Display Device Holding Frame Attachment Member Design
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Solution Overview
Problem
The strength of holding members in display apparatuses is compromised when made compact to reduce thickness and frame width, leading to potential cracking or deformation under screw insertion, and unreliable securing.
Innovation Solution
Incorporating a metal attachment member with higher strength than the holding frame, secured to the housing via a securing hole, and featuring engageable protrusions and cutouts to accommodate thermal expansion differences, along with a bezel for additional securing through a screw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the holding member is made compact to decrease the thickness of the display apparatus and decrease the width of the frame, then the thickness and frame width are reduced, but the strength of the holding member is decreased
Solution Approach 1:
The patent applies composite materials by combining a plastic holding frame with metal attachment members. The holding frame itself is made of plastic for light weight and ease of molding, while metal attachment members are added at critical securing positions to provide the necessary strength for screw fastening without requiring the entire holding frame to be made of metal, thus maintaining compact dimensions while局部 strengthening the structure.
2Length of moving object
If the holding member is made compact to decrease the thickness of the display apparatus and decrease the width of the frame, then the thickness and frame width are reduced, but the holding member may crack or deform under screw insertion force
Solution Approach 1:
The patent segments the holding member structure into two functional parts: the main holding frame body made of plastic for compactness, and separate metal attachment members for securing. This segmentation allows each part to be optimized for its specific function - the plastic frame for size reduction and the metal attachments for reliable screw fastening without cracking or deformation.
Solution Approach 2:
The metal attachment members act as intermediaries between the plastic holding frame and the screws. Instead of directly fastening screws into the weak plastic frame, the metal attachment members provide a strong intermediate structure that can withstand screw insertion forces and secure the holding frame to the housing reliably.
3Strength
If the attachment member is formed of metal material, then the strength is increased, but the coefficient of thermal expansion differs from the holding frame
Solution Approach 1:
The patent explicitly accounts for thermal expansion differences between metal and plastic materials. The design accepts that metal attachment members and plastic holding frames will expand at different rates under temperature changes, and structures the attachment mechanism to accommodate this differential expansion without causing failure or distortion of the overall assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Ensures reliable positioning and securing of the holding frame while maintaining reduced thickness and frame width, preventing cracking and deformation, and allowing for thermal expansion adjustments.
Implementation Method 1
a predetermined gap is provided in a direction along the holding frame, between the engageable protrusion and the cutout. This deals with a situation case where the attachment member and the holding frame are formed of different materials and thus have different coefficients of thermal expansion.
Data Source
AI summary
A display device exhibits improved device thinness and device-border slimness, and makes it possible to definitively position and affix an optical-sheet holding frame. The display device is equipped with an optical sheet, a holding frame for surrounding and holding the optical sheet, and a storage housing for housing the optical sheet and the holding frame, wherein the holding member is positioned by attaching an attachment member that is stronger than the holding frame to multiple locations on the holding frame, and affixing the attachment member to the storage housing by using affixing holes formed in the attachment member.