公开(公告)号：US20160062546A1

公开(公告)日：2016-03-03

申请号：US14474960

申请日：2014-09-02

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Kusuma Adi Ningrat ,  Giuseppe Noviello ,  Jenn Woei Soo ,  Lokesh Kumar Korapati

IPC: G06F3/041 ,  G09G5/12 ,  G06F3/044

CPC classification number: G09G5/12 ,  G06F3/044 ,  G09G2320/0247

Abstract: A video display includes a video display panel and a video display drive circuit configured to control a display on condition. A touch screen includes a touch screen panel (mounted on top of the video display panel) and a touch panel control and sense circuit configured to operate the touch screen panel in a self-capacitance mode. The touch panel control and sense circuit includes sense drive circuits configured to generate sense drive signals for application to sense lines of the touch screen panel. A controller controls actuation of the sense drive circuits so that the sense drive signals are synchronized to the display on condition. In an implementation, the leading edges of the sense drive signals are synchronized to the display on condition. In another implementation, a window is synchronized to the display on condition and the leading edges of the sense drive signals exhibit jitter within the window.

Abstract translation: 视频显示器包括视频显示面板和视频显示驱动电路，视频显示驱动电路被配置为控制显示状态。 触摸屏包括触摸屏面板（安装在视频显示面板的顶部）以及触摸面板控制和感测电路，被配置为以自电容模式操作触摸屏面板。 触摸面板控制和感测电路包括感测驱动电路，其被配置为产生感测驱动信号以用于感测触摸屏面板的线。 控制器控制感测驱动电路的致动，使得感测驱动信号在状态下与显示器同步。 在一个实现中，感测驱动信号的前沿在状态下与显示器同步。 在另一实现中，窗口在条件下与显示器同步，并且感测驱动信号的前沿在窗口内呈现抖动。

公开(公告)号：US09524697B2

公开(公告)日：2016-12-20

申请号：US14474960

申请日：2014-09-02

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Kusuma Adi Ningrat ,  Giuseppe Noviello ,  Jenn Woei Soo ,  Lokesh Kumar Korapati

IPC: G09G5/12 ,  G06F3/044

CPC classification number: G09G5/12 ,  G06F3/044 ,  G09G2320/0247

Abstract: A video display includes a video display panel and a video display drive circuit configured to control a display on condition. A touch screen includes a touch screen panel (mounted on top of the video display panel) and a touch panel control and sense circuit configured to operate the touch screen panel in a self-capacitance mode. The touch panel control and sense circuit includes sense drive circuits configured to generate sense drive signals for application to sense lines of the touch screen panel. A controller controls actuation of the sense drive circuits so that the sense drive signals are synchronized to the display on condition. In an implementation, the leading edges of the sense drive signals are synchronized to the display on condition. In another implementation, a window is synchronized to the display on condition and the leading edges of the sense drive signals exhibit jitter within the window.

Abstract translation: 视频显示器包括视频显示面板和视频显示驱动电路，视频显示驱动电路被配置为控制显示状态。 触摸屏包括触摸屏面板（安装在视频显示面板的顶部）以及触摸面板控制和感测电路，被配置为以自电容模式操作触摸屏面板。 触摸面板控制和感测电路包括感测驱动电路，其被配置为产生感测驱动信号以用于感测触摸屏面板的线。 控制器控制感测驱动电路的致动，使得感测驱动信号在状态下与显示器同步。 在一个实现中，感测驱动信号的前沿在状态下与显示器同步。 在另一实现中，窗口在条件下与显示器同步，并且感测驱动信号的前沿在窗口内呈现抖动。

公开(公告)号：US20160077625A1

公开(公告)日：2016-03-17

申请号：US14484372

申请日：2014-09-12

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Jenn Woei Soo ,  Kusuma Adi Ningrat

IPC: G06F3/044

CPC classification number: G06F3/044 ,  G06F2203/04108

Abstract: A capacitive touch system generates data indicative of sensed capacitance measured at capacitive sensing nodes of a capacitive touch panel. A signal processing circuit is coupled to receive the data indicative of sensed capacitance from the capacitive touch system. The signal processing circuit operates to fit a parabolic curve to the data indicative of sensed capacitance. A sharpness of the fit parabolic curve is indicative of whether touch versus hover interaction with the capacitive touch panel. A touch detection threshold is as a function of the determined sharpness. The set touch detection threshold is then applied against the data indicative of sensed capacitance in order to make a touch detection.

Abstract translation: 电容式触摸系统产生指示在电容式触摸面板的电容感测节点处测量的感测电容的数据。 信号处理电路被耦合以从电容式触摸系统接收指示感测电容的数据。 信号处理电路用于将抛物线曲线拟合到指示感测电容的数据。 合适的抛物线曲线的清晰度表示触摸与悬浮与电容式触摸面板的相互作用。 触摸检测阈值是确定的清晰度的函数。 然后针对指示感测电容的数据施加设置的触摸检测阈值，以进行触摸检测。

公开(公告)号：US11836318B1

公开(公告)日：2023-12-05

申请号：US17901067

申请日：2022-09-01

Applicant: STMicroelectronics Asia Pacific Pte Ltd.

Inventor： Tchung Jing Siaw ,  Chen Khoi Chin ,  Jenn Woei Soo ,  Cheng Hung Lin

IPC: G06F3/044 ,  G06F3/041 ,  G09G3/20

CPC classification number: G06F3/04184 ,  G06F3/0441 ,  G06F3/0442 ,  G06F3/0446 ,  G09G3/2096 ,  G09G2320/0247

Abstract: A method for operating an electronic device includes a touchscreen controller determining based on a frequency of a vertical synchronization signal (Vsync), whether a first display frame includes an idle time, the idle time being a duration of time remaining in the first display frame after an image displayed on a display of the electronic device is updated during the first display frame. The method further includes in response to determining that the first display frame includes the idle time, the touchscreen controller transmitting an uplink signal in the first display frame, the uplink signal being transmitted during the idle time of the first display frame.

公开(公告)号：US09524067B2

公开(公告)日：2016-12-20

申请号：US14484372

申请日：2014-09-12

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Jenn Woei Soo ,  Kusuma Adi Ningrat

IPC: G06F3/045 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F2203/04108

Abstract: A capacitive touch system generates data indicative of sensed capacitance measured at capacitive sensing nodes of a capacitive touch panel. A signal processing circuit is coupled to receive the data indicative of sensed capacitance from the capacitive touch system. The signal processing circuit operates to fit a parabolic curve to the data indicative of sensed capacitance. A sharpness of the fit parabolic curve is indicative of whether touch versus hover interaction with the capacitive touch panel. A touch detection threshold is as a function of the determined sharpness. The set touch detection threshold is then applied against the data indicative of sensed capacitance in order to make a touch detection.

Abstract translation: 电容式触摸系统产生指示在电容式触摸面板的电容感测节点处测量的感测电容的数据。 信号处理电路被耦合以从电容式触摸系统接收指示感测电容的数据。 信号处理电路用于将抛物线曲线拟合到指示感测电容的数据。 合适的抛物线曲线的清晰度表示触摸与悬浮与电容式触摸面板的相互作用。 触摸检测阈值是确定的清晰度的函数。 然后针对指示感测电容的数据施加设置的触摸检测阈值，以进行触摸检测。