Display Gamma Voltage Compensation for Panel Luminance Uniformity
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Solution Overview
Problem
Existing display devices face limitations in display performance, particularly in compensating for luminance differences due to voltage drops without affecting pixel driving stability and power voltage supply.
Innovation Solution
A display device with a luminance compensating unit that adjusts gamma voltage based on the difference between high potential voltages supplied to pixels at different sides of the display panel, using a gamma driving voltage compensating unit to detect and compensate for voltage drops in real time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If gamma voltage is adjusted to compensate for luminance difference, then display quality is improved, but device complexity increases due to additional luminance compensating unit
Solution Approach 1:
The luminance compensating unit measures the actual high potential voltage at pixel locations and feeds this information back to adjust the gamma voltage accordingly. This closed-loop feedback mechanism enables real-time compensation for voltage drops, ensuring uniform luminance across the display panel while maintaining reasonable circuit complexity through efficient feedback processing.
Solution Approach 2:
The system dynamically changes the gamma voltage parameter based on measured voltage drops at different pixel locations. By adjusting this key parameter in response to actual operating conditions, the system achieves luminance uniformity without requiring fundamental changes to the display structure or adding excessively complex circuitry.
2Illumination intensity
If real-time voltage detection is implemented, then luminance deviation is reduced, but measurement precision requirements increase
Solution Approach 1:
The luminance compensating unit implements voltage measurement at specific critical locations (first and second pixel lines at opposite ends of the display panel) rather than attempting to measure every pixel. This localized measurement approach provides sufficient information to characterize voltage drops across the entire panel while reducing the precision requirements compared to universal pixel-level measurement.
Solution Approach 2:
The system uses the luminance compensating unit as an intermediary component that indirectly measures voltage characteristics through strategically selected pixel lines. This intermediary approach provides adequate measurement precision for compensation purposes without requiring extremely high precision measurement capabilities across all pixels.
Data Source
AI summary
A display device can include a display panel having a plurality of pixels, and a luminance compensating unit. The luminance compensating unit can adjust a gamma voltage according to a difference between a first high potential voltage and a second high potential voltage. The first high potential voltage can be supplied to a pixel that is the most adjacent to one side of the display panel, among the plurality of pixels. The second high potential voltage can be supplied to a pixel that is the most adjacent to another side of the display panel, among the plurality of pixels.