Patent ID: 9207785
Filing Date: 2015-12-08
Classification: G06F,G09G

Abstract:
1. A voltage generator, comprising: a DC/DC converter to output a first voltage during a first period of a frame period, the DC/DC converter being connected to a first power voltage source and to a second power voltage source lower than the first power voltage source; a first transistor coupled between the DC/DC converter and an output terminal, the first transistor to be turned on during the first period; a second transistor coupled between the output terminal and a third voltage source, the third voltage source to supply a third voltage lower than the first voltage, and the second transistor to be turned on during a third period of the frame period; and a voltage controller coupled to the output terminal, the voltage controller to limit a voltage of the output terminal, wherein the DC/DC converter has a normal state to generate the first voltage by a switching operation of the DC/DC converter during the first period using the first and second power voltage sources, and has a non-driving state to reduce power consumption by limiting the switching operation of the DC/DC converter during remaining period of the frame except the first period, and wherein the DC/DC converter includes fourth and fifth transistors coupled in series between the first and second power voltage sources, the fourth and fifth transistors alternately turned on and turned off during the first period, and respectively turned off and turned on during the remaining period of the frame except the first period.