Abstract: A touch screen includes a power supply unit, configured to supply power; an image capturing unit, configured to capture images; a storage unit, configured to temporarily store screen content; an image display unit, configured to display the screen content; and a processing unit, coupled to the power supply unit, the image capturing unit, the storage unit, and the image display unit, configured to execute an image display method. The image display method includes capturing an image of an area in front of the touch screen; determining a position of a speaker according to the image, and determining a blocked area and an unblocked area according to the position; and displaying screen content related to the blocked area in the unblocked area.

Abstract: Methods and systems to build and utilize a search infrastructure are described. The system generates index information components in real-time based on a database that is time-stamped. The system updates index information at a plurality of query node servers based on the index information components. A query engine receives a search query from a client machine and identifies search results based on the query and the index information. The system communicates the search results, over the network, to the client machine.