Pixel Array Antialiasing for Curved Display Edges
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Solution Overview
Problem
Electronic device displays with curved edges often exhibit jagged pixel layouts, leading to undesirable jagged edges in displayed images due to inactive border regions, which existing technologies fail to adequately address.
Innovation Solution
The implementation of antialiasing pixels with selectively reduced strengths along the curved edges of the display, achieved through modifications in drive transistor geometry, series resistances, or opaque light blocking structures, to visually smooth the content displayed, using techniques such as varying pixel aperture sizes and electrode layouts in liquid crystal displays, and adjusting drive transistor strength in organic light-emitting diode displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pixels are arranged in a standard grid pattern along curved edges, then the display can be manufactured with simple geometry, but the displayed images exhibit jagged edges and undesirable appearance
Solution Approach 1:
The patent applies local quality by differentiating pixel strengths based on their position relative to curved edges. Pixels closer to the curved edge are assigned reduced strengths (e.g., 50%, 25%, 0% of full strength) to create a gradient effect that smooths the visual appearance along curved boundaries, while pixels in the center maintain full strength for optimal image quality.
Solution Approach 2:
The patent changes the parameter of pixel emission strength dynamically based on spatial position. By varying the strength parameter of pixels along curved edges (creating different intensity levels), the patent transforms the visual appearance from jagged to smooth without altering the physical pixel arrangement or geometry.
2Object-affected harmful factors
If antialiasing pixels with reduced strengths are implemented along curved edges, then the jagged appearance is minimized, but the device complexity increases due to additional transistor geometry modifications, series resistances, or light blocking structures
Solution Approach 1:
The patent implements local quality by applying structural modifications only to pixels located along curved edges, while leaving the majority of pixels in the display array with standard simple structures. This localized approach reduces the overall device complexity increase while achieving the antialiasing effect where needed.
Solution Approach 2:
The patent segments the pixel array into different zones: full-strength pixels in the center, partial-strength pixels in transition zones, and zero-strength pixels at the curved boundaries. This segmentation allows complex structures to be applied only where necessary for antialiasing, rather than throughout the entire display.
3Object-affected harmful factors
If pixel strengths are selectively reduced using opaque light blocking structures, then the antialiasing effect is achieved, but the manufacturing precision requirements increase for aligning and sizing the masking layer openings
Solution Approach 1:
The patent applies preliminary action by pre-defining the positions and sizes of opaque masking layer openings during the manufacturing process. The masking structures are designed and positioned in advance to correspond to specific pixel locations along curved edges, allowing the antialiasing effect to be achieved through a single fabrication step rather than requiring post-manufacturing adjustment.
Data Source
AI summary
An electronic device may have a housing and a display in the housing. The display may have one or more curved edges such as curved edges associated with rounded corners in the display and housing. The display may have an array of pixels. The display may include full-strength pixels and may have a band of antialiasing pixels having selectively reduced strengths to visually smooth content displayed along the curved edges. The antialiasing pixels may include single-opening pixels that each have a single opaque masking layer opening and may include dual-opening pixels that each include a pair of opaque masking layer openings. The single-opening pixels may be stronger than the dual-opening pixels.