from the first source signal (x1(t)). The first source signal (x1(t)) is a periodic signal, and one period of the first source signal (x1(t)) includes a first signal (p1), a second signal (p2), and a reference signal (pr). The first signal (p1) has a first duration (w1) and indicates the first physical quantity (p1). The second signal (p2) has a second duration (w2) and indicates the second physical quantity (p2). The reference signal (pr) has a third duration (w3) and indicates the reference physical quantity (pr).

Abstract: A method for calibrating electromagnetic radiation-based three-dimensional imaging includes: obtaining (501) a calibration imaging result at least partly on the basis of electromagnetic waves received from a calibration artifact, forming (502) calibration data on the basis of the calibration imaging result and a known thickness profile of the calibration artifact, and correcting (503), with the aid of the calibration data, an imaging result obtained at least partly on the basis of electromagnetic waves received from a sample to be imaged. The calibration artifact includes layers, for example Langmuir-Blodgett films, having pre-determined thicknesses and stacked on each other so as to achieve the pre-determined thickness profile of the calibration artifact. A three-dimensional imaging system configured to carry out the method.

Abstract: Reflective or embossed regions are supposed to be illuminated as uniformly as possible over the greatest possible angle range for optical inspection using in one aspect an apparatus for inspection having a passive lighting body spotlighted by a spotlight light source, which body illuminates a test region, as well as at least one optical sensor directed at the test region. The lighting body is configured to be partially transmissible, and the optical sensor is disposed, with reference to the test region, optically beyond the lighting body, detecting the test region through the lighting body, and/or the spotlight light source is directed at the lighting body and the lighting body extends continuously over at least 120° in a section plane that stands perpendicular to the surface of the flat items to be tested or inspected.

Abstract: The disclosed automatic calibration systems and methods provide a repeatable way to detect internal catheter reflections and to shift the internal catheter reflections to calibrate an image.

Abstract: An optical sample characterization method is disclosed comprising: holding a sample in a sample container proximate at least one two-dimensional detector array assembly, wherein the sample container has a first end and a second end; setting up a gradient between the first end of the sample container and the second end of the sample container; illuminating the sample between the first end of the sample container and the second end of the sample container; and detecting light received from the illuminated sample from the first end of the sample container to the second end of the sample container by the two-dimensional array assembly.

Abstract: A method and a device allow optical properties of a sample to be estimated. The method includes the illumination of the sample by a first light source, and the formation of an image of the sample thus illuminated, on the basis of which a first optical property is estimated, at various points on a surface of the sample. The method also includes measuring an auxiliary optical property of the sample and estimating the first optical property, taking account of the auxiliary optical property measured on the sample.

Abstract: The present invention includes an interface apparatus for semiconductor testing. The interface apparatus comprises a housing substrate and two product substrates. The first product substrate has a first micro-scale conductive pattern and is situated within a first opening of the housing substrate. The second product substrate has a second micro-scale conductive pattern and is situated within a second opening of the housing substrate. The first and the second micro-scale conductive patterns are aligned to a conductive semiconductor wafer pattern using a continuous translucent media having targets corresponding to the conductive semiconductor wafer pattern.

Abstract: An organic light emitting diode (OLED) display device and a preparation method thereof, and a display apparatus are disclosed. The OLED display device includes: a thin layer transistor (22), a first electrode (23?), a second electrode (26?) and an organic functional layer (25) located between the first electrode (23?) and the second electrode (26?). The thin film transistor (22) comprises a gate electrode (221), a source electrode (222) and a drain electrode (223); and the first electrode (23?) is electrically connected with the drain electrode (223). The display device further comprises a first auxiliary electrode (27) formed from a topological insulator. The first auxiliary electrode (27) is electrically connected with the second electrode (26?) to provide electrical signals for the second electrode (26?). The OLED display avoids the problems of high IR drop and non-uniform lightness caused by the large transmission resistance of the cathodes.