A stereoscopic image display includes a liquid crystal display panel including a plurality of pixels, each of which is divided into a main pixel unit and an switchable black stripe, a data driving circuit, a gate driving circuit, and a 3D control voltage generation circuit, which supplies AC voltages, of which phases are sequentially shifted, to a plurality of 3D control lines in a 3D mode. A synchronization schema may be adopted to allow an application to save configuration details for a synchronization operation in a format which may easily be discovered by other applications without the need of a registrationde-registration mechanism. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. A discrete battery module also enables easy replacement of the battery without disturbing the transmitter, which is highly desirable. As the luminance signal contains an ambient luminance only, accurate ambient luminance for the lamp can be therefore acquired.