公开(公告)号：US20180096670A1

公开(公告)日：2018-04-05

申请号：US15714206

申请日：2017-09-25

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Yuji IWAKI ,  Hideaki OKAMOTO

IPC: G09G5/395 ,  G09G5/42 ,  G09G5/00 ,  G09G3/20 ,  G09G3/36

Abstract: A novel display system is provided. The display system includes a display portion and a control portion. The control portion includes a controller and a memory device. The display portion has a function of displaying an image. The controller has a function of outputting a signal for controlling a refresh rate of the image. The memory device has a function of storing data including data indicating a recognition state of the image and data on whether a flicker is recognized in the recognition state by a user or not. The controller has a function of changing the refresh rate of the image with reference to the data stored in the memory device when data on whether a flicker is recognized or not is input by the user.