Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.

Shenzhen China Star Optoelectronics Technology Co., Ltd.

Hongjun Xie

Jimu Kuang

Xiaolong Chen

Yufeng Jin

The present invention provides a driving compensation circuit for an organic light-emitting diode (OLED) display unit. The OLED display unit includes: N first switching transistors, N second switching transistors, N sensing units, and a calculation and processing unit. The calculation and processing unit is configured to calculate a mapping relationship between a data voltage of the data line and current information, and to calculate a data compensation voltage in a display phase according to second current information and the mapping relationship.

Driving compensation circuit for OLED display unit, OLED display circuit, and OLED display

Disclosed is a method for compensating a pixel driving circuit of an OLED display panel. In the compensation method, a driving transistor is enabled to operate stably in a saturation region for twice, and a threshold voltage of the driving transistor is calculated based on a collected charging voltage and charging time. A pixel driving circuit is compensated by establishing a threshold-voltage compensation table. The compensation method is easy to operate and can significantly improve a detecting speed of a threshold voltage. Moreover, an effect of a voltage-current conversion factor on detecting accuracy of a threshold voltage can be avoided.

Method for compensating pixel driving circuit of OLED display panel

The present disclosure provides an AMOLED external electrical compensation detection method, in the display mode, estimating a cross-voltage between the drain and the source of the detecting TFT, calculating a gate-source voltage of the driving TFT based on the estimated value, it is possible to improve the writing precision of the gate-source voltage of the driving TFT; in the detection mode, estimating a cross-voltage between the drain and the source of the detecting TFT, calculating a source voltage of the driving TFT based on the estimated value, calculating the threshold voltage and the carrier mobility of the driving TFT based on the calculated voltage of the source of the driving TFT, it is possible to reduce the calculation error between the threshold voltage and the carrier mobility of the driving TFT and improve the accuracy of the external electrical compensation detection of the AMOLED.

AMOLED external electrical compensation detection method

An aging compensation system and an aging compensation method for an organic light emitting diode (OLED) device are disclosed, the aging compensation system for the OLED device comprises a plurality of pixel circuits, a plurality of data lines, a plurality of sense lines, a first power supply, a second power supply, and a source driving chip, the pixel circuit comprises an OLED device and a driving transistor. The number of sense lines and the number of the data lines are equal, each of the sense lines is cooperating with each of the data lines in connection with the pixel circuits, the sense line is connected to an anode of the OLED device via a first transistor; the first power supply is connected to the driving transistor, the second power supply is connected to a cathode of the OLED device; the source driving chip is connected to the data line.

Aging compensation system and method for OLED device

The invention provides an OLED pixel driving circuit and OLED display device. The OLED pixel driving circuit uses 5T1C structure and switch (K). By switch signal (Switch) controlling the switch (K) to connect first pin (K) and second pin (K) to enter display mode, and to connect first pin (K) and third pin (K) to enter sense mode, the ADC (ADC) senses the threshold voltage of the fourth TFT (T), converted and used for data compensation in the display mode, able to compensate and eliminate the impact of threshold voltage of the fourth TFT (T) on the current flowing through the OLED (D); the light-emitting control signal (EM) controls the fifth TFT (T) connected to the OLED (D) to cut off during the data writing stage (t) to keep the data signal voltage and the gate voltage of the fourth TFT (T) unaffected by the OLED (D) threshold voltage.

OLED pixel driving circuit and OLED display device

The invention provides an OLED pixel driving circuit and OLED display device. The OLED pixel driving circuit uses 4T1C structure and switch (K). The first pin (K) of switch (K) is connected to the drain of the third TFT (T), the second pin (K) connected to the DAC (DAC), and the third pin (K) connected to the ADC (ADC). By the switch signal (Switch) controlling the switch (K), the first pin (K) and the second pin (K) are connected to enter the display mode, and by the switch signal (Switch) controlling the switch (K), the first pin (K) and the third pin (K) are connected to enter the sense mode, so that the ADC (ADC) senses the threshold voltage of the fourth TFT (T), converted by ADC (ADC) for data compensation in the display mode. The invention can compensate, improve display uniform, improve pixel aperture ratio and reduce manufacturing cost.

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Guangdong, China

Hongjun Xie