Guide Member for Display Device Circuit Board Fastening
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Solution Overview
Problem
In liquid crystal display (LCD) devices, the existing methods for fastening the driving circuit board and protection member often result in inconsistent gaps due to flatness differences in the bottom chassis, leading to potential rattle noise during screw tightening, and require additional apparatus for securement.
Innovation Solution
A display device design that incorporates a guide member coupled to the bottom chassis, featuring a support portion, coupling portions, and a gap maintaining portion to securely fasten the driving circuit board and protection member without additional apparatus, using a guide member made from materials like polycarbonate or acrylic resin, which is integrally formed through injection molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the protection member is fastened using screws to the bottom chassis, then the protection member can be securely attached, but rattle noise occurs due to flatness differences of the bottom chassis causing non-constant gaps
Solution Approach 1:
A guide member is introduced as an intermediary component between the protection member and the bottom chassis. The guide member includes a support portion that contacts the bottom chassis, a coupling portion that fastens to the bottom chassis, and fastening portions that secure the protection member. This intermediary structure eliminates direct screw contact between the protection member and the uneven bottom chassis surface, preventing rattle noise while maintaining secure attachment.
2Reliability
If additional fastening apparatus are used to secure the protection member, then securement is achieved, but device complexity and material costs increase
Solution Approach 1:
The guide member integrates multiple functions into a single component: it provides structural support through the support portion, achieves secure attachment to the bottom chassis through the coupling portion, and fastens the protection member through the fastening portions. This consolidation eliminates the need for separate fastening apparatus, reducing device complexity and material costs while maintaining reliable securement.
3Reliability
If screws are tightened to fasten the protection member, then attachment is achieved, but rattle noise is generated during tightening
Solution Approach 1:
The guide member serves as a mediator that absorbs the mechanical stress and flatness variations of the bottom chassis. The coupling portion fastens to the bottom chassis while the support portion provides a stable mounting surface, preventing the transmission of tightening forces that would cause rattle noise. This allows secure attachment without generating harmful noise during the tightening process.
Data Source
AI summary
A display device includes a display panel. A bottom chassis is dimensioned and positioned to support the display panel. A driving circuit board is positioned below a back surface of the bottom chassis facing away from the display panel. A protection member is positioned on the driving circuit board. A guide member is coupled to the bottom chassis and fastens the driving circuit board and the protection member to each other.