Invention Grant
- Patent Title: Capacitance sensing matrix for keyboard architecture
- Patent Title (中): 键盘架构的电容感应矩阵
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Application No.: US13297046Application Date: 2011-11-15
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Publication No.: US08482437B1Publication Date: 2013-07-09
- Inventor: Liu Hua , Jiang XiaoPing
- Applicant: Liu Hua , Jiang XiaoPing
- Applicant Address: US CA San Jose
- Assignee: Cypress Semiconductor Corporation
- Current Assignee: Cypress Semiconductor Corporation
- Current Assignee Address: US CA San Jose
- Main IPC: H03K17/94
- IPC: H03K17/94 ; H03M11/00 ; G01R27/26 ; G06F3/041 ; G06F3/044 ; G06F3/045 ; G08C21/00

Abstract:
An apparatus and method for selecting a keyboard key based on a position of a presence of a conductive object on a sensing device and a pre-defined area of the keyboard key. The apparatus may include a sensing device and a processing device. The sensing device may include a plurality of sensor elements to detect a presence of a conductive object on the sensing device. Multiple keyboard keys are assigned to pre-defined areas of the sensing device. The processing device is coupled to the sensing device using capacitance sensing pins, and may be operable to determine a position of the presence of the conductive object, and to select a keyboard key based on the position of the conductive object and the pre-defined areas of the sensing device.
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