A method and system for sorting online advertisements to enable users of online advertising networks, auctions, merchants, etc. Image display of the display device and the external light are synchronously controlled through a synchronization signal generated by a control module in the display device. The compression algorithm may allow customization of compression parameters, such as a quantization factor, code block size, number of transform levels, reversible or irreversible compression, a desired compression ratio with a variable bit rate output, a desired fixed bit rate output with a variable compression rate, progression order, output format, or visual weighting. The contact hole is at least partially filled with a conductive stud that is in electrical contact with the conductive feature and exposed at the top surface of the insulator layer so as to define a structure.