Flexible Wiring Board Layout for Bendable Display Illumination

Solution Overview

Problem

Existing illumination devices for bendable liquid crystal display panels face challenges in achieving both flexibility and durability, as flexible printed wiring boards degrade easily under heat and light, while rigid glass epoxy substrates are difficult to bend.

Innovation Solution

The illumination device comprises a first mounting board with light emitting elements, a second mounting board with additional light emitting elements, and a flexible wiring board with lower rigidity than the mounting boards, allowing for easy bending and resistance to degradation from light and heat.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a flexible printed wiring board is used for the illumination device, then flexibility is improved, but durability deteriorates due to easy degradation from heat and light

Engineering Contradiction:

ImproveflexibilityVSAvoiddurability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The illumination device is divided into two distinct parts: mounting boards made of heat-resistant material for supporting light emitting elements, and a flexible wiring board for electrical connections. This segmentation allows each part to be optimized for its specific function - the mounting boards provide durability against heat and light while the wiring board provides flexibility for bending.

Inventive Principle:

Principle #1Segmentation

2Reliability

If a glass epoxy substrate is used for the illumination device, then durability is improved, but flexibility deteriorates making it difficult to bend

Engineering Contradiction:

ImprovedurabilityVSAvoidflexibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The illumination device is divided into two distinct parts: mounting boards made of heat-resistant material for supporting light emitting elements, and a flexible wiring board for electrical connections. This segmentation allows each part to be optimized for its specific function - the mounting boards provide durability against heat and light while the wiring board provides flexibility for bending.

Inventive Principle:

Principle #1Segmentation

3Object-affected harmful factors

If a single rigid substrate is used, then resistance to heat and light is improved, but ease of bending deteriorates

Engineering Contradiction:

Improveresistance to heat and lightVSAvoidease of bending

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The illumination device is divided into two distinct parts: mounting boards made of heat-resistant material for supporting light emitting elements, and a flexible wiring board for electrical connections. This segmentation allows each part to be optimized for its specific function - the mounting boards provide durability against heat and light while the wiring board provides flexibility for bending.

Inventive Principle:

Principle #1Segmentation

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 configuration enables the illumination device to be easily bent and maintains durability by using rigid mounting boards for light emitting elements and a flexible wiring board, preventing degradation from emitted light and heat.

Implementation Method 1

a first wiring board including a first wiring line electrically connected to at least one of the plurality of first light emitting elements and the plurality of second light emitting elements

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS11949048B2Illumination device and display device

Publication Date: 2024.04.02 MAGNOLIA WHITE CORP

AI summary

According to one embodiment, an illumination device comprises a first mounting board including a plurality of first light emitting elements, a second mounting board including a plurality of second light emitting elements, and a first wiring board including a first wiring line electrically connected to at least one of the plurality of first light emitting elements and the plurality of second light emitting elements. The first mounting board and the second mounting board extend in a first direction and are arranged along a second direction intersecting the first direction. The first wiring board is superposed on the first mounting board and the second mounting board. The first wiring board has rigidity that is lower than rigidity of each of the first mounting board and the second mounting board.