Electronic device having touch sensor and driving method thereof
First Claim
Patent Images
1. A display device comprising:
- a plurality of touch electrodes; and
a touchscreen driving circuit coupled to the plurality of touch electrodes, the touchscreen driving circuit having a plurality of switches,wherein in a normal display mode of the display device, the touchscreen driving circuit senses touch via the plurality of touch electrodes using self capacitance touch sensing; and
wherein in a sleep mode of the display device, the touchscreen driving circuit short circuits together a first set of the touch electrodes through the switches and senses touch via the plurality of touch electrodes using mutual capacitance touch sensing by driving a first touch driving signal to the first set of the touch electrodes that are shorted circuited together through the switches.
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Abstract
A display device that comprises a plurality of touch electrodes and a touchscreen driving circuit coupled to the plurality of touch electrodes. In a normal display mode of the display device, the touchscreen driving circuit senses touch via the plurality of touch electrodes using self capacitance touch sensing. In a sleep mode of the display device, the touchscreen driving circuit senses touch via the plurality of touch electrodes using mutual capacitance touch sensing.
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Citations
21 Claims
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1. A display device comprising:
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a plurality of touch electrodes; and a touchscreen driving circuit coupled to the plurality of touch electrodes, the touchscreen driving circuit having a plurality of switches, wherein in a normal display mode of the display device, the touchscreen driving circuit senses touch via the plurality of touch electrodes using self capacitance touch sensing; and wherein in a sleep mode of the display device, the touchscreen driving circuit short circuits together a first set of the touch electrodes through the switches and senses touch via the plurality of touch electrodes using mutual capacitance touch sensing by driving a first touch driving signal to the first set of the touch electrodes that are shorted circuited together through the switches. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A display device comprising:
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a plurality of touch electrodes; and a touchscreen driving circuit coupled to the plurality of touch electrodes, the touchscreen driving circuit having a plurality of switches to selectively short circuit together at least a first set of the touch electrodes; wherein in a normal display mode of the display device, the touchscreen driving circuit senses touch via the plurality of touch electrodes using self capacitance touch sensing; and wherein in a sleep mode of the display device, the touchscreen driving circuit short circuits the first set of the touch electrodes together through the switches and senses touch via the first set of short circuited touch electrodes by driving a first touch driving signal to the first set of the touch electrodes that are short circuited together through the switches. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of operation in a display device that includes a plurality of touch electrodes, comprising:
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in a normal display mode of the display device, sensing touch via the plurality of touch electrodes using self capacitance touch sensing; and in a sleep mode of the display device, sensing touch via the plurality of touch electrodes using mutual capacitance touch sensing by shorting circuiting together a first set of the touch electrodes through a plurality of switches and driving a first touch driving signal to the first set of the touch electrodes that are shorted circuited together through the switches. - View Dependent Claims (14, 15)
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16. A method of operation in a display device that includes a plurality of touch electrodes and a plurality of switches to selectively short circuit together at least a first set of the touch electrodes, comprising:
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in a normal display mode of the display device, sensing touch via the plurality of touch electrodes using self capacitance touch sensing; and in a sleep mode of the display device, short circuiting the first set of the touch electrodes together through the switches and sensing touch via the first set of short circuited touch electrodes by driving a first touch driving signal to the first set of the touch electrodes that are short circuited together through the switches. - View Dependent Claims (17, 18, 19, 20)
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21. A display device comprising:
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a plurality of touch electrodes including a first set of the touch electrodes and a second set of the touch electrodes; a plurality of sensing lines including a first set of the sensing lines and a second set of the sensing lines; and a touchscreen driving circuit coupled to the first set of the touch electrodes and the second set of the touch electrodes and the touchscreen driving circuit including a first multiplexer and a second multiplexer; wherein the first set of the touch electrodes is coupled to the first set of the sensing lines respectively and the second set of the touch electrodes is coupled to the second set of the sensing lines respectively, wherein the first multiplexer is capable of short-circuiting the first set of the touch electrodes together through the first set of the sensing lines in a sleep mode of the display device and the touchscreen driving circuit is capable of driving the first set of the touch electrodes through the first set of the sensing lines in the sleep mode of the display device, wherein the second multiplexer is capable of short-circuiting the second set of the touch electrodes together through the second set of the sensing lines in the sleep mode of the display device and the touchscreen driving circuit is capable of sensing the second set of the touch electrodes through the second set of the sensing lines in the sleep mode of the display device.
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Specification