Display Device Light Guide Member Pixel Isolation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In display devices with light-emitting elements, light emitted from one pixel can mix with adjacent pixels due to the distance between the element substrate and the sealing substrate, leading to deteriorated image quality.

Innovation Solution

A guide member is introduced in the boundary between pixel regions on the first substrate, guiding light emitted from the light-emitting elements in a main light emission direction between the first and second substrates, preventing light from mixing with adjacent pixels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If the sealing substrate and element substrate are separately prepared and adhered, then the manufacturing process is simplified and assembly is easier, but light emitted from light-emitting elements can mix into adjacent pixels in the portion between the substrates

Engineering Contradiction:

Improveease of assemblyVSAvoidlight mixture between pixels

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

A guide member is introduced as an intermediary component between the element substrate and sealing substrate. This guide member extends from the element substrate toward the sealing substrate and guides light in the main emission direction, preventing light from mixing into adjacent pixels while maintaining the separate preparation and assembly advantages of the dual-substrate structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Length of stationary object

If the distance between the element substrate and sealing substrate is increased, then assembly is easier and manufacturing is simpler, but light emitted in directions other than the main light emission direction mixes into other adjacent pixels

Engineering Contradiction:

Improvedistance between substratesVSAvoidlight mixture between pixels

Core Design Contradiction:

Length of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The guide member serves as a light-guiding intermediary that spans the gap between substrates. It allows the substrate distance to be increased for easier assembly while simultaneously confining light within the main emission direction, preventing lateral light mixing even over the increased distance.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The guide member extends in the depth dimension (from element substrate toward sealing substrate) to control light propagation. By adding this dimensional element, the system can tolerate larger substrate separations without compromising lateral light confinement, effectively decoupling the distance parameter from light mixing issues.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Illumination intensity

If a black matrix is formed in the sealing substrate, then contrast is improved, but light diffraction occurs at the boundary between the transmission region of the color filter and the black matrix region

Engineering Contradiction:

ImprovecontrastVSAvoidlight diffraction

Core Design Contradiction:

Illumination intensityVSObject-generated harmful factors

Solution Approach 1:

The guide member acts as a light-guiding intermediary that works in conjunction with the black matrix. It directs light through the main emission path before light reaches the black matrix boundary, reducing the intensity of light that would otherwise diffract at the boundary while still allowing the black matrix to provide contrast enhancement.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 solution effectively prevents light mixture between pixels, enhancing image quality by ensuring light is directed correctly, even when substrates are distant.

Implementation Method 1

a guide member that is disposed in a boundary between pixel regions corresponding to the light-emitting elements and guides light emitted from each of the light-emitting elements between the first substrate and a second substrate facing the first substrate in a main light emission direction

Methodology Applied

Scientific EffectLight guidance: Waveguide (optics)

Data Source

PatentUS10048427B2Display device, method of manufacturing display device, and electronic apparatus

Publication Date: 2018.08.14 MAGNOLIA BLUE CORP

AI summary

There is provided a display device including a plurality of light-emitting elements that are disposed on a first substrate, and a guide member that is disposed in a boundary between pixel regions corresponding to the light-emitting elements and guides light emitted from each of the light-emitting elements between the first substrate and a second substrate facing the first substrate in a main light emission direction of each of the light-emitting elements.