Flexible Circuit Board Welding Structure for Light Bar Pulling Force
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing flexible circuit boards in liquid crystal display devices often experience breakage at welding points due to limited bearable pulling force when bent, leading to nonuniform light emission and potential 'cold joint' issues in backlight modules.
Innovation Solution
Incorporating auxiliary welding portions and pads on both the flexible circuit board and light bar to enhance the firm fixing between the two components, thereby increasing the bearable maximum pulling force and preventing breakage at effective welding points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the flexible circuit board is bent to facilitate assembly, then the assembly process becomes easier, but the welding positions experience pulling force that causes breakage
Solution Approach 1:
The patent divides the welding structure into multiple independent welding positions along the flexible circuit board. By segmenting the welding connections, the pulling force generated during bending is distributed across multiple points rather than concentrated at a single location, reducing the stress on each individual welding position and preventing breakage while maintaining assembly flexibility
Solution Approach 2:
The patent applies different structural characteristics to different regions of the flexible circuit board. The welding positions are designed with specific local features (such as reinforced welding areas or optimized trace layouts) that enhance their mechanical strength and resistance to pulling forces, while other regions maintain the flexibility needed for bending during assembly
2Device complexity
If limited welding positions are used between flexible circuit board and light bar, then the device complexity is reduced, but the bearable maximum pulling force is limited causing cold joint breakage
Solution Approach 1:
The welding structure is segmented into multiple discrete welding positions distributed along the flexible circuit board. This segmentation allows the total pulling force to be distributed across multiple connection points, increasing the overall bearable maximum pulling force without requiring a single complex welded joint, thus maintaining relatively simple device complexity
Solution Approach 2:
The patent combines multiple welding positions into a unified welding system that works collectively to bear the pulling force. By merging the functionality of multiple simple welding points, the system achieves high overall strength and reliability without the complexity of a single large-scale welding structure
Data Source
AI summary
The present disclosure provides a flexible circuit board, a light bar, a light source and a display device. The light source includes a flexible circuit board having at least one effective welding portion and a light bar having at least one effective pad, the at least one effective welding portion being in one-to-one correspondence with the at least one effective pad, and the effective welding portion being fixed to a corresponding effective pad to transmit a signal loaded by itself to the corresponding effective pad. The flexible circuit board further includes at least one auxiliary welding portion, the light bar further includes at least one auxiliary pad that is in one-to-one correspondence with the at least one auxiliary welding portion, and the auxiliary welding portion is fixed to a corresponding auxiliary pad to enhance the firm fixing between the flexible circuit board and the light bar.