Backlight Support Pin Cushioning for Quiet, Shadow-Free Displays
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Solution Overview
Problem
Direct type backlight modules experience abnormal noise and optical performance issues due to support pins colliding with the diffuser during vibrations or collisions, especially in vehicular applications, causing deformation and dark shadows.
Innovation Solution
Incorporating a cushion layer made of soft material on the support pins, with microstructures on its periphery to absorb collision forces and reflect light, reducing noise and shadows.
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 deformation is prevented, but abnormal noise is generated during vibration or collision
Solution Approach 1:
A cushion layer made of soft material is introduced as an intermediary between the support pin and the diffuser. This cushion layer absorbs collision forces and prevents direct contact between the hard support pin and the diffuser, thereby eliminating abnormal noise while maintaining diffuser stability.
Solution Approach 2:
The cushion layer is pre-installed on the support pin before assembly with the diffuser. This beforehand cushioning prepares the support structure to absorb future vibrations and collisions, preventing noise generation while maintaining the necessary mechanical support.
2Stability of the object's composition
If support pins are used to support the diffuser, then the diffuser position is maintained, but dark shadows are caused on the diffuser
Solution Approach 1:
The cushion layer serves as an optical intermediary that is transparent to light. It allows light to pass through while maintaining the physical support function, thereby preventing dark shadows on the diffuser while keeping the diffuser properly positioned.
Solution Approach 2:
The support pin material is changed from a hard, opaque material to a soft, transparent cushioning material. This parameter change allows the support structure to become optically invisible while maintaining mechanical functionality, eliminating dark shadows.
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 cushion layer absorbs collision forces, preventing abnormal noise and improves optical performance by minimizing dark shadows, enhancing the display quality.
Implementation Method 1
The cushion layer is made of a soft material and at least covers a top of the support member... the diffuser abuts against the cushion layer
Implementation Method 2
a surface of the support member is light reflective, and the cushion layer is light transmissive
Data Source
AI summary
A display device includes a backlight module and a display panel. The display panel is disposed on the backlight module. The backlight module includes a back plate, a light source board, a plurality of support pins and a diffuser. The light source board is disposed on a surface of the back plate facing the display panel. The plurality of support pins are disposed on the light source board or the back plate. One of the support pins includes a support member and a cushion layer. The cushion layer is made of a soft material and at least covers a top portion of the support member. The diffuser is disposed above the light source board and the back plate at an optical cavity distance. The diffuser abuts against the cushion layer. In an embodiment, a periphery of each of the plurality of support pins may have a plurality of microstructures.