Peking University

Shenzhen China Star Optoelectronics Technology Co., Ltd.

Shijie Cao

Shengdong Zhang

Congwei Liao

Zhijin Hu

Wenjie Li

Junmei Li

Chang-yeh Lee

An organic light emitting diode panel, a gate driver circuit and a gate driver circuit unit are disclosed, where the gate driver circuit includes a scanning signal generating unit for generating a scanning signal, transmitting a first clock signal to a scanning signal output terminal under the control of a pulse signal, and pulling down and maintaining the voltage of the scanning signal output terminal at a low voltage level under the control of a second clock signal. The gate driver circuit unit also includes a light emitting signal generating unit for generating a light emitting signal, pulling down the voltage of the light emitting signal output terminal under the control of the pulse signal, and charging the light emitting signal output terminal under the control of the second clock signal.

Organic light emitting diode panel, gate driver circuit and unit thereof

The present application discloses a shift register and units thereof, wherein low voltage level maintaining module () includes: a first maintaining unit () and a second maintaining unit (), configured to maintain a signal output terminal and/or the controlling terminal (Q) of the driving module () at low voltage level when an effective level is received. A threshold voltage sensing module () is coupled between the first maintaining unit () and the second maintaining unit (), the threshold voltage sensing module () is configured to control its signal output terminal to provide an effective level to the second maintain-enabling terminal (P) according to threshold voltage shift of the first maintaining unit () sensed. Therefore, low voltage maintaining module () may endure a greater threshold voltage shift, and the life span of the circuit is extended. The present application further discloses a display device and a voltage regulating circuit.

Shift register, unit thereof, and display device

A shift register is disclosed. The shift register comprises a multistage shift register units. Each of the stage shift register unit comprises: a driving module, charging to the driving signal via the first clock signal based on the driving control signal; an input module, outputting the driving control signal based on the second clock signal and the first control signal; a low level maintenance module, keeping the potential of the driving signal at the low level potential of the second reference. The shift register can avoid the leakage from the first output end, decrease the raising time of the driving signal and occupy the small area.

Shift register

A photoelectric sensor and a display panel comprise: a pulse transmission unit comprising a control node, after obtaining a driving voltage, the control node of the pulse transmission unit transmitting first clock signals to a signal output terminal; a pulse control unit configured to receive scanning signals from a signal input terminal and charging the control node of the pulse transmission unit so as to provide the driving voltage; and photoelectric sensing unit configured to provide a leakage current in response to the intensity of external illumination when receiving the external illumination, the leakage current discharging the control node of the pulse transmission unit, so that the voltage at the control node of the pulse transmission unit is less than the driving voltage after a period of time. The circuit of the photoelectric sensor utilizes the existing scanning signals and clock signals of a conventional display panel, with no need for an extra control signal, and therefore the circuit is simple in structure, and more suitable for being integrated on the display panel.

Photoelectric sensor and display panel

A gate driving circuit and a display device are disclosed. The gate driving circuit includes a control module for pulling down the level of the second control node to be at the low level before the gate strobe signals are outputted and during the output period of the gate cutoff signals. In this way, the second pull-down control end of the low level maintaining module is pulled down to be at the low levels, and the low level maintaining module is in the off state. In this way, the electrical leakage of the low level maintaining module may be reduced so as to decrease the output delay of the gate signals and to enhance the efficiency of the circuit.

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Guangdong, China

Shijie Cao