Information input device and method with function of eliminating mutual interference among sensing signals

Abstract

The invention discloses an information input device and method with function of eliminating mutual interference among sensing signals, belonging to the field of computer peripheral equipment. According to the method disclosed by the invention, a capacitive touch control module is closed and an electromagnetic sensing module is started for performing electromagnetic scanning, or the electromagnetic sensing module is closed and the capacitive touch control module is started for performing capacitive scanning, so that the electromagnetic scanning and the capacitive scanning are performed in a time-division scanning and time-division working manner, thus, the problem of the mutual interference between electromagnetic sensing signals and capacitive touch signals is completely solved. According to the device disclosed by the invention, handwritten data information and hand touch data information are recognized by adopting a manner of combining an electromagnetic board and a capacitive touch control board, the positioning accuracy of the information input device in which an electromagnetic sensing technology and a capacitive touch control technology are applied is improved in the time-division scanning, and the touch control operation by a pen and fingers is realized on the same information input device.

Description

technical field [0001] The invention belongs to the field of computer peripheral equipment, and relates to an information input device with functions of electromagnetic touch input and capacitive touch input, in particular to an information input device and method capable of eliminating mutual interference between electromagnetic signals and capacitive signals. Background technique [0002] As a computer input device, the electromagnetic coordinate input device realizes computer information input through handwriting input by an electromagnetic board and a special electromagnetic pen. When the electromagnetic pen writes in the effective area of ​​the electromagnetic board, the electromagnetic board obtains the trajectory information and pressure information written by the electromagnetic pen, and transmits them to information processing equipment such as a computer. The electromagnetic coordinate input device can be used in circuit design, CAD design, graphic design, free dra...

AI Technical Summary

Problems solved by technology

However, electromagnetic induction technology and capacitive touch technology both complete the input of electromagnetic signals or capacitive signals through scanning coils. The touch screens using these two technologies must have mutual interference between electromagnetic signals and capacitive signals, thus affecting electromagnetic handwriting input. Combined with capacitive touch input for coordinate positioning and manipulation accuracy

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