Backlight Assembly Spacer for Quantum Dot Uniformity
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Solution Overview
Problem
Existing backlight assemblies for display devices face challenges in achieving high color reproducibility and thermal conductivity due to non-uniform phosphor arrangement in quantum dot rails, and require additional mold frames for fixing quantum dot disks, which increases complexity and cost.
Innovation Solution
A backlight assembly design that includes a spacer configured to fix a wavelength converting unit to a light source unit, utilizing a light transmission unit with quantum dot particles between glass panels and a sealing member to ensure uniform phosphor distribution and eliminate the need for additional mold frames, while maintaining thermal conductivity and shock resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a quantum dot rail structure is used to improve color reproducibility, then color reproduction is enhanced, but phosphor arrangement becomes non-uniform and thermal conductivity decreases
Solution Approach 1:
The invention divides the wavelength converting unit into separate glass panels (first glass and second glass) with quantum dot particles positioned between them. This segmentation allows precise control of phosphor arrangement while maintaining uniformity, resolving the contradiction between color reproducibility and phosphor uniformity.
Solution Approach 2:
The spacer acts as an intermediary element that bonds the wavelength converting unit to the light source unit. It provides a structured interface that ensures uniform phosphor distribution while maintaining thermal conductivity pathways, thus resolving the contradiction between color reproduction and phosphor arrangement stability.
2Stability of the object's composition
If a quantum dot disk structure is used to improve phosphor uniformity, then phosphor arrangement becomes uniform, but additional mold frames are required increasing device complexity
Solution Approach 1:
The invention merges the spacer function with the bonding function by integrating the wavelength converting unit directly onto the light source unit through the spacer. This eliminates the need for separate mold frames, reducing device complexity while maintaining phosphor uniformity.
Solution Approach 2:
The spacer serves multiple functions: it bonds the wavelength converting unit to the light source unit, maintains uniform phosphor arrangement, and provides structural support. This multi-functionality eliminates the need for additional mold frames, resolving the contradiction between phosphor uniformity and device complexity.
3Manufacturing precision
If a quantum dot rail is used to achieve high color reproducibility, then color reproduction improves, but shock resistance decreases
Solution Approach 1:
The wavelength converting unit is segmented into separate glass panels with quantum dot particles positioned between them. This segmentation, combined with the spacer bonding structure, creates a more robust assembly that maintains color reproducibility while improving shock resistance compared to the rail structure.
Solution Approach 2:
The spacer serves as a mediator that provides structural support and bonding between the wavelength converting unit and light source unit. This intermediary structure enhances shock resistance while maintaining the color reproducibility achieved through the quantum dot arrangement.
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 enhances color reproducibility and reduces manufacturing costs by integrating the wavelength converting unit with the light source unit, improving process efficiency and eliminating the need for additional mold frames, while maintaining thermal conductivity and shock resistance.
Implementation Method 1
The LED light source emits blue light and provides white light by using other color converting materials, such as a phosphor and the like. The blue light is later converted to white light
Implementation Method 2
a light guide plate having a first surface configured to receive light emitted from the light source and a second and different surface to emit light
Data Source
AI summary
A backlight assembly includes a circuit substrate, a light source arranged on the circuit substrate, a light guide plate having a first surface configured to receive light emitted from the light source and a second and different surface to emit light, a wavelength converting unit arranged between the light source and the light guide plate and a spacer arranged around the light source. The spacer is spaced apart from the light source in a direction perpendicular to the light-emitting direction of the light emitted from the light source.