公开(公告)号：US20150378497A1

公开(公告)日：2015-12-31

申请号：US14319715

申请日：2014-06-30

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Kusuma Adi NINGRAT ,  Manivannan PONNARASU

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/044 ,  G06F3/041 ,  G06F3/0418 ,  G06F2203/04104 ,  G06F2203/04108

Abstract: Groove analysis in a device having a tactile input surface suited to detect more than one tactile input at a time. Using groove analysis allows a touch screen device a more robust and efficient algorithm for distinguishing between two different tactile inputs. The touch screen device may include a touch screen controller that includes an analysis circuit for determining grooves between touch inputs. Generally, when a touch input is received at the surface of a touch screen device, the touch screen may register touch strength signals at each of a plurality of touch regions. A groove may be generally defined as a touch region that exhibits a touch strength signal that is less than surrounding touch regions. Once all touch regions are analyzed by a groove analysis, various touch regions determined to grooves may be eliminated from a further analysis to determine the XY coordinates of actual touch inputs.

Abstract translation: 在具有触觉输入表面的设备中的槽分析适合于一次检测多于一个的触觉输入。 使用凹槽分析允许触摸屏设备更鲁棒和有效的算法来区分两种不同的触觉输入。 触摸屏设备可以包括触摸屏控制器，其包括用于确定触摸输入之间的凹槽的分析电路。 通常，当在触摸屏设备的表面处接收到触摸输入时，触摸屏可以在多个触摸区域中的每一个处注册触摸强度信号。 凹槽通常可以定义为呈现小于周围触摸区域的触摸强度信号的触摸区域。 一旦通过凹槽分析来分析所有触摸区域，则可以从进一步的分析中消除确定为凹槽的各种触摸区域以确定实际触摸输入的XY坐标。

公开(公告)号：US20190121488A1

公开(公告)日：2019-04-25

申请号：US16223428

申请日：2018-12-18

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Praveesh CHANDRAN ,  Manivannan PONNARASU ,  Mythreyi NAGARAJAN

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

Abstract: A touch screen controller identifies an island in a matrix of acquired touch data values. A first sharpness of the island is calculated and a second sharpness of the island is calculated if the calculated first sharpness is greater than a sharpness threshold. A dynamic strength threshold is then determined as a function of the second sharpness if a variance of the island is greater than a dynamic variance threshold. A determination is then made that the identified island is a valid stylus island if a peak strength of the island is greater than the dynamic strength threshold.