Capacitive touch with driving conductive strips closer to an external object and without rear shielding layer
First Claim
1. A detection method for a capacitive touch sensitive display, comprising:
- providing a capacitive touch sensitive display for operated by at least one external conductive object, including;
a double ITO (DITO) structure comprising;
a first layer, comprising a plurality of exposed driving conductive strips which receive a driving signal during mutual capacitive detection;
a second layer, comprising a plurality of exposed sensing conductive strips that provide a plurality of mutual capacitive coupling signals during mutual capacitive detection;
an insulating layer disposed between said first layer and said second layer;
wherein said first layer is closer to an external conductive object than said second layer; and
wherein said plurality of driving conductive strips intersect with said plurality of sensing conductive strips;
a display, wherein said DITO structure is directly disposed thereon;
sending said driving signal to at a first driving conductive strip of said plurality of driving conductive strips continuously;
generating a sensing information based on said mutual capacitive coupling signals provided by said plurality of sensing conductive strips each time when said driving signal is sent to said first driving conductive strip, wherein each value of said sensing information is a dual difference value between a first difference value and a second difference value, wherein said first difference value is a difference between a first and second sensing conductive strips among three neighboring conducting strips and said second difference value is a difference between a third and said second sensing conductive strips among said three neighboring sensing conductive strips;
wherein two zero-crossings in said sensing information corresponds to a touch or proximity of an external conductive object and a zero-crossing is between a positive value and a negative value.
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Abstract
The present invention provides a mutual capacitive multi-touch screen. The conductive strip pattern allows that, when a touch range of each external conductive object on the mutual capacitive multi-touch screen is larger than a predetermined condition, capacitive coupling between each external conductive object and first conductive strip is greater than capacitive coupling between each external conductive object and second conductive strip, such that the proportion of a driving signal flowing out of the first conductive strip via at least one first external conductive object in the external conductive objects and into the second conductive strip via at least one second external conductive object in the external conductive objects decreases as the number of second external conductive objects increases.
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Citations
21 Claims
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1. A detection method for a capacitive touch sensitive display, comprising:
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providing a capacitive touch sensitive display for operated by at least one external conductive object, including; a double ITO (DITO) structure comprising; a first layer, comprising a plurality of exposed driving conductive strips which receive a driving signal during mutual capacitive detection; a second layer, comprising a plurality of exposed sensing conductive strips that provide a plurality of mutual capacitive coupling signals during mutual capacitive detection; an insulating layer disposed between said first layer and said second layer; wherein said first layer is closer to an external conductive object than said second layer; and wherein said plurality of driving conductive strips intersect with said plurality of sensing conductive strips; a display, wherein said DITO structure is directly disposed thereon; sending said driving signal to at a first driving conductive strip of said plurality of driving conductive strips continuously; generating a sensing information based on said mutual capacitive coupling signals provided by said plurality of sensing conductive strips each time when said driving signal is sent to said first driving conductive strip, wherein each value of said sensing information is a dual difference value between a first difference value and a second difference value, wherein said first difference value is a difference between a first and second sensing conductive strips among three neighboring conducting strips and said second difference value is a difference between a third and said second sensing conductive strips among said three neighboring sensing conductive strips; wherein two zero-crossings in said sensing information corresponds to a touch or proximity of an external conductive object and a zero-crossing is between a positive value and a negative value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A capacitive touch sensitive display, comprising:
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a double ITO (DITO) structure comprising; a first layer, comprising a plurality of exposed driving conductive strips which receive a driving signal during mutual capacitive detection; a second layer, comprising a plurality of exposed sensing conductive strips that provide a plurality of mutual capacitive coupling signals during mutual capacitive detection; an insulating layer disposed between said first layer and said second layer; and an insulating surface layer disposed on said first layer to receive approaching or touching of at least one external conductive object; wherein said first layer is closer to an external conductive object than said second layer; and wherein said plurality of driving conductive strips intersect with said plurality of sensing conductive strips; a display, wherein said DITO structure is directly disposed thereon;
generating a sensing information based on said mutual capacitive coupling signals provided by said plurality of sensing conductive strips each time when said driving signal is sent to said first driving conductive strips, wherein each value of said sensing information is a dual difference value between a first difference value and a second difference value, wherein said first difference value is a difference between a first and second sensing conductive strips among three neighboring conducting strips and said second difference value is a difference between a third and said second sensing conductive strips among said three neighboring sensing conductive strips;wherein two zero-crossings in said sensing information corresponds to a touch or proximity of an external conductive object and a zero-crossing is between a positive value and a negative value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A capacitive touch sensitive display, comprising:
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a double ITO (DITO) structure comprising; a first layer, comprising a plurality of exposed driving conductive strips which receive a driving signal during mutual capacitive detection; a second layer, comprising a plurality of exposed sensing conductive strips that provide a plurality of mutual capacitive coupling signals during mutual capacitive detection; wherein when a touch area of each external conductive object on said capacitive touch sensitive display is larger than a predetermined threshold, capacitance between each external conductive object and said plurality of driving conductive strips is greater than capacitance between each external conductive object and said plurality of sensing conductive strips; generating a sensing information based on said mutual capacitive coupling signals provided by said plurality of sensing conductive strips each time when said driving signal is sent to said first driving conductive strips, wherein each value of said sensing information is a dual difference value between a first difference value and a second difference value, wherein said first difference value is a difference between a first and second sensing conductive strips among three neighboring conducting strips and said second difference value is a difference between a third and said second sensing conductive strips among said three neighboring sensing conductive strips; wherein two zero-crossings in said sensing information corresponds to a touch or proximity of an external conductive object and a zero-crossing is between a positive value and a negative value. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification