Patent ID: 8823621
Filing Date: 2014-09-02
Classification: G09G

Abstract:
1. A buffer generating an output signal, comprising: a pull-high module making the output signal to have a rising edge and comprising: a first switching unit coupled between a first operation voltage and a node, wherein the node is utilized to output the output signal, and during a first period, the first switching unit is turned on such that the first operation voltage is transmitted to the node making the output signal to have the rising edge; and a pull-low module making the output signal to have a falling edge, wherein the falling edge comprises a plurality of falling portions, and a slope of a first falling portion of the falling portions is different from a slope of a second falling portion of the falling portions, wherein the pull-low module comprises: a second switching unit coupled between the node and a second operation voltage, wherein during a second period, the second switching unit is turned on such that the second operation voltage is transmitted to the node; and a third switching unit coupled between the node and a third operation voltage, wherein during a third period, the third switching unit is turned on such that the third operation voltage is transmitted to the node, wherein the second operation voltage is equal to the third operation voltage, and the second operation voltage is less than the first operation voltage.