CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Taiwanese Application Serial Number 108116785, filed on May 15, 2019, which is herein incorporated by reference.

BACKGROUND

Field of Invention

The present invention relates to a touch display device. More particularly, the present invention relates to a touch display device with touch point correction function.

Description of Related Art

The projective capacitive technique is usually utilized in the field of touch display. The projective capacitive technique includes self capacitive technology and mutual capacitive technology. In the self capacitive technology, when the user's finger touches the touch panel, it is equivalent to connecting a finger capacitor in parallel. When the finger touches the touch panel, the capacitance will be increased. However, the distance between conductive materials also can determine the capacitance. Therefore, when the touch display device is impacted or dropped to the ground, the distance between the conductive materials in the touch display device will be deformed. It is caused that the capacitance is changed, and thus the misjudgments of touch point or the abnormal capacitance are happened.

SUMMARY

The invention provides a touch display device. The touch display device includes a touch detecting circuit and a processor. The processor is electrically coupled to the touch detecting circuit. The touch detecting circuit is configured to detect a first touch signal and a second touch signal. The processor is configured to record a first time point when the first touch signal is received, and record a second time point when the second touch signal is received. The processor is configured to calculate a time difference between the first time point and the second time point, if the time difference is larger than or equal to a threshold, the processor is configured to adjust the first touch signal and the second touch signal according to a baseline.

The invention provides a touch display device. The touch display device includes a touch detecting circuit and a processor. The processor is electrically coupled to the touch detecting circuit. The touch detecting circuit is configured to detect a touch signal. The processor is configured to determine whether a capacitance of the touch signal is less than a capacitance threshold, if the capacitance of the touch signal is less than the capacitance threshold, the processor is configured to adjust the touch signal according to a baseline.

The invention provides a touch display device. The touch display device includes a touch detecting circuit and a processor. The processor is electrically coupled to the touch detecting circuit. The processor is configured to receive a first touch signal in a first time point and receive a second touch signal in a second time point via the touch detecting circuit, wherein the second time point is later than the first time point; when the touch detecting circuit detects that the second touch signal is released, the processor is configured to adjust a first capacitance corresponding to the first touch signal and a second capacitance corresponding to the second touch signal according to a baseline, to form a first reference capacitance and a second reference capacitance.

It is to be understood that both the foregoing general description and the following detailed description are by examples, and are intended to provide further explanation of the invention as claimed.

