A sensor, comprising: a plurality of touch units, each touch unit of the plurality of touch units comprises: a plurality of driving electrodes and a plurality of sensing electrodes; some of the plurality of driving electrodes in each touch unit are arranged in a first direction, and some others of the plurality of driving electrodes in each touch unit are arranged in a second direction different from the first direction; some of the plurality of sensing electrodes in each touch unit are arranged in the first direction, and some others of the plurality of sensing electrodes in each touch unit are arranged in the second direction; and wherein the plurality of driving electrodes in each touch unit are electrically connected to each other to form a large driving electrode, and the plurality of sensing electrodes in each touch unit are electrically connected to each other to form a large sensing electrode; a capacitor is formed between the large driving electrode and the large sensing electrode; wherein locations arranged for the plurality of driving electrodes and the plurality of sensing electrodes are related to locations of illuminants, and wherein the illuminants are in a display layer, which is stacked under a touch layer provided with the sensor or is embedded with the plurality of driving electrodes and the plurality of sensing electrodes; wherein the plurality of driving electrodes and the plurality of sensing electrodes are non-transparent layers, the plurality of driving electrodes and the plurality of sensing electrodes are arranged in spaces or locations corresponding to spaces on the touch layer, each space is located between two neighboring illuminants; wherein each of the spaces or each of the locations is arranged with one driving electrode and one sensing electrode; wherein a width of a respective driving electrode of the plurality of driving electrodes or a width of a respective sensing electrode of the plurality of sensing electrodes is smaller than or equal to half a width of a respective space of the spaces. some of the plurality of driving electrodes in each touch unit are arranged in a first direction, and some others of the plurality of driving electrodes in each touch unit are arranged in a second direction different from the first direction; some of the plurality of sensing electrodes in each touch unit are arranged in the first direction, and some others of the plurality of sensing electrodes in each touch unit are arranged in the second direction; and wherein the plurality of driving electrodes in each touch unit are electrically connected to each other to form a large driving electrode, and the plurality of sensing electrodes in each touch unit are electrically connected to each other to form a large sensing electrode; a capacitor is formed between the large driving electrode and the large sensing electrode; wherein locations arranged for the plurality of driving electrodes and the plurality of sensing electrodes are related to locations of illuminants, and wherein the illuminants are in a display layer, which is stacked under a touch layer provided with the sensor or is embedded with the plurality of driving electrodes and the plurality of sensing electrodes; wherein the plurality of driving electrodes and the plurality of sensing electrodes are non-transparent layers, the plurality of driving electrodes and the plurality of sensing electrodes are arranged in spaces or locations corresponding to spaces on the touch layer, each space is located between two neighboring illuminants; wherein each of the spaces or each of the locations is arranged with one driving electrode and one sensing electrode; wherein a width of a respective driving electrode of the plurality of driving electrodes or a width of a respective sensing electrode of the plurality of sensing electrodes is smaller than or equal to half a width of a respective space of the spaces.