Rotatable Polarizer Fixing Unit for LCD Test Boards

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing visual inspection apparatuses for liquid crystal display (LCD) panels face difficulties in fixing large-sized polarizers, which can cause physical strain on operators and risk damage to components like cameras due to manual insertion and potential collisions.

Innovation Solution

A rotatable polarizer fixing unit with a groove on the test board allows easy insertion and positioning of the polarizer, preventing collisions with other components and simplifying the attachment process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual insertion method is used to fix polarizer, then operator can control positioning, but physical strain increases and collision risk with camera occurs

Engineering Contradiction:

Improvepolarizer attachment easeVSAvoidcollision risk and physical strain

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

A guide structure acts as an intermediary between the polarizer and the test board, providing a controlled path for polarizer insertion. The guide structure includes a guide groove and guide pin that work together to constrain the polarizer's movement trajectory, preventing collision with the camera while maintaining easy positioning for the operator.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If fixed insertion path is provided for polarizer, then collision with camera is prevented, but positioning flexibility is reduced

Engineering Contradiction:

Improvecollision preventionVSAvoidpositioning flexibility

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The guide structure serves as a mediator that provides a predetermined safe path (guide groove) for polarizer insertion, preventing collision with the camera. The guide pin works with the guide groove to ensure the polarizer follows this safe path while still allowing the operator to position it accurately at the intended location on the LCD panel.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If guide structure is added to control polarizer insertion, then collision prevention is improved, but device complexity increases

Engineering Contradiction:

Improvecollision preventionVSAvoidstructure complexity

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The guide structure is segmented into distinct functional components: a guide groove formed on the test board and a guide pin on the polarizer or polarizer holder. This segmentation allows each component to perform its specific function independently while working together to achieve collision prevention, and enables easier manufacturing and assembly compared to a monolithic complex structure.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS7889311B2Apparatus for testing liquid crystal display panel

Publication Date: 2011.02.15 LG DISPLAY CO LTD

AI summary

An apparatus for testing a liquid crystal display (LCD) panel which is capable of easily attaching or detaching a large polarizer to/from a test board when testing a large LCD panel, the apparatus comprising a test board for outputting light to an LCD panel which is placed thereon, a polarizer fixing unit rotatably formed at the test board and having a groove in which a polarizer is inserted, and a stop formed at the test board to fix the polarizer fixing unit to a desired position.