Touchscreen electrode configuration
View Patent ↗A touchscreen includes touchscreen electrode elements distributed across an active area of a substrate, and the touchscreen overlays a display. The touchscreen electrode elements are configured to avoid creating moiré patterns between the display and the touchscreen, such as angled, wavy, zig-zag, or randomized lines. In a further example, the electrodes form a mesh pattern configured to avoid moiré patterns.
1. An assembly, comprising:
a first mesh of touchscreen electrode elements distributed across at least an active area of a substrate, the first mesh configured to avoid visible moire patterns when overlaying a display having a regular repeating pattern of pixels, wherein the first mesh of touchscreen electrode elements has a first pattern; and
a second mesh of touchscreen electrode elements distributed across at least an active area of a substrate and overlapping the first mesh, the second mesh configured to avoid visible moiré patterns when overlaying a display having a regular repeating pattern of pixels, wherein the second mesh of touchscreen electrode elements has a second pattern, the second pattern being different than the first pattern;
wherein at least one of the first and second patterns comprises a series of wavy lines and the other of the first and second patterns comprises a plurality of substantially straight line segments so as to form a diamond-shaped pattern; and
wherein the first and second meshes are further configured to have the same pitch, such that mesh intersections in the first mesh occur in open spaces in the second mesh, and mesh intersections in the second mesh occur in open spaces in the first mesh.
2. The assembly of claim 1 , further comprising multiple electrode connections coupled to each mesh, and a plurality of breaks in the mesh separating adjacent electrodes from one another.
3. The assembly of claim 2 , wherein the multiple electrode connections are formed with the same pitch as the coupled mesh, such that a configuration of the connection between the electrode connections and the mesh remain consistent across the mesh.
4. The assembly of claim 1 , wherein:
the at least one of the first and second patterns that comprises a series of wavy lines comprises a mesh of wavy lines; and
the other of the first and second patterns that comprises a plurality of substantially straight line segments comprises a mesh of diamonds.
5. The assembly of claim 4 , wherein the mesh of diamonds comprises oblique diamonds.
6. The assembly of claim 1 , wherein at least one of the first and second meshes is broken along one or more zone edges to create multiple electrically separate zones within the mesh.
7. The assembly of claim 1 , wherein the touchscreen electrode elements of at least one of the first and second meshes comprise fine line metal elements of 10 or less micrometers in width.
8. The assembly of claim 1 , wherein the touchscreen electrode elements of at least one of the first and second meshes comprise at least one of angled, wavy, zig-zag, or randomized lines.
9. The assembly of claim 1 , wherein the touchscreen electrode elements of at least one of the first and second meshes have a line width 1/10 or less a sub-pixel size of the display.
10. The assembly of claim 1 , wherein a spacing between touchscreen line elements of at least one of the first and second meshes is randomized.
11. The assembly of claim 1 , wherein a distance between touchscreen line elements of at least one of the first and second meshes is at least 50 times the width of the lines.