LED Strip Embedding in Scattering Substrate Recesses
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Solution Overview
Problem
The misalignment between the LED strip and the light guide plate in LCD backlights leads to light leakage, reducing the performance of display devices due to a small adhesion area.
Innovation Solution
A backlight source with a scattering substrate featuring recesses that correspond one-to-one with the light-emitting diodes, allowing the LED strip to be embedded and fixed, preventing misalignment and enhancing adhesion, thereby reducing light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the LED strip is directly adhered to the planar side surface of the light guide plate, then the structure is simple and easy to manufacture, but the adhesion area is small leading to misalignment and light leakage
Solution Approach 1:
The patent applies local quality by creating recesses at specific locations on the light guide plate corresponding to LED positions, rather than maintaining a uniformly planar surface. This local structural modification increases adhesion area at critical points while keeping the overall structure simple and manufacturable.
Solution Approach 2:
The recesses are pre-formed on the light guide plate before LED assembly, establishing predetermined alignment positions in advance. This preliminary action ensures that when LEDs are installed, they automatically align with the recesses, preventing misalignment and light leakage while simplifying the assembly process.
2Reliability
If the adhesion area between LED strip and light guide plate is increased, then alignment stability improves, but the structural complexity increases
Solution Approach 1:
Instead of increasing adhesion area across the entire surface, the patent introduces recesses only at specific locations where LEDs are positioned. This localized approach increases adhesion area precisely where needed for alignment stability while adding minimal structural complexity to the overall design.
Solution Approach 2:
The light guide plate surface is segmented into multiple recesses distributed at different locations corresponding to LED positions. This segmentation increases total adhesion area through multiple discrete contact points rather than a single large adhesive region, improving alignment stability without requiring a uniformly complex structure.
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
The solution ensures a stable alignment between the LED strip and the scattering substrate, improving the performance of display devices by minimizing light leakage and enhancing light distribution uniformity.
Implementation Method 1
the scattering substrate comprises recesses at a surface corresponding to the light-emitting diode strip, the recesses corresponding one-to-one with the light-emitting diodes, the light-emitting diodes embedded into the recesses
Implementation Method 2
a backlight source comprising a scattering substrate and a light-emitting diode strip
Data Source
AI summary
The present disclosure relates to the field of display technology, and provides a backlight source and a display device, which address the problem that the misalignment readily occurring between the LED strip and the light guide plate results in a light leakage in the light-emitting diodes and hence a reduced performance of the display device. A backlight source comprises a scattering substrate and a light-emitting diode strip, wherein the light-emitting diode strip comprises a circuit board and light-emitting diodes arranged at intervals on the circuit board, and the scattering substrate comprises recesses at a surface corresponding to the light-emitting diode strip, the recesses corresponding one-to-one with the light-emitting diodes, the light-emitting diodes embedded into the recesses. A display device comprises the backlight.