Invention Grant
- Patent Title: Touch screen calibration and update methods
- Patent Title (中): 触摸屏校准和更新方法
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Application No.: US13053229Application Date: 2011-03-22
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Publication No.: US09052771B2Publication Date: 2015-06-09
- Inventor: Magnus Goertz , Thomas Eriksson , Joseph Shain , Anders Jansson , Niklas Kvist , Robert Pettersson , Lars Sparf , John Karlsson
- Applicant: Magnus Goertz , Thomas Eriksson , Joseph Shain , Anders Jansson , Niklas Kvist , Robert Pettersson , Lars Sparf , John Karlsson
- Applicant Address: US CA Santa Clara
- Assignee: Neonode Inc.
- Current Assignee: Neonode Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: Soquel Group LLC
- Main IPC: G06F3/042
- IPC: G06F3/042 ; G06F3/041 ; G06F3/0484 ; G06F3/0488

Abstract:
A method of calibrating optical components in a light-based touch screen, including providing (i) a display, (ii) a row of light pulse emitters that sequentially transmit light pulses over the display according to calibrated pulse current and pulse duration controls, and (iii) a row of light pulse receivers that receive the light pulses and that output values representing the received light pulses, each receiver having expected values for emitter-receiver pairs when the light pulses are not blocked, determining if each receiver output value for a receiver-emitter pair is within a respective designated range from the corresponding receiver expected value, and when a receiver output value for a receiver-emitter pair is outside the designated range, recalibrating the emitter, including adjusting at least one of the emitter pulse current and pulse duration such that subsequent receiver output values are within the designated range, and updating the receiver expected value for the receiver-emitter pair based on subsequent output values of the receiver.
Public/Granted literature
- US20110169781A1 TOUCH SCREEN CALIBRATION AND UPDATE METHODS Public/Granted day:2011-07-14
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