Method and device for position detection
First Claim
1. A method for position detection that neglects wide-area touches, comprising:
- providing a sensing device including a plurality of sensors including a plurality of first sensors and a plurality of second sensors, these first and second sensors intersecting each other at a plurality of intersecting points;
obtaining a first 1-D sensing information from signals of the first sensors by self-capacitance detection;
obtaining a second 1-D sensing information from signals of the second sensors by self-capacitance detection;
a detected touch related sensing information is determined based on the range of each touch related sensing information on the first 1-D sensing information and the second 1-D sensing information, wherein each touch related sensing information corresponds to a touch or approach by at least one external object;
at least one 1-D position is analyzed based on each detected touch related sensing information; and
at least one 2-D position is analyzed by performing mutual-capacitance detection on each 1-D position;
wherein the mutual-capacitance detection includes;
providing a driving signal to one of these first sensors as a first signal source, and detecting variations in capactively coupled signals between the first signal source, these first 1-D sensors and the at least one external object using these first sensors;
orproviding a driving signal to one of these second sensors as a first signal source, and detecting variations in capactively coupled signals between the first signal source, these second 1-D sensors and the at least one external object using these second sensors;
selecting a sensor provided with the driving signal from one of these sensors based on the at least one 1-D position;
generating a third 1-D sensing information based on signals of these first sensors or the second sensors when each sensor selected based on the 1-D position is provided with the driving signal;
analyzing at least one first 1-D position based on the third 1-D sensing information;
selecting a sensor provided with the driving signal from one of these sensors based on each first 1-D position;
generating a fourth 1-D sensing information based on signals of these first sensors or the second sensors when each sensor selected based on each first 1-D position is provided with the driving signal;
analyzing at least one second 1-D position corresponding to each first 1-D position based on the fourth 1-D sensing information; and
providing at least one 2-D position based on the at least one second 1-D position corresponding to each first 1-D position.
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Accused Products
Abstract
A method and device for position detection are disclosed. A self-capacitance detection can be performed by a sensing device. According to the result of the self-capacitance detection, a first mutual-capacitance detection can be performed for determining one or more first 1-D positions. According to the result of the first mutual-capacitance detection, a second mutual-capacitance detection can be performed for determining one or more second 1-D positions corresponding to each first 1-D position. One or more 2-D positions can be provided according to the one or more second 1-D positions corresponding to each first 1-D position. Besides, during the self-capacitance detection, the first mutual-capacitance detection, and the second mutual-capacitance detection, a touch related sensing information corresponding to a touch that covers a wide area can be neglected for palm rejection.
53 Citations
12 Claims
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1. A method for position detection that neglects wide-area touches, comprising:
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providing a sensing device including a plurality of sensors including a plurality of first sensors and a plurality of second sensors, these first and second sensors intersecting each other at a plurality of intersecting points; obtaining a first 1-D sensing information from signals of the first sensors by self-capacitance detection; obtaining a second 1-D sensing information from signals of the second sensors by self-capacitance detection; a detected touch related sensing information is determined based on the range of each touch related sensing information on the first 1-D sensing information and the second 1-D sensing information, wherein each touch related sensing information corresponds to a touch or approach by at least one external object; at least one 1-D position is analyzed based on each detected touch related sensing information; and at least one 2-D position is analyzed by performing mutual-capacitance detection on each 1-D position; wherein the mutual-capacitance detection includes; providing a driving signal to one of these first sensors as a first signal source, and detecting variations in capactively coupled signals between the first signal source, these first 1-D sensors and the at least one external object using these first sensors;
orproviding a driving signal to one of these second sensors as a first signal source, and detecting variations in capactively coupled signals between the first signal source, these second 1-D sensors and the at least one external object using these second sensors; selecting a sensor provided with the driving signal from one of these sensors based on the at least one 1-D position; generating a third 1-D sensing information based on signals of these first sensors or the second sensors when each sensor selected based on the 1-D position is provided with the driving signal; analyzing at least one first 1-D position based on the third 1-D sensing information; selecting a sensor provided with the driving signal from one of these sensors based on each first 1-D position; generating a fourth 1-D sensing information based on signals of these first sensors or the second sensors when each sensor selected based on each first 1-D position is provided with the driving signal; analyzing at least one second 1-D position corresponding to each first 1-D position based on the fourth 1-D sensing information; and providing at least one 2-D position based on the at least one second 1-D position corresponding to each first 1-D position. - View Dependent Claims (2, 3, 4, 5)
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6. A device for position detection that neglects wide-area touches, comprising:
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a sensing device including a plurality of sensors including a plurality of first sensors and a plurality of second sensors, these first and second sensors intersecting each other at a plurality of intersecting points; and a controller for performing at least the following operations; obtaining a first 1-D sensing information from signals of the first sensors by self-capacitance detection; obtaining a second 1-D sensing information from signals of the second sensors by self-capacitance detection; a detected touch related sensing information is determined based on the range of each touch related sensing information on the first 1-D sensing information and the second 1-D sensing information, wherein each touch related sensing information corresponds to a touch or approach by at least one external object; at least one 1-D position is analyzed based on each detected touch related sensing information; and at least one 2-D position is analyzed by performing mutual-capacitance detection on each 1-D position; wherein the mutual-capacitance detection includes; providing a driving signal to one of these first sensors as a first signal source, and detecting variations in capactively coupled signals between the first signal source, these first 1-D sensors and the at least one external object using these first sensors;
orproviding a driving signal to one of these second sensors as a first signal source, and detecting variations in capactively coupled signals between the first signal source, these second 1-D sensors and the at least one external object using these second sensors; selecting a sensor provided with the driving signal from one of these sensors based on the at least one 1-D position; generating a third 1-D sensing information based on signals of these first sensors or the second sensors when each sensor selected based on the 1-D position is provided with the driving signal; analyzing at least one first 1-D position based on the third 1-D sensing information; selecting a sensor provided with the driving signal from one of these sensors based on each first 1-D position; generating a fourth 1-D sensing information based on signals of these first sensors or the second sensors when each sensor selected based on each first 1-D position is provided with the driving signal; analyzing at least one second 1-D position corresponding to each first 1-D position based on the fourth 1-D sensing information; and providing at least one 2-D position based on the at least one second 1-D position corresponding to each first 1-D position. - View Dependent Claims (7, 8, 9, 10)
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11. A method for position detection that neglects wide-area touches, comprising:
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providing a sensing device including a plurality of sensors including a plurality of first sensors and a plurality of second sensors, these first and second sensors intersecting each other at a plurality of intersecting points; obtaining a first 1-D sensing information from signals of the first sensors by self-capacitance detection; obtaining a second 1-D sensing information from signals of the second sensors by self-capacitance detection, wherein the first 1-D sensing information and the second 1-D sensing information include a plurality of dual differences, wherein each dual difference is generated based on three adjacent or non-adjacent sensors among these sensors; a detected touch related sensing information is determined based on the range of each touch related sensing information on the first 1-D sensing information and the second 1-D sensing information, wherein each touch related sensing information corresponds to a touch or approach by at least one external object; at least one 1-D position is analyzed based on each detected touch related sensing information; and at least one 2-D position is analyzed by performing mutual-capacitance detection on each 1-D position.
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12. A device for position detection that neglects wide-area touches, comprising:
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a sensing device including a plurality of sensors including a plurality of first sensors and a plurality of second sensors, these first and second sensors intersecting each other at a plurality of intersecting points; and a controller for performing at least the following operations; obtaining a first 1-D sensing information from signals of the first sensors by self-capacitance detection; obtaining a second 1-D sensing information from signals of the second sensors by self-capacitance detection, wherein the first 1-D sensing information and the second 1-D sensing information include a plurality of dual differences, wherein each dual difference is generated based on three adjacent or non-adjacent sensors among these sensors; a detected touch related sensing information is determined based on the range of each touch related sensing information on the first 1-D sensing information and the second 1-D sensing information, wherein each touch related sensing information corresponds to a touch or approach by at least one external object; at least one 1-D position is analyzed based on each detected touch related sensing information; and at least one 2-D position is analyzed by performing mutual-capacitance detection on each 1-D position.
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Specification