Display Panel Voltage Compensation for Multi-Rate Luminance Uniformity
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Solution Overview
Problem
LED displays using multi-area frame rate technology experience luminance discrepancies between video and text regions due to differing refresh rates, leading to uneven brightness across the screen, which degrades user experience.
Innovation Solution
A method involving a refresh control signal to configure areas with different refresh rates and initial signals with tailored voltage levels to initialize these areas, adjusting supply and ground voltage signals to compensate for luminance variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-area frame rate technology is used to display video and text regions simultaneously with different refresh rates, then productivity is improved by optimizing refresh rates for different content types, but luminance uniformity deteriorates due to brightness discrepancies between regions
Solution Approach 1:
The patent applies local quality by providing different initial voltages to different regions of the display panel. Specifically, a first initial voltage is applied to a first region and a second initial voltage is applied to a second region, where the voltages are different to compensate for the luminance discrepancies caused by different refresh rates. This ensures that each region has optimized initial conditions tailored to its specific refresh rate requirements.
Solution Approach 2:
The patent changes the electrical parameter (initial voltage) to compensate for luminance discrepancies. By adjusting the initial voltage values for different regions, the patent compensates for the brightness differences that arise from using different refresh rates, thereby maintaining luminance uniformity across the display panel while preserving the productivity benefits of multi-area frame rate technology.
2Illumination intensity
If different initial voltages are provided to different regions, then luminance uniformity is improved, but device complexity increases due to additional control signals
Solution Approach 1:
The patent segments the display panel into multiple regions (first region and second region) with different refresh rates, and applies different initial voltage compensation strategies to each segment. This segmentation approach allows for targeted luminance uniformity optimization in each region without requiring complete system redesign, thereby managing device complexity through localized solutions.
Data Source
AI summary
A method of compensating a display panel includes providing a refresh control signal to configure a first area and a second area of the display panel; and providing an initial signal to the display panel. The initial signal includes a first initial voltage to initialize the first area before a first data operation, and a second initial voltage to initialize the second area before a second data operation.