Flexible Printed Board Power Feeding for LED Substrates
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Solution Overview
Problem
In illumination devices for local dimming, the use of a single rectangular LED substrate results in unused portions for mounting and wiring, while multiple strip-shaped substrates reduce waste but complicate wiring due to the need for multiple feeder lines, making it difficult to connect power supply circuits efficiently.
Innovation Solution
The implementation of a dish-shaped accommodating body with strip-shaped light source substrates, a flexible printed board power feeding member, and strategically positioned connectors and through-holes allows for easy power feeding and connection between the power supply unit and light source substrates, reducing wiring complexity and increasing the number of usable light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If multiple strip-shaped LED substrates are aligned to eliminate unused portions, then substrate utilization efficiency is improved, but wiring complexity increases due to the need for multiple feeder lines
Solution Approach 1:
The patent merges multiple feeder lines into a single integrated power feeding substrate that can simultaneously supply power to multiple strip-shaped LED substrates. This single substrate includes multiple connection terminals and conductive patterns that distribute power to different LED strips, thereby eliminating the need for separate feeder lines for each LED substrate while maintaining high substrate utilization efficiency through the use of multiple aligned strip-shaped substrates
2Device complexity
If a single rectangular LED substrate is used with large area, then wiring is simplified with fewer feeder lines, but unused portions increase reducing mounting efficiency
Solution Approach 1:
The patent segments a large rectangular substrate area into multiple aligned strip-shaped LED substrates, each optimized for efficient LED mounting with minimal unused portions. These segmented strips are then connected to a power feeding substrate that provides simplified wiring through integrated conductive patterns and multiple connection terminals, thus achieving both reduced waste and simplified wiring through the combination of segmentation and integration
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
This configuration simplifies wiring and enhances the illumination device's efficiency by allowing easy power distribution to multiple light source substrates, improving luminance and reducing component costs through reduced complexity and increased substrate alignment.
Implementation Method 1
a reflecting sheet which covers the one face, and the inner face of the accommodating body, and reflects light
Data Source
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AI summary
Provided is an illumination device in which wiring is easily performed, and a display device. A connector 331 and light sources 34, 34, ... are mounted on one face of a light source substrate 33. Since a power feeding member 4 is formed by using a flexible printed board, and a light source connecting portion 44 provided in the power feeding member 4 is electrically connected to the connector 331, power is fed from a power supply unit to the light source substrate 33. That is, it is possible to easily perform wiring between the power supply unit and the light source substrate 33 using the flexible printed board. Accordingly, wiring becomes simple, compared to a case of electrically connecting a plurality of feeder lines to the light source substrate 33.