Source Driver Voltage Synchronization for Display Split Screen
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Solution Overview
Problem
Display panels using DLS and Tri-gate architectures experience split screens due to differences in signal transmission and processing, leading to varying charging times for sub-pixels connected to different source driver chips, resulting in display inconsistencies.
Innovation Solution
A display device with a voltage comparison circuit and a voltage adjustment circuit that compares the absolute values of data voltage signals from adjacent source driver chips and adjusts their latch and update signals to ensure synchronized output, reducing the difference in charging times and improving display consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple source driver chips are used to control the display panel, then the load driven by source driver chip is reduced, but the charging times of pixels electrically connected with different source driver chips become different causing split screens
Solution Approach 1:
The patent adjusts the output timing parameters of source driver chips by introducing adjustable delay circuits. Each source driver chip includes a delay circuit that can be configured to output data signals at different times, allowing synchronization of pixel charging across multiple chips. This parameter adjustment resolves the timing mismatch caused by using multiple chips while maintaining the benefit of reduced load per chip.
Solution Approach 2:
The patent implements a feedback mechanism where the timing differences in pixel charging are detected and used to adjust the output timing of source driver chips. By monitoring the charging times and adjusting the delay parameters accordingly, the system achieves synchronized display across all pixels controlled by different source driver chips, eliminating the split screen effect.
2Power
If multiple source driver chips are used to reduce load, then device complexity increases due to signal transmission and processing differences
Solution Approach 1:
The patent designs source driver chips with universal functionality that can operate independently yet synchronously. Each chip is equipped with identical circuit structures including delay circuits, allowing them to perform the same function with adjustable timing. This universality simplifies the overall system by using identical modules rather than requiring complex inter-chip communication and coordination mechanisms.
Data Source
AI summary
The present invention discloses a display device and a display method. A voltage adjustment circuit is configured to compare whether a difference between absolute values of a first data voltage signal and a second data voltage signal at a preset moment exceeds a set threshold range and output a control signal to a voltage adjustment circuit when the difference exceeds the set threshold range. Thus, a first data latch and update signal of a first source driver chip is adjusted by the voltage adjustment circuit, or a second data latch and update signal of a second source driver chip is adjusted, so that the first data voltage signal and the second data voltage signal are respectively output to a first data line and a second data line at a same time.