Backlight Module Clamping Design for Debris Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In display device manufacturing, sharp burrs around clamping holes on the back plate of backlight modules cause debris, leading to picture defects and increased production costs due to low assembly efficiency in screw connections.
Innovation Solution
The backlight module design incorporates chamfered edges on the clamping parts of the housing frame and back plate, with specific radius ranges for the fillets, to reduce debris generation during assembly, and includes a light-shielding tape and optical film for enhanced protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If clamping holes on the back plate are used for connection, then assembly efficiency is improved, but sharp burrs are easily formed around the limiting hole causing debris generation
Solution Approach 1:
The patent applies preliminary action by adding chamfers to the clamping holes and limiting holes before assembly. This pre-processing step removes sharp burrs that would otherwise be generated during the stamping and cutting processes, preventing debris formation while maintaining the efficient clamping connection method.
Solution Approach 2:
The patent changes the geometric parameters of the clamping holes by adding chamfers with specific angle ranges (45-60 degrees) and depth specifications. This parameter modification eliminates the sharp edges that cause burr formation, allowing the clamping connection to proceed efficiently without generating harmful debris.
2Object-generated harmful factors
If screw connection is used between housing frame and back plate, then debris generation is reduced, but assembly efficiency decreases leading to high production cost
Solution Approach 1:
The patent applies preliminary action by pre-chamfering the clamping holes and limiting holes on the back plate before assembly. This eliminates the need for screw connections while preventing debris generation, thus achieving both goals simultaneously: maintaining high assembly efficiency with clamping connections while avoiding the debris problems of traditional hole formation methods.
3Productivity
If clamping connection is used between housing frame and back plate, then assembly efficiency is improved, but picture defect may occur due to debris falling into the backlight module
Solution Approach 1:
The patent applies preliminary action by adding chamfers to clamping holes and limiting holes before assembly. This pre-processing eliminates sharp burrs that would interact with clamping parts to generate debris, thereby preventing picture defects while maintaining the efficient clamping connection method.
Solution Approach 2:
The patent modifies the geometric parameters of the holes by specifying chamfer angles (45-60 degrees) and depths. This parameter change ensures that the clamping connection proceeds smoothly without generating debris that could fall into the backlight module and cause picture defects, thus maintaining both assembly efficiency and picture quality.
Data Source
AI summary
The present disclosure provides a backlight module and a display device. The backlight module comprises a housing frame and a back plate. The housing frame comprises a main body part, a panel bearing part, and a first clamping part extending toward the back plate. The back plate comprises a bottom wall, a side wall substantially perpendicular to the bottom wall, and a second clamping part extending from the side wall towards the housing frame. The first clamping part is clamped between the second clamping part and the bottom wall.