Touch control display device

Abstract

The invention provides a touch control display device which comprises a display module and a touch control module which are arranged in a stacked mode, and the touch control module comprises a first touch control electrode layer, a second touch control electrode layer and an insulating layer located between the first touch control electrode layer and the second touch control electrode layer whichare arranged in a stacked mode. The touch control display device is provided with a touch control display area and a binding area located on one side of the touch control display area, a plurality ofwelding pads are arranged in the binding area, and the welding pads are arranged on the second touch control electrode layer; the first touch control electrode layer comprises a first touch electrodeand a first lead connected to the first touch electrode; the second touch control electrode layer comprises a second touch control electrode and a second lead connected to the second touch electrode;the first lead extends to the binding area from the first touch electrode and extends to the second touch control electrode layer through a via hole formed in the insulating layer to be electrically connected with the welding pad, and the second lead extends to the binding area from the second touch electrode to be electrically connected with the welding pad.

Description

technical field [0001] The present application relates to the display field, in particular to a touch display device. Background technique [0002] Organic light-emitting diode On-cell touch display (OLED On-cell Touch) technology, also known as DOT technology (Direct On-Cell Touch), integrates organic light-emitting diode display panels and touch structures. Panel) technology has the advantages of higher transmittance, bending resistance, and thinness, and has become the future trend of flexible OLED display. This technology is to directly use a low-temperature process (temperature less than or equal to 90°C) to make a touch structure on the Thin-Film Encapsulation (TFE) of the OLED panel, so as to realize the integration of the OLED and the Touch structure. The structure of a known DOT touch display panel is as follows: figure 1 As shown, the OLED panel 10 , the TFE encapsulation layer 20 , the insulating layer 30 and the touch module 40 are stacked in sequence. The tou...

AI Technical Summary

Problems solved by technology

This technology brings the following defects: the width of the bridging conduction point at the bridging position of the driving electrode 41 or the sensing electrode 42 is larger than the metal width at other positions, resulting in differences in the optical characteristics of the pixel light emission and the non-bridging position; the higher the touch accuracy , the more touch electrodes, the more metal bridging points, the more dry etching via sites in the process, and the etching depth of the display area and the bonding (pad-bonding) area are not the same, in order to ensure the uniformity of the via hole depth To realize the conduction of the touch electrodes is a great challenge to the low-temperature dry etching process, and the risk of touch failure is high. Especially in the high-generation panel line process, the risk of the low-temperature dry etching process has a greater impact on the yield; The structural strength of the bridging electrodes 43 and the via holes 31 is weak, and the risk of an open circuit in the folding screen is high

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