Invention Grant
- Patent Title: Use of random sampling technique to reduce finger-coupled noise
- Patent Title (中): 使用随机采样技术来减少手指耦合噪声
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Application No.: US12987008Application Date: 2011-01-07
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Publication No.: US09391607B2Publication Date: 2016-07-12
- Inventor: Ashutosh Ravindra Joharapurkar , Patrick Chan , David L. Allen , Natarajan Viswanathan
- Applicant: Ashutosh Ravindra Joharapurkar , Patrick Chan , David L. Allen , Natarajan Viswanathan
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Technologies, Inc.
- Current Assignee: QUALCOMM Technologies, Inc.
- Current Assignee Address: US CA San Diego
- Agency: Weaver Austin Villeneuve & Sampson LLP
- Main IPC: G06F3/044
- IPC: G06F3/044 ; H03K17/96 ; G06F3/041

Abstract:
Random sampling techniques include techniques for reducing or eliminating errors in the output of capacitive sensor arrays such as touch panels. The channels of the touch panel are periodically sampled to determine the presence of one or more touch events. Each channel is individually sampled in a round robin fashion, referred to as a sampling cycle. During each sampling cycle, all channels are sampled once. Multiple sampling cycles are performed such that each channel is sampled multiple times. Random sampling techniques are used to sample each of the channels. One random sampling technique randomizes a starting channel in each sampling cycle. Another random sampling technique randomizes the selection of all channels in each sampling cycle. Yet another random sampling technique randomizes the sampling cycle delay period between each sampling cycle. Still another random sampling technique randomizes the channel delay period between sampling each channel.
Public/Granted literature
- US20110261008A1 USE OF RANDOM SAMPLING TECHNIQUE TO REDUCE FINGER-COUPLED NOISE Public/Granted day:2011-10-27
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