Patent ID: 8803862

Claim:
A system comprising: a liquid crystal display (LCD) panel comprising a pixel array having a plurality of unit pixels, wherein the plurality of unit pixels comprises a first set of unit pixels each having a pixel electrode forming a capacitive element with a first common electrode; a gamma adjustment logic configured to convert digital image data into a corresponding analog voltage signal; a common voltage generation circuit configured to provide a first common voltage signal to a first common voltage line coupled to the first common electrode; and a first resistor string configured to provide a first set of voltages to the gamma adjustment logic and a second set of voltages to the common voltage generation circuit, wherein the first resistor string comprises: a grounding point that provides a shared voltage reference for each of the gamma adjustment logic and the common voltage generation circuit; a first set of resistors coupled between the grounding point and a positive voltage source and defining a positive side of the first resistor string, wherein the positive side of the first resistor string is configured to provide positive voltages; and a second set of resistors coupled between the grounding point and a negative voltage source and defining a negative side of the first resistor string, wherein the negative side of the first resistor string is configured to provide negative voltages; wherein the common voltage generation circuit comprises a second resistor string having first and second end nodes, wherein a first end node receives a positive voltage selected from the positive side of the first resistor string, and wherein the second end node receives a negative voltage selected from the negative side of the first resistor string.