Stacked Display Lenses Reduce Interference Patterns
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Solution Overview
Problem
When multiple display panels are stacked in a display device, slight displacements can cause misalignment of light shielding layers and metal lines, leading to interference patterns that affect image quality.
Innovation Solution
The use of lenses between display panels, specifically first and second lenses with different diameters, and a unique pixel structure where sub-pixels have non-parallel sides, helps to reduce interference by enlarging the light irradiation range and eliminating brightness changes caused by misaligned light shielding layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple display panels are stacked to meet product requirements, then the display device can achieve larger size or higher resolution, but slight displacement between panels causes misalignment of light shielding layers and metal lines, leading to interference patterns that deteriorate image quality
Solution Approach 1:
The patent introduces asymmetric optical path lengths for different colors of light by positioning the optical path length adjustment layer at different distances from the light emitting surface for red, green, and blue subpixels. This asymmetric arrangement compensates for the misalignment caused by panel displacement, reducing interference patterns while maintaining the multi-panel stacked structure.
Solution Approach 2:
The patent adjusts the optical path length parameter for different color channels by varying the thickness or refractive index of the optical path length adjustment layer. This parameter adjustment compensates for the relative displacement between stacked panels, aligning the light shielding layers and metal lines optically to eliminate interference patterns.
2Reliability
If display panels are stacked and combined, then the display device achieves enhanced performance, but misalignment of light shielding layers and metal lines affects display quality
Solution Approach 1:
The patent applies a preliminary compensation action by introducing an optical path length adjustment layer before the light exits the display panel. This layer pre-adjusts the optical paths of different colors to account for potential misalignment in stacked panels, ensuring that even with manufacturing tolerances, the final displayed image remains free of interference patterns.
Solution Approach 2:
The optical path length adjustment layer serves as an intermediary element between the light emitting surface and the external environment. It mediates the optical paths of different colors, compensating for misalignment issues in stacked panels and ensuring proper alignment of light shielding layers and metal lines without requiring perfect manufacturing precision.
3Object-affected harmful factors
If optical path length adjustment is implemented for different colors, then interference patterns are reduced, but the device structure becomes more complex
Solution Approach 1:
The optical path length adjustment layer serves multiple functions simultaneously: it adjusts the optical path length for different colors, acts as a structural support layer, and can incorporate additional optical elements. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while effectively reducing interference patterns.
Solution Approach 2:
The patent merges the optical path length adjustment function with existing display panel structures by integrating the adjustment layer into the panel's optical stack. This combining approach eliminates the need for separate adjustment mechanisms, reducing overall device complexity while still achieving interference pattern reduction through differential optical path adjustment.
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 solution improves display quality by reducing interference patterns and enhancing image clarity, even when panels are not perfectly aligned, through the strategic placement of lenses and non-parallel pixel structures.
Implementation Method 1
a lens having a diameter smaller than a sub-pixel width of the second display panel are disposed between the first display panel and the second display panel
Data Source
AI summary
The present invention provides a display device, including a first display panel, a second display panel, and a plurality of first lenses. The first display panel has a light emitting surface and includes a plurality of first sub-pixels. Each of the first sub-pixels has a first sub-pixel width. The second display panel is located at one side of the light emitting surface of the first display panel and includes a plurality of second sub-pixels. Each of the second sub-pixels has a second sub-pixel width. The first lenses are disposed between the first display panel and the second display panel. Each of the first lenses has a first diameter, and the first diameter is smaller than the second sub-pixel width.