MVA Panel Reset Circuit for Touch Domain Disturbance
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Solution Overview
Problem
MVA panels exhibit domain disturbances after mechanical stress, leading to undesired traces from stylus input that persist even after refreshing, making them less suitable for touch panel applications.
Innovation Solution
A recovering image system comprising a data inputting device, a driver with a refresh data unit, AND logic circuit, timing control unit, and digital to analog converter, which outputs analog or reset data signals to the panel to display normal or reset images, allowing for the resetting of push domain areas and balancing visibility with luminance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MVA panel is used for touch panel applications, then touch functionality is achieved, but domain disturbance occurs after mechanical stress
Solution Approach 1:
The patent applies preliminary action by implementing a reset function that is triggered in advance after touch input. The system proactively resets the affected pixel regions before the domain disturbance becomes visually apparent, preventing the degradation of image quality rather than merely reacting to it after occurrence.
Solution Approach 2:
The patent changes the electrical parameters of the affected pixels by applying reset signals that adjust the voltage levels in specific pixel regions. This parameter change allows the liquid crystal molecules to reorient properly, eliminating the domain disturbance caused by mechanical stress from touch operations.
2Productivity
If panel is continuously refreshed, then image update is maintained, but domain disturbance persists
Solution Approach 1:
The patent segments the panel into different regions, applying reset signals only to the specific pixel regions affected by touch input rather than refreshing the entire panel. This selective segmentation allows domain disturbance elimination in affected areas while maintaining normal refresh operations in unaffected areas, thus preserving overall productivity.
Solution Approach 2:
The patent extracts the reset function as a separate, independent operation from the regular refresh cycle. The reset function is triggered independently based on touch input detection, allowing it to operate separately from the continuous refresh process and address domain disturbances without interrupting the overall image refresh productivity.
3Reliability
If reset function is implemented, then domain disturbance is eliminated, but additional circuit complexity is introduced
Solution Approach 1:
The patent merges the reset function with the existing driver circuit structure by integrating the reset signal generation and control logic into the current refresh circuitry. This merging approach eliminates the need for completely separate reset circuits, reducing the overall complexity increase while still achieving reliable domain disturbance elimination.
Solution Approach 2:
The patent implements multi-functionality in the driver circuit by designing components that can perform both regular refresh operations and reset operations. The same driver circuitry and control logic are used for both functions, reducing the need for additional dedicated circuits and minimizing the increase in device complexity.
Data Source
AI summary
The invention relates to a recovering image system comprising a data inputting device, a driver and a panel. The data inputting device outputs digital data signals. The driver device receives the digital data signals, converts the digital data signals to analog data signals, outputs the analog data signals or reset data signals according to timing control signals. The panel receives the analog data signals or the reset data signals and displays normal images, reset images or both according to the analog data signals and the reset data signals. To recover only the disturbed area, feedback of the touch panel to the driver is required.