公开(公告)号：US20210125547A1

公开(公告)日：2021-04-29

申请号：US17075066

申请日：2020-10-20

Applicant: AU Optronics Corporation

Inventor： Chih-Lung LIN ,  Po-Cheng LAI ,  Ting-Ching CHU ,  Po-Chun LAI ,  Mao-Hsun CHENG

IPC: G09G3/32

Abstract: A pixel circuit including a compensation circuit, a writing circuit, a light emitting element, and a power supplying circuit is provided. The compensation circuit comprises a first node, and provides a driving current to the light emitting element according to a voltage of the first node and a system high voltage. The writing circuit provides a data voltage to the compensation circuit according to a first control signal so that the compensation circuit sets the voltage of the first node. The power supplying circuit selectively couples the compensation circuit to the light emitting element, and provides the system high voltage and a system low voltage to the compensation circuit, in which the system low voltage is configured to reset the voltage of the first node. The first control signal and the second control signal are opposite to the first emission signal and the second emission signal, respectively.

公开(公告)号：US20210241686A1

公开(公告)日：2021-08-05

申请号：US17004042

申请日：2020-08-27

Applicant: AU Optronics Corporation

Inventor： Mao-Hsun CHENG ,  Cheng-Han HUANG ,  Ching-Sheng CHENG

IPC: G09G3/3225 ,  G09G3/20 ,  G09G3/3291 ,  H01L27/32

Abstract: A pixel structure includes a light-emitting module, multiple sub-pixel circuits, and an internal driving circuit. The light-emitting module includes multiple sub-pixel light-emitting elements, and is disposed on a first plane. The multiple sub-pixel circuits are disposed on a second plane, and each of the multiple sub-pixel circuits is electrically connected with a corresponding one of the multiple sub-pixel light-emitting elements. The internal driving circuit is disposed on the second plane, and is electrically connected with one of the multiple sub-pixel circuits. The first plane is different from the second plane, and the multiple sub-pixel circuits and the internal driving circuit are located in a vertical projection projected by the light-emitting module onto the second plane.

公开(公告)号：US20200168140A1

公开(公告)日：2020-05-28

申请号：US16677757

申请日：2019-11-08

Applicant: AU Optronics Corporation

Inventor： Yi-Chiung CHEN ,  Hsiang-Sheng CHANG ,  Mao-Hsun CHENG

IPC: G09G3/00 ,  G09G3/3266 ,  G09G3/3291

Abstract: A display panel has an active area and a peripheral area. The display panel includes N gate lines, N shift register, a plurality of pixel circuits, a switch circuit and a plurality of test pads. The switch circuit is arranged in the peripheral area, and electrically coupled to the N shift register, the N gate lines and the pixel circuits. The switch circuit is configured to receive a control signal and an enable signal, and pull down voltage level of N gate lines to a low voltage level. The test pads circuit are arranged in the peripheral area, and electrically coupled to the switch circuit and the pixel circuits. The test pads are configured to provide the control signal, the enable signal, a data signal and a reference signal.

公开(公告)号：US20200074922A1

公开(公告)日：2020-03-05

申请号：US16239606

申请日：2019-01-04

Applicant: AU Optronics Corporation

Inventor： Mao-Hsun CHENG

IPC: G09G3/3225 ,  G09G3/3291

Abstract: A high-brightness display device includes a plurality of pixel circuits and a driving line. The driving line is configured to provide a first data signal and a second data signal to a column of pixel circuits of the plurality of pixel circuits. When the high-brightness display device is operated in a normal mode, the first data signal is a DC signal and the second data signal is an AC signal, and a driving current of a pixel circuit of the column of pixel circuits has a first maximum current value. When the high-brightness display device is operated in a high-brightness mode, the first data signal and the second data signal are both the AC signals, and the driving current of the pixel circuit have a second maximum current value. The second maximum current value is larger than the first maximum current value.

公开(公告)号：US20210090489A1

公开(公告)日：2021-03-25

申请号：US16880203

申请日：2020-05-21

Applicant: AU Optronics Corporation

Inventor： Chia-Che HUNG ,  Mao-Hsun CHENG

IPC: G09G3/32

Abstract: A pixel circuit including a writing circuit, a compensation circuit, a reset circuit, a brightness control circuit, and a light emission control circuit is provided. The writing circuit provides a first data signal and a second data signal. A first compensation unit of the compensation circuit provides, in a first time period, a first driving current according to the first data signal. A second compensation unit of the compensation circuit provides, in a second time period separated from the first time period, a second driving current according to the second data signal. The reset circuit provides a reference voltage to the compensation circuit. The light emission control circuit conducts the first compensation unit to the brightness control circuit in the first time period, and conducts the second compensation unit to the brightness control circuit in the second time period.

公开(公告)号：US20200294436A1

公开(公告)日：2020-09-17

申请号：US16653459

申请日：2019-10-15

Applicant: AU Optronics Corporation

Inventor： Po-Cheng LAI ,  Mao-Hsun CHENG ,  Cheng-Han HUANG ,  Yung-Chih CHEN ,  Ching-Sheng CHENG ,  Chih-Lung LIN

IPC: G09G3/20 ,  G11C19/28

Abstract: A shift register circuit and a gate driver including the shift register circuit. The shift register circuit includes an input circuit, a drive circuit, a pull-down circuit, a regulator circuit and a pull-up circuit. The input circuit is configured to receive a first clock signal and is coupled to the first node. The driving circuit is configured to receive the first clock signal and a second clock signal. The input circuit is coupled to the first node. The pull-down circuit is configured to receive the voltage of the first node. The pull-down circuit is coupled to the first node and an output terminal. The pull-down circuit outputs the first voltage to the output terminal in response to the voltage of the first node.

公开(公告)号：US20200243001A1

公开(公告)日：2020-07-30

申请号：US16734455

申请日：2020-01-06

Applicant: AU Optronics Corporation

Inventor： Yi-Chiung CHEN ,  Mao-Hsun CHENG

IPC: G09G3/32

Abstract: A pixel circuit is disclosed herein, which includes a first switch, a capacitor, a driving transistor, and a light-emitting diode (LED). The first switch outputs voltage data in response to a scan signal. A first terminal of the capacitor and the first switch are coupled to a node. A second terminal of the capacitor receives a reference signal. The driving transistor is coupled to the node, and configured to output current according to a voltage stored in the node. The LED is coupled to the driving transistor, and emits light according to the current. The reference voltage is different during different operation periods. The driving transistor outputs a first current according to the voltage data and the voltage difference, and outputs a second current according to the voltage data during different operation periods, such that the LED emits a first light and a second light during different operation periods.

公开(公告)号：US20200090607A1

公开(公告)日：2020-03-19

申请号：US16263008

申请日：2019-01-31

Applicant: AU Optronics Corporation

Inventor： Chia-Che HUNG ,  Mao-Hsun CHENG ,  Jian-Shen YU

IPC: G09G3/36 ,  G02F1/133 ,  G02F1/1362

Abstract: A display device driving method, applicable to a display device including a pixel circuit coupled with a first node point, a source driving circuit for providing a data signal, and a reading circuit, including following operations: coupling the first node point with the source driving circuit or the reading circuit; supplying a first control signal to the pixel circuit, wherein the first control signal is for enabling the pixel circuit to receive the data signal from the first node point; supplying a second control signal to an optical sensing circuit, wherein the second control signal is for enabling the optical sensing circuit to output a sensing signal to the reading circuit through the first node point; utilizing the reading circuit to amplify the sensing signal and output the amplified sensing signal, wherein duration of the second impulse overlaps with duration of the first impulse.