An emergency caller location system uses enterprise Wireless Local Area Network location systems to provide more accurate location information on an emergency caller. An overdrive device modifies a backlight duty signal according to a current-frame backlight duty signal and a previous-frame backlight duty signal. , diabetes and hypercholesterolemia, compositions containing such compounds, and therapeutic methods that include the administration of such compounds, as well as to processes and intermediates useful for preparing such compounds. A source area is formed on channel areas, which are located between the first and second gate areas in the drift layer. With the hooks and the engaging groove, the contact member and the housing are connected together.