Backlight Reflective Layer Layout Without LED Height Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing backlight device structures face manufacturing challenges due to heightwise gaps formed between LEDs and LED drivers, which affect the manufacturing process and the efficiency of light reflection.
Innovation Solution
The proposed solution involves a lighting device with a substrate having a first and second reflective layer, where the second reflective layer includes first reflective portions around the LEDs and second reflective portions around non-light-emitting parts, ensuring no heightwise gap is formed between them, and conductive portions are provided through openings in the reflective layers for connecting LEDs and non-light-emitting parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the second reflective layer is disposed around the LEDs in the conventional structure, then light reflection efficiency is improved, but a heightwise gap is formed between the LEDs and LED drivers, causing manufacturing problems
Solution Approach 1:
The second reflective layer is selectively disposed only in regions where light reflection is needed (around LEDs), while intentionally leaving gaps in regions where LED drivers will be mounted. This local differentiation allows the reflective layer to improve light reflection efficiency while avoiding manufacturing problems caused by heightwise gaps between LEDs and LED drivers.
2Ease of manufacture
If the second reflective layer is disposed around both LEDs and LED drivers, then manufacturing issues are resolved, but light reflection efficiency decreases due to unnecessary material placement
Solution Approach 1:
The second reflective layer is selectively disposed only in regions where light reflection is needed (around LEDs), while intentionally leaving gaps in regions where LED drivers will be mounted. This local differentiation allows the reflective layer to improve light reflection efficiency while avoiding manufacturing problems caused by heightwise gaps between LEDs and LED drivers.
3Ease of manufacture
If the second reflective layer is completely removed, then manufacturing is simplified, but light reflection efficiency and usage efficiency of light deteriorate
Solution Approach 1:
The second reflective layer is selectively disposed only in regions where light reflection is needed (around LEDs), while intentionally leaving gaps in regions where LED drivers will be mounted. This local differentiation allows the reflective layer to improve light reflection efficiency while avoiding manufacturing problems caused by heightwise gaps between LEDs and LED drivers.
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 allows for efficient light reflection and reduces manufacturing issues by ensuring appropriate placement and connection of components, enhancing the usage efficiency of light and flexibility of the substrate.
Implementation Method 1
a first reflective layer that is provided on the first principal face of the substrate and that has a first opening coinciding with the first conductive portion and a second opening coinciding with the second conductive portion, a light-emitting part that is attached on the first principal face of the substrate and that is connected to the first conductive portion through the first opening... a second reflective layer that is provided on the first reflective layer. The second reflective layer includes a first reflective portion disposed around the light-emitting part
Data Source
AI summary
A lighting device includes a substrate, a first conductive portion, a second conductive portion disposed with a spacing as to the first conductive portion, a first reflective layer having a first opening coinciding with the first conductive portion and a second opening coinciding with the second conductive portion, a light-emitting part connected to the first conductive portion through the first opening, a non-light-emitting part connected to the second conductive portion through the second opening, and a second reflective layer. The second reflective layer includes a first reflective portion disposed around the light-emitting part, and a second reflective portion disposed around the non-light-emitting part.