A light emitting display device can include a display panel configured to display an image; a driver configured to drive the display panel; a controller configured to control the driver; and a defect sensing circuit configured to sense a current through a driving voltage line transmitting a driving voltage for driving of the display panel, and output a sensing value based on the current for determining whether an element in a subpixel of the display panel is defective.

A light emitting display device includes a display panel including subpixels connected to a reference line, and a data driver connected to data lines of the display panel. The data driver simultaneously acquires degradation information values as to the subpixels through the data lines after driving transistors included in the subpixels perform a source-following operation by a reference voltage transmitted through the reference line and a data voltage for sensing transmitted through the data lines.

A light emitting display device and a compensation method thereof, wherein an optical characteristics detection portion overlapping a signal line is provided in a subpixel, and the optical characteristics detection portion is connected to one of source voltage lines used by the subpixel, whereby optical characteristics of the subpixel can be determined without loss in effective area of an emission portion and to easily compensate for an afterimage of a display panel.

A display device includes a display panel and the display panel includes a pixel. The pixel includes a light emitting unit including at least one light emitting element, a driving transistor providing a driving current corresponding to a data signal to the light emitting unit, and a first transistor electrically connected between both ends of the light emitting unit. A driver provides the data signal to the pixel and provides a duty control signal to the first transistor. The driver varies a voltage level of the data signal in a first grayscale section in which a grayscale corresponding to the data signal is greater than or equal to a reference grayscale, and varies a duty ratio of the duty control signal in a second grayscale section in which the grayscale is less than the reference grayscale.

A display device includes a display panel, a driving controller, and a readout circuit. The display panel includes a first part and a second part. The first part includes a first pixel set. The second part includes a first sensor set. The driving controller controls the first pixel set to emit first light when controlling the first sensor set to receive second light. The first sensor set generates a sensing signal using the second light. The readout circuit is electrically connected to at least one of the driving controller and the first sensor set and receives the sensing signal. The display device calculates a dust concentration using the sensing signal.

A processor-based device with a display unit, such as a smart phone, identifies pixels associated with a camera under the display screen. The device also identifies a condition in which the pixels associated with the camera under the display screen can be dimmed or turned off. The device then dims or turns off the pixels associated with the camera under display based on the condition.

To provide a display device capable of displaying a plurality of images by superimposition using a plurality of memory circuits provided in a pixel. A plurality of memory circuits are provided in a pixel, and signals corresponding to images for superimposition are retained in each of the plurality of memory circuits. In the pixel, the signals corresponding to the images for superimposition are added to each of the plurality of memory circuits. The signals are added to the signals retained in the memory circuits by capacitive coupling. A display element can display an image corresponding to a signal in which a signal written to a pixel through a wiring is added to the signals retained in the plurality of memory circuits. Reduction in the amount of arithmetic processing for displaying images by superimposition can be achieved.

A sensing circuit includes a first input selecting circuit connected to a first sensing line and a second sensing line, a first path setting circuit that sets a path of a first sensing signal received from the first sensing line or a path of a second sensing signal received from the second sensing line, a second path setting circuit that sets a path of a sensing reference voltage, a first switch matrix connected to the first path setting circuit and the second path setting circuit, a first mode setting circuit connected to a first output terminal of the first switch matrix, a first common sensing amplifier connected to the first mode setting circuit, a second mode setting circuit connected to a second output terminal of the first switch matrix, and a second common sensing amplifier connected to the second mode setting circuit.

A display device may include a display unit, a signal controller, and a sensing unit. The display unit may include pixels. The signal controller may select a first pixel set from the pixel according to ages of the pixels determined based on an image signal. The sensing unit may be electrically connected to each of the display unit and the signal controller and may sense deterioration information of one or more pixels included in the first pixel set for a vertical blank period in which the display unit displays no image.

A display device with sensing element includes a substrate having a disposing surface, a plurality of display elements, at least one sensing element, and at least one lighting adjustment element. The display elements are disposed above the disposing surface to present an image. The at least one sensing element disposed above the disposing surface to sense a light brightness projected toward either side of the substrate. The at least one light adjustment element is in signal transmittable connection with the display elements and the at least one sensing element. The at least one light adjustment element adjusts a plurality of control signals inputted into the display elements to determine a contrast of the image.