Backlight Alignment Marks Reduce Light Leakage
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Solution Overview
Problem
Current backlight sources face issues with alignment accuracy between the light source and the light guide plate, leading to light leakage during assembly, as existing jigs and manual operations fail to ensure precise positioning.
Innovation Solution
The implementation of alignment marks on both the printed circuit board and the light guide plate, allowing for precise alignment through image capture and comparison, ensuring the light source is accurately positioned at the edge of the light guide plate to minimize light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual operation or jig is used for alignment, then assembly process is simple, but alignment accuracy is insufficient leading to light leakage
Solution Approach 1:
Alignment marks are introduced as intermediary elements on both the light guide plate and printed circuit board to mediate the alignment process. These marks serve as visual references that enable precise positioning without requiring complex jigs or manual skill, directly resolving the contradiction between simplicity and precision.
Solution Approach 2:
The alignment marks create a visual copy or representation of the desired alignment position. By capturing images of these marks and comparing their positions, the system creates a digital replica of the alignment state, enabling automated detection and correction of misalignment without complex mechanical systems.
2Manufacturing precision
If alignment marks and image capture method are implemented, then alignment accuracy is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical alignment systems with an optical and computational approach. Instead of using精密 mechanical jigs or fixtures, the system uses alignment marks visible to cameras, image capture, and computational image processing to achieve precise alignment, substituting mechanical complexity with optical and software-based solutions.
Solution Approach 2:
The alignment marks are designed to be self-aligning through visual feedback. The system captures images of the marks, automatically determines their relative positions, and guides the alignment process without requiring external intervention or complex control systems. The marks themselves provide the reference information needed for self-correction.
Data Source
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AI summary
The present invention provides a backlight source and an assembly method of the backlight source. The backlight source includes at least one light source (10), a printed circuit board (20), and a light guide plate (40) on which a second alignment mark (50) is arranged. The light source is arranged on the printed circuit board on which a first alignment mark (30) is arranged. When the first alignment mark is aligned with the second alignment mark, the light source is arranged at an edge of the light guide plate and a light emitted from the light source is guided into the light guide plate. In the backlight source and the assembly method of the backlight source, the alignment marks are arranged on the light guide plate and the printed circuit board having the light source so that the light guide plate and the light source are properly positioned.