Capacitive touch screen

Abstract

The invention relates to a capacitive touch screen. The capacitive touch screen comprises a glass layer, an ink layer is arranged on the position outside a visual window area of the glass layer, the ink layer at least comprises a first ink layer and a second ink layer or more ink layers, wherein the first ink layer and the second ink layer or the more ink layers are printed on glass sequentially. The edge of each ink layer is indented in the direction away from the visual window area of the touch screen and the indented length of each layer is larger than that of the last layer, and therefore a step-shaped structure is formed. According to the capacitive touch screen, a step printing mode is adopted by the background color ink layer printed on glass, the requirements for the color effect and the light shielding property of the appearance of the capacitive touch screen are met, the height difference between the glass visual window area and the printed ink layer is effectively reduced, the defect that bubbles are generated during the pasting sensor process of an induction layer is overcome, and product quality is improved.

Description

technical field [0001] The invention relates to a touch screen, in particular to a capacitive touch screen. Background technique [0002] At present, the back of the TP-pannel (touch screen glass) of the capacitive touch screen needs to be printed with high-saturation and high-brightness light-colored paint, especially when a large area of ​​light-colored paint is printed directly outside the window area of ​​the capacitive screen. Shading must be printed multiple times, and the thickness of the ink layer after printing generally exceeds 30um. The height difference between the ink layer and the window area, such as figure 1 As shown, when the sensor (sensing layer) is attached in this way, it will cause bubbles in the sensor, which will have a major impact on the appearance of the product, and the defect rate is 100%. The reason is that the thickness of the glass ink layer exceeds the thickness required for sensor bonding, so that when the OCA (optical adhesive) contacts ...

AI Technical Summary

Problems solved by technology

The height difference between the ink layer and the window area, such as figure 1 As shown, when the sensor (sensing layer) is attached in this way, it will cause bubbles in the sensor, which will have a significant impact on the appearance of the product, and the defect rate is 100%.

The reason is that the thickness of the glass ink layer exceeds the thickness required for sensor bonding, so that when the OCA (optical adhesive) contacts the ink layer, a large number of bubbles appear in the corners and cannot be eliminated, resulting in poor appearance of the product. If the number of ink printing layers is reduced to meet the According to the current solid OCA used, even OCA with unconventional thickness cannot effectively solve the problem of air bubbles, but will increase the material cost

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