Timing Controller Signal Transfer for Display Panel Reliability
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Solution Overview
Problem
Conventional liquid crystal display devices using multiple timing controllers face issues when one timing controller experiences an abnormality, leading to incomplete signal supply and application of only DC components to the display panel, resulting in panel deterioration and limited freedom in signal format and circuit design.
Innovation Solution
A driving method and device that enables one timing controller to take control from another when an abnormality occurs, transferring image and control signals between panel driving units to maintain normal display control, preventing DC component application and allowing flexible signal formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple timing controllers are used to drive the display panel, then the display resolution is improved, but the reliability deteriorates when one timing controller experiences an abnormality
Solution Approach 1:
The patent introduces a signal transfer mechanism that acts as an intermediary between timing controllers. When one timing controller experiences an abnormality, the other timing controller can transfer its control signals through this intermediary path to maintain display control, thus resolving the reliability issue while preserving the multi-controller high-resolution configuration
Solution Approach 2:
The patent implements abnormality detection and signal transfer preparation in advance. By detecting timing controller abnormalities beforehand and having pre-established signal transfer paths, the system cushions against potential failures and maintains continuous operation, preventing the reliability deterioration that would otherwise occur
2Device complexity
If one timing controller stops signal supply due to abnormality, then the device complexity is reduced, but the display panel deteriorates due to DC component application
Solution Approach 1:
The patent uses the other functioning timing controller as an intermediary to continue supplying control signals to the display panel. This prevents the complete stoppage of signals that would lead to DC component application and panel deterioration, while avoiding the need for complex additional protection circuits
Solution Approach 2:
The patent enables the remaining healthy timing controller to automatically take over and service the display panel control functions. This self-service mechanism prevents panel deterioration without requiring external intervention or complex additional hardware, maintaining simplicity while protecting against harm
3Reliability
If signal transfer between timing controllers is implemented, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The patent designs the timing controllers with universal signal output capabilities that can function both as primary control signals and as transfer signals to other timing controllers. This multi-functionality enables reliability improvement through signal transfer without requiring separate dedicated transfer circuits, thus avoiding excessive complexity
Data Source
AI summary
A method of driving a display panel is provided which is capable of restoring normal operation to a timing controller in which an abnormality in display control has occurred. When a signal detecting section of one timing controller detects an abnormality that no signal is input or that a supply of a clock signal is stopped, the detected result is transferred from a two-way communicating section of the one timing controller to a two-way communicating section of the other timing controller. The other timing controller having received the detected result transfers a normal image signal and/or clock signal from the two-way communicating section of the other timing controller to the two-way communicating section of the one timing controller. The one timing controller exerts display control of a liquid crystal display panel according to the transferred image signal and/or clock signal.