Segmented Light Guide Plate Positioning Column for Narrow Border Displays
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Solution Overview
Problem
Existing light guide plate-positioning columns in backlight modules face challenges in achieving both sufficient positioning strength for the light guide plate and precise positioning of the optical film, leading to potential breakage or inadequate narrow border designs due to inconsistent cross-sectional sizes.
Innovation Solution
A light guide plate-positioning column with distinct upper and lower sections, where the first positioning body for the light guide plate has a larger cross-sectional area than the second positioning body for the optical film, ensuring both strength and precision through a fixed connection, and optionally incorporating a stopper for additional stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a positioning column with a large cross-section area is used to ensure positioning strength of the light guide plate, then the positioning strength is improved, but the fine positioning of the optical film cannot be achieved, resulting in a large distance from the edge of the visible area to the edge of the optical film
Solution Approach 1:
The positioning column is segmented into two distinct parts: an upper positioning column for positioning the light guide plate and a lower positioning column for positioning the optical film. This segmentation allows each part to have optimized dimensions for its specific function, resolving the contradiction between strength and precision.
Solution Approach 2:
Different parts of the positioning column have different cross-sectional areas tailored to their specific positioning requirements. The upper positioning column has a larger cross-section for strength, while the lower positioning column has a smaller cross-section for precision, applying local quality to different sections.
2Manufacturing precision
If a positioning column with a small cross-section area is used to achieve fine positioning of the optical film, then the fine positioning is improved, but the positioning strength of the light guide plate becomes insufficient, leading to relative displacement or collision during movement
Solution Approach 1:
The positioning column is divided into upper and lower segments with different dimensions. The upper segment provides strong positioning for the heavy light guide plate, while the lower segment enables precise positioning of the optical film, eliminating the trade-off between strength and precision.
Solution Approach 2:
Each segment of the positioning column is designed with locally optimized properties: the upper segment has larger dimensions for strength, while the lower segment has smaller dimensions for precision, allowing both requirements to be satisfied simultaneously.
3Device complexity
If the same positioning column structure is used for both light guide plate and optical film positioning, then the device complexity is reduced, but it cannot satisfy both positioning strength and fine positioning requirements simultaneously
Solution Approach 1:
The positioning column is segmented into functionally distinct upper and lower parts, allowing each to be optimized for its specific component (light guide plate or optical film). This segmentation enables the structure to adapt to different positioning requirements while remaining a single integrated component.
Solution Approach 2:
The positioning column serves multiple functions through its segmented design: the upper segment positions the light guide plate while the lower segment positions the optical film. This multi-functionality allows a single component to satisfy diverse positioning requirements.
Data Source
AI summary
The present disclosure provides a light guide plate-positioning column, a backlight module and a display apparatus. The column comprises a first positioning body for positioning a light guide plate and a second positioning body for positioning an optical film; the second positioning body is located on a side of the first and fixedly connected to it; a projection of the first positioning body in a direction from it toward the second completely covers that of the second, and a projection area of the first positioning body is greater than that of the second; wherein in the direction, a surface on a side of the first positioning body close to the second does not extend beyond a surface on a side of the plate close to the second. Both the requirements of the positioning strength of the plate and the fine positioning of the film can be met.