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The manufacturing method of mutual capacitance touch screen
- Jan 30, 2019 -

How is the mutual capacitive touch screen made?

The invention unveiled a capacitive touch screen, touch screen including the flexible circuit board, touch chips and array configuration of multiple sensor unit, mentioned in each row of the sensing unit in series form line unit, described line unit the number of rows for even greater than 2 N, N the described unit with N + N / 2 lines through the same scan line after line unit described in parallel connection to described the flexible circuit board, N is positive integer and no greater than N / 2, mentioned in each column of the sensing unit in series and connected to described the flexible circuit board, through described the flexible circuit board will be described in the sensing unit electrical connection to the touch chips.Not peer unit sensing unit parallel to each other and through public fuses both connected to the flexible circuit board, namely through public will lead the flexible circuit board line connect to multiple units at the same time, reduce the amount of lead, save the border around the touch screen space, narrow frame design, and both can scanning at the same time, improve the efficiency of scanning.

Touch screen (TP, touchpanel) is a kind of can receive contact or finger input signal induction type liquid crystal display device, such as when the operator contact with the graphic buttons on the screen, the screen of the tactile feedback system according to the program of pre-programmed drive all kinds of connecting device, can be used to replace the mechanical button panel, and liquid crystal display screen by creating vivid audio effect.Mutual capacitive touch screen is in the glass panel surface with Indium tin oxide (Ι Τ 0, Indium tin oxide) material, vertical and lateral electrode electrode, where the intersection of two sets of electrodes can form capacitance, when touch detection, mutual capacitance screen all horizontal and vertical electrode respectively, according to the touch before and after the change of capacitance, respectively, to determine the transverse and longitudinal coordinates, then form the touch of plane coordinates.

Existing technology, the mutual capacitive touch sensor module is composed of multiple identical sensing unit array, each row of the sensing unit on both ends of the sending end need to separate lead connected to the flexible circuit board, led to a touch screen on both sides of the lead to take up too much border, a lot of space layout, reduce the flexibility of touch screen structure design, is not conducive to narrow the borders of the panel design is used;In addition, the method of progressive scanning sensing unit has low scanning efficiency, consumes a lot of time and occupies pixel charging time.