MUTUAL CAPACITANCE TOUCH SENSING DEVICE AND ITS SINE WAVE MEASURING METHOD
First Claim
1. A sine wave measuring method used in a mutual capacitance touch sensing device comprising a touch sensing panel having arranged therein a plurality of driving lines extending along a first axis in a parallel manner and a plurality of sensing lines extending along a second axis in a parallel manner and crossed over said driving lines to form a plurality of crossover points, a driver and sensor module, said driver and sensor module comprising a selective circuit electrically connected with said driving lines, a measurement unit electrically connected with said sensing lines and a sine wave generator electrically connected with said selective circuit and said measurement unit and having a lookup table loaded therein, and a processor electrically connected with said measurement unit, the sine wave measuring method comprising the steps of:
- (A01) said sine wave generator using a clock to generate multiple sine waves according to said lookup table, and then transmitting generated sine waves to said selective circuit;
(A02) said selective circuit transmitting said sine waves to said driving lines of said touch sensing panel in a proper order;
(A03) each said sine wave at each said driving line being capacitive-coupled to the respective said sensing line through the respective said crossover point to produce a respective sensing signal at the respective said crossover point; and
(A04) said measurement unit scanning the generated sensing signal at each said sensing line subject to said lookup table in said sine wave generator, so as to obtain the generated sensing signals at the respective said crossover points.
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Abstract
A mutual capacitance touch sensing device and a sine wave measuring method is disclosed. A sine wave generator of a driver and sensor module of a touch sensing panel of the mutual capacitance touch sensing device uses a clock to generate multiple sine waves according to a lookup table being loaded therein, enabling a selective circuit to transmit the sine waves to driving lines of the touch sensing panel in a proper order so that each sine wave at each driving line is capacitive-coupled to a respective sensing line through a respective crossover point to produce a respective sensing signal, and then a measurement unit scans the generated sensing signal subject to the lookup table in the sine wave generator and then provides the measured signals to a processor for processing.
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Citations
14 Claims
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1. A sine wave measuring method used in a mutual capacitance touch sensing device comprising a touch sensing panel having arranged therein a plurality of driving lines extending along a first axis in a parallel manner and a plurality of sensing lines extending along a second axis in a parallel manner and crossed over said driving lines to form a plurality of crossover points, a driver and sensor module, said driver and sensor module comprising a selective circuit electrically connected with said driving lines, a measurement unit electrically connected with said sensing lines and a sine wave generator electrically connected with said selective circuit and said measurement unit and having a lookup table loaded therein, and a processor electrically connected with said measurement unit, the sine wave measuring method comprising the steps of:
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(A01) said sine wave generator using a clock to generate multiple sine waves according to said lookup table, and then transmitting generated sine waves to said selective circuit; (A02) said selective circuit transmitting said sine waves to said driving lines of said touch sensing panel in a proper order; (A03) each said sine wave at each said driving line being capacitive-coupled to the respective said sensing line through the respective said crossover point to produce a respective sensing signal at the respective said crossover point; and (A04) said measurement unit scanning the generated sensing signal at each said sensing line subject to said lookup table in said sine wave generator, so as to obtain the generated sensing signals at the respective said crossover points. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mutual capacitance touch sensing device comprising:
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a touch sensing panel comprising a plurality of driving lines extending along a first axis in a parallel manner, and a plurality of sensing lines extending along a second axis in a parallel manner and crossed over said driving lines to form a plurality of crossover points; a driver and sensor module, said driver and sensor module comprising a selective circuit electrically connected with said driving lines, a measurement unit electrically connected with said sensing lines, a sine wave generator electrically connected with said selective circuit and adapted for generating sine waves according to a lookup table being loaded therein and a measurement unit electrically connected with said sine wave generator and adapted for scanning each sensing signal generated at the crossover point at each said sensing line subject to said lookup table in said sine wave generator; and a processor electrically connected with said measurement unit. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification