Condenser type touch screen

Abstract

A capacitive touch screen comprises at least one transparent insulated layer and at least one transparent electrode conducting layer, wherein, the transparent electrode conducting layer is arranged on the transparent insulated layer, and comprises a plurality of electrodes. The touch screen is characterized in that the edge of each electrode on the transparent electrode conducting layer is in the shape of a saw tooth in a visual area of the capacitive touch screen, so that the bending of the electrode edge can be utilized, to enable the edge orientation of the electrodes with smaller line width on the capacitive touch screen and the clearance between electrodes to incline with the arrange direction of pixel point arrays of a display device at a certain angle. Therefore, as far as the light interference is concerned, the slit direction is changed so that the generated interference fringes are not evident or disappear, the light interference in the visual area of the touch area is effectively weakened or avoided, and the better visual effect is possessed by the display device.

Description

technical field [0001] The invention relates to an input device for interaction between man and machine, in particular to a capacitive touch screen. Background technique [0002] Capacitive touch screens have been widely used in various electronic products, such as mobile phones, mp4, POS terminals and so on. The capacitive touch screen has a high transmittance, does not need to use force to apply pressure, can resist harsh external environments, has a long service life, and is more user-friendly in operation. [0003] Existing capacitive touch screens are usually provided with one or more transparent electrode conductive layers (usually one or two transparent electrode conductive layers; when provided with a transparent electrode conductive layer, on the transparent insulating layer One transparent electrode conductive layer is set on one plane; when there are two transparent electrode conductive layers, one transparent electrode conductive layer can be set respectively on...

AI Technical Summary

Problems solved by technology

The conductive layer of the transparent electrode is composed of multiple electrodes, and the graphic shapes of the electrodes are mostly designed as polygons such as rectangles, regular hexagons, and rhombuses. When the touch screen is applied to a dot-matrix display device, the edges of these electrodes will always exist in contact with the dot matrix. In the case that the array direction (X direction or Y direction) of the pixel points of the dot matrix display device is parallel or approximately parallel (that is, the angle between the edge of the electrode and the array direction of the pixel points of the dot matrix display device is very small), since the pixel points of the dot matrix display device There will be a certain gap distance between the capacitive touch screen, so when the light comes out from the pixel point of the dot matrix display device (the pixel point is equivalent to the light source) and passes through the electrode with a small line width of the touch screen or the gap between the electrodes At this time, the electrodes with smaller line width or the gaps between the electrodes are equivalent to many slits, which will meet the condition of interference of the sub-wave vibration plane, and the light will become coherent light, which will cause light interference on the touch surface (that is, the light exit surface), resulting in Interference fringes, especially when the edge of the electrode is parallel to the array direction of the pixels of the dot-matrix display device, the interference phenomenon of light will be more obvious, which will seriously affect the display effect of the dot-matrix display device

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