What is disclosed are systems and methods of compensation of images produced by active matrix light emitting diode device (AMOLED) and other emissive displays. The electrical output of a pixel is compared with a reference value to adjust an input for the pixel. In some embodiments an integrator is used to integrate a pixel current and a reference current using controlled integration times to generate values for comparison.

An electroluminescent display apparatus including a pixel connected to a detection line; a panel driving circuit configured to off-drive a driving element included in the pixel in a detection interval; a reference voltage generating circuit configured to supply a detection reference voltage to the detection line prior to the detection interval, generate a first comparator reference voltage which is higher than the detection reference voltage in the detection interval, and generate a second comparator reference voltage which is lower than the detection reference voltage in the detection interval; a comparator configured to compare the first comparator reference voltage with a voltage of the detection line to generate a first comparison output at a first timing of the detection interval and comparing the second comparator reference voltage with the voltage of the detection line to generate a second comparison output at a second timing of the detection interval; and a logic circuit configured to determine an occurrence of a defect of the pixel based on the first comparison output and the second comparison output and to perform dark spot processing of the defective pixel.

A display device includes a lighting device, a display panel, a memory, and a correction circuit. The lighting device includes a light exit area defined into light exit sections corresponding to light sources. The display panel includes a display area opposed to the light exit area and including pixels. The display area includes display sections to be opposed to the light exit sections. The memory stores data of pixel matrix linked to the display sections. The memory stores position data of the pixels that are not opposed to the corresponding light exit sections and deviation data when a position error is caused between the light exit area and the display area. The correction circuit is configured to determine whether the memory stores the position data of the pixels and link new pixel matrix units to the corresponding display sections based on the deviation data if determination result is affirmative.

A display device, a compensation system, and a compensation data compression method. The display device includes a display panel including a plurality of subpixels, a compensation module generating compensation data regarding subpixels disposed in a normal area, a fixed pattern area, and a bad pixel area, and a compression module generating compressed compensation data by compressing the compensation data. The compressed compensation data includes compressed compensation data regarding the normal area, compressed compensation data regarding the fixed pattern area, and compressed compensation data regarding the bad pixel area. The compressed compensation data regarding the normal area includes normal compensation data processed by encoding, the compressed compensation data regarding the fixed pattern area include fixed compensation data processed by the encoding and error information resulting from the encoding, and the compressed compensation data regarding the bad pixel area includes a flag regarding the bad pixel area.

A display apparatus includes a display panel in which a plurality of pixels and a plurality of data lines and a plurality of sensing lines connected to the pixels are arranged, a first driving circuit connected to data lines and sensing lines arranged in a first pixel column and a second pixel column adjacent to the first pixel column, and a second driving circuit connected to data lines and sensing lines arranged in a third pixel column adjacent to the second pixel column and a fourth pixel column adjacent to the third pixel column.

Provided is a display device. The display device includes a display panel that includes a first display region and a second display region, a data driving circuit configured to drive a plurality of data lines, a scan driving circuit configured to drive a plurality of scan lines, and a driving controller configured to control the data driving circuit and the scan driving circuit so as to operate the first display region and the second display region at different frequencies when an operation mode is a multi-frequency mode, wherein the driving controller changes the operation mode to a normal mode when a difference between an image signal of a current frame of the first display region and an image signal of a previous frame of the first display region is equal to or greater than a reference value during the multi-frequency mode.

A method for inspecting a display device (which includes a pixel electrode and a touch sensor overlapping the pixel electrode) includes: adjusting an impedance value of a variable impedance circuit of an inspection apparatus according to a model of the display device; driving a power source generator of the inspection apparatus; supplying a pixel voltage to the pixel electrode through an output terminal connected to the variable impedance circuit; driving the touch sensor; and detecting a defect related to the pixel electrode based on sensing signals output from the touch sensor.

A light emitting display apparatus, which turns on a first transistor included in a pixel driving unit and connected to a data line during a data period where a data voltage is supplied from a data driver to the data line, is provided. The light emitting display apparatus includes a light emitting display panel including a pixel including a first transistor connected to a gate line and a data line, a gate driver supplying a gate signal to the first transistor, a data driver supplying a data voltage to the data line, and a switching driver connecting the data line to the data driver or connecting a sensing line to the data driver, wherein the gate driver turns on and then turns off the first transistor during a data period where a data voltage is supplied from the data driver to the data line through the switching driver.

A display device and an operating method of the display device are provided. The display device includes a first light emitting diode (LED), a first switch, a second switch, a second LED, a third switch, and a first controller. A first terminal of the first switch receives a first electrical signal. A first terminal of the second switch receives a second electrical signal. A first terminal of the third switch receives a third electrical signal. Here, whether the first switch, the second switch, and the third switch are switched on or off is determined by whether the first LED and the second LED are damaged or not. The first controller is configured to detect whether the first LED and the second LED are damaged or not, generate the second electrical signal and the electrical signal, and generate a plurality of control signals controlling the first switch to the third switch.

An electronic device and a control method therefor are provided. The electronic device comprises: a communication unit; and a processor configured to receive, from at least one cabinet of a plurality of cabinets, position information on a defective pixel detected in each cabinet through the communication unit, identify a position, on an entire screen consisting of the plurality of cabinets, where the defective pixel is present on the basis of the position information of the defective pixel, identify a defective area on the entire screen on the basis of the identified position, and provide information on the identified defective area. Here, each of the plurality of cabinets includes a plurality of display modules, wherein each of the plurality of display modules includes a plurality of pixels each consisting of a plurality of LEDs.