A display device compensates a threshold voltage Vth of a driving transistor according to a source follower internal compensation method. The threshold voltage Vth of the driving transistor is sampled in advance before one horizontal period H, so that a sufficient time for sampling the threshold voltage Vth of the driving transistor can be obtained even in a high-speed or high-resolution display device. Furthermore, the compensation rate of the internal compensation circuit is improved to reduce luminance deviation between the pixels.

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.

The present disclosure provides a display apparatus, a pixel circuit and a method of driving a pixel circuit. In one or more embodiments, the pixel circuit includes a driving transistor, a data signal module and a bias signal module. A first electrode of the driving transistor is connected with a first power signal terminal, a second electrode of the driving transistor is connected with a first terminal of a light emitting element, and the driving transistor includes a first control electrode and a second control electrode. The data signal module is connected with the driving transistor, a data writing signal terminal and a data signal terminal. The bias signal module is connected with the driving transistor, a bias writing signal terminal and a bias signal terminal, and is configured to adjust a threshold voltage of the driving transistor under control of the bias writing signal terminal and the bias signal terminal.

A pixel circuit, display device, and method of driving a pixel circuit enabling source-follower output with no deterioration of luminance even with a change of the current-voltage characteristic of the light emitting element along with elapse, enabling a source-follower circuit of n-channel transistors, and able to use an n-channel transistor as an EL drive transistor while using current anode-cathode electrodes. The circuit includes a source of a TFT used as a drive transistor that is connected to an anode of a light emitting element, and a drain of the TFT is connected to a power source potential. A capacitor is connected between a gate and source of the TFT, and a source potential of the TFT is connected to a fixed potential through a TFT used as a switching transistor.

A pixel circuit includes a data line, a sensing line, a first pixel sub-circuit and a second pixel sub-circuit. The first pixel sub-circuit includes a first writing unit, a first sensing unit and a first driving unit. The first driving unit is configured to drive a first light-emitting unit to emit light. The second pixel sub-circuit includes a second writing unit, a second sensing unit and a second driving unit. The second driving unit is configured to drive a second light-emitting unit to emit light. The first writing unit and the second sensing unit are both configured to be connected to a gate driving unit. The second writing unit and the first sensing unit are both configured to be connected to another gate driving unit.

The disclosure provides a pixel circuit and a driving method thereof, a display device. The pixel circuit includes: a storage capacitor having a first terminal coupled to a first node and a second terminal coupled to a second node; a light emitting diode having a first electrode coupled to a third node and a second electrode coupled to a second power supply terminal; a data writing circuit configured to write a data voltage into the second node; a compensation circuit configured to write a voltage of the third node, as a compensation voltage, into the first node; a driving transistor having a control terminal coupled to the first node, a first electrode coupled to a first power supply terminal and a second electrode coupled to the light emitting control circuit; a light emitting control circuit configured to control the light emitting diode to emit light.

A display driving circuit includes: a grayscale voltage generator configured to generate a plurality of grayscale voltages by linearly dividing a plurality of gamma tap voltages; a gamma correction module configured to calculate a compensation value with respect to an input pixel value by using a compensation model, and configured to apply the compensation value to the input pixel value to generate a compensated pixel value; and a data driver configured to receive the plurality of grayscale voltages from the grayscale voltage generator, and configured to output a data voltage corresponding to a grayscale voltage to a display panel, the grayscale voltage being selected from the plurality of grayscale voltages based on the compensated pixel value.

A display device includes a display unit including a plurality of pixels and a sensing unit disposed outside the display unit, where the sensing unit senses deterioration information of a driving transistor in each of the pixels through a plurality of sensing lines, and compensates for deterioration of the driving transistor. the sensing unit senses the deterioration information during a first sensing period, and the first sensing period is included in each of a power-off period in which power for the display device to display an image is not supplied, a power-on period in which the display device is turned on, and an image display period in which the image is continuously displayed after the display device is turned on.

A compensation method include that an electronic device determines, based on statistical data of a first display and a first correspondence, a first actual value of a to-be-measured parameter of the first display at the end of a first statistical period; determines, based on statistical data of a second display and a second correspondence, a second actual value of a to-be-measured parameter of the second display at the end of the first statistical period; determines a compensation target value based on the first actual value and the second actual value when the first actual value is less than the second actual value; and writes the compensation target value into a first register configured to control the to-be-measured parameter of the first display, and writes the compensation target value into a second register configured to control the to-be-measured parameter of the second display.

In a pixel circuit of a display device in which display luminance is controlled by a holding voltage of the capacitor Cst, a gate terminal of a drive transistor M1 is connected to a source terminal of the drive transistor M1 via a capacitance selection transistor M3 and the holding capacitor Cst and is also connected to the source terminal via only an auxiliary writing capacitor Cwa. During a data writing period Tw, the capacitance selection transistor M3 is turned off, and data voltage is provided from a data signal line Dj to the auxiliary writing capacitor Cwa via a writing control transistor M2. Thereafter, the writing control transistor M2 is turned off, the capacitance selection transistor M3 is turned on, so that charges are redistributed between the auxiliary writing capacitor Cwa and the holding capacitor Cst, whereby a driving holding voltage is determined.