Compensation Power Generator for Narrow Bezel Display Flicker
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Solution Overview
Problem
Display devices with split screens experience flickers due to luminance variations when a scene change occurs on one screen, particularly in narrow bezel designs where the width of the pixel driving voltage line is reduced, leading to increased IR variations and luminance changes.
Innovation Solution
A display device and driving method that include a pixel array with data and gate lines, pixel circuits, and power supply lines, along with a compensation power generation unit that adjusts reference voltages and input reference voltages based on variations in the pixel driving voltage to minimize luminance changes across split screens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the width of the pixel driving voltage line is reduced to implement a narrow bezel, then the bezel width is decreased, but the IR variation increases causing luminance variation and flicker
Solution Approach 1:
The patent implements a feedback mechanism by monitoring the actual pixel driving voltage at multiple positions along the power supply line and comparing it with a reference voltage. When voltage deviation is detected, the system adjusts the input reference voltage to compensate, thereby maintaining uniform luminance across the display even with narrow bezel lines that have higher IR variation.
Solution Approach 2:
The patent dynamically changes the input reference voltage parameter based on detected voltage deviations. By adjusting this parameter in response to IR variation caused by narrow bezel lines, the system compensates for luminance non-uniformity and prevents flicker while maintaining the narrow bezel design.
2Adaptability or versatility
If split screen functionality is implemented to display different content, then screen versatility is improved, but luminance variation occurs during scene changes causing flicker
Solution Approach 1:
The patent uses feedback control to detect luminance variations that occur during scene changes in split screen mode. When one screen displays a scene change causing current variation, the feedback mechanism detects the resulting voltage deviation and adjusts the reference voltage to compensate, maintaining stable luminance on both screens simultaneously.
Solution Approach 2:
The patent applies preliminary anti-action by proactively adjusting the reference voltage in response to detected voltage deviations before they manifest as visible flicker. This preemptive compensation ensures that luminance stability is maintained even during dynamic scene changes in split screen configurations.
3Shape
If the pixel driving voltage line width is reduced, then the bezel design is improved, but the current variation causes increased luminance non-uniformity
Solution Approach 1:
The patent implements feedback control by measuring the actual pixel driving voltage at multiple positions and comparing it with the reference voltage. When IR variation caused by narrow bezel line width is detected, the system adjusts the input reference voltage to compensate, ensuring uniform luminance across the display while maintaining the improved narrow bezel design.
Solution Approach 2:
The patent dynamically adjusts the input reference voltage parameter to compensate for IR variation resulting from reduced line width. This parameter change enables the system to maintain luminance uniformity while benefiting from the aesthetic and design advantages of a narrow bezel.
Data Source
AI summary
A display device and a driving method thereof are discussed. This display device receives first and second input reference voltages, generates gamma reference voltages having different voltage levels, receives each of the gamma reference voltages, and generates a data voltage of pixel data. The first and second input reference voltages and the reference voltage are changed according to a variation of the pixel driving voltage.