Light Guide Plate with Integrated Alignment Pins for Ultra-Thin Display Assembly

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Solution Overview

Problem

Existing display module designs face challenges in achieving ultra-thin, high-brightness, and low-power consumption designs, leading to difficulties in reducing module thickness, increased assembly complexity, and higher production costs due to limitations in material thickness and adhesive frame structures.

Innovation Solution

A light guide plate with a flat plate portion and a fixed portion that forms an installation concave for optical film materials, featuring gap structures for light source particles and raised alignment pins for secure fixation, which replaces traditional adhesive frames, allowing for ultra-thinning and efficient assembly of display devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Length of moving object

If traditional adhesive frames are used to assemble display modules, then structural support and component fixation are achieved, but module thickness cannot be reduced further and assembly complexity increases

Engineering Contradiction:

Improvemodule thicknessVSAvoidassembly complexity

Core Design Contradiction:

Length of moving objectVSDevice complexity

Solution Approach 1:

The patent integrates the light guide plate, alignment pins, and fixing structures into a single unified component. The light guide plate includes integrated alignment pins that protrude into the凹槽 to fix optical films, eliminating the need for separate adhesive frames and multiple assembly steps, thus reducing both thickness and assembly complexity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The light guide plate serves multiple functions simultaneously: it guides light distribution, provides structural support through its rigid plate portion, and fixes optical films through integrated alignment pins. This multi-functionality replaces what previously required separate adhesive frames and fixing mechanisms, reducing overall module thickness

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If expensive adhesive frames and multiple molds are used for assembly, then reliable component fixation is achieved, but production costs increase

Engineering Contradiction:

Improvecomponent fixation reliabilityVSAvoidproduction cost

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent extracts and eliminates the expensive adhesive frame component from the assembly. Instead, it uses integrated alignment pins made from the same material as the light guide plate, produced in the same injection molding process, thereby removing the need for separate expensive molds and reducing production costs while maintaining fixation reliability

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The alignment pins are produced as integral parts of the light guide plate through a single injection molding process, eliminating the need for separate expensive molds for adhesive frames. This approach uses a cost-effective monolithic structure instead of multiple expensive components and molds

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Ease of operation

If optical films are not properly aligned and fixed, then assembly is simpler, but optical efficiency is reduced due to misalignment

Engineering Contradiction:

Improveassembly simplicityVSAvoidoptical efficiency loss

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The alignment pins are pre-formed as integral parts of the light guide plate during injection molding, with predetermined positions and dimensions. This preliminary action ensures that optical films are automatically aligned correctly during assembly, preventing misalignment and optical efficiency loss while maintaining assembly simplicity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces complex mechanical alignment and fixation systems with a simplified pin-based system. The alignment pins use straightforward geometric features (protrusions fitting into recesses) to ensure precise positioning of optical films, eliminating the need for complex alignment mechanisms while maintaining optical efficiency

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS10605973B2Light guide plate and display device

Publication Date: 2020.03.31 BOE TECHNOLOGY GROUP CO LTD

AI summary

Disclosed are a light guide plate and a display device. The light guide plate includes a flat plate portion and a fixed portion, the fixed portion is arranged around a periphery of the flat plate portion, forms an installation groove for placing optical films in cooperation with the flat plate portion, a surface for forming a bottom of the installation groove in the flat plate portion forms a light emergence surface of the light guide plate; gap structures corresponding to light source particles of a light bar are formed at a first side of the fixed portion, and bottoms of the gap structures form a light incidence surface of the light guide plate which is perpendicular to the light emergence surface; and a surface of the flat plate portion back on to the installation groove forms an installation surface for installing a reflection sheet and the light bar.