Backlight Unit Detachment via Notched Mounting Case Sidewall
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Solution Overview
Problem
Existing liquid crystal devices face difficulties in easily detaching the backlight unit from the mounting case, especially when foreign matter is sandwiched between the liquid crystal panel and the backlight unit, due to a hard-to-notice gap, leading to challenges in maintenance and repair.
Innovation Solution
The design incorporates a notched portion in the sidewalls of the mounting case, allowing for easy detachment of the backlight unit using tweezers, with a depth less than the thickness of the backlight unit to minimize damage and prevent light leakage, and a detachable adhesive tape for secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the backlight unit is firmly fixed to the mounting case using support portions, then the structural stability is improved, but the ease of detachment deteriorates
Solution Approach 1:
The mounting case sidewall is segmented by forming a notched portion that divides the sidewall into distinct regions. This segmentation creates a natural detachment point where the backlight unit can be accessed, allowing the structure to maintain stability during operation while enabling easy detachment when needed by inserting tweezers through the notched portion.
2Manufacturing precision
If the gap between the mounting case and backlight unit is minimized for high-accuracy design, then the manufacturing precision is improved, but the ease of detecting and measuring deteriorates
Solution Approach 1:
The notched portion is extracted from the sidewall to create an access opening. This extracted feature provides a pathway for inserting detachment tools without requiring a visible or measurable gap between the mounting case and backlight unit, thus maintaining tight manufacturing tolerances while enabling easy detection and access for detachment operations.
3Ease of operation
If the notched portion depth is increased to facilitate detachment, then the ease of operation is improved, but the risk of surface damage increases
Solution Approach 1:
The notched portion is designed with specific local dimensions where the depth is controlled to be less than the backlight unit thickness. This local quality control ensures that the notched portion is sufficient to allow insertion of tweezers for detachment while being shallow enough to prevent direct contact with and potential damage to the backlight unit surface during the detachment process.
Data Source
AI summary
An electro-optical device includes an electro-optical panel, a backlight unit and a mounting case. The mounting case includes a sidewall and a support portion provided inside the sidewall. The support portion has a notch portion that faces to the side surface of the backlight unit.