Mutual-capacitance embedded-type touch screen

Abstract

A mutual-capacitance embedded-type touch screen is provided. The embedded-type touch screen comprises a touch control unit array formed by a plurality of touch control units. The mutual-capacitance embedded-type touch screen is characterized in that each touch control unit is formed by a pixel electrode layer, a first dielectric layer, a second dielectric layer, a common electrode layer, a third dielectric layer and a thin film transistor array which are stacked in order. The common electrode layer of each touch control unit is divided into a driving area, a first suspension area, a second suspension area, a first shielding area and a second shielding area, the first shielding area and the second shielding area are respectively formed at two sides, which are back to each other, of the driving area, the first suspension area is formed at one side, of the first shielding area, being far from the driving area, and the second suspension area is formed at one side, of the second shielding area, being far from the driving area. With respect to the mutual-capacitance embedded-type touch screen, the capacitance value of a scan line on the juncture of adjacent touch control units is approximate to that of a scan line which is not positioned on the juncture, and the case that obvious stripes occur on the juncture of adjacent touch control units can be effectively avoided.

Description

technical field [0001] The present invention generally relates to the structure of an in-cell touch screen, and more specifically, relates to a mutual-capacitance in-cell (Incell) touch screen. Background technique [0002] With the continuous development of electronic science and technology, capacitive touch screens (hereinafter referred to as "capacitive screens") are widely used in various electronic devices, such as: smart phones, tablet computers, game consoles, personal digital assistants and other electronic devices with touch screens. equipment. The existing capacitive screen structures include external capacitive screens represented by G+G, GF, GFF, OGS, etc., and embedded capacitive screens represented by Oncell and Incell. [0003] In recent years, people are pursuing more and more light and thin user experience, and there has been a situation where OGS, Oncell, and Incell are competing with each other. Due to the unique advantages in the production process, Ince...

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Problems solved by technology

[0004] figure 1 Shows the planar layout of the embedded capacitive screen of the existing Incell structure, such as figure 1 As shown, 1 is the driving signal supply wiring, 2 is the touch sensing electrode, 3 is the common signal supply wiring, figure 2 shown as figure 1 The floor plan of two adjacent touch units in , by figure 2 It can be seen that there is a gap at the junction of two adjacent touch units, and the scanning line at the junction does not overlap with the common electrode layer, resulting in a low capacitance value, while the scanning line at the non-junction and the common electrode layer do not overlap. There is overlap in the common electrode layer, and its capacitance value is high, which leads to a decrease in the uniform performance of the embedded capacitive screen of the existing Incell structure in terms of display, that is, at the junction of two adjacent touch units Visible streaks appear

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