Light Source Assembly With Diffuser Layer for Halo Reduction
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Solution Overview
Problem
Current light source assemblies face challenges in achieving high dynamic contrast due to the 'halo effect' caused by light reflection, which blurs the distinction between bright and dark regions, leading to a less vivid and less detailed image experience.
Innovation Solution
Incorporating a diffuser layer with a haze greater than 85% between the optical film and the light-emitting element, along with an optical functional film that reduces light reflection back to the substrate, and a wavelength transformation layer to enhance light uniformity and reduce halo size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional light source assembly structure is used, then the structure is simple, but the dynamic contrast is low due to the halo effect
Solution Approach 1:
The optical film is divided into multiple functional layers: a first optical film layer with light-reflecting properties and a second optical film layer with light-diffusing properties. This segmentation allows each layer to perform its specific function, reducing the halo effect and improving dynamic contrast while maintaining manageable structural complexity.
Solution Approach 2:
A diffuser layer is introduced as an intermediary component between the light-emitting element and the optical film. This diffuser layer mediates the light path, scattering reflected light to reduce the halo effect and improve image quality without requiring complete structural redesign.
2Object-affected harmful factors
If light reflects back to the substrate, then the structure is simple, but the halo effect increases and image quality deteriorates
Solution Approach 1:
The patent converts the harmful light reflection back to the substrate into a beneficial effect by using a light-reflecting layer that redirects this reflected light through the display panel. This converts what would be waste light into useful illumination, reducing the halo effect while improving light utilization efficiency.
Solution Approach 2:
The optical film structure is designed with different local properties: the first optical film layer has light-reflecting properties targeted at specific angles, while the second optical film layer has light-diffusing properties. This local differentiation allows precise control over light paths to minimize halo effects in critical areas.
3Stability of the object's composition
If the light-emitting element thickness is large, then the structural stability is improved, but the distance to the diffuser layer increases reducing light control efficiency
Solution Approach 1:
The patent introduces a vertical stacking dimension with multiple optical film layers at different positions relative to the light-emitting element. This multi-dimensional arrangement allows the system to achieve both structural stability through adequate spacing and effective light control through strategically positioned optical layers at optimized distances.
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 effectively reduces the halo effect, improving the dynamic contrast and uniformity of the light source assembly, resulting in a more vivid and detailed image experience by minimizing light reflection and enhancing light distribution.
Implementation Method 1
A diffuser layer is disposed between the optical film and the light-emitting element, wherein a haze of the diffuser layer is greater than 85%
Implementation Method 2
an optical functional film that reduces light reflection back to the substrate
Implementation Method 3
a wavelength transformation layer to enhance light uniformity and reduce halo size
Data Source
AI summary
A light source assembly is provided, including a substrate; a light-emitting element disposed on the substrate; and an optical film disposed on the light-emitting element. A diffuser layer is disposed between the optical film and the light-emitting element, wherein a haze of the diffuser layer is greater than 85%, a distance between the diffuser layer and the light-emitting element is in a range from 0 mm to 10 mm, and a thickness of the light-emitting element is less than the distance.