Backlight Module Light Guide Plate Ear Notch Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The mechanical stability of backlight modules in liquid crystal displays is compromised due to gaps between the light guide plate's ears and the supporting frame, which affects the overall assembly and performance of the module.
Innovation Solution
Incorporating notches in the supporting frame that match the height of the ears on the light guide plate, allowing the ears to be securely received and ensuring the masking tape adheres to the top surfaces of both, thereby stabilizing the module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the light guide plate is made very thin to achieve a compact backlight module, then the thickness of the backlight module is reduced, but the mechanical stability of the assembly is compromised due to gaps between the ears and the supporting frame
Solution Approach 1:
The first ear of the light guide plate is nested within the notch of the supporting frame, with the top surface of the ear coplanar with the top surface of the frame. This nesting arrangement eliminates gaps and allows the masking tape to effectively bridge the ear and the front surface, thereby maintaining mechanical stability while keeping the light guide plate thin.
2Length of moving object
If the plastic frame is made with minimum thickness to maintain compactness, then the overall size is reduced, but the mechanical strength of the frame is insufficient to provide stable support
Solution Approach 1:
The notch is pre-formed in the supporting frame at the appropriate position and depth, allowing the ear of the light guide plate to be received and secured in advance. This preliminary structural preparation ensures that the masking tape can effectively bridge the ear and the front surface, providing mechanical stability without requiring the frame to be thicker.
3Stability of the object's composition
If the masking tape is applied to cover the gap between the ear and the frame, then the mechanical stability is improved, but the adhesive area is reduced because the tape cannot effectively bridge the gap
Solution Approach 1:
The top surface of the first ear is made coplanar with the top surface of the supporting frame within the notch, creating a locally optimized adhesion zone. This allows the masking tape to effectively bridge the ear and the front surface of the frame, maximizing the adhesive area and improving mechanical stability simultaneously.
Data Source
AI summary
An exemplary backlight module (11) includes a frame (17), and a light guide plate (16) received in the frame. The frame includes a supporting board (170) defining a notch (174) therein. The light guide plate includes a light incident surface (160), a side surface (166), and a first ear (168) outwardly extending from the side surface. The first ear is received in the notch, and a top surface of the first ear is coplanar with a top surface of the supporting board at the notch.