TOUCH-INPUT DISPLAY DEVICES WITH FORCE MEASUREMENT USING PIEZOELECTRIC PILLARS
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United States of America Patent
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Oct 6, 2017
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Feb 17, 2016
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Abstract
A touch-input display device includes a substrate, piezoelectric pillars that are on and extend away from a surface of the substrate, and light emitter devices each coupled to a different one of the piezoelectric pillars. The substrate has power lines and signal lines. The piezoelectric pillars are electrically isolated from each other, and each of the piezoelectric pillars includes a piezoelectric material that generates an electric voltage across a pair of the signal lines responsive to an applied touch force compressing the piezoelectric pillar. The light emitter devices are each electrically connected to a pair of the power lines.
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