Described herein are D-\u03c0-A type sensitizers of the formula or having a novel central \u03c0-conjugated unit di-thiazolyl-benzodiazole and dye-sensitized electrodes including a substrate having an electrically conductive surface, an oxide semiconductor film formed on the conductive surface, and the above sensitizer of formula or, as specified above, supported on the film. A plurality of carts are inserted in nested arrangement into a load-in station. One of the two counts for each of the high and low pulses is divided. Alternatively, the array of pixels is based on an image, or a determinate array of pixels.