Patent ID: 6977705

Claim:
A structure for reducing the diffraction effect in periodic electrode arrangements, comprising: a plurality of first electrodes and a plurality of second electrodes, wherein the first electrodes and the second electrodes are periodically disposed and one of the two or both are transparent electrodes; multiple layers of transparent dielectric layers having different diffraction indexes, formed in predetermined thicknesses between the plurality transparent electrodes, wherein the diffraction index and the thickness of the transparent dielectric layers and the transparent electrodes satisfy the following equation: 0.8 n ed d ed ≦n 1 d 1 +n 2 d 2 + . . . +n x d x ≦1.2 n ed d ed wherein n 1 is the diffraction index of the first dielectric layer, n 2 is the diffraction index of the second dielectric layer, n x is the diffraction index of the x th dielectric layer, n ed is the diffraction index of the transparent electrode, d 1 is the thickness of the first dielectric layer from a region defined between planes defined by the transparent electrode, d 2 is the thickness of the second dielectric layer from a region defined between planes defined by the transparent electrode, d x is the thickness of the first x th dielectric layer from a region defined between planes defined by the transparent electrode, d ed is the thickness of the transparent electrode, and d ed is equal to the sum of d 1 , d 2 , . . . , and d x .