Gamma voltage output circuit having the same DC current voltage input for liquid crystal display

1. A gamma voltage output circuit for a liquid crystal display, the gamma voltage output circuit comprising:

a plurality of operational amplifiers, each of the operational amplifiers comprising a high voltage input port, a low voltage input port, a non-inverting input port, an inverting input port, and an output port; and

a plurality of resistors;

wherein the high voltage input port of each operational amplifier connects to a same electrical source, the low voltage input port of each operational amplifier is grounded, the non-inverting input port of each operational amplifier receives a same direct-current voltage, the output port of each operational amplifier outputs a gamma voltage configured for driving the liquid crystal display and is grounded via two respective of the resistors connected in series, and a node between the two respective resistors connects to the inverting input port of the operational amplifier.

2. The gamma voltage output circuit as claimed in claim 1 , wherein the high voltage input port of each operational amplifier is grounded via a capacitor.

3. The gamma voltage output circuit as claimed in claim 1 , wherein the gamma voltage output circuit comprises fourteen of the operational amplifiers and twenty-eight of the resistors.

4. The gamma voltage output circuit as claimed in claim 1 , further comprising a voltage divider circuit, wherein the direct-current voltage is provided by the voltage divider circuit.

5. The gamma voltage output circuit as claimed in claim 4 , wherein the voltage divider circuit outputs a voltage of approximately 0.1 volts.

6. The gamma voltage output circuit as claimed in claim 4 , wherein the voltage divider circuit comprises two resistors connected in series between an electrical source and ground, and a node between the two resistors of the voltage divider circuit is an output port of the voltage divider circuit.

7. The gamma voltage output circuit as claimed in claim 6 , wherein the node between the two resistors of the voltage divider circuit is grounded via a capacitor, and the electrical source is grounded via a capacitor.

8. The gamma voltage output circuit as claimed in claim 1 , wherein the electrical source is an analog electrical source.

9. A gamma voltage output circuit for a liquid crystal display, the gamma voltage output circuit comprising:

a plurality of operational amplifiers, each of the operational amplifiers comprising a high voltage input port, a low voltage input port, a non-inverting input port, an inverting input port, and an output port; and

wherein the high voltage input ports of said operational amplifier share, in parallel, with one another a same electrical source which is operated with a common resistor assembly, the low voltage input port of each operational amplifier is grounded, the non-inverting input port of each operational amplifier receives a same direct-current voltage, the output port of each operational amplifier outputs a gamma voltage configured for driving the liquid crystal display and is grounded via a specific resistor assembly which is different from other resistor assemblies used with other amplifiers, and said specific resistor assembly connects to the inverting input port of the corresponding operational amplifier.

10. The gamma voltage output circuit as claimed in claim 9 , wherein the common resistor assembly includes two respective resistors, and an output port of said same electrical source connects to a node between said two respective resistors.

11. The gamma voltage output circuit as claimed in claim 9 , wherein said specific resistor assembly includes at least two respective resistors with a node therebetween connecting to the inverting input port the corresponding operational amplifier.