Light Bar Fixing Tape with Segmented Release Films
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Solution Overview
Problem
The existing backlight assembly process faces challenges with inaccurate positioning, low assembly efficiency, and high damage risk of the light bar, particularly due to difficulties in controlling the force during attachment and detachment, which can lead to deformation of the flexible printed circuit board and damage to light emitting diodes.
Innovation Solution
A light bar assembly with a fixing tape featuring a main body part and extension parts, where the main body part is attached to the flexible printed circuit board and the extension parts are attached to the backplane, with independent release films and chamfered structures to facilitate accurate positioning and easy detachment, eliminating the need for additional jigs and reducing damage risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the light bar is fixed using a light bar fixing tape with a single release film, then the assembly process is simplified, but the positioning accuracy and assembly efficiency deteriorate due to the need for additional jigs
Solution Approach 1:
The release film is segmented into multiple independent release films, each corresponding to a specific extension part. This allows each extension part to be detached and attached independently to the through holes on the backplane, enabling precise positioning without requiring additional jigs while maintaining a simple fixing tape structure.
2Manufacturing precision
If the light bar is attached with strong force to ensure accurate positioning, then the positioning accuracy improves, but the reliability deteriorates due to damage to light emitting diodes
Solution Approach 1:
The extension parts are pre-formed with chamfered structures at their attachment ends. These chamfered structures guide the extension parts into the through holes during assembly, enabling automatic positioning and alignment. This preliminary structural preparation ensures accurate positioning is achieved through the geometry of the components themselves rather than through excessive assembly force, thereby protecting the light emitting diodes from damage.
3Ease of repair
If the light bar is designed for easy detachment to facilitate repair, then the ease of repair improves, but the manufacturing precision deteriorates due to potential deformation of the flexible printed circuit board
Solution Approach 1:
The release film is divided into multiple independent release films corresponding to each extension part. This segmentation allows each extension part to be detached individually from the backplane without requiring forceful removal of the entire light bar assembly. The individual detachment process distributes stress away from the flexible printed circuit board, enabling easy repair while maintaining board integrity.
Solution Approach 2:
The chamfered structures are specifically located at the attachment ends of the extension parts where they engage with the through holes. This local structural feature concentrates the detachment force at specific points away from the flexible printed circuit board, allowing the extension parts to be removed cleanly without deforming the board. The local quality of the chamfered geometry facilitates controlled detachment while protecting critical components.
4Manufacturing precision
If additional jigs are used to ensure accurate positioning during assembly, then the manufacturing precision improves, but the device complexity and productivity worsen due to increased assembly steps
Solution Approach 1:
The chamfered structures are pre-formed on the extension parts during manufacturing. These chamfered geometries serve as built-in positioning features that guide the extension parts into correct alignment with the through holes on the backplane during assembly. This preliminary preparation of positioning features eliminates the need for additional positioning jigs and assembly steps, thereby maintaining high manufacturing precision while improving productivity.
Solution Approach 2:
The extension parts with chamfered structures perform their own positioning function during assembly. The chamfered geometry automatically aligns the extension parts with the through holes without requiring external positioning tools or jigs. This self-positioning capability simplifies the assembly process, removes the need for additional positioning equipment, and maintains accurate positioning, thereby improving assembly efficiency.
Data Source
AI summary
The present invention discloses a light bar assembly and a backlight. The light bar assembly includes a light bar and a light bar fixing tape arranged on a back surface of the light bar, wherein the light bar fixing tape includes a main body part and multiple extension parts extending out from the main body part, the main body part is used for being attached to a flexible printed circuit board on the light bar, and the multiple extension parts are used for being attached to a backplane of a backlight to be assembled. The backlight includes a backplane and the light bar assembly, multiple through holes one-to-one corresponding to the positions of the multiple extension parts are formed on the backplane, and each extension part can penetrate through the corresponding through hole and be attached to the back surface of the backplane.