APPARATUS FOR DRIVING TOUCH PANEL AND DISPLAY APPARATUS COMPRISING THE SAME
First Claim
1. A touch panel driving apparatus comprising:
- a touch control unit generating a sensing control signal corresponding to a first or second sensing mode, and generating touch point information on the basis of input digital touch information, the first or second sensing mode being set for a touch panel which comprises a plurality of intersected transmitting lines and receiving lines; and
a touch sensing unit connected to the receiving lines, and generating the digital touch information on the basis of change of a capacitance between two transmitting lines and one receiving line or generating the digital touch information on the basis of change of a capacitance of each of the receiving lines to supply the digital touch information to the touch control unit, according to the sensing control signal.
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Accused Products
Abstract
Disclosed are a touch panel driving apparatus and a display device including the same, which lead to the enhancement of sensing sensitivity. The touch panel driving apparatus includes a touch control unit and a touch sensing unit. The touch sensing unit is connected to the receiving lines, and generates the digital touch information on the basis of change of a capacitance between two transmitting lines and one receiving line or generates the digital touch information on the basis of change of a capacitance of each of the receiving lines to supply the digital touch information to the touch control unit, according to the sensing control signal.
34 Citations
24 Claims
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1. A touch panel driving apparatus comprising:
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a touch control unit generating a sensing control signal corresponding to a first or second sensing mode, and generating touch point information on the basis of input digital touch information, the first or second sensing mode being set for a touch panel which comprises a plurality of intersected transmitting lines and receiving lines; and a touch sensing unit connected to the receiving lines, and generating the digital touch information on the basis of change of a capacitance between two transmitting lines and one receiving line or generating the digital touch information on the basis of change of a capacitance of each of the receiving lines to supply the digital touch information to the touch control unit, according to the sensing control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A touch panel driving apparatus comprising a sensing circuit which generates a touch signal on the basis of capacitance change of a receiving line when a touch panel is touched, the sensing circuit comprises:
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a first input terminal connected to one receiving line which intersects two transmitting lines receiving mutually inverted first and second excitation signals; a second input terminal receiving a reference voltage signal; a node connector connecting the first input terminal to one of first and second output nodes and connecting the second input terminal to the other output node, in response to a switching control signal corresponding to a reset section, sensing section, and digital conversion section of a line sensing period; and a differential amplifier initialized during the reset section according to the reset control signal, and generating the touch signal which comprises mutually inverted first and second differential amplification signals according to an input signal which is selectively inputted to an inverting input terminal and a non-inverting input terminal through the node connector, during the sensing section and digital conversion section. - View Dependent Claims (14, 15)
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16. A touch panel driving apparatus comprising a sensing circuit which generates a touch signal on the basis of capacitance change of a receiving line when a touch panel is touched, the sensing circuit comprises:
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a first input terminal connected to one receiving line; a second input terminal receiving an excitation signal; a node connector connecting the first input terminal to one of first and second output nodes and connecting the second input terminal to the other output node, in response to a switching control signal corresponding to a reset section, sensing section, and digital conversion section of a line sensing period; and a differential amplifier initialized during the reset section according to the reset control signal, and generating the touch signal which comprises mutually inverted first and second differential amplification signals according to an input signal which is selectively inputted to an inverting input terminal and a non-inverting input terminal through the node connector, during the sensing section and digital conversion section. - View Dependent Claims (17, 18)
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19. A display device comprising:
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a display panel; a display panel driver displaying an image on the display panel; a touch panel disposed on the display panel or formed inside the display panel; and a touch panel driving apparatus driving the touch panel, wherein the touch panel driving apparatus comprises; a touch control unit generating a sensing control signal corresponding to a first or second sensing mode, and generating touch point information on the basis of input digital touch information, the first or second sensing mode being set for a touch panel which comprises a plurality of intersected transmitting lines and receiving lines; and a touch sensing unit connected to the receiving lines, generating the digital touch information on the basis of change of a capacitance between two transmitting lines and one receiving line or generating the digital touch information on the basis of change of a capacitance of each of the receiving lines to supply the digital touch information to the touch control unit, according to the sensing control signal. - View Dependent Claims (20, 21, 22)
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23. A display device comprising:
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a display panel; a display panel driver displaying an image on the display panel; a touch panel disposed on the display panel or formed inside the display panel; and a touch panel driving apparatus comprising a sensing circuit which generates a touch signal on the basis of capacitance change of a receiving line when the touch panel is touched, wherein the sensing circuit comprises; a first input terminal connected to one receiving line which intersects two transmitting lines receiving mutually inverted first and second excitation signals; a second input terminal receiving a reference voltage signal; a node connector connecting the first input terminal to one of first and second output nodes and connecting the second input terminal to the other output node, in response to a switching control signal corresponding to a reset section, sensing section, and digital conversion section of a line sensing period; and a differential amplifier initialized during the reset section according to the reset control signal, and generating the touch signal which comprises mutually inverted first and second differential amplification signals according to an input signal which is selectively inputted to an inverting input terminal and a non-inverting input terminal through the node connector, during the sensing section and digital conversion section.
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24. A display device comprising:
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a display panel; a display panel driver displaying an image on the display panel; a touch panel disposed on the display panel or formed inside the display panel; and a touch panel driving apparatus comprising a sensing circuit which generates a touch signal on the basis of capacitance change of a receiving line when the touch panel is touched, wherein the sensing circuit comprises; a first input terminal connected to one receiving line; a second input terminal receiving an excitation signal; a node connector connecting the first input terminal to one of first and second output nodes and connecting the second input terminal to the other output node, in response to a switching control signal corresponding to a reset section, sensing section, and digital conversion section of a line sensing period; and a differential amplifier initialized during the reset section according to the reset control signal, and generating the touch signal which comprises mutually inverted first and second differential amplification signals according to an input signal which is selectively inputted to an inverting input terminal and a non-inverting input terminal through the node connector, during the sensing section and digital conversion section.
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Specification