TOUCH PANEL SYSTEM AND ELECTRONIC DEVICE
2 Assignments
0 Petitions
Accused Products
Abstract
Provided is a touch panel system (1) capable of reliably removing a wide variety of noises. The touch panel system (1) includes a main sensor (31) which detects a touch operation, a sub sensor (32) which does not detect a touch operation but detects a noise component, and a subtracting section (41) which subtracts, from an output signal of the main sensor (31), an output signal of the sub sensor (32). The subtracting section (41) performs a subtracting operation to remove a noise component from the output signal of the main sensor (31), thereby extracting a signal derived from the touch operation itself.
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Citations
53 Claims
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1-28. -28. (canceled)
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29. A touch panel system comprising,
a touch panel; - and
a touch panel controller for processing a signal supplied from the touch panel, the touch panel including (i) a main sensor section for detecting a touch operation performed with respect to the touch panel and (ii) a sub sensor section provided in a surface of the touch panel in which surface the main sensor section is provided, the touch panel controller including a subtracting section for (i) receiving a signal supplied from the main sensor section and a signal supplied from the sub sensor section and (ii) subtracting, from the signal supplied from the main sensor section, the signal supplied from the sub sensor section, the main sensor section being provided with a plurality of sense lines, the sub sensor section being provided with a sub sense line extending along a direction in which the sense lines extend, the subtracting section finding a first difference which is expressed by (Sn+1)−
Sn, the first difference corresponding to a difference between (i) a signal of a sense line Sn which is selected from the plurality of sense lines and (ii) a signal of a sense line Sn+1, which is one of two sense lines adjacent to the sense line Sn, the two sense lines being the sense line Sn+1 and a sense line Sn−
1 each of which is included in the plurality of sense lines,the subtracting section finding a second difference which is expressed by Sn−
(Sn−
1), the second difference corresponding to a difference between (i) the signal of the sense line Sn and (ii) a signal of the sense line Sn−
1, which is the other one of the two sense lines,the subtracting section finding a third difference, the third difference corresponding to a difference between (i) a signal of the sub sense line and (ii) a signal of a sense line adjacent to the sub sense line which sense line is included in the plurality of sense lines, the touch panel controller including an adding section for adding up the first difference, the second difference, and the third difference. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A touch panel system comprising,
a touch panel; - and
a touch panel controller for processing a signal supplied from the touch panel, the touch panel including a sensor section, the sensor section being provided with a plurality of sense lines and detecting a touch operation performed with respect to the touch panel, the touch panel controller including a subtracting section for (i) receiving signals from the sensor section and (ii) finding differences in signal between, among the sense lines, respective pairs of sense lines adjacent to each other, the touch panel system further comprising; drive lines provided so as to intersect the sense lines; a drive line driving circuit for driving the drive lines in parallel; and capacitances being formed between the sense lines and the drive lines, the subtracting section receiving output signals from the sense lines; and
finding differences between the capacitances on each of the drive lines in a direction in which the each of the drive lines extends, the differences being found as the differences in signal between the respective pairs of the sense lines adjacent to each other,the touch panel system further comprising; a decoding section for decoding the values of the differences between the capacitances, which differences are found by the subtracting section, the decoding being carried out in such a manner that an inner product of each of code sequences for driving the drive lines in parallel and each of difference output sequences of the sense lines, which difference output sequences correspond to the code sequences, is calculated. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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Specification