Light Source Unit Fixing Member with Embedded Wiring

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Solution Overview

Problem

Conventional light source units in LCD devices are prone to detachment, leading to reduced luminance and potential short circuits due to the movement of the printed circuit board, which causes the adhesive tape to detach and allows light to leak or come into contact with peripheral components.

Innovation Solution

A light emitting device featuring a rigid nonconductive light source fixing member with integrated wiring and an optical waveguide, where the wiring is not exposed on the outer surface, and a terminal unit connects to an external power supply, preventing direct contact and ensuring stable fixation of light sources without the need for adhesive tape, thus preventing light leakage and short circuits.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If adhesive tape is used to attach the printed circuit board to the mold frame, then the light source unit can be assembled, but the printed circuit board may become detached due to movement, causing light leakage and reduced luminance

Engineering Contradiction:

Improveassembly easeVSAvoidfixation reliability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent merges the printed circuit board with the light source fixing member by integrating the wiring lines directly into the fixing member structure. This eliminates the separate adhesive tape attachment step and creates a unified, stable assembly where the circuit board cannot detach, resolving the contradiction between assembly ease and fixation reliability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent introduces a groove structure as an intermediary mechanical feature that physically engages the printed circuit board with the mold frame. This groove acts as a mediator that provides positive mechanical retention, preventing board movement and detachment while maintaining simple assembly procedures.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the wiring line is directly exposed on the outer surface for easy connection, then electrical connection is simplified, but the light source may come into contact with peripheral components causing short circuits

Engineering Contradiction:

Improveelectrical connection easeVSAvoidshort circuit risk

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent embeds the wiring lines within the internal structure of the light source fixing member, nesting the electrical connections inside the protective housing. This allows electrical connections to be made through designated terminal openings while the main wiring remains protected, eliminating short circuit risks while maintaining connection ease.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The patent uses terminal openings and internal wiring pathways as intermediaries between the external power supply and the light sources. These intermediaries provide controlled access points for electrical connection while isolating the main wiring from peripheral components, preventing short circuits.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the printed circuit board is allowed to move for flexibility, then assembly and disassembly become easier, but the adhesive tape detaches and light leakage occurs

Engineering Contradiction:

Improveassembly flexibilityVSAvoidstructural stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent combines the printed circuit board with the light source fixing member into a single integrated unit. This merging eliminates the relative movement between separate components while maintaining the ability to assemble and disassemble the entire unit as one piece, resolving the contradiction between assembly flexibility and structural stability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent incorporates the wiring lines and electrical connections during the initial formation of the light source fixing member, before final assembly. This preliminary integration ensures that no separate movement or adjustment of the circuit board is needed during assembly, maintaining both flexibility and stability.

Inventive Principle:

Principle #10Preliminary action

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 enhances luminance by maintaining light emission directionality and prevents short circuits, ensuring the light sources remain securely positioned and resistant to external impacts, improving the overall performance and reliability of the light emitting device.

Implementation Method 1

an optical waveguide that guides light emitted from the at least one light source

Methodology Applied

Scientific EffectTotal internal reflection: Total Internal Reflection

Data Source

PatentUS8303156B2Light source unit, light emitting device, and display device having same

Publication Date: 2012.11.06 SAMSUNG DISPLAY CO LTD

AI summary

A light emitting device includes at least one light source, a rigid nonconductive light source fixing member having at least one fastening unit that includes a plurality of sections defining spaces where the at least one light source is fixed, a wiring line, which transmits a driving signal to the at least one light source, wherein the wiring line is formed in the light source fixing member such that the wiring line is not directly exposed on the outer surface of the light source fixing member, and an optical waveguide that guides light emitted from the at least one light source.