Lg Display Co., Ltd.

Mookyoung Hong

Nari Kim

Taegung Kim

Jongsik Shim

KyoungDon Woo

Boeon Byeon

Minho Cho

SangGoo Kwon

Kwangmo Park

DongKyu Yang

The present disclosure provides a display device and a driving circuit. In the display device, a first subpixel is connected to a first data line and a first reference voltage line, and includes an emitting device and a driving transistor; and a second subpixel is connected to a second data line and a second reference voltage line, and includes an emitting device and a driving transistor. The driving time of the first subpixel includes a first initialization time in which a reference voltage is applied to the first reference voltage line and a first tracking time in which a voltage of the first reference voltage line increases from the reference voltage and then is saturated. Sensing times for subpixels having different channel sizes are reduced.

Display device and driving circuit

A display device can include a display panel having a plurality of sub-pixels, a data driver configured to apply a data signal to the plurality of sub-pixels, a gate driver configured to apply a gate signal to the plurality of sub-pixels, a timing controller configured to output control signals to the data driver and the gate driver, and a power controller configured to detect a defect associated with the display panel, and generate and output a defect signal corresponding on a type of the detected defect. The timing controller stores defect-related information associated with the defect signal.

Display device and driving method thereof

The present invention relates to an organic light emitting display device that changes a reference voltage commonly applied to a driving transistor in all pixels, based on a characteristic value sensed according to each pixel.

Organic light emitting display device

A display device includes a display panel, a driver IC, and a control circuit. The control circuit includes operation circuitry to calculate the magnitude of a driving current flowing in a first pixel column in response to first voltage information from the driver IC, where the first voltage information corresponding to a voltage level of a first power supply line applied to a first pixel group of the display panel. The operation circuitry also calculates a compensation gain by comparing the magnitude of the driving current with preset current information. Further, the control circuit includes a compensator to receive a first data signal, generate a second data signal by applying the compensation gain to the first data signal, and transfer the second data signal to the driver IC. The display device and driving method may suppress image quality degradation by monitoring a high-potential voltage and correcting a data signal.

Display device and driving method for the same

A display device includes: a plurality of gate lines in a display panel, a gate driver configured to sequentially output scan signals to the plurality of gate lines, a gate pulse modulation integrated circuit configured to: receive an input of a gate high voltage used to generate the scan signals, modulate the gate high voltage, and output the modulated gate high voltage to the gate driver, and a controller configured to: output a gate clock signal to the gate driver, output a gate pulse modulation signal to the gate pulse modulation integrated circuit, count a number of times the gate pulse modulation signal is output, and output an output compensation signal to the gate pulse modulation integrated circuit when the number of times is identical to a number of the plurality of gate lines.

Display device and controller

The present disclosure relates to an organic light emitting display device that performs sensing and compensation for a characteristic value of a subpixel, and provide the organic light emitting display device that detects whether a sensing environment has a defect via transceiving a signal between a controller and a data driver before sensing is performed in a period in which the characteristic value of the subpixel is sensed, and controls sensing of the characteristic value of the subpixel according to detection of whether the sensing environment has a defect. According to the present disclosure, an error of sensing data due to a defect in the sensing environment may be prevented and an image abnormality due to compensation performed based on erroneous sensing data may be prevented, by detecting a defect in the sensing environment and stopping sensing of the characteristic value of the subpixel when the sensing environment has a defect.

Organic light emitting display device and controller

An organic light-emitting display device includes: an organic light-emitting display panel including: a plurality of subpixels including: an organic light-emitting diode (OLED), a driving transistor (DT) driving the OLED including a first transistor between a first node of the DT and a data line, and a second transistor (T) between a second node of the DT and a reference voltage line having a reference voltage (RV) applied, a sensor, and a sampling switch, wherein, during an OLED short detection period for detecting a short circuit between the first electrode and a second electrode of the OLED: the DT and the first transistor are off, when the Tis turned off, the RV line is initialized when the RV is applied thereto, after the Tis turned on, the sampling switch is turned on to connect the sensor and the RV line, and the sensor measures the RV line voltage.

Organic light-emitting display panel, organic light-emitting display device, driving circuit, controller, and driving method

A gamma tab voltage generator includes a plurality of, a data calculator configured to generate a buffer selection information and a buffer combination information based on a current capacity of buffer, a plurality of digital-to-analog converters configured to generate gamma tab voltages based on a gamma tab voltage information, a buffer selector configured to connect input terminals of the buffers selected based on the buffer selection information to output terminals of the digital-to-analog converters, and a buffer combiner configured to connect output terminals of the selected buffers to one another in response to the buffer combination information.

Growing community of inventors

Jinhae-si, South Korea

Mookyoung Hong