Methods are provided for detecting correct or incorrect operation of a display panel (e.g. LED or OLED) during display of a video signal, the display panel being associable with a controller system. The method comprises: adding, by the controller system, a dynamic pattern into the video signal for inducing the display panel to display the video signal with the added dynamic pattern substantially imperceptible to human vision, and to provoke an expected power consumption evolution during the display of the video signal with the added dynamic pattern; measuring, by the controller system, power consumed by the display panel during the display of the video signal with the added dynamic pattern to determine an actual power consumption evolution; and determining, by the controller system, whether the actual power consumption evolution corresponds to the expected power consumption evolution. Controller systems and computer programs suitable for performing such detection methods are also provided.

An apparatus that automatically monitors a display device includes a photo sensor configured to receive light from a display screen of the display device. The photo sensor provides signals representing detected light levels to a processor. The processor is coupled to the display device and is configured to cause the display device to present a test sequence including a plurality of images on the display screen. The processor is configured to capture data from the photo sensor during the presentation of the test sequence and to compare the captured data to an expected sequence corresponding to the test sequence displayed by a well-functioning display. The processor is further configured to report any mismatch between the captured data and the expected sequence as a possible malfunction of the display device.

A video signal output device includes a redundant circuit and a first video signal output circuit. The redundant circuit includes a redundant input switcher configured to input a first input signal and to thereby generate a first video signal according to the first input signal. The first video signal output circuit includes a first input signal switcher configured to input the first input signal and a second input signal and to thereby generate either the first video signal or a second video signal according to the second input signal, and a first video signal switcher configured to input the first video signal from the redundant input switcher while inputting the first video signal or the second video signal from the first input signal switcher and to thereby output the first video signal generated by the redundant input switcher or the first input signal switcher.

A testing method and a testing apparatus for splicing screens (1, 2, 3, 4) are provided. The method includes: outputting an image signal to a display screen, wherein the display screen includes a plurality of splicing screens (1, 2, 3, 4), the image signal includes a plurality of testing sub pictures, the testing sub pictures are arranged correspondingly to the splicing screens (1, 2, 3, 4) so as to enable the splicing screens (1, 2, 3, 4) to display the corresponding testing sub pictures, and the testing sub pictures include testing contents (5, 6, 7, 8, 9, 10, 11, 12); and testing the splicing screens (1, 2, 3, 4) through the testing contents (5, 6, 7, 8, 9, 10, 11, 12). Testing on the splicing screens (1, 2, 3, 4) is achieved, and a testing result can be used for regulating the splicing screens (1, 2, 3, 4), so that defects generated in the displaying process of the splicing screens (1, 2, 3, 4) are reduced.

This disclosure describes techniques for capturing radio frequency (RF) signal over the air, processing spectrum power data, and uploading data to a central data repository for analysis and reporting. Captured RF signals are filtered and amplified via a front-end module of a probe that includes a filter and a low noise amplifier (LNA). Output signals can be decoded into digital TV metadata and image captures via a TV tuner and spectrum power, and then analyzed via a software defined radio (SDR). Digital TV metadata and images, as well as SDR data, can be uploaded and collected at a server. The server processes collected spectrum data from SDR into spectrum reports. The server can also analyze collected digital TV metadata to identify with increased accuracy RF sources originating from transmitting TV facilities.

A method for calibrating a projection system having a plurality of projectors, and a camera. The method comprises the camera capturing an image of a calibration pattern projected on to a projection surface by a first projector of the plurality of projectors; determining a projective reconstruction using corresponding points between pixels in the captured image and pixels in the projected calibration pattern; and determining a set of solutions for intrinsic parameters of the first projector, the set of solutions converting the projective reconstruction to a Euclidean reconstruction based on minimisation of reprojection error between the camera and the first projector. The method also comprises determining intrinsic parameters of the first projector by selecting the intrinsic parameters from the set of solutions according to a reprojection error with respect to another projector; and applying the selected intrinsic parameters to determine a Euclidean reconstruction of the projection surface.

A device can receive an indication to perform a test of a capability of the device to receive data. The data can have a threshold data rate. The device can perform an action to cause the device to receive the data from a source of the data at the threshold data rate. The device can monitor a set of metrics related to the data or a performance of the device. The device can perform an analysis of the set of metrics after monitoring the set of metrics. The device can identify a source of an error based on a result of performing the analysis of the set of metrics. The source of the error can be related to the data or the performance of the device. The device can perform another action related to fixing the source of the error.

A method for testing energy efficiency of a display device having automatic brightness control (ABC) and local dimming functions includes the following steps: S1: executing an estimation program to obtain an estimation value of on-mode average power consumption of the display device; S2: when the estimation value is greater than or equal to a threshold value, adjusting a turn-on preset brightness value, first brightness adjustment ratios, and/or second brightness adjustment ratios to cause the estimation value to be less than the threshold value; and, S3: when the estimation value is less than the threshold value, actually measuring the display device to obtain a measurement value of the on-mode average power consumption of the display device.

A system and method for image testing is configured to apply at least one display property to a test image to generate a display modified test image and applying the at least one display property to a reference image to generate a display modified reference image. The system also applies a human eye model to the display modified test image to generate an eye modified test image and applies the human eye model to the display modified reference image to generate an eye modified reference image. The system may compare the eye modified test image with the eye modified reference image to determine human perceivable differences between the test image and the reference image.

A device can receive an indication to perform a test of a capability of the device to receive data. The data can have a threshold data rate. The device can perform an action to cause the device to receive the data from a source of the data at the threshold data rate. The device can monitor a set of metrics related to the data or a performance of the device. The device can perform an analysis of the set of metrics after monitoring the set of metrics. The device can identify a source of an error based on a result of performing the analysis of the set of metrics. The source of the error can be related to the data or the performance of the device. The device can perform another action related to fixing the source of the error.