Display Device Shared Source Driver Channel Architecture
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Solution Overview
Problem
High-resolution and large-sized display devices experience image quality defects due to output deviations between source drivers, causing differences in data charging time and charge rate across pixels, leading to perceived image variations.
Innovation Solution
The display device employs a configuration where adjacent source drivers share data lines and alternately supply data signals to minimize output deviations, with control signals managing the data flow through first and second channel groups to ensure synchronized data delivery across shared data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple source drivers are used to drive large area displays, then the display area and resolution are improved, but output deviations between source drivers cause image quality defects
Solution Approach 1:
The display panel is divided into multiple sub-areas, each driven by a separate source driver. Multiple source drivers (first source driver, second source driver, etc.) are used to independently drive different sub-areas of the display panel, enabling large area displays while maintaining manageable driver complexity
Solution Approach 2:
Adjacent source drivers share common data lines to connect to the display panel. The first source driver and second source driver share first common data lines and second common data lines respectively, allowing synchronized data delivery and minimizing output deviations between drivers through shared signal paths
2Speed
If source drivers supply data signals independently, then data delivery speed is improved, but differences in charging time and charge rate cause image variations
Solution Approach 1:
Multiple source drivers share common data lines (first common data lines, second common data lines) to connect to the display panel. This shared connection architecture ensures that data signals from different source drivers travel through identical signal paths, synchronizing charging time and charge rate across pixels driven by different drivers
Solution Approach 2:
The shared data line configuration creates equipotential conditions for data signal delivery across different source drivers. By using common data lines, the electrical characteristics (impedance, capacitance, inductance) are equalized, ensuring uniform charging behavior and eliminating image variations caused by differential charging times
Data Source
AI summary
A display panel includes: a plurality of pixels connected to a plurality of data lines and a peripheral area at the periphery of the display area; a first channel group including a plurality of first shared channels respectively connected to shared data lines among the data lines; a second channel group including a plurality of second shared channels respectively connected to the shared data lines; a first source driver connected to the first channel group, the first source driver being configured to supply data signals to the shared data lines through the first channel group; and a second source driver connected to the second channel group, the second source driver being configured to supply the data signals to the shared data lines through the second channel group, wherein the first channel group and the second channel group forms a pair to be commonly connected the shared data lines.