公开(公告)号：US20140126271A1

公开(公告)日：2014-05-08

申请号：US14064264

申请日：2013-10-28

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Takeshi Aoki ,  Takayuki Ikeda ,  Yoshiyuki Kurokawa

IPC: G11C11/412

CPC classification number: G11C14/0072

Abstract: To provide a semiconductor device in which power consumption can be reduced and operation delay due to a stop and a restart of supply of power supply voltage can be suppressed and a driving method thereof. A potential corresponding to data held in a period during which power supply voltage is continuously supplied is saved to a node connected to a capacitor before the supply of power supply voltage is stopped. By utilizing change of channel resistance of a transistor whose gate is the node, data is loaded when the supply of power supply voltage is restarted.

Abstract translation: 提供一种半导体装置，其能够降低功率消耗，并且可以抑制由于电源电压的停止和重新开始引起的操作延迟及其驱动方法。 在供给电源电压停止之前，与在电源电压连续供给的期间保持的数据相对应的电位被保存到与电容器连接的节点。 通过利用栅极为节点的晶体管的沟道电阻的变化，在重新开始供电电源时加载数据。

公开(公告)号：US20130321366A1

公开(公告)日：2013-12-05

申请号：US13895568

申请日：2013-05-16

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Munehiro KOZUMA ,  Takayuki Ikeda ,  Yoshiyuki Kurokawa ,  Hikaru Tamura ,  Takeshi Aoki

IPC: G09G3/34

CPC classification number: G09G3/34 ,  G06F3/0412 ,  G06F3/0421

Abstract: To reduce the effect of external light and to improve the accuracy of detecting the location of a touch. In an image-capture period, light emission from a self-light-emitting element is controlled, and imaging data at the time of displaying white on a display screen and imaging data at the time of displaying black on the display screen are output from each sensor pixel. The location of a sensor pixel where a difference between the two pieces of imaging data output from the same sensor pixel is the greatest is detected. Thus, the location of a touch of the object on the display screen is detected with high accuracy. By utilizing a difference between imaging data at the time of reverse display, the effect of external light can be reduced.

Abstract translation: 减少外部光线的影响，提高检测触摸位置的准确性。 在图像捕获期间，控制来自自发光元件的发光，并且在显示屏幕上显示白色的成像数据和在显示屏幕上显示黑色时的成像数据从每个 传感器像素。 检测从相同传感器像素输出的两个成像数据之间的差最大的传感器像素的位置。 因此，高精度地检测物体在显示屏幕上的触摸位置。 通过利用反向显示时的成像数据之间的差异，可以减少外部光的影响。