Shared Elongated Subpixel Pattern for High Density Displays

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Solution Overview

Problem

High pixel per inch (PPI) displays face limitations in aperture ratio and resolution due to constraints in pixel and subpixel patterning during fabrication, leading to inefficiencies in modern high-density visual display technologies like AMOLEDs.

Innovation Solution

A pixel pattern where each pixel shares an elongated subpixel of a first primary color with an adjacent pixel, and an elongated subpixel of a second or third primary color is located on the opposite side, with the shared subpixels driven by separate circuits to minimize resolution loss and enhance fill factor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional pixel patterning is used, then manufacturing is simpler, but aperture ratio and resolution are limited

Engineering Contradiction:

Improveaperture ratioVSAvoidpixel pattern complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

Adjacent pixels share common subpixels to increase the aperture ratio. Specifically, each pixel shares an elongated subpixel with an adjacent pixel, effectively merging the subpixel structures to achieve higher fill factor without requiring separate subpixels for each pixel

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pixel pattern is segmented into alternating arrangements where pixels of different colors are positioned to share subpixels. This segmentation allows optimization of the shared subpixel configuration to maximize aperture ratio while maintaining color reproduction

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If shared subpixels are used to increase aperture ratio, then fill factor improves, but resolution may be compromised

Engineering Contradiction:

Improvefill factorVSAvoidresolution

Core Design Contradiction:

Manufacturing precisionVSMeasurement precision

Solution Approach 1:

Different regions of the display have different subpixel sharing configurations optimized for their specific requirements. The shared elongated subpixels are positioned and oriented to maximize both fill factor and resolution in critical viewing areas

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The subpixels are made elongated rather than square, extending in one dimension to increase the aperture ratio. This dimensional change allows the same area to provide both high fill factor and maintained resolution through strategic orientation

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Measurement precision

If more subpixels are added to improve resolution, then PPI increases, but manufacturing complexity increases

Engineering Contradiction:

ImprovePPIVSAvoidpatterning difficulty

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

By having adjacent pixels share subpixels, the total number of separate subpixel structures to be manufactured is reduced. This merging approach achieves high PPI with fewer individual patterning steps and less manufacturing complexity

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS10204540B2High density pixel pattern

Publication Date: 2019.02.12 IGNIS INNOVATION

AI summary

A pixel pattern of material light emissive areas for an emissive display system having pixels, each pixel having subpixels, each subpixel having a light emitting device defining the material light emissive area of the subpixel, the pixel pattern comprising: for each pixel, a shared elongated subpixel of a first primary color shared with an adjacent pixel and an elongated subpixel of a second or third primary color located in an area on an opposite side of the shared elongated subpixel from the adjacent pixel.