Ultra-thin mutual capacitance touch screen and combined ultra-thin touch screen

Abstract

An ultra-thin mutual capacitance touch screen and a combined ultra-thin touch screen composed of the touch screen, the ultra-thin mutual capacitance touch screen comprising a driving electrode group (100) electrically connected to an excitation signal source (800) of the touch screen peripheral and a sensing electrode group (200) electrically connected with the sensing control module (900) of the touch screen peripheral; the driving electrode group (100) includes flat plates formed of transparent conductive materials connected in series and / or in parallel The sensing electrode group (200) includes flat-plate-shaped sensing electrodes (210) formed of transparent conductive materials connected in series and / or in parallel; In the pair of adjacent driving electrodes (110) and sensing electrodes (210), at least one electrode generates the intrinsic mutual electric field (FB) with a plate area smaller than the area of ​​the electrode that generates the variable mutual electric field (FV). Plate area. The present invention makes the thickness of the touch screen thinner and ensures a higher effective permittivity.

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

If the driving line 210' and the sensing line 310' in the prior art are arranged on the same plane, that is, on the same layer, and the necessary insulation treatment is carried out between the driving line 210' and the sensing line 310' at the same time, although it can be adapted to the touch screen It is developing in the direction of ultra-thin, but its effective permittivity is low, and it needs to cooperate with complex external control circuits

Moreover, the electric field distribution of the single-layer touch screen is completely different from that of the layered touch screen. The methods and structures used in the prior art to increase the effective permittivity of the layered touch screen cannot be used in a single-layer touch screen. New methods and / or structures need to be designed to solve the problem of effectively increasing the effective permittivity within a single-layer mutual capacitance touch screen

In addition, the manufacturing process of the layered structure touch screen is complicated, which requires high positioning accuracy of the driving line 210' and the sensing line 310', and puts forward higher requirements for production equipment, materials, processes, and procedures, which not only increases the product cost cost, and to some extent affects the yield

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