Au Optronics Corporation

Pin-Yu Chan

Yung-Chih Chen

Kai-Wei Hong

Li-Wei Liu

Yu-Chung Yang

Chia-En Wu

Ming-Yen Tsai

Ching-Hui Chang

A shift register circuit includes a first transistor, a capacitor, a pull-up control circuit, a first pull-down circuit, a pull-down control circuit, a second pull-down circuit and a compensation circuit. The compensation circuit further includes a second transistor, a third transistor, a fourth transistor, a fifth transistor and a sixth transistor. The second transistor, the third transistor, the fourth transistor, and the fifth transistor are corporately used to output a compensation pulse; and the sixth transistor is used to output the compensation pulse to a gate terminal of the first transistor thereby compensating a control signal.

Shift register circuit

A gate driver has a plurality of shift registers. Each of the shift registers has at least three input terminals, two signal input terminals, a pull-up circuit, a driving circuit, a stability pull-down control circuit, and a stability pull-down circuit. The three input terminals of each shift register receive three different clock signals. Accordingly, the driving circuit and the stability pull-down control circuit of each shift register are controlled according to the three clock signals, such that a glitch causing by the coupling effect of the parasitic capacitor of the driving circuit is avoided and the stability of the gate driver is improved.

Gate driver and shift register

A shift register circuit has a plurality of shift registers. Each of the shift registers has at least four input terminals, a signal input terminal, an output terminal, a pull-up circuit, a driving circuit, a stability driving circuit, and a pull-down circuit. The signal input terminal receives an input signal, and the pull-up circuit is configured to pull up a voltage level of a node of the shift register. The driving circuit outputs a gate driving signal according to the voltage level of the node. The pull-down circuit is configured to pull down the voltage level of the node. The stability driving circuit can pull down the voltage of the output terminal according to the voltages of the four input terminals, and, thus, can reduce the response time of the shift register circuit and increase the operation region of the shift register circuit.

Shift register circuit and shift register

A shift register of a gate driving circuit includes a pull-up unit for pulling up a first output signal and a first gate signal to a high voltage level according to a driving voltage and a high-frequency clock signal, a start-up unit for transmitting a second gate signal, an energy-store unit for providing the driving voltage to the pull-up unit according to the second gate signal, a first discharging unit for pulling down the driving voltage to a first voltage level according to a first control signal, a first leakage-preventing unit for turning off the first discharging unit when the first gate signal reaches the high voltage level, a first pull-down unit for respectively pulling down the first output and first gate signals to the first and a second voltage levels according to the first control signal, and a first control unit for generating the first control signal.

Gate driving circuit

A shift register includes a plurality of shift register circuits, where an Nth shift register circuit of the shift register includes a driving unit, a boost unit, a pull up unit, and a key pull down unit. The driving unit is for providing a gate signal, a first boost control signal, and a first transmission control signal according a first driving signal and a high frequency clock signal. The boost unit is for boosting the voltage of the first driving signal according to a first boost signal. The pull up unit is for providing a second driving signal according to the first transmission control signal and the gate signal, and is for providing a second boost signal according to the first boost control signal and a second boost control signal. The key pull down unit is for pulling down the first driving signal according to a second transmission control signal.

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Hsin-Chu, Taiwan

Pin-Yu Chan