Backlight Module Positioning Members for Light Guide Plate Stability
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Solution Overview
Problem
In backlight modules, the lack of mutual constraint between the frame and the light guide plate leads to relative movement in the length direction of the light incident surface, causing deviations in the light source position and affecting light exiting efficiency.
Innovation Solution
The use of positioning members with first and second positioning portions, where the second positioning portion is located on the light incident surface and the first on the frame, mutually constraining the light guide plate and frame to prevent movement, and potentially using transparent materials to enhance light incidence efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If positioning members are disposed on the frame to define light source position, then the light source position can be controlled, but relative movement between the light guide plate and frame occurs in the length direction of the light incident surface
Solution Approach 1:
The positioning member is divided into two separate positioning portions: a first positioning portion disposed on the frame and a second positioning portion disposed on the light guide plate. This segmentation allows each portion to be independently positioned while maintaining relative constraint, preventing relative movement between the light guide plate and frame in the length direction of the light incident surface.
Solution Approach 2:
The positioning member acts as an intermediary component that connects the frame and the light guide plate through its two positioning portions. By incorporating the positioning member with portions on both components, the relative position between the frame and light guide plate is constrained, preventing unwanted movement while maintaining the light source position definition function.
2Productivity
If the second positioning portion is made of transparent material, then light incidence efficiency is improved, but positioning constraint strength may be reduced
Solution Approach 1:
The second positioning portion is designed with local quality characteristics suitable for its function on the light guide plate surface. By using transparent material specifically for this portion, the design optimizes light transmission properties while the overall positioning member structure maintains sufficient positioning constraint strength through its configuration and the first positioning portion's contribution.
Data Source
AI summary
The present disclosure provides a backlight module and a display device, and relates to the field of display technology. The backlight module includes a light guide plate, a light source, a frame portion adjacent to a light incident surface of the light guide plate, and one or more positioning members for defining a position of the light source. The at least one positioning member includes a first positioning portion and a second positioning portion. The first positioning portion is located on a surface of the frame portion adjacent to the light incident surface. The second positioning portion is located on the light incident surface. The second positioning portion and the first positioning portion are mutually constrained to restrict relative movement of the light guide plate and the frame portion in a length direction of the light incident surface.