Capacitive type touch-control device and data transmitting method

Abstract

The invention relates to a capacitive type touch-control device and a data transmitting method. The capacitive type touch-control device comprises a first integrated circuit which is used for scanninginduction lines and a second integrated circuit which is used for operating data from the first integrated circuit. The data transmitting method comprises the steps: the first integrated circuit transmits the number of the first induction line with nonzero induction capability to the second integrated circuit, next transmits the number of the last induction line with nonzero induction capabilityto the second integrated circuit and finally transmits the induction capability of all the induction lines between the first induction line with nonzero induction capability and the last induction line with nonzero induction capability to the second integrated circuit. Because only the induction capability between the first induction capability nonzero induction line number and the last inductioncapability nonzero induction line number is transmitted, the transmission time can be greatly reduced, and therefore, the better integral imaging speed is obtained.

Description

technical field [0001] The invention relates to a capacitive touch device and a data transmission method applied to the capacitive touch device. Background technique [0002] In traditional applications, large-size capacitive touch screens use surface capacitive sensing technology, but surface capacitive sensing technology uses a set of currents flowing to each terminal of the screen to determine the position of the finger. When the number of fingers touching the touch panel is more than two fingers, the number of reported current groups is still one, so only one set of absolute coordinate positions can be identified. For example, only one set of X and Y parameters can be reported in a two-dimensional matrix. Therefore, the multi-finger touch function cannot be achieved. [0003] Although the All Points Addressable (APA) array capacitive sensing technology can achieve the function of multi-finger touch, it needs to charge and discharge each point sensor (Point Sensor) to F...

AI Technical Summary

Problems solved by technology

figure 1 It shows the AI-type array capacitive sensing technology traditionally applied to small-size touch panels, which includes a small-size touch panel 10 and an AI-type array capacitive touch IC 12 to scan the touch panel 10, with a maximum supportable Taking the AI-type array capacitive touch IC 12 that scans 22 sensing lines as an example, although it is applied to a small-sized touch panel 10 with 10 sensing lines TRX1-TRX10 and TRY1-TRY10 on the X-axis and Y-axis The imaging speed is not bad, but if the AI-type array capacitive touch IC 12 is to be applied to a large-size touch panel 14 with 40 sensing lines TRX1-TRX40 and TRY1-TRY40 on the X-axis and Y-axis respectively, if figure 2 As shown, it is necessary to increase the total number of sensing lines that can be scanned by the AI-type array capacitive touch IC 12. However, the time spent by the touch IC 12 on charging and discharging the capacitor each time accounts for the overall image acquisition speed of the touch panel application. The ratio is very large, that is to say, the imaging speed is mainly determined by each frame of the IC 12 (frame) charging and discharging the capacitance, so the method of increasing the number of scannable sensing lines applied to the large-size touch panel 14 will have a The very big disadvantage is that the imaging speed of the overall application will be seriously reduced, which will affect the performance of the application side.

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