Inner-Outer Frame Locking Structure for Uniform Display Backlighting

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Solution Overview

Problem

Current display devices face challenges in improving image quality, luminance, and light uniformity, particularly in reducing the bluish phenomenon and optical depth, while maintaining a sturdy coupling structure.

Innovation Solution

A display device design incorporating a display panel, a rear frame, an inner frame, and an outer frame, with a coupling structure that supports the display panel and includes an optical assembly and reflective sheet to enhance light distribution and control, thereby improving luminance and light uniformity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a conventional coupling structure is used to support the display panel, then structural stability is maintained, but optical depth increases and light uniformity deteriorates

Engineering Contradiction:

Improvelight uniformityVSAvoidoptical depth

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The frame structure is divided into multiple components including a rear frame, an inner frame with coupling protrusions, and an outer frame with coupling grooves. This segmentation allows for optimized light paths while maintaining structural stability, reducing optical depth by eliminating unnecessary intermediate structures.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The coupling structure is extracted from the optical path by positioning the inner frame's coupling protrusions at the lateral sides, away from the central light transmission path. This extraction eliminates the bluish phenomenon caused by frame interference while maintaining mechanical coupling stability.

Inventive Principle:

Principle #2Taking out (Extraction)

2Illumination intensity

If the frame structure is positioned close to the display panel to reduce optical depth, then luminance improves, but coupling stability deteriorates

Engineering Contradiction:

ImproveluminanceVSAvoidcoupling stability

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The coupling structure uses asymmetric locking protrusions that extend from the lateral sides of the inner frame, with coupling grooves positioned differently on the outer frame. This asymmetric design provides stable mechanical coupling while allowing the central optical path to remain clear and close to the display panel, improving luminance without sacrificing coupling reliability.

Inventive Principle:

Principle #4Asymmetry

3Device complexity

If a simple frame coupling structure is used, then device complexity is reduced, but light control capability deteriorates

Engineering Contradiction:

Improvecoupling structureVSAvoidlight control

Core Design Contradiction:

Device complexityVSIllumination intensity

Solution Approach 1:

The frame coupling structure serves multiple functions: it provides mechanical support and stability through the locking protrusion-groove mechanism, while simultaneously controlling light distribution through the reflective sheet integrated into the rear frame. This multi-functionality achieves effective light control without significantly increasing device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11899298B2Display device comprising a locking protrusion protruding from an outer lateral side of an inner frame

Publication Date: 2024.02.13 LG ELECTRONICS INC

AI summary

Disclosed is a display device. The display device of the present disclosure includes: a display panel; a rear frame which is positioned in a rearward direction of the display panel; an inner frame which is positioned between the display panel and the rear frame, and coupled to the rear frame; and an outer frame which is coupled to the inner frame, and supports a rear surface of the display panel.