Display Driving Module Gate Enable Period Adjustment
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Solution Overview
Problem
Liquid crystal display (LCD) driving systems face challenges in adjusting to varying circuit loadings, which can affect the operation of the display device due to differences in trace configurations, leading to abnormal panel operation.
Innovation Solution
A driving module and method that adjust the durations of gate enable periods in gate driving signals based on the distance between driving units and scan lines, ensuring the sum of these durations remains constant to mitigate loading variations, while also adjusting data enable periods accordingly to ensure correct voltage delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gate driver transmits scan signals to gates of TFTs using fixed enable periods, then the driving system operates with simple control logic, but the panel operation becomes abnormal due to loading variations from different circuit configurations
Solution Approach 1:
The patent applies dynamics by making the gate enable periods variable rather than fixed. The control unit dynamically adjusts the duration of gate enable periods based on the specific scan line being driven, allowing the system to adapt to different loading conditions caused by varying circuit configurations. This dynamic adjustment ensures reliable panel operation while maintaining relatively simple control logic through automated duration calculation.
Solution Approach 2:
The patent changes the parameter of gate enable period duration to resolve the contradiction. By varying the enable period duration according to the distance between the gate driver and each scan line, the system compensates for loading variations. The control unit calculates and applies different durations, transforming a static control approach into one that adapts to actual circuit conditions, thereby ensuring stable panel operation.
2Manufacturing precision
If the driving system uses uniform gate enable periods for all scan lines, then the circuit design is simplified, but the voltage delivery becomes inconsistent across different scan lines due to trace length differences
Solution Approach 1:
The patent applies local quality by making each gate enable period duration specific to its corresponding scan line rather than uniform across all lines. The control unit determines and applies different durations based on the local conditions (distance from gate driver) of each scan line. This localized adjustment ensures that voltage delivery consistency is achieved for each individual scan line according to its specific loading conditions.
3Manufacturing precision
If the gate enable periods are extended to compensate for loading variations, then the voltage delivery accuracy improves, but the overall scanning speed decreases
Solution Approach 1:
The patent uses dynamics to optimize the balance between voltage delivery accuracy and scanning speed. Rather than uniformly extending all gate enable periods, the control unit dynamically assigns different durations based on actual needs - longer durations for scan lines with greater loading (further from driver) and shorter durations for those with lesser loading. This dynamic approach maintains scanning speed while improving voltage delivery accuracy where needed.
Data Source
AI summary
A driving module for a display device includes a first driving unit, for generating a plurality of data driving signals to a plurality of data lines of the display device according to a first control signal; and a control unit, for generating the first control signal to the first driving unit and a second control signal to a second driving unit of the display device; wherein the control unit controls the second driving unit to generate a plurality of gate driving signals to a plurality of scan lines of the display device via the second control signal, and durations of a plurality of gate enable periods in the plurality of gate driving signals are different.