Correction circuit used for improving bounce misjudgment of key

Abstract

The invention discloses a correction circuit used for improving bounce misjudgment of a key. The correction circuit comprises a comparison unit, a predetermined voltage generation unit and a control unit. The comparison unit has a first input end, a second input end and an output end; and the first input end is used for receiving a triggering signal generated by the key. The predetermined voltagegeneration unit is electrically connected to the second input end and used for generating a first predetermined voltage. The control unit is electrically connected to the output end. The control unitdetermines whether a polling mechanism is executed or not according to a comparison result of the comparison unit, and generates a confirmation signal when a polling result of the polling mechanism ismaintained at a specific level, wherein the confirmation signal is used for an external processor to confirm that the key is really triggered.

Description

technical field [0001] The present invention provides a correction circuit, especially a correction circuit which can be used to improve the misjudgment of key bouncing. Background technique [0002] A computer mouse is generally provided with a left button and a right button, and the user generates a control signal different from the navigation module by clicking the left and right buttons. The left button and right button of the mouse are common button mechanisms. The user presses the button cap to trigger the generation of a control signal. After the user removes the external force, the key cap returns to the original height position by the restoring force of the elastic element. After frequent and long-term use, the elastic element of the button will have elastic fatigue, which is easily affected by the force of environmental vibration, so that the keycap still jumps up and down when it is not pressed by the user. At this time, the mouse will misjudge that the button is ...

AI Technical Summary

Problems solved by technology

After frequent and long-term use, the elastic element of the button will have elastic fatigue, which is easily affected by the force of environmental vibration, so that the keycap still jumps up and down when it is not pressed by the user. At this time, the mouse will misjudge that the button is triggered.

The traditional solution is to use the polling mechanism to judge whether the button is actually triggered or just bounced accidentally. However, the long polling judgment time will cause the mouse to freeze during operation, and shortening the polling judgment time will also cause the button to be triggered. bouncing misjudgment; therefore, how to design a correction technology that can shorten the polling judgment time and reduce bouncing misjudgment is one of the development goals of related institutions and industries

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