Display Device Pixel Area Segmentation for Brightness Uniformity
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Solution Overview
Problem
Organic light emitting display devices experience brightness differences due to varying RC load values across different pixel areas, leading to inconsistent image brightness across the display.
Innovation Solution
The implementation of a substrate with multiple pixel areas of varying widths, each driven by distinct scan and light-emitting drivers, and the use of a gamma driver to supply different gamma voltages to compensate for brightness differences, ensuring uniform brightness across the display by adjusting data signal voltages based on grayscale levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If wiring lines are extended to cover more pixels in horizontal direction, then the display area is increased, but the RC load value varies causing brightness difference
Solution Approach 1:
The display device divides the pixel array into multiple pixel areas with different widths. By segmenting the display area into regions with different horizontal pixel counts, the patent creates distinct wiring line configurations for each region, allowing independent optimization of RC load characteristics for each segment while maintaining overall large display area coverage
Solution Approach 2:
The patent applies different width configurations to different pixel areas based on their specific RC load requirements. Each pixel area is locally optimized with a width tailored to its position and wiring characteristics, ensuring uniform brightness across the entire display while maintaining varied local structures to manage RC load variations
2Illumination intensity
If different widths of pixel areas are implemented, then brightness uniformity is improved, but device complexity increases
Solution Approach 1:
The display device is segmented into multiple pixel areas with different widths, where each segment is independently configured to achieve uniform brightness. This segmentation allows the complex brightness uniformity problem to be divided into manageable regional optimizations without requiring complete redesign of the entire display structure
Solution Approach 2:
The patent employs a unified driving methodology that can universally apply to multiple pixel areas with different widths. The same basic pixel structure and driving circuit architecture are used across all regions, with only the width parameter varying, thereby achieving brightness uniformity without proportionally increasing overall device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively minimizes brightness differences between pixel areas, resulting in a uniform image display by compensating for RC load variations through targeted voltage adjustments, thereby enhancing the display's overall brightness consistency.
Implementation Method 1
Electrons injected from one of the electrodes may combine with holes injected from the other electrode in the organic light emitting layer to form excitons, and light may be emitted when the excitons discharge energy.
Data Source
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AI summary
The present inventive concept relates to a display device improving a bright difference. An exemplary embodiment of the inventive concept provides a display device, including a panel including a plurality of pixel areas having different widths, and a data driver supplying data signals having different voltages to the plurality of pixel areas in response to a same grayscale.