OLED Display Panel Scan Driver Merging for IC Reduction
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Solution Overview
Problem
As OLED displays increase in size, the number of driving integrated circuits (ICs) required to properly drive the display panel increases, leading to a need for more complex and costly signal drivers to manage separate portions of the panel effectively.
Innovation Solution
A display panel module is divided into portions with shared scan and data driving units, where a single scan driving unit simultaneously scans both scan line groups and data driving units output voltages to corresponding data line groups with synchronized timing, reducing the overall number of scan driving ICs needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display panel is divided into separate portions with separate scan driving units, then each portion can be driven independently, but the number of scan driving ICs increases leading to increased device complexity
Solution Approach 1:
A single scan driving unit is designed to perform multiple functions by sequentially scanning different scan line groups corresponding to different portions of the display panel. The scan driving unit can switch between scanning the first scan line group for the first portion and the second scan line group for the second portion, eliminating the need for separate scan driving ICs for each portion while maintaining independent driving capability.
Solution Approach 2:
The patent combines the functionality of multiple scan driving units into a single scan driving unit that can handle multiple scan line groups. By merging the scanning functions and using a unified control mechanism, the system reduces the total number of scan driving ICs from multiple separate units to one integrated unit that serves all portions of the display panel.
2Measurement precision
If multiple scan driving ICs are used to drive different portions of the panel, then signal management is more precise, but the cost and complexity of the system increases
Solution Approach 1:
The scan driving unit employs dynamic switching mechanisms to adaptively select which scan line group to scan at different time periods. The unit can dynamically transition between scanning the first scan line group and the second scan line group based on timing signals, maintaining precise signal management for different portions without requiring static separate driving units for each portion.
3Reliability
If separate data driving units are used for each portion, then data output is more controlled, but the number of driving ICs increases
Solution Approach 1:
The data driving function is segmented into different time periods rather than requiring separate physical units for each portion. The data driving unit outputs data voltages to different data line groups at different time periods - first to the first data line group for the first portion, then to the second data line group for the second portion. This temporal segmentation maintains controlled data output while reducing the number of physical driving ICs needed.
Data Source
AI summary
A display panel module, organic light-emitting diode (OLED) display and method of driving the same are disclosed. In one aspect, the module includes a display panel divided into a first portion and a second portion and a plurality of scan and data lines divided into groups arranged in the first and second potions. The module further includes a first scan driver configured to sequentially apply scan signals to each of the first and second scan line groups. The first scan driver is further configured to substantially simultaneously apply the scan signals to corresponding scan lines of the first and second scan line groups. The module also includes a first data driver configured to output first data voltages to the first data line group and a second data driver configured to output second data voltages to the second data line group with the same timing as the first data driver.