发明名称 Calibration for pressure effects on touch sensor panels
摘要 A touch sensor panel which has been calibrated to be insensitive to effects from an external force applied to the panel is provided. Touch sense circuitry settings are adjusted during a calibration procedure so that when a force is exerted on the device, no change in the touch signal DC level is seen. In this way, the ability of the touch sensor panel to detect touch or proximity events is not affected by a force being applied to the panel.
申请公布号 US9459738(B2) 申请公布日期 2016.10.04
申请号 US201213490395 申请日期 2012.06.06
申请人 Apple Inc. 发明人 Lin Albert;Kwon Joon Heup
分类号 G06F3/044;G06F3/041 主分类号 G06F3/044
代理机构 Morrison & Foerster LLP 代理人 Morrison & Foerster LLP
主权项 1. A non-transitory computer readable storage medium having stored thereon a set of instructions for controlling a touch sensor panel comprising a plurality of touch nodes of the touch sensor panel sharing a common local oscillator, that when executed by a processor causes the processor to: generate one or more stimulation signals to stimulate one or more drive lines by a drive circuitry; operate a control logic for controlling a sense circuitry; capture one or more first output values from one or more sense channels of the sense circuitry while the touch sensor panel is in a compressed state, wherein the touch sensor panel includes a gap at least partially between a touch sensor stackup and a display stackup, the gap capable of being compressed when pressure is applied to the touch sensor panel such that at least one portion of the display stackup and at least one portion of the touch sensor stackup are closer together in the compressed state than in a non-compressed state; capture one or more second output values from the one or more sense channels of the sense circuitry while the touch sensor panel is in the non-compressed state; and configure the drive circuitry, the sense circuitry, or both to reduce a difference between the one or more first output values and the one or more second output values by setting the variable phase, frequency, or both of the common local oscillator to a value based on the one or more first output signal values and the one or more second output signal values associated with respective nodes of the plurality of touch nodes sharing the common local oscillator, the one or more first output values and the one or more second output values indicative of a substantially equivalent touch or no-touch input condition of the touch sensor panel, the touch or no-touch input condition associated with a proximity of a conductive object to the touch sensor panel.
地址 Cupertino CA US