公开(公告)号：US20210056923A1

公开(公告)日：2021-02-25

申请号：US17073634

申请日：2020-10-19

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Seiko AMANO ,  Hiroyuki MIYAKE

IPC: G09G3/36 ,  G06F3/038 ,  G09G3/3266 ,  G11C19/28 ,  G06F1/3234 ,  H01L27/12

Abstract: In a pulse output circuit in a shift register, a power source line which is connected to a transistor in an output portion connected to a pulse output circuit at the next stage is set to a low-potential drive voltage, and a power source line which is connected to a transistor in an output portion connected to a scan signal line is set to a variable potential drive voltage. The variable potential drive voltage is the low-potential drive voltage in a normal mode, and can be either a high-potential drive voltage or the low-potential drive voltage in a batch mode. In the batch mode, display scan signals can be output to a plurality of scan signal lines at the same timing in a batch.

公开(公告)号：US20170148408A1

公开(公告)日：2017-05-25

申请号：US15393389

申请日：2016-12-29

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Seiko AMANO ,  Hiroyuki MIYAKE

IPC: G09G3/36 ,  G11C19/28 ,  G06F1/32 ,  H01L27/12

Abstract: In a pulse output circuit in a shift register, a power source line which is connected to a transistor in an output portion connected to a pulse output circuit at the next stage is set to a low-potential drive voltage, and a power source line which is connected to a transistor in an output portion connected to a scan signal line is set to a variable potential drive voltage. The variable potential drive voltage is the low-potential drive voltage in a normal mode, and can be either a high-potential drive voltage or the low-potential drive voltage in a batch mode. In the batch mode, display scan signals can be output to a plurality of scan signal lines at the same timing in a batch.