LCD Backlight Reflector Hook Fixing Mechanism

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Solution Overview

Problem

The assembly process of conventional LCD devices is complicated due to the need for screws to fix the reflector to the bottom frame, which increases complexity and difficulty.

Innovation Solution

A hook on the reflector engages with a through hole in the bottom frame, simplifying the assembly process by providing a secure and interference-based fixing mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If screws are used to fix the reflector to the bottom frame, then the reflector is securely fixed, but the assembly process becomes complicated and time-consuming

Engineering Contradiction:

Improvefixing reliabilityVSAvoidassembly complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts and eliminates the screws from the assembly system by using a snap-fit mechanism where the reflector's lower edge directly engages with the bottom frame through complementary geometric shapes (rectangular protrusion and recess), removing the need for separate fastening components and simplifying the assembly process

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The reflector and bottom frame are designed with self-aligning geometric features (rectangular protrusion on reflector matching rectangular recess in bottom frame) that automatically guide and secure the reflector in the correct position during assembly, eliminating the need for manual screw alignment and fastening operations

Inventive Principle:

Principle #25Self-service

2Strength

If screws are used to fix the reflector, then the connection is strong, but the assembly time increases

Engineering Contradiction:

Improveconnection strengthVSAvoidassembly time

Core Design Contradiction:

StrengthVSLoss of time

Solution Approach 1:

The geometric engagement features (protrusion and recess) are pre-formed as integral parts of the reflector and bottom frame during manufacturing, so that during assembly the reflector simply needs to be inserted into the bottom frame where the features automatically engage to provide secure fixation without requiring additional fastening actions

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The invention merges the reflector and bottom frame into a more integrated assembly by having the reflector's lower edge directly engage with the bottom frame through geometric interlocking, combining what were previously separate components (reflector, bottom frame, and screws) into a unified structure that maintains strength while reducing assembly steps

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS7746422B2Liquid crystal display device having hooks for fixing lamp reflector

Publication Date: 2010.06.29 INNOLUX CORP

AI summary

An exemplary liquid crystal display device (100) includes a first frame (11), a liquid crystal panel (12), a backlight unit (13) for providing uniform light for the liquid crystal panel, and a second frame (14) cooperating with the first frame to define a space receiving the liquid crystal panel and the backlight unit. The backlight unit includes a reflector (17) and a lamp (16) received in the reflector. The reflector includes a hook (175). The second frame includes a through hole (145). The hook engages in the through hole, thereby facilitating the fixing of the reflector to the second frame.