A method and apparatus for detecting a display screen are provided. The apparatus comprises: a detection module for detecting components of a primary color in the light at a display side when a first and second display signal are input to the display screen, wherein the first and second display signal are used for displaying a monochromatic image in black and a monochromatic image in a color other than black; and a data processing unit for calculating a difference between components of the primary color which are detected when the first and second display signal are input, and determining whether there is a fault in the display screen according to the difference. The effect of ambient light on detection results can be reduced, and the detection results are more close to the actual case.

A photometric device (1) measuring light emitted from a measuring object such as a display (2) includes two types of filters including interference filters (20X, 20Y, and 20Z) and an LVF (21), a disk (22) supporting the interference filters and the LVF, a motor (23) rotatably drive the disk to cause the light emitted from the measuring object to scan the interference filters and the LVF sequentially, a photoreceptor (13) converting light passed through the interference filters and light passed through the LVF to an electrical signal, a photometric controller (14) outputting photometric information based on the electrical signal of the light passed through the interference filters and converted by the photoreceptor and the electrical signal of the light passed through the LVF and converted by the photoreceptor.

A photometric device (1) measuring light emitted from a measuring object such as a display (2) includes interference filters (20X, 20Y, and 20Z) selectively transmitting a particular wavelength corresponding to a respective one of tristimulus values, an LVF (21) separating and transmitting incident light, a disk (22) supporting the interference filters and the LVF, a motor (23) rotatably drive the disk to cause the light emitted from the measuring object to scan the interference filters and the LVF sequentially, a photoreceptor (13) converting light passed through the interference filters and light passed through the LVF to an electrical signal, and a photometric controller (14) outputting photometric information based on the electrical signal of the light passed through the interference filters and converted by the photoreceptor and the electrical signal of the light passed through the LVF and converted by the photoreceptor.

The present invention provides an LED backlight color temperature adjustment circuit, including a driving chip, an LED backlight module and a control module. The driving chip includes: a driving unit, employed to drive a display panel to show an image; an image data extraction unit, extracting a present display image data of the display panel; an image data analysis unit, employed to calculate a deviation value of the color temperature of the present display image data and a standard color temperature; and a color temperature adjustment unit, employed to generate and output a color temperature adjustment according to the deviation value of the color temperature of the present display image data and the standard color temperature. The LED backlight module includes a plurality of first LEDs which are identical and coupled in series and a plurality of first LEDs which are identical and coupled in series.

A wavelength estimation device including a light detector to receive light emitted from a light source and an estimation unit. The estimation unit estimates a wavelength of the light based on an amount of light received by the light detector.

A calibration device for calibrating output of a display device includes a light source, an integrating sphere, a filter, a narrowband instrument, a wideband instrument, and a data processing unit. The light rays emitted by the light source passing through the filter and enter the integrating sphere. The narrowband instrument and the wideband instrument are configured to measure the color measured data. The data processing unit is configured to receive the color measured data to generate a calibration matrix based on the color measured. The calibration matrix is used to calibrate the output from the wideband instrument.

Systems, devices, and methods illuminate one or more areas on a calibration medium from a first side of the calibration medium with one or more respective light-emitting regions of a light source; detect light transmitted through the calibration medium at the one or more areas, thereby obtaining calibration-measurement information for at least one of the one or more light-emitting regions; illuminate one or more color patches on a color-measurement medium from a first side of the color-measurement medium with the one or more respective light-emitting regions of the light source; detect light transmitted through the one or more color patches printed on the color-measurement medium, thereby obtaining color-measurement information for at least one of the one or more light-emitting regions; and generate one or more transmissive measurements based on the calibration-measurement information and the color-measurement information.

An electronic apparatus is provided. The electronic apparatus includes a substrate including a plurality of electrodes in contact with at least part of electrodes of a plurality of micro LEDs disposed on a transparent substrate at a first pitch to apply a current to micro LEDs of the plurality of micro LEDs disposed at a second pitch, a camera disposed opposite to the substrate based on the transparent substrate, and a processor configured to apply a current to the plurality of electrodes on the substrate, control the camera to capture an image of the plurality of LEDs including a light emitting micro LED according to current applying, obtain characteristic information of the light emitting micro LED based on the captured image, and determine a target substrate on which each of the plurality of micro LEDs is disposed based on the obtained characteristic information.

A color measuring device includes a color difference meter module. The color difference meter module includes: a main detecting unit having an optical detecting unit configured to receive light introduced from an incident lens to generate a first current depending on a color, a first measuring unit configured to measure the first current, a sub-detecting unit having a dark detecting unit disposed adjacent to the main detecting unit and blocking the light to generate a second current in a dark state, a second measuring unit configured to measure the second current, a leakage measuring unit including a charging unit provided in the second measuring unit and charged with a predetermined set current, and measures a third current leaking from the charging unit, and a control unit that corrects the first current by reflecting the second current and the third current.

The present disclosure describes a method and apparatus that can be used to determine various characteristics of ambient light when an ambient light sensor is located behind a display screen. The strategy of the disclosure relies, at least in part, on spectral decomposition of ambient light measurements into components (e.g., red, green, and blue components of an Organic Light Emitting Diode (“OLED”) display screen and ambient light). Following the spectral decomposition technique, statistical analysis are performed on the measurement data to remove the OLED light components from the measurement. This technique enables determinations such as ambient lux and correlated color temperature independent of the content displayed on the screen.