Abstract: A display panel, a method for driving the display panel, and a display device are provided. In an embodiment, the display panel includes: a first substrate; a display dielectric layer located at a side of the first substrate; pixel electrodes and peek-proof electrodes, all of the pixel electrodes and the peek-proof electrodes being arranged between the first substrate and the display dielectric layer; and a light-shielding structural layer including a light-shielding structure and a hollow-out portion. In an embodiment, along a direction perpendicular to a plane of the display panel, the peek-proof electrodes overlap with the light-shielding structure, and the pixel electrodes overlap with the hollow-out portion; and the light-shielding structural layer is located at a side of the peek-proof electrodes adjacent to a light exit surface of the display panel.

Abstract: A method for counting single- or double-stranded polynucleotide molecules is provided. A plurality of double-stranded polynucleotide fragments is obtained from original single- or double-stranded polynucleotide molecules. The ends of the polynucleotide fragments can be modified to have overhangs suitable for ligation. Two single-stranded adaptors or one double-stranded polynucleotide linker are ligated to both ends of each of the double-stranded polynucleotide fragments to form single- or double-stranded circular polynucleotide molecules, which can be linearly amplified to form single-stranded nanoballs. The circular polynucleotide molecules before the amplification, or the single-stranded nanoballs obtained in the amplification, can be identified and quantified on a gene detection platform, thereby obtaining a counting of the original single- or double-stranded polynucleotide molecules.