The present invention is to provide a light emitting device capable of obtaining a certain luminance without influence by the temperature change, and a driving method thereof. In particular, the present invention provides benzodiazepine compounds, and structurally and functionally related compounds, and methods of using such compounds as therapeutic agents to treat a number of conditions associated with the faulty regulation of the processes of programmed cell death, autoimmunity, inflammation, hyperproliferation, vascular abnormalities, and the like. The enantiomer is then racemized and recycled by reaction with a catalytic amount of a base, preferably with t-butoxide. Access by the game developer to a library of software objects is also provided via the wide area network. Each lower leg portion extends down from its corresponding upper leg portion in a reverse bend.