A system and method of medical imaging using a variable speed patient positioning table are provided. An internal voltage reference voltage generating part generates a reference voltage for an internal voltage using the current of the temperature-proportional current generating part and the current of the temperature-inverse proportional current generating part. The network interface transmits data to and receives data from the local computer network. Each row of the sub-pixel includes a gate line that drives the first sub-pixel and a gate line that drives the second sub-pixel. The indicator tab bears the name or image of the product.