Curved Display Pixel Structure for Color Accuracy
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Solution Overview
Problem
Display devices with curved portions suffer from color failures, such as reddish or bluish tinting of images due to the reinforcement of specific light colors, leading to inaccurate color reproduction.
Innovation Solution
The display device incorporates a cover window with curved sides and a display panel featuring first and second type pixels, where the second type pixels in the curved areas have non-flat portions that increase in number further from the plane area, and a distribution of these pixels is adjusted based on distance and viewing angle to balance light emission, using reflective and semi-transmissive electrodes to enhance color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a cover window with curved sides is bonded to a display panel to enable curved display, then the display device achieves flexible curved display capability, but color failures occur on the curved portions causing inaccurate color reproduction
Solution Approach 1:
The patent applies local quality by differentiating pixel structures based on their location. First type pixels with flat light emitting diodes are used in plane areas, while second type pixels with non-flat light emitting diodes are used in curved areas. This localized structural differentiation ensures that each pixel type is optimized for its specific geometric environment, thereby maintaining color accuracy across both flat and curved display regions without compromising overall curved display capability
Solution Approach 2:
The patent implements parameter changes by modifying the physical configuration of the light emitting diode structure. By changing from a flat configuration to a non-flat configuration with multiple non-flat portions, the light emission characteristics are adjusted to compensate for the curvature effect. This parameter modification enables accurate color reproduction on curved portions while preserving the curved display functionality
2Manufacturing precision
If second type pixels with non-flat portions are used in curved areas to correct color failures, then color reproduction accuracy improves, but device structure becomes more complex
Solution Approach 1:
The patent applies segmentation by dividing the display panel into distinct regions: plane areas containing first type pixels and curved areas containing second type pixels. This spatial segmentation allows each pixel type to be independently optimized for its specific region, managing structural complexity through regional specialization rather than uniform complexity across the entire display
Solution Approach 2:
The patent implements partial action by applying the complex non-flat pixel structure only where necessary in curved areas, rather than throughout the entire display. This selective application minimizes overall device complexity while achieving the required color accuracy improvement in the specific problematic curved regions
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 configuration effectively reduces color failures by balancing light emission across different pixels, improving color reproducibility and accuracy on curved surfaces.
Implementation Method 1
each including a second light emitting diode that includes at least one non-flat portion forming a non-flat side
Implementation Method 2
the pixel electrode, the emission layer, and the power source electrode may include concave patterns that overlap each other
Data Source
AI summary
A display device includes a cover window that includes a first plane portion and first side portions that form curved sides, and a display panel that includes a first plane area corresponding to the first plane portion and first curved areas corresponding to the first side portions, where the display panel further includes a substrate, a plurality of first type pixels that are disposed in the first plane area and each including a first light emitting diode that is parallel with one side of the substrate, and a plurality of second type pixels that are disposed in the first curved areas, and each including a second light emitting diode that includes at least one non-flat portion forming a non-flat side that is not parallel with one side of the substrate.