Device and method for addressing unintended offset voltage when driving display panel

1. A processing system, comprising:

a plurality of output terminals configured to be connected to data lines of a display panel;

a plurality of output amplifiers configured to output a plurality of drive voltages having the same polarity; and

first switch circuitry configured to connect a first output terminal of the plurality of output terminals to a selected one of the plurality of output amplifiers,

wherein the first switch circuitry comprises:

a first connection state in which

the first output terminal is connected to a first output amplifier of the plurality of output amplifiers, the first connection state to output a first drive voltage of the first output amplifier at the first output terminal, and

a second output terminal of the plurality of output terminals is connected to a second output amplifier of the plurality of output amplifiers; and

a second connection state in which

the first output terminal is connected to the second output amplifier, the second connection state to output a second drive voltage of the second output amplifier at the first output terminal, and

the second output terminal is connected to the first output amplifier, and

wherein the first drive voltage and the second drive voltage have a same polarity.

2. The processing system according to claim 1 , wherein the first switch circuitry further comprises a third connection state in which the first output terminal is connected to a third output amplifier of the plurality of output amplifiers.

3. The processing system of claim 1 , wherein the first switch circuitry further comprises a third connection state in which the first output terminal is connected to a third output amplifier of the plurality of output amplifiers and the second output terminal is connected to a fourth output amplifier of the plurality of output terminals.

4. The processing system of claim 3 , wherein the plurality of output terminals comprises a third output terminal connected to a same output amplifier of the plurality of output amplifiers in the first connection state and the third connection state of the first switch circuitry.

5. The processing system of claim 1 , wherein the first switch circuitry is further configured to switch connections between the plurality of output terminals and the plurality of output amplifiers in response to selection of display lines of the display panel to be driven.

6. A processing system, comprising:

a plurality of output terminals configured to be connected to data lines of a display panel;

a plurality of output amplifiers configured to output a plurality of drive voltages having the same polarity; and

first switch circuitry configured to:

connect a first output terminal of the plurality of output terminals to a selected one of the plurality of output amplifiers;

connect a first output amplifier of the plurality of output amplifiers to the first output terminal during an overlapping period when a first display line of the display panel is driven in a first vertical sync period; and

connect a second output amplifier of the plurality of output amplifiers to the first output terminal during an overlapping period when the first display line of the display panel is driven in a second vertical sync period,

wherein the first switch circuitry comprises:

a first connection state in which the first output terminal is connected to the first output amplifier, the first connection state to output a first drive voltage of the first output amplifier at the first output terminal; and

a second connection state in which the first output terminal is connected to the second output amplifier, the second connection state to output a second drive voltage of the second output amplifier at the first output terminal, and

wherein the first drive voltage and the second drive voltage have a same polarity.

7. The processing system of claim 6 , wherein the first switch circuitry is further configured to connect a third output amplifier of the plurality of output amplifiers to the first output terminal during an overlapping period when the first display line is driven in a third vertical sync period.

8. A processing system, comprising:

a plurality of output terminals configured to be connected to data lines of a display panel;

a plurality of output amplifiers configured to output a plurality of drive voltages having the same polarity;

first switch circuitry configured to connect a first output terminal

of the plurality of output terminals to a selected one of the plurality of output amplifiers; and

a plurality of intermediate nodes configured to receive a plurality of grayscale voltages,

wherein each of the output amplifiers comprises:

an amplifier circuit comprising two input terminals; and

second switch circuitry configured to connect a selected one of the two input terminals to an output of the amplifier circuit and connect the other of the two input terminals to one of the plurality of intermediate nodes,

wherein the first switch circuitry comprises:

a first connection state in which the first output terminal is connected to a first output amplifier of the plurality of output amplifiers, the first connection state to output a first drive voltage of the first output amplifier at the first output terminal; and

a second connection state in which the first output terminal is connected to a second output amplifier of the plurality of output amplifiers, the second connection state to output a second drive voltage of the second output amplifier at the first output terminal, and

wherein the first drive voltage and the second drive voltage have a same polarity.

9. The processing system of claim 8 , wherein the second switch circuitry is configured to be switched between a first connection state and a second connection state of the second switch circuitry in response to selection of display lines of the display panel to be driven,

wherein, in the first connection state of the second switch circuitry, a first input terminal of the two input terminals is connected to the output of the amplifier circuit and a second input terminal of the two input terminals is connected to the one of the plurality of intermediate nodes, and

wherein, in the second connection state of the second switch circuitry, the second input terminal is connected to the output of the amplifier circuit and the first input terminal is connected to the one of the plurality of intermediate nodes.

10. The processing system of claim 9 , wherein the first switch circuitry comprises:

a third connection state in which the first output terminal is connected to the first output amplifier;

a fourth connection state in which the first output terminal is connected to the second output amplifier; and

a fifth connection state in which the first output terminal is connected to a third output amplifier of the plurality of output amplifiers, and

wherein the second switch circuitry is configured to be switched between the first connection state and the second connection state of the second switch circuitry while the first switch circuitry is maintained in one of the third connection state, the fourth connection state, and the fifth connection state.

11. A processing system, comprising:

a plurality of output terminals configured to be connected to data lines of a display panel;

a plurality of output amplifiers configured to output a plurality of drive voltages having the same polarity;

a plurality of digital-analog converters (DACs) configured to generate grayscale voltages to be supplied to the plurality of output amplifiers;

first switch circuitry configured to connect a first output terminal of the plurality of output terminals to a selected one of the plurality of output amplifiers; and

second switch circuitry configured to connect the plurality of DACs to the plurality of output amplifiers based on connections between the plurality of output terminals and the plurality of output amplifiers,

wherein the first switch circuitry comprises:

a first connection state in which the first output terminal is connected to a first output amplifier of the plurality of output amplifiers, the first connection state to output a first drive voltage of the first output amplifier at the first output terminal; and

a second connection state in which the first output terminal

is connected to a second output amplifier of the plurality of output amplifiers, the second connection state to output a second drive voltage of the second output amplifier at the first output terminal, and

wherein the first drive voltage and the second drive voltage have a same polarity.

12. A display device, comprising:

a display panel comprising a plurality of data lines; and

a processing system comprising:

a plurality of output terminals configured to be connected to the plurality of data lines;

a plurality of output amplifiers configured to output a plurality of drive voltages, respectively, the drive voltages having the same polarity; and

first switch circuitry configured to connect a first output terminal of the plurality of output terminals to a selected one of the plurality of output amplifiers,

wherein the first switch circuitry comprises:

a first connection state in which

the first output terminal is connected to a first output amplifier of the plurality of output amplifiers, the first connection state to output a first drive voltage of the first output amplifier at the first output terminal, and

a second output terminal of the plurality of output terminals is connected to a second output amplifier of the plurality of output amplifiers; and

a second connection state in which

the first output terminal is connected to the second output amplifier, the second connection state to output a second drive voltage of the second output amplifier at the first output terminal, and

the second output terminal is connected to the first output amplifier, and

wherein the first drive voltage and the second drive voltage have a same polarity.

13. A display device, comprising:

a display panel comprising a plurality of data lines; and

a processing system comprising:

a plurality of output terminals configured to be connected to the plurality of data lines;

a plurality of output amplifiers configured to output a plurality of drive voltages, respectively, the drive voltages having the same polarity; and

first switch circuitry configured to:

connect a first output terminal of the plurality of output terminals to a selected one of the plurality of output amplifiers;

connect a first output amplifier of the plurality of output amplifiers to the first output terminal during an overlapping period when a display line is driven in a first vertical sync period; and

connect a second output amplifier of the plurality of output amplifiers to the first output terminal during an overlapping period when the display line is driven in a second vertical sync period,

wherein the first switch circuitry comprises:

a first connection state in which the first output terminal is connected to the first output amplifier, the first connection state to output a first drive voltage of the first output amplifier at the first output terminal; and

a second connection state in which the first output terminal is connected to the second output amplifier, the second connection state to output a second drive voltage of the second output amplifier at the first output terminal, and

wherein the first drive voltage and the second drive voltage have a same polarity.

14. The display device of claim 13 , wherein the first switch circuitry is further configured to connect a third output amplifier of the plurality of output amplifiers to the first output terminal during an overlapping period when the display line is driven in a third vertical sync period.

15. A display device, comprising:

a display panel comprising a plurality of data lines; and

a processing system comprising:

a plurality of output terminals configured to be connected to the plurality of data lines;

a plurality of output amplifiers configured to output a plurality of drive voltages, respectively, the drive voltages having the same polarity;

first switch circuitry configured to connect a first output terminal of the plurality of output terminals to a selected one of the plurality of output amplifiers; and

a plurality of intermediate nodes configured to receive a plurality of grayscale voltages,

wherein each of the output amplifiers comprises:

an amplifier circuit comprising two input terminals; and

second switch circuitry configured to connect a selected one of the two input terminals to an output of the amplifier circuit and connect the other of the two input terminals to one of the plurality of intermediate nodes,

wherein the first switch circuitry comprises:

a first connection state in which the first output terminal

is connected to a first output amplifier of the plurality of output amplifiers, the first connection state to output a first drive voltage of the first output amplifier at the first output terminal; and

a second connection state in which the first output terminal

is connected to a second output amplifier of the plurality of output amplifiers of the plurality of output amplifiers, the second connection state to output a second drive voltage of the second output amplifier at the first output terminal, and

wherein the first drive voltage and the second drive voltage have a same polarity.

16. A method, comprising:

outputting, when a switch circuitry is in a first connection state, a first drive voltage from a first output amplifier by the switch circuitry to a first output terminal configured to be connected to a first data line of a display panel;

outputting, when the switch circuitry is in a second connection state, a second drive voltage from a second output amplifier by the switch circuitry to the first output terminal, the second drive voltage having the same polarity as the first drive voltage;

outputting a third drive voltage from the first output amplifier to a second output terminal configured to be connected to a second data line of the display panel; and

outputting a fourth drive voltage from the second output amplifier to the second output terminal.

17. The method of claim 16 , further comprising:

outputting a fifth drive voltage from a third output amplifier to the first output terminal, the fifth drive voltage having the same polarity as the first drive voltage.