Display Subpixel Layout for Uniform Virtual Pixel Brightness
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Solution Overview
Problem
Conventional OLED display technologies face challenges in increasing resolution due to limitations in sub-pixel size and pixel pitch, leading to graininess and distortion caused by nonuniform distribution of brightness centers in virtual pixels.
Innovation Solution
A display substrate arrangement featuring alternately arranged first, second, and third sub-pixels forming virtual quadrilaterals, with varying distances and symmetry axes, allowing for uniform brightness center distribution without shifting sub-pixels, thereby enhancing resolution and reducing graininess.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sub-pixel sizes are reduced and pixel pitches are reduced to increase resolution, then resolution is improved, but manufacturing precision and production level become insufficient
Solution Approach 1:
The patent transitions from traditional rectangular pixel arrangements to a triangular lattice arrangement, changing the geometric dimensionality of pixel organization. This allows sub-pixels to be positioned at vertices of equilateral triangles, creating a more efficient spatial distribution that increases resolution without requiring further reduction in sub-pixel size or pixel pitch, thus avoiding manufacturing precision limitations.
Solution Approach 2:
The patent introduces virtual pixel rendering through software processing, where virtual pixels are dynamically generated by combining signals from multiple physical sub-pixels. This dynamic approach allows the display to achieve higher effective resolution through computational methods rather than purely physical miniaturization, bypassing manufacturing precision constraints.
2Productivity
If sub-pixel rendering technology is used to increase aperture ratio and improve display quality, then aperture ratio and lifetime are improved, but brightness centers of virtual pixels become nonuniformly distributed
Solution Approach 1:
The patent employs asymmetric positioning of sub-pixels within virtual pixel groups, where sub-pixels are arranged at specific vertices of triangular lattices rather than in symmetric rectangular patterns. This asymmetric arrangement, combined with weighted rendering algorithms, enables uniform distribution of brightness centers across the display while maintaining high aperture ratios through efficient sub-pixel sharing.
Data Source
AI summary
Display substrate, display device, high-precision metal mask are provided. Display substrate includes: first, second, and third sub-pixels; in first direction, first and third sub-pixels are alternately arranged to form first sub-pixel rows, second sub-pixels form second sub-pixel rows; in second direction, first and second sub-pixel rows are alternately arranged; two first and two third sub-pixels in two adjacent rows and two adjacent columns form 2*2 array; in the array, two first sub-pixels are in different rows and in different columns, so are the two third sub-pixels, connection lines of centers of two first and two third sub-pixels form virtual quadrilateral, second sub-pixel is within virtual quadrilateral; for multiple distances from centers of two first and two third sub-pixels corresponding to same virtual quadrilateral to center of second sub-pixel, at least two distances are different. Brightness centers of virtual pixels have more uniform distribution.