A display device with a switchable viewing angle includes a timing controller to generate an image data, a data control signal, and a gate control signal, a data driver to generate a data signal using the image data and the data control signal, a gate driver to generate a gate signal and first to third emission signals using the gate control signal, and a display panel including a plurality of subpixels to display an image using the data signal, the gate signal, and the first to third emission signals. The gate driver includes a gate signal generator to generate the gate signal, first emission signal generator to generate the first emission signal, and second and third emission signal generators to generate the second and third emission signals, respectively, using input and output signals of the gate signal generator and input and output signals of the first emission signal generator.

A display device includes: a first pixel including a first light emitting diode (LED) and a first capacitor including a first electrode connected to a first power source voltage providing a driving voltage to an anode of the first light emitting diode (LED) or to an initialization voltage, and a second electrode connected to the anode of the first light emitting diode (LED); and a second pixel including a second light emitting diode (LED) and a second capacitor including a first electrode connected to the first power source voltage providing the driving voltage to an anode of the second light emitting diode (LED) or to an initialization voltage, and a second electrode connected to the anode of the second light emitting diode (LED), wherein capacitance of the second capacitor is less than capacitance of the first capacitor.

A display device includes: pixels, each of the pixels including at least one light emitting element and a first transistor configured to supply a driving current to the at least one light emitting element; a sensing unit configured to sense a driving current of the first transistor, which corresponds to a data voltage applied to one pixel from among the pixels, the sensing unit being configured to detect a luminance of the light emitting element, which corresponds to the driving current; a gamma calculator configured to receive the driving current and the luminance of the light emitting element from the sensing unit, to calculate a gamma changed based on the driving current and the luminance of the light emitting element, and to provide, to a memory, the gamma changed based on the driving current and the luminance of the light emitting element.

Disclosed is a display device, which includes a display panel including a plurality of pixels, and one of the plurality of pixels includes a light emitting device connected to a first reference node and that emits light, a driving transistor connected between a power supply line receiving a power supply voltage and the first reference node, a scan transistor connected between a data line receiving a data signal and the driving transistor and that receives a scan signal, a first capacitor connected between the first reference node and a second reference node, a shared transistor connected between the first reference node and the second reference node and that receives a shared control signal, and the first capacitor and the shared transistor are connected in series between the first reference node and the second reference node, and a control electrode of the driving transistor is connected to the second reference node.

A display device can include a timing controller; a level shifter including a signal input circuit to receive a first clock signal and a second clock signal, a driving mode conversion circuit to self-generate one or more mode signals based on the first and second clock signals for adjusting a driving mode, and a signal output circuit to generate a plurality of scan clock signals based on the one or more mode signals, the first and second clock signals; a shift register configured to generate a scan signal based on the plurality of scan clock signals; and a display panel configured to display an image based on the scan signal. Also, the level shifter is configured to in response to a width of a pulse of the first clock signal being greater than a threshold value, sequentially output a pulse for each of the plurality of scan clock signals.

A luminance difference correction method and a light emitting display apparatus using the same is discussed. The luminance difference correction method can include receiving by an camera an image, which is output from a camera region of a light emitting display panel and is reflected by at least one of a reflector or a cover glass associated with the apparatus. The method can further include analyzing by a controller the image received by the camera, and varying a level of at least one of (i) a gamma voltage used to generate a data voltage to be output to data lines included in the light emitting display panel, and (ii) one or more of driving voltages supplied to pixels included in the light emitting display panel.

A display apparatus includes a display panel and a display panel driver. The display panel includes a first display area having a first pixel structure and a second display area having a second pixel structure different from the first pixel structure. The display panel driver drives the display panel in a first mode when an image complexity of input image data corresponding to a determination area which includes the first display area is greater than a threshold value and to drive the display panel in a second mode different from the first mode when the image complexity of the input image data is less than or equal to the threshold value.

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 is disclosed that includes: a display panel on which a plurality of pixels are disposed; a data driver configured to receive a sensing voltage from a reference voltage line connected to the plurality of pixels, convert the reference voltage into sensing data, and supply the data voltage to the plurality of pixels; a gate driver configured to supply a scan signal to the plurality of pixels; and a timing controller configured to output a data control signal for controlling an output timing of the data voltage and output a gate control signal for controlling an output timing of the scan signal, wherein one of the output timing of the data voltage and the output timing of the scan signal is adjusted based on the sensing data.

What is disclosed are systems and methods for compensating for display OLED degradation. Correction factors k for OLED degradation of each sub-pixel is modelled and tracked based on grey level, temperature, and time, and used to correct image data provided to an OLED display.