LED Line Layout to Prevent PCB Soldering Skew in Displays
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Solution Overview
Problem
In the manufacturing of display devices, LEDs can deviate from their predetermined fixation positions due to attraction by uncovered lines on the PCB during soldering, leading to poor yield rates and increased material consumption.
Innovation Solution
The LEDs are arranged in specific directions with respect to each other and connected by lines extending in opposite directions to counteract the attraction forces, using a line structure that provides reference voltages to the electrodes, thereby maintaining proper positioning and reducing material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If lines in the solder mask are perpendicular to the electrodes of the LEDs, then the soldering process is simplified, but the LEDs are attracted by solder and deviate from predetermined fixation positions during soldering
Solution Approach 1:
The patent applies asymmetry by arranging lines parallel to LED electrodes rather than perpendicular, creating an asymmetric configuration that prevents solder attraction while maintaining manufacturing simplicity. This directional arrangement ensures solder flows away from LED positions during the soldering process.
Solution Approach 2:
The patent implements preliminary anti-action by pre-positioning lines in a configuration that counteracts the harmful solder attraction force before soldering occurs. The parallel arrangement of lines relative to electrodes creates a protective configuration that prevents LED deviation during the soldering process.
2Adaptability or versatility
If the polarities of multiple LEDs are not well-organized, then the arrangement of lines becomes complicated and more vias are required, but this leads to increased material consumption
Solution Approach 1:
The patent applies universality by designing a line arrangement system that serves multiple functions: it connects LEDs with various polarity configurations, provides reference voltages, and maintains organized routing. The parallel line configuration can accommodate different LED polarity arrangements without requiring additional vias or materials.
Solution Approach 2:
The patent utilizes parameter changes by varying the orientation and positioning of lines relative to different LED groups, allowing the same basic line structure to adapt to different polarity configurations. This enables flexible LED arrangement without increasing material consumption.
Data Source
AI summary
The present disclosure provides a display device, including first to fourth LEDs, a line structure, and first to fourth lines. The second LED is arranged in a first direction corresponding to the first LED. The fourth LED is arranged in a second direction corresponding to the third LED. The line structure includes first to third line segments. The first line is coupled to the first LED. The second line is coupled to the second LED. The third line is coupled to the third LED. The fourth line is coupled to the fourth LED. A portion of the first line and a portion of the second line are in parallel with the first line segment, a portion of the third line is in parallel with the second line segment, and a portion of the fourth line is in parallel with the third line segment.