An extension structure of a capacitive touch bar

Abstract

A lengthening structure of a capacitive type touch bar is a large-length touch scroll bar formed by n capacitance polar plates arranged in a mutually staggered mode, the capacitance polar plates at two ends of the scroll bar are right triangles in shape, the capacitance polar plates in the middle are a parallelogram in shape, and all the capacitance polar plates are respectively connected to corresponding single electrode capacitance switching circuits. The capacitive type touch bar in the structure guarantees the touch flexibility, widens the effective touch range, and can be applied to a large-area touch screen.

Description

Technical field [0001] The invention relates to a capacitive touch strip, in particular to an extended structure using segmented single-electrode capacitive polar plates. Background technique [0002] As attached figure 2 Shown is a schematic diagram of the structure of a single-electrode capacitive touch strip in the prior art. The scroll bar can use 5 to 8 discrete sensor segments, each sensor segment is closely adjacent to the next sensor segment, and each segment needs to be connected to the capacitance-to-digital converter (CDC) of a single-electrode sensor, for example, to ADI A CIN input pin on the AD7147 or AD7148 single-electrode capacitance conversion chip. A human finger forms several capacitances with several sensor segments. When the user moves the finger along the scroll bar, more than one sensor segment is activated at the same time. The capacitance-digital conversion result of each segment is subjected to some interpolation operation to calculate the finger The ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the limitation of the length of the existing capacitive touch strip, the present invention provides an extended structure of a large-scale segmented capacitive touch strip

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