Thin film positioning device

Abstract

The film locator for detecting the position of contact includes X film with the first X end and the second X end; Y film with the first Y end and the second Y end; the first Y switch coupled between the first Y end and the earth end; the second Y switch coupled between the second Y end and power source; the first X switch coupled between the first X end and the earth end; the second X switch coupled between the second X end and power source; the first X capacitor coupled between the first X end and the second X end; and the second Y capacitor coupled between the first Y end and the second Y end.

Description

(1) Technical field [0001] The present invention relates to a film positioning device, and in particular to a fast-response film positioning device. (2) Background technology [0002] Cursor positioning devices are widely used in man-machine interfaces to facilitate communication between users and electronic devices. The cursor positioning device is, for example, a mouse or a film positioning device or the like. The film positioning device includes two resistive films or capacitive films, and detects the coordinates of the point according to the point touched by the user. [0003] figure 1 It is the circuit diagram of the resistive film positioning device. The resistive membrane positioning device 100 includes a membrane 110 . The film 110 includes an X film and a Y film. The X film and the Y film are planar resistors and do not contact each other in a natural state. On the X film, the resistance value changes with the X coordinate, not with the Y coordinate; on the Y ...

AI Technical Summary

Problems solved by technology

However, sometimes the force of the user pressing the film positioning device is too small, which will make the impedance value of R_touch very large, thus prolonging the discharge time of the capacitor Cyp

If the discharge time of the capacitor Cyp is prolonged, the waiting time for detecting the next coordinate will be prolonged, thus causing the problem that the positioning device does not respond quickly enough

[0009] Similarly, when detecting the Y coordinate, the capacitor Cxp is charged to the level of the power supply Vcc. If the resistance R_touch is too large, the discharge time will be too long and the positioning device will not respond quickly enough.

[0010] Although reducing the capacitors Cxp, Cxm, Cyp, and Cym can speed up the response speed of the positioning device, the ability to block noise will be poor, making positioning inaccurate; increasing these capacitance values ​​will make the response of the positioning device too slow

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