Capacitive touch panel sensor synchronized with display driving operation and touch panel display device having the same
First Claim
1. A capacitive touch panel sensor, comprising:
- a plurality of driving-lines in a first direction;
a plurality of sensing-lines in a second direction;
a scan signal generator to generate a scan signal corresponding to at least one scan pulse, and to output the scan signal to the driving-lines; and
a capacitance detector to receive a capacitance sensing signal output from the sensing-lines, and to detect a touched location based on the capacitance sensing signal,wherein the scan signal generator outputs the scan signal during first noise avoidance time periods, each first noise avoidance time period being in a respective horizontal time period of a display driving operation of a display panel,wherein the capacitance detector receives the capacitance sensing signal during the first noise avoidance time periods,wherein each of the first noise avoidance time periods is between a first time point and a second time point, the first time point being a time point elapsed by a predetermined first time from a time point at which a horizontal synchronization signal is changed from an active state to an inactive state, the second time point being a time point at which the horizontal synchronization signal is changed from an inactive state to an active state or a time point before the time point at which the horizontal synchronization signal is changed from an inactive state to an active state, andwherein the first noise avoidance time periods are within a first range, the first range being a period in which a data signal applied to the display panel is not changed when the display panel performs the display driving operation.
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Abstract
A capacitive touch panel sensor includes a plurality of driving-lines in a first direction, a plurality of sensing-lines in a second direction, a scan signal generator configured to generate a scan signal corresponding to at least one scan pulse, and to output the scan signal to the driving-lines, and a capacitance detector configured to receive a capacitance sensing signal output from the sensing-lines, and to detect a touched location based on the capacitance sensing signal, wherein the scan signal generator is configured to output the scan signal during first noise avoidance time periods, each first noise avoidance time period being in a respective horizontal time period of a display driving operation, and wherein the capacitance detector is configured to receive the capacitance sensing signal during the first noise avoidance time periods.
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Citations
19 Claims
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1. A capacitive touch panel sensor, comprising:
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a plurality of driving-lines in a first direction; a plurality of sensing-lines in a second direction; a scan signal generator to generate a scan signal corresponding to at least one scan pulse, and to output the scan signal to the driving-lines; and a capacitance detector to receive a capacitance sensing signal output from the sensing-lines, and to detect a touched location based on the capacitance sensing signal, wherein the scan signal generator outputs the scan signal during first noise avoidance time periods, each first noise avoidance time period being in a respective horizontal time period of a display driving operation of a display panel, wherein the capacitance detector receives the capacitance sensing signal during the first noise avoidance time periods, wherein each of the first noise avoidance time periods is between a first time point and a second time point, the first time point being a time point elapsed by a predetermined first time from a time point at which a horizontal synchronization signal is changed from an active state to an inactive state, the second time point being a time point at which the horizontal synchronization signal is changed from an inactive state to an active state or a time point before the time point at which the horizontal synchronization signal is changed from an inactive state to an active state, and wherein the first noise avoidance time periods are within a first range, the first range being a period in which a data signal applied to the display panel is not changed when the display panel performs the display driving operation. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A capacitive touch panel sensor, comprising:
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a plurality of driving-lines in a first direction; a plurality of sensing-lines in a second direction; a scan signal generator to generate a scan signal corresponding to at least one scan pulse, and to output the scan signal to the driving-lines; and a capacitance detector to receive a capacitance sensing signal output from the sensing-lines, and to detect a touched location based on the capacitance sensing signal, wherein the scan signal generator outputs the scan signal during noise avoidance time periods, each noise avoidance time period being in a respective vertical blanking time of a display driving operation, wherein the capacitance detector receives the capacitance sensing signal during the noise avoidance time periods, wherein each of the noise avoidance time periods is between a first time point and a second time point, the first time point being a time point elapsed by a predetermined time from a time point at which a data enable signal is changed from an active state to an inactive state, and the second time point being a time point at which the data enable signal is changed from an inactive state to an active state or a time point before the time point at which the data enable signal is changed from an inactive state to an active state, and wherein the noise avoidance time periods are within a range, the range being a period in which a data signal applied to the display panel is not changed when the display panel performs the display driving operation. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A capacitive touch panel sensor, comprising:
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a plurality of driving-lines in a first direction; a plurality of sensing-lines in a second direction; a scan signal generator to generate a scan signal corresponding to at least one scan pulse, and to output the scan signal to the driving-lines; and a capacitance detector to receive a capacitance sensing signal output from the sensing-lines, and to detect a touched location based on the capacitance sensing signal, wherein the scan signal generator outputs the scan signal during data stop time periods generated at a predetermined cycle when a display device performs a display driving operation, wherein the capacitance detector receives the capacitance sensing signal during the data stop time periods, and wherein the data stop time periods are generated by a frame memory device or a line memory device of the display device. - View Dependent Claims (14, 15)
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16. A touch panel display device, comprising:
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a display panel to perform a display driving operation; a touch screen panel to perform a touch detecting operation, the touch screen panel including a plurality of driving-lines in a first direction, and a plurality of sensing-lines in a second direction; a display driver to control the display panel; and a touch screen panel controller to control the touch screen panel to perform the touch detecting operation during noise avoidance time periods, the touch screen panel controller including; a scan signal generator to generate a scan signal corresponding to at least one scan pulse, and to output the scan signal to the driving-lines, and a capacitance detector to receive a capacitance sensing signal output from the sensing-lines, and to detect a touched location based on the capacitance sensing signal, wherein the scan signal generator outputs the scan signal during data stop time periods generated at a predetermined cycle when a display device performs a display driving operation, wherein the capacitance detector receives the capacitance sensing signal during the data stop time periods, and wherein the data stop time periods are generated by a frame memory device or a line memory device of the display device. - View Dependent Claims (17, 18, 19)
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Specification