Patent ID: 8610698
Filing Date: 2013-12-17
Classification: G09G

Abstract:
1. A display device comprising: a display panel; and a power generating circuit which supplies an output voltage to the display panel, the power generating circuit including: a voltage raising circuit which generates the output voltage; a switching element which drives the voltage raising circuit; an on signal generating circuit which outputs a signal turning on the switching element to the switching element during an on period; an output voltage detection circuit which detects a polarity of the output voltage of the voltage raising circuit with respect to setting voltage, and outputs a code; and an on period determination unit which determines a length of the on period of a following cycle based on the code, wherein the on period determination unit determines the on period of the following cycle in such a way that the length of the on period increases or decreases by a predetermined width in accordance with a timing at which the code is the same in two consecutive cycles, and determines the on period of the following cycle in such a way that the length of the on period increases or decreases differently from the predetermined width in accordance with a timing at which the code differs in two consecutive cycles.