Abstract: A method for calibrating an ultrasonic sensor includes: transmitting a first ultrasonic signal from the ultrasonic sensor toward a first surface of a contact device when a model is on the first surface of the contact device; generating ultrasonic images by sampling a first ultrasonic echo signal, the first ultrasonic echo signal comprising a reflected signal of the first ultrasonic signal, at a plurality of reception time points; detecting portions of the ultrasonic images, wherein detected portions of the ultrasonic images are most similar to corresponding portions of a reference image of the model compared to other portions of the ultrasonic images having same positions as the detected portions and detected at different reception time points of the plurality of reception time points than the detected portions; and storing the reception time points corresponding to the detected portions of the ultrasonic images.

Abstract: Provided is a fingerprint authentication device comprising a biometric sensor that senses biometric information to generate a sensing signal; an image processor that extracts a calibration function based on calibration data and generates a fingerprint image based on the calibration function and the sensing signal; and an authenticator that performs fingerprint authentication by comparing the fingerprint image and registered fingerprint information. The calibration data includes information on a calibration coefficient of the calibration function.

Abstract: A sound inspection method of a display device and a sound inspection device including preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel, placing a vibration sensor on a second surface opposite to the first surface of the display panel, vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel; and determining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region.

Abstract: A display device having an optical sensor includes a display panel including display pixels; and a sensor controller; and sensor pixels, wherein the sensor pixels include an optical sensor located on a first area of the display panel, the display pixels display a pattern including a plurality of markers in the first area, the sensor pixels image the pattern to generate a first image, the sensor controller divides the first image into sub-images corresponding to the markers, the sensor controller calculates first representative coordinates obtained by adding an integer part and a decimal part with respect to the sub-images, a unit of the integer part is the number of the sensor pixels, and each of the integer part and the decimal part independently includes a first dimensional value for a first direction and a second dimensional value for a second direction orthogonal to the first direction.

Abstract: Provided herein are a calibration method for a fingerprint sensor and a display device using the calibration method, where, in the calibration method for a fingerprint sensor, the fingerprint sensor includes a substrate, a light-blocking layer located on a first surface of the substrate and having openings formed in a light-blocking mask, a light-emitting element layer located on the light-blocking layer and having a plurality of light-emitting elements, and a sensor layer located on a second surface of the substrate and having a plurality of photosensors; and the calibration method includes generating calibration data through white calibration and dark calibration, and applying offsets to the plurality of photosensors using the calibration data.

Abstract: A touch testing apparatus includes: a pogo pad area including input and output test pogo pads respectively connected to input and output test pads disposed in a pad area of a touch detection module; a test touch driver circuit configured to detect compression deviations between the input test pad and the input test pogo pad and between the output test pad and the output test pogo pad, and to correct touch data of the touch detection module based on the detected compression deviations; and a test board on which the test touch driver circuit is mounted, wherein the test board is configured to electrically connect the test touch driver circuit with the input and output test pogo pads.

Abstract: An input sensing device includes a display panel, a sensor pixel, and a fingerprint detector. The display panel displays a fingerprint detection pattern corresponding to a target object. The sensor pixel generates a sensing signal by detecting light reflected from the fingerprint detection pattern by the target object. The fingerprint detector detects a fingerprint for the target object based on the sensing signal, and changes an exposure time of the sensor pixel based on a size of the fingerprint detection pattern.

Abstract: A display device includes a sensor on a display panel, an optical filter, and a fingerprint detector. The sensor includes a first area and a second area and is configured to sense light transmitted through the display panel. The optical filter is between the display panel and sensor, and overlaps with the first area but not the second area. The optical filter blocks light corresponding to a first wavelength range in a wavelength range of the light. The fingerprint detector determine whether a fingerprint is a fake fingerprint or a pre-registered fingerprint based on a first sensing signal and a second sensing signal. The first sensing signal correspond to an area in contact with a finger in the second area, and the second sensing signal corresponds to an area not in contact with the finger among sensing signals from the sensor.

Abstract: Provided herein are a calibration method for a fingerprint sensor and a display device using the calibration method, where, in the calibration method for a fingerprint sensor, the fingerprint sensor includes a substrate, a light-blocking layer located on a first surface of the substrate and having openings formed in a light-blocking mask, a light-emitting element layer located on the light-blocking layer and having a plurality of light-emitting elements, and a sensor layer located on a second surface of the substrate and having a plurality of photosensors; and the calibration method includes generating calibration data through white calibration and dark calibration, and applying offsets to the plurality of photosensors using the calibration data.

Abstract: An input sensing device includes a display panel, a sensor pixel, and a fingerprint detector. The display panel displays a fingerprint detection pattern corresponding to a target object. The sensor pixel generates a sensing signal by detecting light reflected from the fingerprint detection pattern by the target object. The fingerprint detector detects a fingerprint for the target object based on the sensing signal, and changes an exposure time of the sensor pixel based on a size of the fingerprint detection pattern.

Abstract: Provided herein are a calibration method for a fingerprint sensor and a display device using the calibration method, where, in the calibration method for a fingerprint sensor, the fingerprint sensor includes a substrate, a light-blocking layer located on a first surface of the substrate and having openings formed in a light-blocking mask, a light-emitting element layer located on the light-blocking layer and having a plurality of light-emitting elements, and a sensor layer located on a second surface of the substrate and having a plurality of photosensors; and the calibration method includes generating calibration data through white calibration and dark calibration, and applying offsets to the plurality of photosensors using the calibration data.

Abstract: A display apparatus includes: a display panel configured to display an image; a fingerprint sensor disposed on the display panel and configured to capture a fingerprint image and to generate fingerprint sensing data; and a fingerprint sensor controller configured to generate a compensation characteristic function of each pixel of the fingerprint sensor using a plurality of test patterns, to extract a coefficient of the compensation characteristic function of each pixel and to compensate the fingerprint sensing data using the coefficient of the compensation characteristic function.

Abstract: A display device includes a panel unit including a display unit, a first circuit board connected to the display unit, and a first connecting member connected to the first circuit board, an input unit including a connection member configured to attach to the first connecting member, and to provide an image signal to the panel unit, a master configured to output a transmitting signal for diagnosing an electrical connection between the first connecting member and the connection member, a transmitting line connected to the master, an inspecting line configured to connect to the transmitting line through the connection member, and a slave configured to connect to the master through the inspecting line, to receive the transmitting signal as a receiving signal, and to enable determination of on-time duty and off-time duty of the receiving signal to determine whether a connection error between the panel unit and the input unit exists.

Abstract: A display device having an optical sensor includes a display panel including display pixels; and a sensor controller; and sensor pixels, wherein the sensor pixels include an optical sensor located on a first area of the display panel, the display pixels display a pattern including a plurality of markers in the first area, the sensor pixels image the pattern to generate a first image, the sensor controller divides the first image into sub-images corresponding to the markers, the sensor controller calculates first representative coordinates obtained by adding an integer part and a decimal part with respect to the sub-images, a unit of the integer part is the number of the sensor pixels, and each of the integer part and the decimal part independently includes a first dimensional value for a first direction and a second dimensional value for a second direction orthogonal to the first direction.

Abstract: A display device includes: a display portion that includes a plurality of pixels, and displays an image through light emitted from the plurality of pixels; a sensor that includes a plurality of light sensing pixels that receive light and acquires a first image when the display portion displays a test image that includes a marker; a memory that stores calibration image data for calibrating an image acquired by the sensor; and a sensor controller that calculates a movement amount of a marker in the first image and corrects or updates the calibration image data using the movement amount of the at least one marker.

Abstract: Provided herein are a calibration method for a fingerprint sensor and a display device using the calibration method, where, in the calibration method for a fingerprint sensor, the fingerprint sensor includes a substrate, a light-blocking layer located on a first surface of the substrate and having openings formed in a light-blocking mask, a light-emitting element layer located on the light-blocking layer and having a plurality of light-emitting elements, and a sensor layer located on a second surface of the substrate and having a plurality of photosensors; and the calibration method includes generating calibration data through white calibration and dark calibration, and applying offsets to the plurality of photosensors using the calibration data.

Abstract: A display apparatus includes: a display panel configured to display an image; a fingerprint sensor disposed on the display panel and configured to capture a fingerprint image and to generate fingerprint sensing data; and a fingerprint sensor controller configured to generate a compensation characteristic function of each pixel of the fingerprint sensor using a plurality of test patterns, to extract a coefficient of the compensation characteristic function of each pixel and to compensate the fingerprint sensing data using the coefficient of the compensation characteristic function.

Abstract: A sound inspection method of a display device and a sound inspection device including preparing a display device including a display panel and a sound generator disposed on a first surface of the display panel, placing a vibration sensor on a second surface opposite to the first surface of the display panel, vibrating the sound generator at a first reference frequency, vibrating the display panel, and then sensing a vibration of the vibration sensor that vibrates along with a vibration of the display panel; and determining whether a frequency of the vibration of the vibration sensor is included in a first threshold frequency region.

Abstract: The present application relates to a polycyclic compound including nitrogen and an organic light emitting device including the same.

Abstract: A display device includes: a display portion that includes a plurality of pixels, and displays an image through light emitted from the plurality of pixels; a sensor that includes a plurality of light sensing pixels that receive light and acquires a first image when the display portion displays a test image that includes a marker; a memory that stores calibration image data for calibrating an image acquired by the sensor; and a sensor controller that calculates a movement amount of a marker in the first image and corrects or updates the calibration image data using the movement amount of the at least one marker.