Projection-type capacitive touch panel

Abstract

The invention provides a projection-type capacitive touch panel, which comprises a transparent substrate, a first conductive layer arranged on a surface of the transparent substrate, a first insulation layer which is provided with a plurality of first through holes, a second conductive layer arranged on the first insulation layer, a second insulation layer which covers the second conductive layer and is provided with a plurality of second through holes, and a third conductive layer, wherein a first sensor of the second conductive layer is electrically coupled to the first conductive layer through the first through holes; a pattern of the first conductive layer or the second conductive layer is the same as and overlapped with a pattern of the third conductive layer; and the third conductive layer is electrically coupled to the first conductive layer and the second conductive layer through the first through holes and the second through holes. By the projection-type capacitive touch panel, the third conductive layer is electrically coupled to the first conductive layer and the second conductive layer through the through holes in the first conductive layer and the second conductive layer; the impedance can be effectively reduced in a manner that a plurality of conductive layers are connected in parallel with one another; the number of resistive and capacitive (RC) loads is prevented from being increased; and a phenomenon that the touch sensitivity of a large-size touch panel is reduced because of the RC loads is avoided.

Description

technical field [0001] The invention relates to a touch panel, in particular to a projected capacitive touch panel. Background technique [0002] The current projected capacitive touch panel generally includes two layers of glass or film stacked up and down, one layer of glass is provided with a plurality of diamond-shaped sensors for detecting the X coordinate in the two-dimensional coordinate system, and the other A layer of glass is also provided with a plurality of diamond-shaped sensors for detecting the Y coordinate in the two-dimensional coordinate system. Each diamond-shaped sensor includes a pair of capacitors, and there is a symbiotic capacitance between each capacitor pair, and an electric field is generated on the surface of the sensor, which is projected to the outside of the screen through non-conductors such as glass or film. When the user directly touches the glass, the control chip will periodically read the state of each ITO electrode in the two-dimensiona...

AI Technical Summary

Problems solved by technology

However, as the size of the touch panel becomes larger and larger, the above structure will lead to an increase in the RC load, thereby affecting the touch sensitivity of the panel

In addition, designs such as ITO conductive bridges will also reduce the utilization of ITO

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