公开(公告)号：US09898109B2

公开(公告)日：2018-02-20

申请号：US14958612

申请日：2015-12-03

Applicant: Silicon Integrated Systems Corp.

Inventor： Min-Yan Ciou ,  Chin-Hua Kuo ,  Ying-Jyh Yeh

IPC: G06F3/038 ,  G06F3/041 ,  G06F3/044 ,  G06F3/0354

CPC classification number: G06F3/0383 ,  G06F3/03545 ,  G06F3/0416 ,  G06F3/044

Abstract: The disclosure provides an active stylus pen and signal transmission methods for the active stylus pen and a touch panel. The stylus has a touch module, a switching module, a signal comparison module, a control module and a pressure sensing module. The stylus determines a first signal generated by a touch panel, and compares an intensity of the first signal and a reference value through a first transmission path. When the intensity of the first signal exceeds the reference value, the stylus outputs a second signal to the touch panel. After the stylus outputs the second signal to the touch panel, the stylus switches to a second transmission path from the first transmission path. The stylus outputs a header signal to the touch panel. When determining a first time sequential distribution, the stylus outputs at least one bit of a pressure signal according to a second time sequential distribution.

公开(公告)号：US09785216B2

公开(公告)日：2017-10-10

申请号：US14930846

申请日：2015-11-03

Applicant: Silicon Integrated Systems Corp.

Inventor： Mu-Tsan Yu ,  Min-Yan Ciou ,  Ying-Jyh Yeh

IPC: G06F1/00 ,  G06F1/32

CPC classification number: G06F1/3203 ,  G06F1/3206 ,  G06F1/3243 ,  Y02D10/152

Abstract: A power management apparatus and a power management method are provided. The method includes the following steps. Conduct a first current path during a first period. Provide a first voltage to an operation end when the first current path conducts and a microprocessor is disabled. The first voltage is used to selectively conduct a second path during the first period. Provide a second voltage to the microprocessor when the second current path conducts. The second voltage is used to turn on the microprocessor. Provide a third voltage to the operation end by the microprocessor when the microprocessor is turned on. The third voltage is used to keep the second current path conducted.