Backlight Module Bezel Narrowing via Quantum Dot Zone Segmentation
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Solution Overview
Problem
Conventional backlight modules with quantum dot films suffer from a marginal gamut ineffective zone, leading to a black edge and increased bezel width, which affects visual performance and market competitiveness.
Innovation Solution
A backlight module design that includes a light source, light guide plate, optical film assembly, and quantum dot film with a gamut conversion zone stacked between the optical film assembly and light exit surface, and a gamut ineffective zone projecting outward, which is covered by a narrow bezel using a mold frame and backplane configuration, allowing for bezel narrowing while maintaining high color gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a quantum dot film is used to achieve high color gamut, then color gamut is improved, but a black edge appears in the marginal edge and bezel width must be increased
Solution Approach 1:
The quantum dot film is divided into two functional zones: a gamut conversion zone for color enhancement and a gamut ineffective zone for structural support. This segmentation allows the effective quantum dot region to be positioned away from the marginal edge, eliminating the black edge effect while maintaining high color gamut performance.
Solution Approach 2:
The patent positions the gamut conversion zone at a specific distance from the light guide plate edge, creating a spatial separation in the depth dimension. By stacking the optical film assembly between the light guide plate and the gamut conversion zone, the effective quantum dot region is moved to a position where it does not create marginal edge effects, thus reducing bezel width requirements.
2Illumination intensity
If the gamut ineffective zone is covered to eliminate black edge, then visual performance is improved, but device complexity increases due to additional mold frame and backplane structures
Solution Approach 1:
The mold frame and backplane structures serve multiple functions: they provide structural support for the light guide plate and optical components, define the module boundaries, and simultaneously cover the gamut ineffective zone to eliminate black edge effects. This multi-functionality reduces the need for separate components and simplifies the overall structure.
Solution Approach 2:
The patent integrates the covering function into the existing mold frame and backplane structures rather than adding separate components. The mold frame surrounds the light guide plate while the backplane covers the gamut ineffective zone, merging structural support and visual correction functions into unified components.
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 design enables a narrower bezel width while achieving high color gamut, enhancing visual performance and market competitiveness by effectively addressing the gamut ineffective zone issue.
Implementation Method 1
a quantum dot film comprises a gamut conversion zone and a gamut ineffective zone located on an outer circumference of the gamut conversion zone
Data Source
AI summary
A backlight module includes a light source, a light guide plate, an optical film assembly, and a quantum dot film. The light guide plate includes a light exit surface, a back surface opposite to the light exit surface, and a side surface connected between the light exit surface and the back surface. The light source is arranged adjacent to the side surface of the light guide plate to emit light to the light guide plate. The quantum dot film includes a gamut conversion zone and a gamut ineffective zone located on an outer circumference of the gamut conversion zone. The gamut conversion zone is stacked between the optical film assembly and the light exit surface. The gamut ineffective zone projects outward from an edge of the optical film assembly. The backlight module allows for bezel narrowing, while possessing high color gamut.