Light-Emitting Module Optical Pattern for Brightness Uniformity

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Solution Overview

Problem

Existing light-emitting modules in electronic devices often experience visual mura due to brightness differences between adjacent light-emitting elements, which affects display uniformity.

Innovation Solution

A light-emitting module design that includes a circuit substrate with light-emitting elements and an optical pattern, where a lens covers both the light-emitting elements and the optical pattern to reduce brightness variations and enhance uniformity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If light-emitting elements are arranged closely to increase pixel density, then productivity and device resolution are improved, but brightness uniformity deteriorates causing visual mura

Engineering Contradiction:

Improvepixel densityVSAvoidbrightness uniformity

Core Design Contradiction:

ProductivityVSIllumination intensity

Solution Approach 1:

A lens is introduced as an intermediary component between the light-emitting element and the optical pattern. The lens covers both the light-emitting element and the optical pattern, serving as a mediator that optically integrates light from multiple sources. This intermediary structure enables the optical pattern to receive and blend light from adjacent light-emitting elements, reducing brightness differences and visual mura while maintaining high pixel density

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The lens merges the optical functions of covering both the light-emitting element and the optical pattern into a single component. By combining these coverage functions, the lens creates an integrated optical system where light from adjacent light-emitting elements is optically blended, achieving brightness uniformity without sacrificing pixel density

Inventive Principle:

Principle #5Merging (Combining)

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

The solution effectively reduces brightness differences between adjacent light-emitting elements, improving display uniformity and performance by using an optical pattern that can include wavelength conversion materials or light-absorbing materials to absorb emitted light.

Implementation Method 1

an optical pattern disposed on the circuit substrate and adjacent to the first light-emitting element

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS11841584B2Light-emitting module and electronic device

Publication Date: 2023.12.12 INNOLUX CORP

AI summary

A light-emitting module is provided. The light-emitting module includes a circuit substrate and a first light-emitting element disposed on the circuit substrate. The light-emitting module also includes an optical pattern disposed on the circuit substrate and adjacent to the first light-emitting element. The light-emitting module further includes a lens covering the first light-emitting element and the optical pattern.