Modular LED Display Pixel Layout for Interface Color Consistency

Solution Overview

Problem

Modular display devices face challenges in maintaining uniform color and preventing optical loss at the interfaces between modules, leading to potential color changes when viewed from different angles.

Innovation Solution

The solution involves designing a display device where the distance between the interface and adjacent subpixels is greater than the shortest distance between neighboring subpixels within a module, and the pixel pitch including the interface is equal to or smaller than 1.1 times the pixel pitch in the display module, thereby minimizing optical loss and maintaining consistent color.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If multiple unit display modules are connected to form a large-area display device, then the display device can be manufactured more easily and repaired more easily, but assembly tolerance occurs and optical loss occurs at the interface between modules

Engineering Contradiction:

Improvemanufacturing easeVSAvoidassembly tolerance

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The display device is divided into multiple unit display modules that can be manufactured and assembled separately. Each module contains multiple pixels with subpixels arranged in a specific pattern, allowing modular manufacturing while maintaining overall display quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different design considerations to different regions: pixels near the interface have adjusted subpixel arrangements compared to pixels away from the interface. Specifically, the distance from the interface to adjacent subpixels is controlled to be greater than the shortest distance between neighboring subpixels, compensating for optical loss at the interface region.

Inventive Principle:

Principle #3Local quality

2Ease of repair

If multiple unit display modules are connected to form a large-area display device, then the display device can be manufactured more easily and repaired more easily, but optical loss occurs at the interface between modules leading to color changes depending on viewing angle

Engineering Contradiction:

Improverepair easeVSAvoidcolor consistency

Core Design Contradiction:

Ease of repairVSReliability

Solution Approach 1:

The patent applies different design considerations to different regions: pixels near the interface have adjusted subpixel arrangements compared to pixels away from the interface. Specifically, the distance from the interface to adjacent subpixels is controlled to be greater than the shortest distance between neighboring subpixels, compensating for optical loss at the interface region.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent modifies geometric parameters of the pixel structure near the interface. The distance from the interface to adjacent subpixels is specifically controlled to be greater than the shortest distance between neighboring subpixels, which changes the optical path and compensates for interface-related optical loss, thereby maintaining color consistency across viewing angles.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the distance between interface and adjacent subpixel is increased to prevent optical loss, then color consistency is improved, but the pixel pitch including interface increases

Engineering Contradiction:

Improvecolor consistencyVSAvoidpixel pitch

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent modifies geometric parameters of the pixel structure near the interface. The distance from the interface to adjacent subpixels is specifically controlled to be greater than the shortest distance between neighboring subpixels, which changes the optical path and compensates for interface-related optical loss, thereby maintaining color consistency across viewing angles.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite pixel structure where pixels near the interface have different subpixel arrangements compared to pixels away from the interface. This composite approach allows the display to maintain overall pixel pitch requirements while having localized variations that compensate for interface optical loss.

Inventive Principle:

Principle #40Composite materials

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 design effectively prevents or alleviates unintended optical phenomena and optical loss at the interfaces, ensuring that color is smoothly implemented and maintained across the modular display device, even when viewed from oblique angles.

Implementation Method 1

a light emitting element electrically connected to the electrode pad

Methodology Applied

Scientific EffectLight emitting diode effect: Light Emitting Diode

Implementation Method 2

a light emitting device... a light-emitting element electrically connected to the electrode pad

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS20250070097A1Display device using semiconductor light emitting diodes

Publication Date: 2025.02.27 LG ELECTRONICS INC

AI summary

A display device using a light emitting device applicable to display device-related technical fields is provided. In a display device implemented by combining a plurality of unit display modules in which a plurality of unit pixel regions is defined, the plurality of unit display modules is combined with each other with an interface therebetween. Each of the unit display modules includes an electrode pad arranged in a unit pixel to define a plurality of unit subpixels, and a light-emitting element electrically connected to the electrode pad. A shortest distance between neighboring pixels including the interface may be greater than a shortest distance between neighboring pixels in the display module.