What Is a Full Wave LED Rectifier?
A rectifier is an electrical device, which converts alternating current to direct current, a process known as rectification.
When just one diode is used to rectify AC (by blocking the negative or positive portion of the waveform) the difference between the term diode and the term rectifier is merely one of usage, e.g. the term rectifier describes a diode that is being used to convert AC to DC than is possible with just a single diode.