Backlight Module Gap Coverage With Stress-Relieving Light Supplement
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Solution Overview
Problem
Existing backlight modules in large-size displays suffer from issues such as shadows and dark lines at safety gaps due to stress transfer to reflective sheets from light plate deformations, leading to damage or loosening.
Innovation Solution
A light supplementation structure is fixedly connected to one side of the light plates at the gap, allowing relative movement with the adjacent plate to absorb stress, and incorporates through holes and protrusions for stability and safety distance, using adhesive or protrusions for connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a reflective sheet is connected to both light plates on both sides of the gap, then the gap can be covered and shadows can be reduced, but the deformation stress of light plates will be transferred to the reflective sheet causing damage or loosening
Solution Approach 1:
The reflective sheet is segmented into a fixed end connected to one light plate and a free end that extends toward the other light plate without being rigidly connected. This segmentation allows the reflective sheet to cover the gap and reduce shadows while accommodating light plate deformation through relative movement between the segments.
Solution Approach 2:
The reflective sheet transitions from a static, rigidly connected structure to a dynamic structure where the free end can move relative to the light plates. This dynamic configuration allows the reflective sheet to adapt to deformation stresses by moving rather than resisting, preventing damage while maintaining gap coverage.
2Stability of the object's composition
If safety gap is reserved between adjacent light plates, then deformation due to environmental influence can be avoided, but shadows and dark lines occur at the gap positions
Solution Approach 1:
The reflective sheet acts as an intermediary element that fills and covers the safety gap between adjacent light plates. It mediates between the need for deformation accommodation (maintaining gap) and the need to prevent shadows (covering gap), allowing light to reflect into the gap area and eliminate dark lines while preserving the physical separation.
3Strength
If the light supplementation structure is rigidly connected to both light plates, then structural stability is improved, but stress from deformation causes damage to the structure
Solution Approach 1:
The light supplementation structure is segmented into a fixed end rigidly connected to one light plate and a free end that extends toward the other light plate without rigid connection. This provides structural stability at the fixed end while allowing movement at the free end to accommodate deformation stresses.
Solution Approach 2:
The light supplementation structure incorporates flexible characteristics through its free end configuration, allowing it to bend or move with light plate deformation. This flexibility prevents stress concentration and potential damage while maintaining overall structural integrity and stability.
Data Source
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AI summary
A backlight module (20) and a display device (10) are disclosed. The backlight module (20) includes an assembled light plate (200) composed of multiple light plates (210) assembled together. There is a gap (250) between every two adjacent light plates (210). The backlight module (20) further includes a light supplementation structure (220) covering the gap (250) and having a fixed end fixedly connected with one of the two adjacent light plates (210), and a free end located on the other one of the two adjacent light plates (210).