Measures for providing timer services in a network including a cluster of nodes responsible for providing timer services to clients. A photosensitive black material layer is formed on the common electrode to fill the first intervals between the color filters, and a mask is provided over the photosensitive black material layer. By comparing the threshold values and the differential amplitude values, it can be found whether the amplitude of the received signal is changed. Evaluation of criteria may be rule based and automatic, and selection of a third-party financial service provider may be immediate and real time.