Digitalization index device and its function keys capacitance compensation method

Abstract

Disclosed are a digital indicator and a capacitance compensation method for the function key of the indicator; the digital indicator comprises a magnetic field generation circuit, a microprocessor, a group of function key capacitors, a group of switches and a group of function key compensation capacitors; the microprocessor comprises a vibration circuit, a group of switch feet which can be used as switches, a group of detection feet which can detect the potential changes, and a readable and writable non-volatile memorizer; one end of each function key capacitor and one end of each function key compensation capacitor are connected with the switch feet of the microprocessor, while the other ends are in short connection; the non-volatile memorizer stores the compensation relationships between the function key capacitors and the function key compensation capacitors; the microprocessor detects the switching movement of the switches, controls the switching movements of the switch feet according to the compensation relationships, and controls the corresponding function key capacitors to be communicated with the function key compensation capacitors. The invention enables the frequency adjustment of the indicator to be improved as digital frequency adjustment so as to decrease the parallel-connected capacitors to reduce errors made by man-made judgment.

Description

technical field [0001] The invention relates to an indicator device, in particular to a digitized indicator device and a function key capacitance compensation method thereof. Background technique [0002] The technology of the digital board has long been known, and its main purpose is as a computer drawing or handwriting input auxiliary device, such as a tablet computer, which is the best portrayal, and has been widely used in graphic arts, machinery, 3D animation drawing and other fields. Using digital boards for product design can achieve higher work efficiency. The digital tablet needs to be used in conjunction with its matching pointer. Its technology is mainly to use a pen pointer to generate an electromagnetic field. The magnetic field is magnetically coupled to the digital tablet, and the coordinates are obtained after calculation and sent to the computer. [0003] In the current existing design, the circuit design of the pen-type indicator usually adopts inductance-...

AI Technical Summary

Problems solved by technology

In this production process, it takes a long time, the number of parallel capacitors is large, there are mistakes in human judgment, and the temperature change caused by the use of electric soldering iron in production will affect the capacitance value and cause frequency drift.

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