Bent Polarizer Clips for Display Panel Fastening

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Solution Overview

Problem

Conventional display devices face challenges with reworking difficulties due to the use of double-sided tape, light leakage, and structural deformation caused by thermal expansion, especially when using black sealants for edge fixation.

Innovation Solution

The display device employs upper and lower polarizers bent oppositely to fasten the display panel, eliminating the need for a black sealant and allowing for thermal expansion without deformation, while overlapping polarizers reduce light leakage and simplify the design process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If double-sided tape is used to fasten the display panel, then the panel can be secured to the backlight module, but reworking becomes difficult and fragments and remnant glue are easily caused

Engineering Contradiction:

Improvefastening strengthVSAvoidreworking feasibility

Core Design Contradiction:

StrengthVSEase of repair

Solution Approach 1:

The patent removes the double-sided tape from the fastening system entirely. Instead, the polarizers themselves are bent to form clips that mechanically engage with the backlight module, eliminating the need for adhesive materials and enabling easy reworking by simply detaching the polarizer clips.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent replaces the chemical bonding mechanism of double-sided tape with a mechanical clipping system formed by bending the polarizers. This mechanical engagement allows for easy assembly and disassembly without leaving residue, solving both the fastening strength and reworking feasibility requirements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If black sealant is coated on the edge of the display panel to prevent light leakage, then light leakage is reduced, but a coating process is added and the black sealant easily falls off

Engineering Contradiction:

Improvelight leakage preventionVSAvoidcoating process

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent eliminates the black sealant coating process entirely. The bent polarizers themselves form the sealing structure at the edges, providing light leakage prevention through their geometric configuration rather than through a separate coating material.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The polarizers serve multiple functions: they perform their primary optical function of polarizing light, and simultaneously their bent portions form mechanical clips for fastening and sealing edges to prevent light leakage. This multi-functionality eliminates the need for separate black sealant coating.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Stability of the object's composition

If black sealant is used to fasten the edge of the display panel, then the panel structure is stabilized, but the weak part in the middle structure is easily arched and deformed during thermal expansion

Engineering Contradiction:

Improvestructural stabilityVSAvoidresistance to thermal deformation

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The patent divides the fastening function into multiple discrete polarizer clips distributed along the edges of the display panel. This segmentation allows each clip to independently accommodate thermal expansion while maintaining overall structural stability, preventing arching and deformation of the middle structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The bent polarizers provide mechanical constraint that allows controlled thermal expansion parameters. The structure can expand and contract within defined parameters during temperature changes without causing arching or deformation, maintaining reliability under thermal stress.

Inventive Principle:

Principle #35Parameter changes

4Object-affected harmful factors

If upper and lower polarizers are bent oppositely and overlap, then light leakage probability is reduced and design flexibility is improved, but the structure becomes more complex

Engineering Contradiction:

Improvelight leakage probabilityVSAvoidpolarizer bending structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The bent polarizers simultaneously achieve multiple goals: they fasten the panel to the backlight module, seal the edges to prevent light leakage, and provide structural support. This multi-functionality justifies the increased structural complexity by eliminating separate components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS10288932B2Display device

Publication Date: 2019.05.14 AU OPTRONICS CORP

AI summary

A display device includes a display panel having a first surface with a first side, a second surface parallel and opposite to the first surface and having a second side opposite to the first side, and an end surface connecting the first side and the second side, a first polarizer disposed on the first surface, and a second polarizer disposed on the second surface. The first polarizer and the second polarizer respectively protrude from the first side and the second side and are bent oppositely to form a first bent portion and a second bent portion; and the first bent portion and the second bent portion at least partially overlap, and the overlapping portion at least partially covers the end surface.