Backlight Frame Structure with Stopper Portion for Light Leakage Control
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Solution Overview
Problem
Conventional backlight modules experience light leakage due to holes in the frame, which affects uniform light distribution and requires costly and time-consuming tape application to mitigate, increasing manufacturing costs and risks of tape peeling off.
Innovation Solution
A frame structure with fixing structures featuring first and second protrusions and a stopper portion, where the lengths of these components are designed to effectively block light paths, reducing light leakage without the need for non-transparent tape, by ensuring L1>α≧0 and L2>β≧0, thereby preventing light emission through the sides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If holes are formed on the frame for positioning optical films, then the optical films are prevented from shifting, but light leakage occurs at the sides of the backlight module
Solution Approach 1:
The frame is divided into multiple segments including the frame body, first protrusion, second protrusion, and stopper portion. Each segment serves a specific function: the protrusions provide positioning while the stopper portion blocks light leakage paths, thereby resolving the contradiction between positioning stability and light leakage prevention
Solution Approach 2:
The stopper portion acts as an intermediary element between the first and second protrusions. It fills the gap between protrusions to block light leakage paths that would otherwise pass through the positioning structures, allowing both positioning and light blocking functions to coexist
2Object-generated harmful factors
If non-transparent adhesive tape is used to block light leakage, then light leakage is reduced, but manufacturing cost and time increase and tape peeling risk arises
Solution Approach 1:
The frame structure is designed to be self-sufficient by integrating the stopper portion directly into the frame body. The stopper portion automatically blocks light leakage paths through its geometric design (with overlap lengths α and β), eliminating the need for external adhesive tapes and associated manufacturing processes
Solution Approach 2:
The light blocking function is merged with the positioning function by integrating the stopper portion with the first and second protrusions into a single frame structure. This combination eliminates the need for separate light-blocking components and simplifies the manufacturing process
Data Source
AI summary
A frame structure includes a frame body and fixing structures. The frame structure has an inner edge, an end edge and an outer edge. The fixing structures are disposed on two opposite sides of the frame body respectively, wherein each fixing structure includes a first protrusion, a second protrusion and a stopper portion. One end of the first protrusion or one end of the second protrusion connects to the inner and the end edges to form a containing cavity. The stopper portion is located inside the containing cavity and arranged in parallel to the first and the second protrusions. The lengths of the first and the second protrusions are respectively “L1” and “L2”. The overlap length between the stopper portion and the first protrusion is “α,” the overlap length between the stopper portion and the second protrusion is “b,” L1>α≧0, and L2>β≧0.