Mutual capacitance touch screen and combination mutual capacitance touch screen

Abstract

The invention relates to a mutual capacitance-type touch screen and a combined mutual capacitance-type touch screen which is combined by the mutual capacitance-type touch screen. The mutual capacitance-type touch screen comprises a driving layer (200) and a sensing layer (300), wherein the driving layer (200) comprises drive electrodes (210) which are alternately distributed on the same plane; the sensing layer (300) comprises sensing electrodes (310) which are alternately distributed on the same plane; the sensing electrodes (310) are distributed in areas in the sensing layer (300) and the driving layer (200) facing to mutual gap areas of the drive electrodes (210); and the drive electrodes (210) and the sensing electrodes (310) are filled into a touch area (110) of the touch screen together. The space positions of the drive electrodes and the sensing electrodes are not opposite, thereby improving the proportion of capacitances CT formed between tops of the drive electrodes and the sensing electrodes in a mutual capacitance C and effectively increasing the effective inductive capacity of the mutual capacitance-type touch screen.

Description

technical field [0001] The invention relates to a touch-sensing input device, in particular to a touch-input device using mutual capacitance as a sensing device. Background technique [0002] A touch screen is a touch-sensing input device that is widely used now. According to the principle of touch sensing, touch screens in the prior art include resistive touch screens, capacitive touch screens, surface infrared touch screens and the like. Among them, the resistive touch screen has been popular for many years because of its low cost, easy implementation, and simple control. Recently, capacitive touch screens have been welcomed by the public for their high light transmittance, wear resistance, resistance to environmental temperature changes, environmental humidity changes, long life, and the ability to realize advanced complex functions such as multi-touch. [0003] The use of capacitance changes as a sensing principle has a long history. For a touchscreen to work effectiv...

AI Technical Summary

Problems solved by technology

[0005] like Figure 11 As shown, when the prior art touch screen is touched, the capacitance C between the driving line 210' and the bottom of the sensing line 310' B Not affected by touch, since the bottom of the sensing line 310' is directly opposite to the driving line 210', the capacitance C B It has a larger proportion in the mutual capacitance C, so that the effective permittivity is lower

The effective capacitance of the mutual inductance touch screen in the prior art generally can only reach about 30%, resulting in the low signal-to-noise ratio of the touch screen, requiring the design of a complex sensing control circuit to accurately determine the touch of the human body or a special touch device on the touch screen , increasing the design and manufacturing cost of the touch screen

Images