Flexible PCB Light Source for Curved Displays
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Solution Overview
Problem
Conventional curved displays require different light bar circuit boards for varying curvatures, limiting compatibility and versatility of TOP LEDs, and increasing production costs.
Innovation Solution
A light source module utilizing a flexible printed circuit board with side-emitting LEDs, allowing for elastic deformation to accommodate displays with different curvatures, featuring a connector with parallel anode and cathode pins for independent LED control and improved heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TOP LEDs are used in conventional curved displays with different curvatures, then each display requires a customized light bar circuit board, but this reduces versatility and increases production costs
Solution Approach 1:
The patent applies universality by designing a light source module that can be used across multiple display curvatures. The flexible printed circuit board allows the same light source module to adapt to different curvature requirements, eliminating the need for customized circuit boards for each display type.
Solution Approach 2:
The patent uses a flexible printed circuit board instead of a rigid circuit board. This flexible substrate allows the light source module to bend and adapt to different curvatures while maintaining electrical connectivity, enabling one module design to serve multiple display configurations.
2Adaptability or versatility
If a flexible printed circuit board is used to accommodate different curvatures, then versatility is improved, but manufacturing precision and assembly difficulty increase
Solution Approach 1:
The patent applies preliminary action by pre-forming windowing grooves in the flexible printed circuit board at precise positions before LED assembly. These grooves serve as pre-prepared mounting locations that guide LED placement and ensure accurate positioning, reducing assembly difficulty despite the flexibility of the substrate.
Solution Approach 2:
The patent incorporates curvature design into the flexible printed circuit board to match the expected display curvature. By pre-bending or pre-shaping the flexible substrate, the board maintains its form during assembly, making it easier to bond LEDs at precise positions while still allowing adaptation to different curvature requirements.
3Temperature
If side-emitting LEDs are arranged along the central axis on a flexible circuit board, then heat dissipation is improved, but the wiring complexity increases
Solution Approach 1:
The patent transitions from traditional vertical LED mounting to horizontal side-emitting LED arrangement along the central axis of the flexible circuit board. This dimensional change allows heat to dissipate along the length of the board rather than being concentrated in a vertical direction, improving thermal management while the flexible substrate handles the wiring routing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances versatility and cost-effectiveness by enabling a single light source module to be used across various curvatures, with improved heat dissipation and zone control of LEDs, while maintaining large board width and low line resistance for complex wiring.
Implementation Method 1
The flexible printed circuit board extends along a central axis. The plurality of side-emitting LEDs are sequentially arranged along the central axis and bonded to the flexible printed circuit board
Implementation Method 2
The metal pin is welded to the copper layer of the flexible printed circuit board through a solder paste
Implementation Method 3
A light-emitting surface of one side-emitting LED of the plurality of side-emitting LEDs is perpendicular to a bonding surface of the flexible printed circuit board
Data Source
AI summary
Provided are a light source module and a backlight display module. The light source module includes a flexible printed circuit board and a plurality of side-emitting LEDs. The flexible printed circuit board extends along a central axis. The plurality of side-emitting LEDs are sequentially arranged along the central axis and bonded to the flexible printed circuit board, and a light-emitting surface of one side-emitting LED of the plurality of side-emitting LEDs is perpendicular to a bonding surface of the flexible printed circuit board.