Backlight Support Pin Structure for Quiet Diffuser Stability
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Solution Overview
Problem
Direct type backlight modules experience noise and detachment issues due to gaps between support pins and diffusers caused by manufacturing or assembly tolerances, especially under vibrations or collisions, particularly in automotive displays.
Innovation Solution
A support pin design with a base and support structure that clamps the back plate and light board, using a cushion member to absorb impacts and an elastic member to enhance clamping, eliminating the need for screws and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If support pins are used to support the diffuser, then the diffuser is prevented from deforming, but gaps between support pins and diffuser cause abnormal noise under vibration or collision
Solution Approach 1:
A cushion member is introduced as an intermediary element between the support pin and the diffuser. This cushion member fills the gap that exists due to manufacturing tolerances, preventing direct contact and collision between the support pin and diffuser during vibration or impact, thereby eliminating abnormal noise while maintaining diffuser stability.
Solution Approach 2:
The cushion member is pre-installed on the support pin before assembly with the diffuser. This beforehand cushioning ensures that when the diffuser is positioned on the support pin, the cushion member is already in place to absorb potential impacts and prevent noise generation from direct contact.
2Stability of the object's composition
If support pins are used to support the diffuser, then the diffuser is prevented from deforming, but the support pins are easily detached from the light board by vibration or collision
Solution Approach 1:
The support pin structure is designed with resilient arms that can dynamically deflect and absorb impact forces. When vibration or collision occurs, the resilient arms can bend elastically to accommodate the force, preventing the support pin from detaching while still maintaining support for the diffuser.
Solution Approach 2:
The support pin is constructed using composite materials or a composite structure combining rigid and flexible elements. The resilient arms provide flexibility and shock absorption, while the overall structure maintains sufficient rigidity to hold the diffuser in position, creating a balanced design that resists both detachment and noise.
3Strength
If screws or adhesives are used to fix the light board to the back plate, then the light board is securely fixed, but the device complexity and manufacturing cost increase
Solution Approach 1:
The support pin is designed to perform multiple functions simultaneously: it supports the diffuser, fixes the light board to the back plate, and provides positioning. By merging these functions into a single component, the need for separate screws or adhesives is eliminated, reducing device complexity while maintaining secure fixation.
Solution Approach 2:
The support pin is designed as a multi-functional element that can support, fix, and position different components. This universal design allows a single component to replace multiple specialized fastening elements, simplifying the overall structure and reducing manufacturing steps.
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
The solution effectively secures the back plate and light board, reduces manufacturing costs, minimizes noise, and prevents detachment, enhancing stability and durability.
Implementation Method 1
The cushion member is disposed at a top portion of the support structure. The diffuser abuts against the cushion member.
Implementation Method 2
the elastic member is sleeved on the support structure and located in the second accommodating recess, and two ends of the elastic member respectively abut against the outer surface of the back plate and the base
Data Source
AI summary
A display device includes a backlight module and a display panel disposed on the backlight module. The backlight module includes a back plate, a light board, a support pin, a cushion member and a diffuser. The light board is disposed on an inner surface of the back plate. The support pin includes a base and a support structure. The support structure protrudes from the base. The back plate and the light board are clamped between the base and the support structure. The cushion member is disposed at a top portion of the support structure. The diffuser is disposed above the light board and the back plate at a certain distance. The diffuser abuts against the cushion member. In an embodiment, the backlight module may include an elastic member sleeved on the support structure. Two ends of the elastic member respectively abut against the back plate and the base.