Abstract: An electronic device, a touch detection circuit and an update method for a reference value of a touch screen are provided. The update method includes: acquiring a temperature value of an environment of the touch screen; when determining that the acquired temperature value is less than a preset temperature threshold and determining that a continuously touched area exists in the touch screen, collecting N data frames of the continuously touched area; calculating N feature values of the N data frames; and updating N reference values corresponding to the N data frames according to the N feature values; wherein, N is greater than 1 and N is an integer. A difference between a reference value and a sensed value of the continuously touched area may not be decreased with a temperature rise due to the heat transferred by a touched object, thus point elimination at a low temperature is avoided.

Abstract: A method and apparatus for positioning a finger on a touch panel in a wet state and a touch detection apparatus are provided. The method includes: searching out suspect wet regions on the touch panel in a spacing coding manner, and determining a wet region from the suspect wet regions in a self-capacitive coding manner; traversing detection channels in the self-capacitive coding manner, and judging whether the detection channels satisfy a first condition; and if the detection channels in the wet region satisfy the first condition, determining a relative position relationship between a touch position of a finger and the wet region according to variations of feature data differences of the detection channels on the entire touch panel; or determining a relative position relationship between a touch position of a finger and the wet region according to variations of feature data differences of the detection channels outside the wet region.

Abstract: A method and apparatus for determining a reference value of a touch screen, and an electronic terminal thereof are provided. The method includes: determining a candidate reference value of a touch screen according to an original reference value and a reference fitting relationship of the touch screen, wherein the reference fitting relationship is determined according to the original reference value of the touch screen and a capacitance value of a capacitor node on the touch screen in a first frame; correcting the candidate reference value; and determining a stable reference value of the touch screen according to the corrected candidate reference value. According to embodiments of the present disclosure, the candidate reference value is closer to the actual capacitance reference, such that accuracy of the determined stable reference value is ensured as much as possible.

Abstract: A method and apparatus for positioning a finger on a touch panel in a wet state and a touch detection apparatus are provided. The method includes: searching out suspect wet regions on the touch panel in a spacing coding manner, and determining a wet region from the suspect wet regions in a self-capacitive coding manner; traversing detection channels in the self-capacitive coding manner, and judging whether the detection channels satisfy a first condition; and if the detection channels in the wet region satisfy the first condition, determining a relative position relationship between a touch position of a finger and the wet region according to variations of feature data differences of the detection channels on the entire touch panel; or determining a relative position relationship between a touch position of a finger and the wet region according to variations of feature data differences of the detection channels outside the wet region.

Abstract: A method and apparatus for determining a reference value of a touch screen, and an electronic terminal thereof are provided. The method includes: determining a candidate reference value of a touch screen according to an original reference value and a reference fitting relationship of the touch screen, wherein the reference fitting relationship is determined according to the original reference value of the touch screen and a capacitance value of a capacitor node on the touch screen in a first frame; correcting the candidate reference value; and determining a stable reference value of the touch screen according to the corrected candidate reference value. According to embodiments of the present disclosure, the candidate reference value is closer to the actual capacitance reference, such that accuracy of the determined stable reference value is ensured as much as possible.

Abstract: An electronic device, a touch detection circuit and an update method for a reference value of a touch screen are provided. The update method includes: acquiring a temperature value of an environment of the touch screen; when determining that the acquired temperature value is less than a preset temperature threshold and determining that a continuously touched area exists in the touch screen, collecting N data frames of the continuously touched area; calculating N feature values of the N data frames; and updating N reference values corresponding to the N data frames according to the N feature values; wherein, N is greater than 1 and N is an integer. A difference between a reference value and a sensed value of the continuously touched area may not be decreased with a temperature rise due to the heat transferred by a touched object, thus point elimination at a low temperature is avoided.