Tiled Self-Emitting Display Layout for Pixel Pitch Mismatch

Solution Overview

Problem

Existing self-light emitting devices in a tiling scheme face issues with noticeable boundaries due to pixel pitch mismatches between self-light emitting units caused by misalignment or dimensional mismatches.

Innovation Solution

The self-light emitting device is partitioned into unit regions with varying numbers of light emitting cells in central and outer edge portions, allowing for independent control of lighting methods to minimize the visibility of boundaries between units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of stationary object

If non-display regions are folded or overlapping techniques are used, then boundary width is reduced, but pixel pitch mismatch between units remains noticeable

Engineering Contradiction:

Improveboundary widthVSAvoidpixel pitch alignment

Core Design Contradiction:

Length of stationary objectVSManufacturing precision

Solution Approach 1:

The patent applies local quality by differentiating the configuration of light emitting cells between central portions and outer edge portions of each self-light emitting unit. Specifically, the number or positions of light emitting cells are varied in outer edge portions compared to central portions, allowing localized compensation for pixel pitch mismatches at boundaries while maintaining uniformity in central display regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs parameter changes by modifying the number or positions of light emitting cells in different regions. By adjusting these parameters in outer edge portions, the invention compensates for dimensional mismatches and pixel pitch variations, thereby reducing boundary noticeability despite manufacturing tolerances.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If uniform light emitting cell configuration is used across all regions, then manufacturing is simplified, but boundaries become noticeable due to pixel pitch mismatch

Engineering Contradiction:

Improveunit configuration uniformityVSAvoidboundary visibility

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent applies local quality by differentiating the configuration of light emitting cells between central portions and outer edge portions of each self-light emitting unit. Specifically, the number or positions of light emitting cells are varied in outer edge portions compared to central portions, allowing localized compensation for pixel pitch mismatches at boundaries while maintaining uniformity in central display regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent segments the self-light emitting unit into central portions and outer edge portions with different light emitting cell configurations. This segmentation allows independent optimization of each region, with outer edge portions designed to compensate for boundary effects while central portions maintain standard uniform configurations.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS12622146B2Self-light emitting device

Publication Date: 2026.05.05 MITSUBISHI ELECTRIC CORP

AI summary

A self-light emitting device in a tiling scheme includes an array of a plurality of self-light emitting units. Each of the self-light emitting units is partitioned into a plurality of unit regions, and each of the unit regions includes at least one light emitting cell each including one or more self-light emitting elements. A central portion and an outer edge portion of each self-light emitting unit differ in number or positions of one or more light emitting cells in each unit region.