Driving device for self-luminous display panel and operation method thereof

Patent metadata

Field	Value
Publication number	US-12260825-B1
Application number	US-202318473265-A
Country	US
Kind code	B1
Filing date	Sep 24, 2023
Priority date	Sep 24, 2023
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

The disclosure provides a driving device for a self-luminous display panel and an operation method thereof. The driving device includes multiple GAMMA voltage circuits, a group of driving channels, and a routing circuit. Each driving channel is coupled to the corresponding GAMMA voltage circuit to receive a corresponding group of GAMMA voltages. Each driving channel converts corresponding sub-pixel data into a corresponding gray scale voltage based on the corresponding group of GAMMA voltages. The routing circuit is coupled to the output terminals of the driving channels. The routing circuit dynamically changes the coupling relationship between the driving channels and multiple data lines of the self-luminous display panel during different scanning periods.

First claim

What is claimed is:

1. A driving device for a self-luminous display panel, comprising:
a plurality of GAMMA voltage circuits, comprising a first GAMMA voltage circuit and a second GAMMA voltage circuit, wherein each of the GAMMA voltage circuits generates a group of GAMMA voltages, wherein voltage levels of a first group of GAMMA voltages generated by the first GAMMA voltage circuit are the same as voltage levels of a second group of GAMMA voltages generated by the second GAMMA voltage circuit;
a first group of driving channels, wherein each driving channel in the first group of driving channels is coupled to a corresponding GAMMA voltage circuit in the GAMMA voltage circuits to receive a corresponding group of GAMMA voltages, and each driving channel in the first group of driving channels converts corresponding sub-pixel data into a corresponding gray scale voltage based on the corresponding group of GAMMA voltages; and
a first routing circuit coupled to an output terminal of each driving channel in the first group of driving channels to receive the corresponding gray scale voltage, wherein the first routing circuit dynamically changes a coupling relationship between different driving channels in the first group of driving channels and different data lines in a first group of data lines of the self-luminous display panel during different scanning periods.

2. The driving device as claimed in claim 1 , wherein the first group of driving channels comprises a first driving channel and a second driving channel, the first driving channel is coupled to the first GAMMA voltage circuit to receive the first group of GAMMA voltages, and the second driving channel is coupled to the second GAMMA voltage circuit to receive the second group of GAMMA voltages,
during a first scanning period, the first routing circuit couples an output terminal of the first driving channel to a first data line in the first group of data lines and couples an output terminal of the second driving channel to a second data line in the first group of data lines; and
during a second scanning period after the first scanning period, the first routing circuit couples the output terminal of the first driving channel to the second data line and couples the output terminal of the second driving channel to the first data line.

3. The driving device as claimed in claim 2 , wherein the first routing circuit comprises:
a first switch having a first terminal coupled to the output terminal of the first driving channel, wherein a second terminal of the first switch is coupled to the first data line in the first group of data lines of the self-luminous display panel;
a second switch having a first terminal coupled to the output terminal of the first driving channel, wherein a second terminal of the second switch is coupled to the second data line in the first group of data lines of the self-luminous display panel;
a third switch having a first terminal coupled to the output terminal of the second driving channel, wherein a second terminal of the third switch is coupled to the first data line in the first group of data lines of the self-luminous display panel; and
a fourth switch having a first terminal coupled to the output terminal of the second driving channel, wherein a second terminal of the fourth switch is coupled to the second data line in the first group of data lines of the self-luminous display panel,
wherein the first switch and the fourth switch are turned on and the second switch and the third switch are turned off during the first scanning period, and the first switch and the fourth switch are turned off and the second switch and the third switch are turned on during the second scanning period.

4. The driving device as claimed in claim 1 , wherein the plurality of GAMMA voltage circuits further comprise a third GAMMA voltage circuit, the first group of driving channels comprises a first driving channel, a second driving channel, and a third driving channel, the first driving channel is coupled to the first GAMMA voltage circuit to receive the first group of GAMMA voltages, the second driving channel is coupled to the second GAMMA voltage circuit to receive the second group of GAMMA voltages, and the third driving channel is coupled to the third GAMMA voltage circuit to receive a third group of GAMMA voltages,
during a first scanning period, the first routing circuit couples an output terminal of the first driving channel, an output terminal of the second driving channel, and an output terminal of the third driving channel to a first data line, a second data line, and a third data line in the first group of data lines in a one-to-one manner based on a first coupling relationship;
during a second scanning period after the first scanning period, the first routing circuit couples the output terminals of the first driving channel, the second driving channel, and the third driving channel to the first data line, the second data line, and the third data line in the one-to-one manner based on a second coupling relationship different from the first coupling relationship; and
during a third scanning period after the second scanning period, the first routing circuit couples the output terminals of the first driving channel, the second driving channel, and the third driving channel to the first data line, the second data line, and the third data line in the one-to-one manner based on a third coupling relationship different from the first coupling relationship and the second coupling relationship.

5. The driving device as claimed in claim 4 , wherein,
during the first scanning period, the first routing circuit couples the output terminal of the first driving channel to the first data line, couples the output terminal of the second driving channel to the second data line, and couples the output terminal of the third driving channel to the third data line;
during the second scanning period, the first routing circuit couples the output terminal of the first driving channel to the third data line, couples the output terminal of the second driving channel to the first data line, and couples the output terminal of the third driving channel to the second data line; and
during the third scanning period, the first routing circuit couples the output terminal of the first driving channel to the second data line, couples the output terminal of the second driving channel to the third data line, and couples the output terminal of the third driving channel to the first data line.

6. The driving device as claimed in claim 4 , wherein the first routing circuit comprises:
a first switch having a first terminal coupled to the output terminal of the first driving channel, wherein a second terminal of the first switch is coupled to the first data line in the first group of data lines of the self-luminous display panel;
a second switch having a first terminal coupled to the output terminal of the first driving channel, wherein a second terminal of the second switch is coupled to the second data line in the first group of data lines of the self-luminous display panel;
a third switch having a first terminal coupled to the output terminal of the first driving channel, wherein a second terminal of the third switch is coupled to the third data line in the first group of data lines of the self-luminous display panel;
a fourth switch having a first terminal coupled to the output terminal of the second driving channel, wherein a second terminal of the fourth switch is coupled to the first data line in the first group of data lines of the self-luminous display panel;
a fifth switch having a first terminal coupled to the output terminal of the second driving channel, wherein a second terminal of the fifth switch is coupled to the second data line in the first group of

Assignees

• Novatek Microelectronics Corp

Inventors

• Cheng Yi-Shen
• Hsu Che Wei

Classifications

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G2320/0673

  for control of gamma adjustment, e.g. selecting another gamma curve · CPC title

• G09G3/3258 Primary

  with pixel circuitry controlling the voltage across the light-emitting element · CPC title