Touch panel
A touch panel includes dummy electrodes, disposed in a transmit electrode layer or a receive electrode layer whichever is below an isolation layer. In one embodiment, an anti-reflective layer includes at least one composite refractive-index three-layer structure. In another embodiment, the receive electrode layer is disposed below the isolation layer, and the receive electrode layer and the dummy electrodes are electrically coupled to a same electric potential.
1. A touch panel, comprising:
an anti-reflective layer including at least one composite refractive-index three-layer structure;
a transmit layer, an isolation layer and a receive layer, disposed below the anti-reflective layer, the isolation layer being disposed between the transmit layer and the receive layer; and
a plurality of dummy electrodes disposed in the transmit layer or the receive layer whichever is located below the isolation layer;
wherein the anti-reflective layer comprises, from top to bottom, a first low-refractive-index layer, a high-refractive-index layer and a second low-refractive-index layer, wherein a refractive index of the high-refractive-index layer is higher than refractive indices of the first low-refractive-index layer and the second low-refractive-index layer.
2. The touch panel of claim 1 , further comprising a transparent cover layer disposed above the anti-reflective layer.
3. The touch panel of claim 1 , further comprising a transparent substrate disposed below the transmit layer, the isolation layer and the receive layer.
4. The touch panel of claim 1 , wherein the first low-refractive-index layer has a thickness of about 10-200 μm, the high-refractive-index layer has a thickness of about 10-500 μm, and the second low-refractive-index layer has a thickness of about 10-500 μm.
5. The touch panel of claim 1 , wherein the first low-refractive-index layer, the high-refractive-index layer and the second low-refractive-index layer comprises silicon nitride (SiN x ) and silicon dioxide (SiO 2 ).
6. The touch panel of claim 1 , wherein the transmit layer or the receive layer whichever is located below the isolation layer comprises a plurality of electrode lines, wherein the dummy electrodes are disposed between adjacent electrode lines, and are disposed in a same layer as the electrode lines.
7. The touch panel of claim 1 , wherein the dummy electrode is patterned to result in a plurality of dummy sub-electrodes.
8. The touch panel of claim 7 , wherein gap between adjacent dummy sub-electrodes is less than 30 μm.